[Intel-gfx] [PATCH 07/13] drm/i915: refactor pll code out into intel_dpll.c
Dave Airlie
airlied at gmail.com
Fri Dec 18 06:04:14 UTC 2020
From: Dave Airlie <airlied at redhat.com>
This pulls a large chunk of the pll calculation code out of
intel_display.c to a new file.
One function makes sense to be an inline, otherwise this
is pretty much a straight copy cover. Also all the
remaining hooks for g45 and older end up the same now.
Signed-off-by: Dave Airlie <airlied at redhat.com>
[Jani: cleaned up intel_dpll.h a bit, de-duped intel_panel_use_ssc().]
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/display/intel_display.c | 1402 +----------------
drivers/gpu/drm/i915/display/intel_display.h | 3 +
.../drm/i915/display/intel_display_types.h | 13 +
drivers/gpu/drm/i915/display/intel_dpll.c | 1363 ++++++++++++++++
drivers/gpu/drm/i915/display/intel_dpll.h | 23 +
6 files changed, 1414 insertions(+), 1391 deletions(-)
create mode 100644 drivers/gpu/drm/i915/display/intel_dpll.c
create mode 100644 drivers/gpu/drm/i915/display/intel_dpll.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index 9f50165004d8..303119466d12 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -202,6 +202,7 @@ i915-y += \
display/intel_display.o \
display/intel_display_power.o \
display/intel_dpio_phy.o \
+ display/intel_dpll.o \
display/intel_dpll_mgr.o \
display/intel_dsb.o \
display/intel_fbc.o \
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 514b8378acf1..88aeccc3020b 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -48,6 +48,7 @@
#include "display/intel_display_debugfs.h"
#include "display/intel_dp.h"
#include "display/intel_dp_mst.h"
+#include "display/intel_dpll.h"
#include "display/intel_dpll_mgr.h"
#include "display/intel_dsi.h"
#include "display/intel_dvo.h"
@@ -115,17 +116,6 @@ static void ilk_pfit_enable(const struct intel_crtc_state *crtc_state);
static void intel_modeset_setup_hw_state(struct drm_device *dev,
struct drm_modeset_acquire_ctx *ctx);
-struct intel_limit {
- struct {
- int min, max;
- } dot, vco, n, m, m1, m2, p, p1;
-
- struct {
- int dot_limit;
- int p2_slow, p2_fast;
- } p2;
-};
-
/* returns HPLL frequency in kHz */
int vlv_get_hpll_vco(struct drm_i915_private *dev_priv)
{
@@ -193,271 +183,6 @@ static u32 intel_fdi_link_freq(struct drm_i915_private *dev_priv,
return dev_priv->fdi_pll_freq;
}
-static const struct intel_limit intel_limits_i8xx_dac = {
- .dot = { .min = 25000, .max = 350000 },
- .vco = { .min = 908000, .max = 1512000 },
- .n = { .min = 2, .max = 16 },
- .m = { .min = 96, .max = 140 },
- .m1 = { .min = 18, .max = 26 },
- .m2 = { .min = 6, .max = 16 },
- .p = { .min = 4, .max = 128 },
- .p1 = { .min = 2, .max = 33 },
- .p2 = { .dot_limit = 165000,
- .p2_slow = 4, .p2_fast = 2 },
-};
-
-static const struct intel_limit intel_limits_i8xx_dvo = {
- .dot = { .min = 25000, .max = 350000 },
- .vco = { .min = 908000, .max = 1512000 },
- .n = { .min = 2, .max = 16 },
- .m = { .min = 96, .max = 140 },
- .m1 = { .min = 18, .max = 26 },
- .m2 = { .min = 6, .max = 16 },
- .p = { .min = 4, .max = 128 },
- .p1 = { .min = 2, .max = 33 },
- .p2 = { .dot_limit = 165000,
- .p2_slow = 4, .p2_fast = 4 },
-};
-
-static const struct intel_limit intel_limits_i8xx_lvds = {
- .dot = { .min = 25000, .max = 350000 },
- .vco = { .min = 908000, .max = 1512000 },
- .n = { .min = 2, .max = 16 },
- .m = { .min = 96, .max = 140 },
- .m1 = { .min = 18, .max = 26 },
- .m2 = { .min = 6, .max = 16 },
- .p = { .min = 4, .max = 128 },
- .p1 = { .min = 1, .max = 6 },
- .p2 = { .dot_limit = 165000,
- .p2_slow = 14, .p2_fast = 7 },
-};
-
-static const struct intel_limit intel_limits_i9xx_sdvo = {
- .dot = { .min = 20000, .max = 400000 },
- .vco = { .min = 1400000, .max = 2800000 },
- .n = { .min = 1, .max = 6 },
- .m = { .min = 70, .max = 120 },
- .m1 = { .min = 8, .max = 18 },
- .m2 = { .min = 3, .max = 7 },
- .p = { .min = 5, .max = 80 },
- .p1 = { .min = 1, .max = 8 },
- .p2 = { .dot_limit = 200000,
- .p2_slow = 10, .p2_fast = 5 },
-};
-
-static const struct intel_limit intel_limits_i9xx_lvds = {
- .dot = { .min = 20000, .max = 400000 },
- .vco = { .min = 1400000, .max = 2800000 },
- .n = { .min = 1, .max = 6 },
- .m = { .min = 70, .max = 120 },
- .m1 = { .min = 8, .max = 18 },
- .m2 = { .min = 3, .max = 7 },
- .p = { .min = 7, .max = 98 },
- .p1 = { .min = 1, .max = 8 },
- .p2 = { .dot_limit = 112000,
- .p2_slow = 14, .p2_fast = 7 },
-};
-
-
-static const struct intel_limit intel_limits_g4x_sdvo = {
- .dot = { .min = 25000, .max = 270000 },
- .vco = { .min = 1750000, .max = 3500000},
- .n = { .min = 1, .max = 4 },
- .m = { .min = 104, .max = 138 },
- .m1 = { .min = 17, .max = 23 },
- .m2 = { .min = 5, .max = 11 },
- .p = { .min = 10, .max = 30 },
- .p1 = { .min = 1, .max = 3},
- .p2 = { .dot_limit = 270000,
- .p2_slow = 10,
- .p2_fast = 10
- },
-};
-
-static const struct intel_limit intel_limits_g4x_hdmi = {
- .dot = { .min = 22000, .max = 400000 },
- .vco = { .min = 1750000, .max = 3500000},
- .n = { .min = 1, .max = 4 },
- .m = { .min = 104, .max = 138 },
- .m1 = { .min = 16, .max = 23 },
- .m2 = { .min = 5, .max = 11 },
- .p = { .min = 5, .max = 80 },
- .p1 = { .min = 1, .max = 8},
- .p2 = { .dot_limit = 165000,
- .p2_slow = 10, .p2_fast = 5 },
-};
-
-static const struct intel_limit intel_limits_g4x_single_channel_lvds = {
- .dot = { .min = 20000, .max = 115000 },
- .vco = { .min = 1750000, .max = 3500000 },
- .n = { .min = 1, .max = 3 },
- .m = { .min = 104, .max = 138 },
- .m1 = { .min = 17, .max = 23 },
- .m2 = { .min = 5, .max = 11 },
- .p = { .min = 28, .max = 112 },
- .p1 = { .min = 2, .max = 8 },
- .p2 = { .dot_limit = 0,
- .p2_slow = 14, .p2_fast = 14
- },
-};
-
-static const struct intel_limit intel_limits_g4x_dual_channel_lvds = {
- .dot = { .min = 80000, .max = 224000 },
- .vco = { .min = 1750000, .max = 3500000 },
- .n = { .min = 1, .max = 3 },
- .m = { .min = 104, .max = 138 },
- .m1 = { .min = 17, .max = 23 },
- .m2 = { .min = 5, .max = 11 },
- .p = { .min = 14, .max = 42 },
- .p1 = { .min = 2, .max = 6 },
- .p2 = { .dot_limit = 0,
- .p2_slow = 7, .p2_fast = 7
- },
-};
-
-static const struct intel_limit pnv_limits_sdvo = {
- .dot = { .min = 20000, .max = 400000},
- .vco = { .min = 1700000, .max = 3500000 },
- /* Pineview's Ncounter is a ring counter */
- .n = { .min = 3, .max = 6 },
- .m = { .min = 2, .max = 256 },
- /* Pineview only has one combined m divider, which we treat as m2. */
- .m1 = { .min = 0, .max = 0 },
- .m2 = { .min = 0, .max = 254 },
- .p = { .min = 5, .max = 80 },
- .p1 = { .min = 1, .max = 8 },
- .p2 = { .dot_limit = 200000,
- .p2_slow = 10, .p2_fast = 5 },
-};
-
-static const struct intel_limit pnv_limits_lvds = {
- .dot = { .min = 20000, .max = 400000 },
- .vco = { .min = 1700000, .max = 3500000 },
- .n = { .min = 3, .max = 6 },
- .m = { .min = 2, .max = 256 },
- .m1 = { .min = 0, .max = 0 },
- .m2 = { .min = 0, .max = 254 },
- .p = { .min = 7, .max = 112 },
- .p1 = { .min = 1, .max = 8 },
- .p2 = { .dot_limit = 112000,
- .p2_slow = 14, .p2_fast = 14 },
-};
-
-/* Ironlake / Sandybridge
- *
- * We calculate clock using (register_value + 2) for N/M1/M2, so here
- * the range value for them is (actual_value - 2).
- */
-static const struct intel_limit ilk_limits_dac = {
- .dot = { .min = 25000, .max = 350000 },
- .vco = { .min = 1760000, .max = 3510000 },
- .n = { .min = 1, .max = 5 },
- .m = { .min = 79, .max = 127 },
- .m1 = { .min = 12, .max = 22 },
- .m2 = { .min = 5, .max = 9 },
- .p = { .min = 5, .max = 80 },
- .p1 = { .min = 1, .max = 8 },
- .p2 = { .dot_limit = 225000,
- .p2_slow = 10, .p2_fast = 5 },
-};
-
-static const struct intel_limit ilk_limits_single_lvds = {
- .dot = { .min = 25000, .max = 350000 },
- .vco = { .min = 1760000, .max = 3510000 },
- .n = { .min = 1, .max = 3 },
- .m = { .min = 79, .max = 118 },
- .m1 = { .min = 12, .max = 22 },
- .m2 = { .min = 5, .max = 9 },
- .p = { .min = 28, .max = 112 },
- .p1 = { .min = 2, .max = 8 },
- .p2 = { .dot_limit = 225000,
- .p2_slow = 14, .p2_fast = 14 },
-};
-
-static const struct intel_limit ilk_limits_dual_lvds = {
- .dot = { .min = 25000, .max = 350000 },
- .vco = { .min = 1760000, .max = 3510000 },
- .n = { .min = 1, .max = 3 },
- .m = { .min = 79, .max = 127 },
- .m1 = { .min = 12, .max = 22 },
- .m2 = { .min = 5, .max = 9 },
- .p = { .min = 14, .max = 56 },
- .p1 = { .min = 2, .max = 8 },
- .p2 = { .dot_limit = 225000,
- .p2_slow = 7, .p2_fast = 7 },
-};
-
-/* LVDS 100mhz refclk limits. */
-static const struct intel_limit ilk_limits_single_lvds_100m = {
- .dot = { .min = 25000, .max = 350000 },
- .vco = { .min = 1760000, .max = 3510000 },
- .n = { .min = 1, .max = 2 },
- .m = { .min = 79, .max = 126 },
- .m1 = { .min = 12, .max = 22 },
- .m2 = { .min = 5, .max = 9 },
- .p = { .min = 28, .max = 112 },
- .p1 = { .min = 2, .max = 8 },
- .p2 = { .dot_limit = 225000,
- .p2_slow = 14, .p2_fast = 14 },
-};
-
-static const struct intel_limit ilk_limits_dual_lvds_100m = {
- .dot = { .min = 25000, .max = 350000 },
- .vco = { .min = 1760000, .max = 3510000 },
- .n = { .min = 1, .max = 3 },
- .m = { .min = 79, .max = 126 },
- .m1 = { .min = 12, .max = 22 },
- .m2 = { .min = 5, .max = 9 },
- .p = { .min = 14, .max = 42 },
- .p1 = { .min = 2, .max = 6 },
- .p2 = { .dot_limit = 225000,
- .p2_slow = 7, .p2_fast = 7 },
-};
-
-static const struct intel_limit intel_limits_vlv = {
- /*
- * These are the data rate limits (measured in fast clocks)
- * since those are the strictest limits we have. The fast
- * clock and actual rate limits are more relaxed, so checking
- * them would make no difference.
- */
- .dot = { .min = 25000 * 5, .max = 270000 * 5 },
- .vco = { .min = 4000000, .max = 6000000 },
- .n = { .min = 1, .max = 7 },
- .m1 = { .min = 2, .max = 3 },
- .m2 = { .min = 11, .max = 156 },
- .p1 = { .min = 2, .max = 3 },
- .p2 = { .p2_slow = 2, .p2_fast = 20 }, /* slow=min, fast=max */
-};
-
-static const struct intel_limit intel_limits_chv = {
- /*
- * These are the data rate limits (measured in fast clocks)
- * since those are the strictest limits we have. The fast
- * clock and actual rate limits are more relaxed, so checking
- * them would make no difference.
- */
- .dot = { .min = 25000 * 5, .max = 540000 * 5},
- .vco = { .min = 4800000, .max = 6480000 },
- .n = { .min = 1, .max = 1 },
- .m1 = { .min = 2, .max = 2 },
- .m2 = { .min = 24 << 22, .max = 175 << 22 },
- .p1 = { .min = 2, .max = 4 },
- .p2 = { .p2_slow = 1, .p2_fast = 14 },
-};
-
-static const struct intel_limit intel_limits_bxt = {
- /* FIXME: find real dot limits */
- .dot = { .min = 0, .max = INT_MAX },
- .vco = { .min = 4800000, .max = 6700000 },
- .n = { .min = 1, .max = 1 },
- .m1 = { .min = 2, .max = 2 },
- /* FIXME: find real m2 limits */
- .m2 = { .min = 2 << 22, .max = 255 << 22 },
- .p1 = { .min = 2, .max = 4 },
- .p2 = { .p2_slow = 1, .p2_fast = 20 },
-};
-
/* WA Display #0827: Gen9:all */
static void
skl_wa_827(struct drm_i915_private *dev_priv, enum pipe pipe, bool enable)
@@ -502,483 +227,6 @@ is_trans_port_sync_mode(const struct intel_crtc_state *crtc_state)
is_trans_port_sync_slave(crtc_state);
}
-/*
- * Platform specific helpers to calculate the port PLL loopback- (clock.m),
- * and post-divider (clock.p) values, pre- (clock.vco) and post-divided fast
- * (clock.dot) clock rates. This fast dot clock is fed to the port's IO logic.
- * The helpers' return value is the rate of the clock that is fed to the
- * display engine's pipe which can be the above fast dot clock rate or a
- * divided-down version of it.
- */
-/* m1 is reserved as 0 in Pineview, n is a ring counter */
-static int pnv_calc_dpll_params(int refclk, struct dpll *clock)
-{
- clock->m = clock->m2 + 2;
- clock->p = clock->p1 * clock->p2;
- if (WARN_ON(clock->n == 0 || clock->p == 0))
- return 0;
- clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n);
- clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
-
- return clock->dot;
-}
-
-static u32 i9xx_dpll_compute_m(struct dpll *dpll)
-{
- return 5 * (dpll->m1 + 2) + (dpll->m2 + 2);
-}
-
-static int i9xx_calc_dpll_params(int refclk, struct dpll *clock)
-{
- clock->m = i9xx_dpll_compute_m(clock);
- clock->p = clock->p1 * clock->p2;
- if (WARN_ON(clock->n + 2 == 0 || clock->p == 0))
- return 0;
- clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n + 2);
- clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
-
- return clock->dot;
-}
-
-static int vlv_calc_dpll_params(int refclk, struct dpll *clock)
-{
- clock->m = clock->m1 * clock->m2;
- clock->p = clock->p1 * clock->p2;
- if (WARN_ON(clock->n == 0 || clock->p == 0))
- return 0;
- clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n);
- clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
-
- return clock->dot / 5;
-}
-
-int chv_calc_dpll_params(int refclk, struct dpll *clock)
-{
- clock->m = clock->m1 * clock->m2;
- clock->p = clock->p1 * clock->p2;
- if (WARN_ON(clock->n == 0 || clock->p == 0))
- return 0;
- clock->vco = DIV_ROUND_CLOSEST_ULL(mul_u32_u32(refclk, clock->m),
- clock->n << 22);
- clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
-
- return clock->dot / 5;
-}
-
-/*
- * Returns whether the given set of divisors are valid for a given refclk with
- * the given connectors.
- */
-static bool intel_pll_is_valid(struct drm_i915_private *dev_priv,
- const struct intel_limit *limit,
- const struct dpll *clock)
-{
- if (clock->n < limit->n.min || limit->n.max < clock->n)
- return false;
- if (clock->p1 < limit->p1.min || limit->p1.max < clock->p1)
- return false;
- if (clock->m2 < limit->m2.min || limit->m2.max < clock->m2)
- return false;
- if (clock->m1 < limit->m1.min || limit->m1.max < clock->m1)
- return false;
-
- if (!IS_PINEVIEW(dev_priv) && !IS_VALLEYVIEW(dev_priv) &&
- !IS_CHERRYVIEW(dev_priv) && !IS_GEN9_LP(dev_priv))
- if (clock->m1 <= clock->m2)
- return false;
-
- if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv) &&
- !IS_GEN9_LP(dev_priv)) {
- if (clock->p < limit->p.min || limit->p.max < clock->p)
- return false;
- if (clock->m < limit->m.min || limit->m.max < clock->m)
- return false;
- }
-
- if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
- return false;
- /* XXX: We may need to be checking "Dot clock" depending on the multiplier,
- * connector, etc., rather than just a single range.
- */
- if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
- return false;
-
- return true;
-}
-
-static int
-i9xx_select_p2_div(const struct intel_limit *limit,
- const struct intel_crtc_state *crtc_state,
- int target)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
- /*
- * For LVDS just rely on its current settings for dual-channel.
- * We haven't figured out how to reliably set up different
- * single/dual channel state, if we even can.
- */
- if (intel_is_dual_link_lvds(dev_priv))
- return limit->p2.p2_fast;
- else
- return limit->p2.p2_slow;
- } else {
- if (target < limit->p2.dot_limit)
- return limit->p2.p2_slow;
- else
- return limit->p2.p2_fast;
- }
-}
-
-/*
- * Returns a set of divisors for the desired target clock with the given
- * refclk, or FALSE. The returned values represent the clock equation:
- * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
- *
- * Target and reference clocks are specified in kHz.
- *
- * If match_clock is provided, then best_clock P divider must match the P
- * divider from @match_clock used for LVDS downclocking.
- */
-static bool
-i9xx_find_best_dpll(const struct intel_limit *limit,
- struct intel_crtc_state *crtc_state,
- int target, int refclk, struct dpll *match_clock,
- struct dpll *best_clock)
-{
- struct drm_device *dev = crtc_state->uapi.crtc->dev;
- struct dpll clock;
- int err = target;
-
- memset(best_clock, 0, sizeof(*best_clock));
-
- clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
-
- for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
- clock.m1++) {
- for (clock.m2 = limit->m2.min;
- clock.m2 <= limit->m2.max; clock.m2++) {
- if (clock.m2 >= clock.m1)
- break;
- for (clock.n = limit->n.min;
- clock.n <= limit->n.max; clock.n++) {
- for (clock.p1 = limit->p1.min;
- clock.p1 <= limit->p1.max; clock.p1++) {
- int this_err;
-
- i9xx_calc_dpll_params(refclk, &clock);
- if (!intel_pll_is_valid(to_i915(dev),
- limit,
- &clock))
- continue;
- if (match_clock &&
- clock.p != match_clock->p)
- continue;
-
- this_err = abs(clock.dot - target);
- if (this_err < err) {
- *best_clock = clock;
- err = this_err;
- }
- }
- }
- }
- }
-
- return (err != target);
-}
-
-/*
- * Returns a set of divisors for the desired target clock with the given
- * refclk, or FALSE. The returned values represent the clock equation:
- * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
- *
- * Target and reference clocks are specified in kHz.
- *
- * If match_clock is provided, then best_clock P divider must match the P
- * divider from @match_clock used for LVDS downclocking.
- */
-static bool
-pnv_find_best_dpll(const struct intel_limit *limit,
- struct intel_crtc_state *crtc_state,
- int target, int refclk, struct dpll *match_clock,
- struct dpll *best_clock)
-{
- struct drm_device *dev = crtc_state->uapi.crtc->dev;
- struct dpll clock;
- int err = target;
-
- memset(best_clock, 0, sizeof(*best_clock));
-
- clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
-
- for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
- clock.m1++) {
- for (clock.m2 = limit->m2.min;
- clock.m2 <= limit->m2.max; clock.m2++) {
- for (clock.n = limit->n.min;
- clock.n <= limit->n.max; clock.n++) {
- for (clock.p1 = limit->p1.min;
- clock.p1 <= limit->p1.max; clock.p1++) {
- int this_err;
-
- pnv_calc_dpll_params(refclk, &clock);
- if (!intel_pll_is_valid(to_i915(dev),
- limit,
- &clock))
- continue;
- if (match_clock &&
- clock.p != match_clock->p)
- continue;
-
- this_err = abs(clock.dot - target);
- if (this_err < err) {
- *best_clock = clock;
- err = this_err;
- }
- }
- }
- }
- }
-
- return (err != target);
-}
-
-/*
- * Returns a set of divisors for the desired target clock with the given
- * refclk, or FALSE. The returned values represent the clock equation:
- * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
- *
- * Target and reference clocks are specified in kHz.
- *
- * If match_clock is provided, then best_clock P divider must match the P
- * divider from @match_clock used for LVDS downclocking.
- */
-static bool
-g4x_find_best_dpll(const struct intel_limit *limit,
- struct intel_crtc_state *crtc_state,
- int target, int refclk, struct dpll *match_clock,
- struct dpll *best_clock)
-{
- struct drm_device *dev = crtc_state->uapi.crtc->dev;
- struct dpll clock;
- int max_n;
- bool found = false;
- /* approximately equals target * 0.00585 */
- int err_most = (target >> 8) + (target >> 9);
-
- memset(best_clock, 0, sizeof(*best_clock));
-
- clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
-
- max_n = limit->n.max;
- /* based on hardware requirement, prefer smaller n to precision */
- for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
- /* based on hardware requirement, prefere larger m1,m2 */
- for (clock.m1 = limit->m1.max;
- clock.m1 >= limit->m1.min; clock.m1--) {
- for (clock.m2 = limit->m2.max;
- clock.m2 >= limit->m2.min; clock.m2--) {
- for (clock.p1 = limit->p1.max;
- clock.p1 >= limit->p1.min; clock.p1--) {
- int this_err;
-
- i9xx_calc_dpll_params(refclk, &clock);
- if (!intel_pll_is_valid(to_i915(dev),
- limit,
- &clock))
- continue;
-
- this_err = abs(clock.dot - target);
- if (this_err < err_most) {
- *best_clock = clock;
- err_most = this_err;
- max_n = clock.n;
- found = true;
- }
- }
- }
- }
- }
- return found;
-}
-
-/*
- * Check if the calculated PLL configuration is more optimal compared to the
- * best configuration and error found so far. Return the calculated error.
- */
-static bool vlv_PLL_is_optimal(struct drm_device *dev, int target_freq,
- const struct dpll *calculated_clock,
- const struct dpll *best_clock,
- unsigned int best_error_ppm,
- unsigned int *error_ppm)
-{
- /*
- * For CHV ignore the error and consider only the P value.
- * Prefer a bigger P value based on HW requirements.
- */
- if (IS_CHERRYVIEW(to_i915(dev))) {
- *error_ppm = 0;
-
- return calculated_clock->p > best_clock->p;
- }
-
- if (drm_WARN_ON_ONCE(dev, !target_freq))
- return false;
-
- *error_ppm = div_u64(1000000ULL *
- abs(target_freq - calculated_clock->dot),
- target_freq);
- /*
- * Prefer a better P value over a better (smaller) error if the error
- * is small. Ensure this preference for future configurations too by
- * setting the error to 0.
- */
- if (*error_ppm < 100 && calculated_clock->p > best_clock->p) {
- *error_ppm = 0;
-
- return true;
- }
-
- return *error_ppm + 10 < best_error_ppm;
-}
-
-/*
- * Returns a set of divisors for the desired target clock with the given
- * refclk, or FALSE. The returned values represent the clock equation:
- * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
- */
-static bool
-vlv_find_best_dpll(const struct intel_limit *limit,
- struct intel_crtc_state *crtc_state,
- int target, int refclk, struct dpll *match_clock,
- struct dpll *best_clock)
-{
- struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
- struct drm_device *dev = crtc->base.dev;
- struct dpll clock;
- unsigned int bestppm = 1000000;
- /* min update 19.2 MHz */
- int max_n = min(limit->n.max, refclk / 19200);
- bool found = false;
-
- target *= 5; /* fast clock */
-
- memset(best_clock, 0, sizeof(*best_clock));
-
- /* based on hardware requirement, prefer smaller n to precision */
- for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
- for (clock.p1 = limit->p1.max; clock.p1 >= limit->p1.min; clock.p1--) {
- for (clock.p2 = limit->p2.p2_fast; clock.p2 >= limit->p2.p2_slow;
- clock.p2 -= clock.p2 > 10 ? 2 : 1) {
- clock.p = clock.p1 * clock.p2;
- /* based on hardware requirement, prefer bigger m1,m2 values */
- for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max; clock.m1++) {
- unsigned int ppm;
-
- clock.m2 = DIV_ROUND_CLOSEST(target * clock.p * clock.n,
- refclk * clock.m1);
-
- vlv_calc_dpll_params(refclk, &clock);
-
- if (!intel_pll_is_valid(to_i915(dev),
- limit,
- &clock))
- continue;
-
- if (!vlv_PLL_is_optimal(dev, target,
- &clock,
- best_clock,
- bestppm, &ppm))
- continue;
-
- *best_clock = clock;
- bestppm = ppm;
- found = true;
- }
- }
- }
- }
-
- return found;
-}
-
-/*
- * Returns a set of divisors for the desired target clock with the given
- * refclk, or FALSE. The returned values represent the clock equation:
- * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
- */
-static bool
-chv_find_best_dpll(const struct intel_limit *limit,
- struct intel_crtc_state *crtc_state,
- int target, int refclk, struct dpll *match_clock,
- struct dpll *best_clock)
-{
- struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
- struct drm_device *dev = crtc->base.dev;
- unsigned int best_error_ppm;
- struct dpll clock;
- u64 m2;
- int found = false;
-
- memset(best_clock, 0, sizeof(*best_clock));
- best_error_ppm = 1000000;
-
- /*
- * Based on hardware doc, the n always set to 1, and m1 always
- * set to 2. If requires to support 200Mhz refclk, we need to
- * revisit this because n may not 1 anymore.
- */
- clock.n = 1;
- clock.m1 = 2;
- target *= 5; /* fast clock */
-
- for (clock.p1 = limit->p1.max; clock.p1 >= limit->p1.min; clock.p1--) {
- for (clock.p2 = limit->p2.p2_fast;
- clock.p2 >= limit->p2.p2_slow;
- clock.p2 -= clock.p2 > 10 ? 2 : 1) {
- unsigned int error_ppm;
-
- clock.p = clock.p1 * clock.p2;
-
- m2 = DIV_ROUND_CLOSEST_ULL(mul_u32_u32(target, clock.p * clock.n) << 22,
- refclk * clock.m1);
-
- if (m2 > INT_MAX/clock.m1)
- continue;
-
- clock.m2 = m2;
-
- chv_calc_dpll_params(refclk, &clock);
-
- if (!intel_pll_is_valid(to_i915(dev), limit, &clock))
- continue;
-
- if (!vlv_PLL_is_optimal(dev, target, &clock, best_clock,
- best_error_ppm, &error_ppm))
- continue;
-
- *best_clock = clock;
- best_error_ppm = error_ppm;
- found = true;
- }
- }
-
- return found;
-}
-
-bool bxt_find_best_dpll(struct intel_crtc_state *crtc_state,
- struct dpll *best_clock)
-{
- int refclk = 100000;
- const struct intel_limit *limit = &intel_limits_bxt;
-
- return chv_find_best_dpll(limit, crtc_state,
- crtc_state->port_clock, refclk,
- NULL, best_clock);
-}
-
static bool pipe_scanline_is_moving(struct drm_i915_private *dev_priv,
enum pipe pipe)
{
@@ -5215,7 +4463,7 @@ static void ivb_update_fdi_bc_bifurcation(const struct intel_crtc_state *crtc_st
* Finds the encoder associated with the given CRTC. This can only be
* used when we know that the CRTC isn't feeding multiple encoders!
*/
-static struct intel_encoder *
+struct intel_encoder *
intel_get_crtc_new_encoder(const struct intel_atomic_state *state,
const struct intel_crtc_state *crtc_state)
{
@@ -7883,51 +7131,6 @@ static void intel_panel_sanitize_ssc(struct drm_i915_private *dev_priv)
}
}
-static bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
-{
- if (dev_priv->params.panel_use_ssc >= 0)
- return dev_priv->params.panel_use_ssc != 0;
- return dev_priv->vbt.lvds_use_ssc
- && !(dev_priv->quirks & QUIRK_LVDS_SSC_DISABLE);
-}
-
-static u32 pnv_dpll_compute_fp(struct dpll *dpll)
-{
- return (1 << dpll->n) << 16 | dpll->m2;
-}
-
-static u32 i9xx_dpll_compute_fp(struct dpll *dpll)
-{
- return dpll->n << 16 | dpll->m1 << 8 | dpll->m2;
-}
-
-static void i9xx_update_pll_dividers(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state,
- struct dpll *reduced_clock)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- u32 fp, fp2 = 0;
-
- if (IS_PINEVIEW(dev_priv)) {
- fp = pnv_dpll_compute_fp(&crtc_state->dpll);
- if (reduced_clock)
- fp2 = pnv_dpll_compute_fp(reduced_clock);
- } else {
- fp = i9xx_dpll_compute_fp(&crtc_state->dpll);
- if (reduced_clock)
- fp2 = i9xx_dpll_compute_fp(reduced_clock);
- }
-
- crtc_state->dpll_hw_state.fp0 = fp;
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
- reduced_clock) {
- crtc_state->dpll_hw_state.fp1 = fp2;
- } else {
- crtc_state->dpll_hw_state.fp1 = fp;
- }
-}
-
static void vlv_pllb_recal_opamp(struct drm_i915_private *dev_priv, enum pipe
pipe)
{
@@ -8052,39 +7255,6 @@ void intel_dp_set_m_n(const struct intel_crtc_state *crtc_state, enum link_m_n_s
intel_cpu_transcoder_set_m_n(crtc_state, dp_m_n, dp_m2_n2);
}
-static void vlv_compute_dpll(struct intel_crtc *crtc,
- struct intel_crtc_state *pipe_config)
-{
- pipe_config->dpll_hw_state.dpll = DPLL_INTEGRATED_REF_CLK_VLV |
- DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
- if (crtc->pipe != PIPE_A)
- pipe_config->dpll_hw_state.dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
-
- /* DPLL not used with DSI, but still need the rest set up */
- if (!intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DSI))
- pipe_config->dpll_hw_state.dpll |= DPLL_VCO_ENABLE |
- DPLL_EXT_BUFFER_ENABLE_VLV;
-
- pipe_config->dpll_hw_state.dpll_md =
- (pipe_config->pixel_multiplier - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
-}
-
-static void chv_compute_dpll(struct intel_crtc *crtc,
- struct intel_crtc_state *pipe_config)
-{
- pipe_config->dpll_hw_state.dpll = DPLL_SSC_REF_CLK_CHV |
- DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
- if (crtc->pipe != PIPE_A)
- pipe_config->dpll_hw_state.dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
-
- /* DPLL not used with DSI, but still need the rest set up */
- if (!intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DSI))
- pipe_config->dpll_hw_state.dpll |= DPLL_VCO_ENABLE;
-
- pipe_config->dpll_hw_state.dpll_md =
- (pipe_config->pixel_multiplier - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
-}
-
static void vlv_prepare_pll(struct intel_crtc *crtc,
const struct intel_crtc_state *pipe_config)
{
@@ -8344,128 +7514,7 @@ void vlv_force_pll_off(struct drm_i915_private *dev_priv, enum pipe pipe)
vlv_disable_pll(dev_priv, pipe);
}
-static void i9xx_compute_dpll(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state,
- struct dpll *reduced_clock)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- u32 dpll;
- struct dpll *clock = &crtc_state->dpll;
- i9xx_update_pll_dividers(crtc, crtc_state, reduced_clock);
-
- dpll = DPLL_VGA_MODE_DIS;
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS))
- dpll |= DPLLB_MODE_LVDS;
- else
- dpll |= DPLLB_MODE_DAC_SERIAL;
-
- if (IS_I945G(dev_priv) || IS_I945GM(dev_priv) ||
- IS_G33(dev_priv) || IS_PINEVIEW(dev_priv)) {
- dpll |= (crtc_state->pixel_multiplier - 1)
- << SDVO_MULTIPLIER_SHIFT_HIRES;
- }
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO) ||
- intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
- dpll |= DPLL_SDVO_HIGH_SPEED;
-
- if (intel_crtc_has_dp_encoder(crtc_state))
- dpll |= DPLL_SDVO_HIGH_SPEED;
-
- /* compute bitmask from p1 value */
- if (IS_PINEVIEW(dev_priv))
- dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW;
- else {
- dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
- if (IS_G4X(dev_priv) && reduced_clock)
- dpll |= (1 << (reduced_clock->p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
- }
- switch (clock->p2) {
- case 5:
- dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
- break;
- case 7:
- dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
- break;
- case 10:
- dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
- break;
- case 14:
- dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
- break;
- }
- if (INTEL_GEN(dev_priv) >= 4)
- dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
-
- if (crtc_state->sdvo_tv_clock)
- dpll |= PLL_REF_INPUT_TVCLKINBC;
- else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
- intel_panel_use_ssc(dev_priv))
- dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
- else
- dpll |= PLL_REF_INPUT_DREFCLK;
-
- dpll |= DPLL_VCO_ENABLE;
- crtc_state->dpll_hw_state.dpll = dpll;
-
- if (INTEL_GEN(dev_priv) >= 4) {
- u32 dpll_md = (crtc_state->pixel_multiplier - 1)
- << DPLL_MD_UDI_MULTIPLIER_SHIFT;
- crtc_state->dpll_hw_state.dpll_md = dpll_md;
- }
-}
-
-static void i8xx_compute_dpll(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state,
- struct dpll *reduced_clock)
-{
- struct drm_device *dev = crtc->base.dev;
- struct drm_i915_private *dev_priv = to_i915(dev);
- u32 dpll;
- struct dpll *clock = &crtc_state->dpll;
-
- i9xx_update_pll_dividers(crtc, crtc_state, reduced_clock);
-
- dpll = DPLL_VGA_MODE_DIS;
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
- dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
- } else {
- if (clock->p1 == 2)
- dpll |= PLL_P1_DIVIDE_BY_TWO;
- else
- dpll |= (clock->p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
- if (clock->p2 == 4)
- dpll |= PLL_P2_DIVIDE_BY_4;
- }
-
- /*
- * Bspec:
- * "[Almador Errata}: For the correct operation of the muxed DVO pins
- * (GDEVSELB/I2Cdata, GIRDBY/I2CClk) and (GFRAMEB/DVI_Data,
- * GTRDYB/DVI_Clk): Bit 31 (DPLL VCO Enable) and Bit 30 (2X Clock
- * Enable) must be set to “1” in both the DPLL A Control Register
- * (06014h-06017h) and DPLL B Control Register (06018h-0601Bh)."
- *
- * For simplicity We simply keep both bits always enabled in
- * both DPLLS. The spec says we should disable the DVO 2X clock
- * when not needed, but this seems to work fine in practice.
- */
- if (IS_I830(dev_priv) ||
- intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DVO))
- dpll |= DPLL_DVO_2X_MODE;
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
- intel_panel_use_ssc(dev_priv))
- dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
- else
- dpll |= PLL_REF_INPUT_DREFCLK;
-
- dpll |= DPLL_VCO_ENABLE;
- crtc_state->dpll_hw_state.dpll = dpll;
-}
static void intel_set_transcoder_timings(const struct intel_crtc_state *crtc_state)
{
@@ -8671,207 +7720,6 @@ static void i9xx_set_pipeconf(const struct intel_crtc_state *crtc_state)
intel_de_posting_read(dev_priv, PIPECONF(crtc->pipe));
}
-static int i8xx_crtc_compute_clock(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state)
-{
- struct drm_device *dev = crtc->base.dev;
- struct drm_i915_private *dev_priv = to_i915(dev);
- const struct intel_limit *limit;
- int refclk = 48000;
-
- memset(&crtc_state->dpll_hw_state, 0,
- sizeof(crtc_state->dpll_hw_state));
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
- if (intel_panel_use_ssc(dev_priv)) {
- refclk = dev_priv->vbt.lvds_ssc_freq;
- drm_dbg_kms(&dev_priv->drm,
- "using SSC reference clock of %d kHz\n",
- refclk);
- }
-
- limit = &intel_limits_i8xx_lvds;
- } else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DVO)) {
- limit = &intel_limits_i8xx_dvo;
- } else {
- limit = &intel_limits_i8xx_dac;
- }
-
- if (!crtc_state->clock_set &&
- !i9xx_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
- refclk, NULL, &crtc_state->dpll)) {
- drm_err(&dev_priv->drm,
- "Couldn't find PLL settings for mode!\n");
- return -EINVAL;
- }
-
- i8xx_compute_dpll(crtc, crtc_state, NULL);
-
- return 0;
-}
-
-static int g4x_crtc_compute_clock(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- const struct intel_limit *limit;
- int refclk = 96000;
-
- memset(&crtc_state->dpll_hw_state, 0,
- sizeof(crtc_state->dpll_hw_state));
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
- if (intel_panel_use_ssc(dev_priv)) {
- refclk = dev_priv->vbt.lvds_ssc_freq;
- drm_dbg_kms(&dev_priv->drm,
- "using SSC reference clock of %d kHz\n",
- refclk);
- }
-
- if (intel_is_dual_link_lvds(dev_priv))
- limit = &intel_limits_g4x_dual_channel_lvds;
- else
- limit = &intel_limits_g4x_single_channel_lvds;
- } else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI) ||
- intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG)) {
- limit = &intel_limits_g4x_hdmi;
- } else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO)) {
- limit = &intel_limits_g4x_sdvo;
- } else {
- /* The option is for other outputs */
- limit = &intel_limits_i9xx_sdvo;
- }
-
- if (!crtc_state->clock_set &&
- !g4x_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
- refclk, NULL, &crtc_state->dpll)) {
- drm_err(&dev_priv->drm,
- "Couldn't find PLL settings for mode!\n");
- return -EINVAL;
- }
-
- i9xx_compute_dpll(crtc, crtc_state, NULL);
-
- return 0;
-}
-
-static int pnv_crtc_compute_clock(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state)
-{
- struct drm_device *dev = crtc->base.dev;
- struct drm_i915_private *dev_priv = to_i915(dev);
- const struct intel_limit *limit;
- int refclk = 96000;
-
- memset(&crtc_state->dpll_hw_state, 0,
- sizeof(crtc_state->dpll_hw_state));
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
- if (intel_panel_use_ssc(dev_priv)) {
- refclk = dev_priv->vbt.lvds_ssc_freq;
- drm_dbg_kms(&dev_priv->drm,
- "using SSC reference clock of %d kHz\n",
- refclk);
- }
-
- limit = &pnv_limits_lvds;
- } else {
- limit = &pnv_limits_sdvo;
- }
-
- if (!crtc_state->clock_set &&
- !pnv_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
- refclk, NULL, &crtc_state->dpll)) {
- drm_err(&dev_priv->drm,
- "Couldn't find PLL settings for mode!\n");
- return -EINVAL;
- }
-
- i9xx_compute_dpll(crtc, crtc_state, NULL);
-
- return 0;
-}
-
-static int i9xx_crtc_compute_clock(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state)
-{
- struct drm_device *dev = crtc->base.dev;
- struct drm_i915_private *dev_priv = to_i915(dev);
- const struct intel_limit *limit;
- int refclk = 96000;
-
- memset(&crtc_state->dpll_hw_state, 0,
- sizeof(crtc_state->dpll_hw_state));
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
- if (intel_panel_use_ssc(dev_priv)) {
- refclk = dev_priv->vbt.lvds_ssc_freq;
- drm_dbg_kms(&dev_priv->drm,
- "using SSC reference clock of %d kHz\n",
- refclk);
- }
-
- limit = &intel_limits_i9xx_lvds;
- } else {
- limit = &intel_limits_i9xx_sdvo;
- }
-
- if (!crtc_state->clock_set &&
- !i9xx_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
- refclk, NULL, &crtc_state->dpll)) {
- drm_err(&dev_priv->drm,
- "Couldn't find PLL settings for mode!\n");
- return -EINVAL;
- }
-
- i9xx_compute_dpll(crtc, crtc_state, NULL);
-
- return 0;
-}
-
-static int chv_crtc_compute_clock(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state)
-{
- int refclk = 100000;
- const struct intel_limit *limit = &intel_limits_chv;
- struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
-
- memset(&crtc_state->dpll_hw_state, 0,
- sizeof(crtc_state->dpll_hw_state));
-
- if (!crtc_state->clock_set &&
- !chv_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
- refclk, NULL, &crtc_state->dpll)) {
- drm_err(&i915->drm, "Couldn't find PLL settings for mode!\n");
- return -EINVAL;
- }
-
- chv_compute_dpll(crtc, crtc_state);
-
- return 0;
-}
-
-static int vlv_crtc_compute_clock(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state)
-{
- int refclk = 100000;
- const struct intel_limit *limit = &intel_limits_vlv;
- struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
-
- memset(&crtc_state->dpll_hw_state, 0,
- sizeof(crtc_state->dpll_hw_state));
-
- if (!crtc_state->clock_set &&
- !vlv_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
- refclk, NULL, &crtc_state->dpll)) {
- drm_err(&i915->drm, "Couldn't find PLL settings for mode!\n");
- return -EINVAL;
- }
-
- vlv_compute_dpll(crtc, crtc_state);
-
- return 0;
-}
static bool i9xx_has_pfit(struct drm_i915_private *dev_priv)
{
@@ -9882,172 +8730,6 @@ int ilk_get_lanes_required(int target_clock, int link_bw, int bpp)
return DIV_ROUND_UP(bps, link_bw * 8);
}
-static bool ilk_needs_fb_cb_tune(struct dpll *dpll, int factor)
-{
- return i9xx_dpll_compute_m(dpll) < factor * dpll->n;
-}
-
-static void ilk_compute_dpll(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state,
- struct dpll *reduced_clock)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- u32 dpll, fp, fp2;
- int factor;
-
- /* Enable autotuning of the PLL clock (if permissible) */
- factor = 21;
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
- if ((intel_panel_use_ssc(dev_priv) &&
- dev_priv->vbt.lvds_ssc_freq == 100000) ||
- (HAS_PCH_IBX(dev_priv) &&
- intel_is_dual_link_lvds(dev_priv)))
- factor = 25;
- } else if (crtc_state->sdvo_tv_clock) {
- factor = 20;
- }
-
- fp = i9xx_dpll_compute_fp(&crtc_state->dpll);
-
- if (ilk_needs_fb_cb_tune(&crtc_state->dpll, factor))
- fp |= FP_CB_TUNE;
-
- if (reduced_clock) {
- fp2 = i9xx_dpll_compute_fp(reduced_clock);
-
- if (reduced_clock->m < factor * reduced_clock->n)
- fp2 |= FP_CB_TUNE;
- } else {
- fp2 = fp;
- }
-
- dpll = 0;
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS))
- dpll |= DPLLB_MODE_LVDS;
- else
- dpll |= DPLLB_MODE_DAC_SERIAL;
-
- dpll |= (crtc_state->pixel_multiplier - 1)
- << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO) ||
- intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
- dpll |= DPLL_SDVO_HIGH_SPEED;
-
- if (intel_crtc_has_dp_encoder(crtc_state))
- dpll |= DPLL_SDVO_HIGH_SPEED;
-
- /*
- * The high speed IO clock is only really required for
- * SDVO/HDMI/DP, but we also enable it for CRT to make it
- * possible to share the DPLL between CRT and HDMI. Enabling
- * the clock needlessly does no real harm, except use up a
- * bit of power potentially.
- *
- * We'll limit this to IVB with 3 pipes, since it has only two
- * DPLLs and so DPLL sharing is the only way to get three pipes
- * driving PCH ports at the same time. On SNB we could do this,
- * and potentially avoid enabling the second DPLL, but it's not
- * clear if it''s a win or loss power wise. No point in doing
- * this on ILK at all since it has a fixed DPLL<->pipe mapping.
- */
- if (INTEL_NUM_PIPES(dev_priv) == 3 &&
- intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG))
- dpll |= DPLL_SDVO_HIGH_SPEED;
-
- /* compute bitmask from p1 value */
- dpll |= (1 << (crtc_state->dpll.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
- /* also FPA1 */
- dpll |= (1 << (crtc_state->dpll.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
-
- switch (crtc_state->dpll.p2) {
- case 5:
- dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
- break;
- case 7:
- dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
- break;
- case 10:
- dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
- break;
- case 14:
- dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
- break;
- }
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
- intel_panel_use_ssc(dev_priv))
- dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
- else
- dpll |= PLL_REF_INPUT_DREFCLK;
-
- dpll |= DPLL_VCO_ENABLE;
-
- crtc_state->dpll_hw_state.dpll = dpll;
- crtc_state->dpll_hw_state.fp0 = fp;
- crtc_state->dpll_hw_state.fp1 = fp2;
-}
-
-static int ilk_crtc_compute_clock(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- struct intel_atomic_state *state =
- to_intel_atomic_state(crtc_state->uapi.state);
- const struct intel_limit *limit;
- int refclk = 120000;
-
- memset(&crtc_state->dpll_hw_state, 0,
- sizeof(crtc_state->dpll_hw_state));
-
- /* CPU eDP is the only output that doesn't need a PCH PLL of its own. */
- if (!crtc_state->has_pch_encoder)
- return 0;
-
- if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
- if (intel_panel_use_ssc(dev_priv)) {
- drm_dbg_kms(&dev_priv->drm,
- "using SSC reference clock of %d kHz\n",
- dev_priv->vbt.lvds_ssc_freq);
- refclk = dev_priv->vbt.lvds_ssc_freq;
- }
-
- if (intel_is_dual_link_lvds(dev_priv)) {
- if (refclk == 100000)
- limit = &ilk_limits_dual_lvds_100m;
- else
- limit = &ilk_limits_dual_lvds;
- } else {
- if (refclk == 100000)
- limit = &ilk_limits_single_lvds_100m;
- else
- limit = &ilk_limits_single_lvds;
- }
- } else {
- limit = &ilk_limits_dac;
- }
-
- if (!crtc_state->clock_set &&
- !g4x_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
- refclk, NULL, &crtc_state->dpll)) {
- drm_err(&dev_priv->drm,
- "Couldn't find PLL settings for mode!\n");
- return -EINVAL;
- }
-
- ilk_compute_dpll(crtc, crtc_state, NULL);
-
- if (!intel_reserve_shared_dplls(state, crtc, NULL)) {
- drm_dbg_kms(&dev_priv->drm,
- "failed to find PLL for pipe %c\n",
- pipe_name(crtc->pipe));
- return -EINVAL;
- }
-
- return 0;
-}
-
static void intel_pch_transcoder_get_m_n(struct intel_crtc *crtc,
struct intel_link_m_n *m_n)
{
@@ -10460,29 +9142,6 @@ static bool ilk_get_pipe_config(struct intel_crtc *crtc,
return ret;
}
-static int hsw_crtc_compute_clock(struct intel_crtc *crtc,
- struct intel_crtc_state *crtc_state)
-{
- struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- struct intel_atomic_state *state =
- to_intel_atomic_state(crtc_state->uapi.state);
-
- if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) ||
- INTEL_GEN(dev_priv) >= 11) {
- struct intel_encoder *encoder =
- intel_get_crtc_new_encoder(state, crtc_state);
-
- if (!intel_reserve_shared_dplls(state, crtc, encoder)) {
- drm_dbg_kms(&dev_priv->drm,
- "failed to find PLL for pipe %c\n",
- pipe_name(crtc->pipe));
- return -EINVAL;
- }
- }
-
- return 0;
-}
-
static void dg1_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port,
struct intel_crtc_state *pipe_config)
{
@@ -16417,69 +15076,27 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv)
{
intel_init_cdclk_hooks(dev_priv);
+ intel_dpll_init_clock_hook(dev_priv);
+
if (INTEL_GEN(dev_priv) >= 9) {
dev_priv->display.get_pipe_config = hsw_get_pipe_config;
- dev_priv->display.get_initial_plane_config =
- skl_get_initial_plane_config;
- dev_priv->display.crtc_compute_clock = hsw_crtc_compute_clock;
dev_priv->display.crtc_enable = hsw_crtc_enable;
dev_priv->display.crtc_disable = hsw_crtc_disable;
} else if (HAS_DDI(dev_priv)) {
dev_priv->display.get_pipe_config = hsw_get_pipe_config;
- dev_priv->display.get_initial_plane_config =
- i9xx_get_initial_plane_config;
- dev_priv->display.crtc_compute_clock =
- hsw_crtc_compute_clock;
dev_priv->display.crtc_enable = hsw_crtc_enable;
dev_priv->display.crtc_disable = hsw_crtc_disable;
} else if (HAS_PCH_SPLIT(dev_priv)) {
dev_priv->display.get_pipe_config = ilk_get_pipe_config;
- dev_priv->display.get_initial_plane_config =
- i9xx_get_initial_plane_config;
- dev_priv->display.crtc_compute_clock =
- ilk_crtc_compute_clock;
dev_priv->display.crtc_enable = ilk_crtc_enable;
dev_priv->display.crtc_disable = ilk_crtc_disable;
- } else if (IS_CHERRYVIEW(dev_priv)) {
+ } else if (IS_CHERRYVIEW(dev_priv) ||
+ IS_VALLEYVIEW(dev_priv)) {
dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
- dev_priv->display.get_initial_plane_config =
- i9xx_get_initial_plane_config;
- dev_priv->display.crtc_compute_clock = chv_crtc_compute_clock;
dev_priv->display.crtc_enable = valleyview_crtc_enable;
dev_priv->display.crtc_disable = i9xx_crtc_disable;
- } else if (IS_VALLEYVIEW(dev_priv)) {
- dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
- dev_priv->display.get_initial_plane_config =
- i9xx_get_initial_plane_config;
- dev_priv->display.crtc_compute_clock = vlv_crtc_compute_clock;
- dev_priv->display.crtc_enable = valleyview_crtc_enable;
- dev_priv->display.crtc_disable = i9xx_crtc_disable;
- } else if (IS_G4X(dev_priv)) {
- dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
- dev_priv->display.get_initial_plane_config =
- i9xx_get_initial_plane_config;
- dev_priv->display.crtc_compute_clock = g4x_crtc_compute_clock;
- dev_priv->display.crtc_enable = i9xx_crtc_enable;
- dev_priv->display.crtc_disable = i9xx_crtc_disable;
- } else if (IS_PINEVIEW(dev_priv)) {
- dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
- dev_priv->display.get_initial_plane_config =
- i9xx_get_initial_plane_config;
- dev_priv->display.crtc_compute_clock = pnv_crtc_compute_clock;
- dev_priv->display.crtc_enable = i9xx_crtc_enable;
- dev_priv->display.crtc_disable = i9xx_crtc_disable;
- } else if (!IS_GEN(dev_priv, 2)) {
- dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
- dev_priv->display.get_initial_plane_config =
- i9xx_get_initial_plane_config;
- dev_priv->display.crtc_compute_clock = i9xx_crtc_compute_clock;
- dev_priv->display.crtc_enable = i9xx_crtc_enable;
- dev_priv->display.crtc_disable = i9xx_crtc_disable;
} else {
dev_priv->display.get_pipe_config = i9xx_get_pipe_config;
- dev_priv->display.get_initial_plane_config =
- i9xx_get_initial_plane_config;
- dev_priv->display.crtc_compute_clock = i8xx_crtc_compute_clock;
dev_priv->display.crtc_enable = i9xx_crtc_enable;
dev_priv->display.crtc_disable = i9xx_crtc_disable;
}
@@ -16493,10 +15110,13 @@ void intel_init_display_hooks(struct drm_i915_private *dev_priv)
dev_priv->display.fdi_link_train = ivb_manual_fdi_link_train;
}
- if (INTEL_GEN(dev_priv) >= 9)
+ if (INTEL_GEN(dev_priv) >= 9) {
dev_priv->display.commit_modeset_enables = skl_commit_modeset_enables;
- else
+ dev_priv->display.get_initial_plane_config = skl_get_initial_plane_config;
+ } else {
dev_priv->display.commit_modeset_enables = intel_commit_modeset_enables;
+ dev_priv->display.get_initial_plane_config = i9xx_get_initial_plane_config;
+ }
}
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index f7e49a39bd92..2e207a2f7a66 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -649,6 +649,9 @@ u32 intel_plane_compute_aligned_offset(int *x, int *y,
int color_plane);
int intel_plane_pin_fb(struct intel_plane_state *plane_state);
void intel_plane_unpin_fb(struct intel_plane_state *old_plane_state);
+struct intel_encoder *
+intel_get_crtc_new_encoder(const struct intel_atomic_state *state,
+ const struct intel_crtc_state *crtc_state);
/* modesetting */
void intel_modeset_init_hw(struct drm_i915_private *i915);
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index dfa3966e5fa1..37a9f304cb55 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -1811,4 +1811,17 @@ to_intel_frontbuffer(struct drm_framebuffer *fb)
return fb ? to_intel_framebuffer(fb)->frontbuffer : NULL;
}
+static inline bool intel_panel_use_ssc(struct drm_i915_private *dev_priv)
+{
+ if (dev_priv->params.panel_use_ssc >= 0)
+ return dev_priv->params.panel_use_ssc != 0;
+ return dev_priv->vbt.lvds_use_ssc
+ && !(dev_priv->quirks & QUIRK_LVDS_SSC_DISABLE);
+}
+
+static inline u32 i9xx_dpll_compute_fp(struct dpll *dpll)
+{
+ return dpll->n << 16 | dpll->m1 << 8 | dpll->m2;
+}
+
#endif /* __INTEL_DISPLAY_TYPES_H__ */
diff --git a/drivers/gpu/drm/i915/display/intel_dpll.c b/drivers/gpu/drm/i915/display/intel_dpll.c
new file mode 100644
index 000000000000..7ba7f315aaee
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_dpll.c
@@ -0,0 +1,1363 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+#include <linux/kernel.h>
+#include "intel_display_types.h"
+#include "intel_display.h"
+#include "intel_dpll.h"
+#include "intel_lvds.h"
+#include "intel_panel.h"
+
+struct intel_limit {
+ struct {
+ int min, max;
+ } dot, vco, n, m, m1, m2, p, p1;
+
+ struct {
+ int dot_limit;
+ int p2_slow, p2_fast;
+ } p2;
+};
+static const struct intel_limit intel_limits_i8xx_dac = {
+ .dot = { .min = 25000, .max = 350000 },
+ .vco = { .min = 908000, .max = 1512000 },
+ .n = { .min = 2, .max = 16 },
+ .m = { .min = 96, .max = 140 },
+ .m1 = { .min = 18, .max = 26 },
+ .m2 = { .min = 6, .max = 16 },
+ .p = { .min = 4, .max = 128 },
+ .p1 = { .min = 2, .max = 33 },
+ .p2 = { .dot_limit = 165000,
+ .p2_slow = 4, .p2_fast = 2 },
+};
+
+static const struct intel_limit intel_limits_i8xx_dvo = {
+ .dot = { .min = 25000, .max = 350000 },
+ .vco = { .min = 908000, .max = 1512000 },
+ .n = { .min = 2, .max = 16 },
+ .m = { .min = 96, .max = 140 },
+ .m1 = { .min = 18, .max = 26 },
+ .m2 = { .min = 6, .max = 16 },
+ .p = { .min = 4, .max = 128 },
+ .p1 = { .min = 2, .max = 33 },
+ .p2 = { .dot_limit = 165000,
+ .p2_slow = 4, .p2_fast = 4 },
+};
+
+static const struct intel_limit intel_limits_i8xx_lvds = {
+ .dot = { .min = 25000, .max = 350000 },
+ .vco = { .min = 908000, .max = 1512000 },
+ .n = { .min = 2, .max = 16 },
+ .m = { .min = 96, .max = 140 },
+ .m1 = { .min = 18, .max = 26 },
+ .m2 = { .min = 6, .max = 16 },
+ .p = { .min = 4, .max = 128 },
+ .p1 = { .min = 1, .max = 6 },
+ .p2 = { .dot_limit = 165000,
+ .p2_slow = 14, .p2_fast = 7 },
+};
+
+static const struct intel_limit intel_limits_i9xx_sdvo = {
+ .dot = { .min = 20000, .max = 400000 },
+ .vco = { .min = 1400000, .max = 2800000 },
+ .n = { .min = 1, .max = 6 },
+ .m = { .min = 70, .max = 120 },
+ .m1 = { .min = 8, .max = 18 },
+ .m2 = { .min = 3, .max = 7 },
+ .p = { .min = 5, .max = 80 },
+ .p1 = { .min = 1, .max = 8 },
+ .p2 = { .dot_limit = 200000,
+ .p2_slow = 10, .p2_fast = 5 },
+};
+
+static const struct intel_limit intel_limits_i9xx_lvds = {
+ .dot = { .min = 20000, .max = 400000 },
+ .vco = { .min = 1400000, .max = 2800000 },
+ .n = { .min = 1, .max = 6 },
+ .m = { .min = 70, .max = 120 },
+ .m1 = { .min = 8, .max = 18 },
+ .m2 = { .min = 3, .max = 7 },
+ .p = { .min = 7, .max = 98 },
+ .p1 = { .min = 1, .max = 8 },
+ .p2 = { .dot_limit = 112000,
+ .p2_slow = 14, .p2_fast = 7 },
+};
+
+
+static const struct intel_limit intel_limits_g4x_sdvo = {
+ .dot = { .min = 25000, .max = 270000 },
+ .vco = { .min = 1750000, .max = 3500000},
+ .n = { .min = 1, .max = 4 },
+ .m = { .min = 104, .max = 138 },
+ .m1 = { .min = 17, .max = 23 },
+ .m2 = { .min = 5, .max = 11 },
+ .p = { .min = 10, .max = 30 },
+ .p1 = { .min = 1, .max = 3},
+ .p2 = { .dot_limit = 270000,
+ .p2_slow = 10,
+ .p2_fast = 10
+ },
+};
+
+static const struct intel_limit intel_limits_g4x_hdmi = {
+ .dot = { .min = 22000, .max = 400000 },
+ .vco = { .min = 1750000, .max = 3500000},
+ .n = { .min = 1, .max = 4 },
+ .m = { .min = 104, .max = 138 },
+ .m1 = { .min = 16, .max = 23 },
+ .m2 = { .min = 5, .max = 11 },
+ .p = { .min = 5, .max = 80 },
+ .p1 = { .min = 1, .max = 8},
+ .p2 = { .dot_limit = 165000,
+ .p2_slow = 10, .p2_fast = 5 },
+};
+
+static const struct intel_limit intel_limits_g4x_single_channel_lvds = {
+ .dot = { .min = 20000, .max = 115000 },
+ .vco = { .min = 1750000, .max = 3500000 },
+ .n = { .min = 1, .max = 3 },
+ .m = { .min = 104, .max = 138 },
+ .m1 = { .min = 17, .max = 23 },
+ .m2 = { .min = 5, .max = 11 },
+ .p = { .min = 28, .max = 112 },
+ .p1 = { .min = 2, .max = 8 },
+ .p2 = { .dot_limit = 0,
+ .p2_slow = 14, .p2_fast = 14
+ },
+};
+
+static const struct intel_limit intel_limits_g4x_dual_channel_lvds = {
+ .dot = { .min = 80000, .max = 224000 },
+ .vco = { .min = 1750000, .max = 3500000 },
+ .n = { .min = 1, .max = 3 },
+ .m = { .min = 104, .max = 138 },
+ .m1 = { .min = 17, .max = 23 },
+ .m2 = { .min = 5, .max = 11 },
+ .p = { .min = 14, .max = 42 },
+ .p1 = { .min = 2, .max = 6 },
+ .p2 = { .dot_limit = 0,
+ .p2_slow = 7, .p2_fast = 7
+ },
+};
+
+static const struct intel_limit pnv_limits_sdvo = {
+ .dot = { .min = 20000, .max = 400000},
+ .vco = { .min = 1700000, .max = 3500000 },
+ /* Pineview's Ncounter is a ring counter */
+ .n = { .min = 3, .max = 6 },
+ .m = { .min = 2, .max = 256 },
+ /* Pineview only has one combined m divider, which we treat as m2. */
+ .m1 = { .min = 0, .max = 0 },
+ .m2 = { .min = 0, .max = 254 },
+ .p = { .min = 5, .max = 80 },
+ .p1 = { .min = 1, .max = 8 },
+ .p2 = { .dot_limit = 200000,
+ .p2_slow = 10, .p2_fast = 5 },
+};
+
+static const struct intel_limit pnv_limits_lvds = {
+ .dot = { .min = 20000, .max = 400000 },
+ .vco = { .min = 1700000, .max = 3500000 },
+ .n = { .min = 3, .max = 6 },
+ .m = { .min = 2, .max = 256 },
+ .m1 = { .min = 0, .max = 0 },
+ .m2 = { .min = 0, .max = 254 },
+ .p = { .min = 7, .max = 112 },
+ .p1 = { .min = 1, .max = 8 },
+ .p2 = { .dot_limit = 112000,
+ .p2_slow = 14, .p2_fast = 14 },
+};
+
+/* Ironlake / Sandybridge
+ *
+ * We calculate clock using (register_value + 2) for N/M1/M2, so here
+ * the range value for them is (actual_value - 2).
+ */
+static const struct intel_limit ilk_limits_dac = {
+ .dot = { .min = 25000, .max = 350000 },
+ .vco = { .min = 1760000, .max = 3510000 },
+ .n = { .min = 1, .max = 5 },
+ .m = { .min = 79, .max = 127 },
+ .m1 = { .min = 12, .max = 22 },
+ .m2 = { .min = 5, .max = 9 },
+ .p = { .min = 5, .max = 80 },
+ .p1 = { .min = 1, .max = 8 },
+ .p2 = { .dot_limit = 225000,
+ .p2_slow = 10, .p2_fast = 5 },
+};
+
+static const struct intel_limit ilk_limits_single_lvds = {
+ .dot = { .min = 25000, .max = 350000 },
+ .vco = { .min = 1760000, .max = 3510000 },
+ .n = { .min = 1, .max = 3 },
+ .m = { .min = 79, .max = 118 },
+ .m1 = { .min = 12, .max = 22 },
+ .m2 = { .min = 5, .max = 9 },
+ .p = { .min = 28, .max = 112 },
+ .p1 = { .min = 2, .max = 8 },
+ .p2 = { .dot_limit = 225000,
+ .p2_slow = 14, .p2_fast = 14 },
+};
+
+static const struct intel_limit ilk_limits_dual_lvds = {
+ .dot = { .min = 25000, .max = 350000 },
+ .vco = { .min = 1760000, .max = 3510000 },
+ .n = { .min = 1, .max = 3 },
+ .m = { .min = 79, .max = 127 },
+ .m1 = { .min = 12, .max = 22 },
+ .m2 = { .min = 5, .max = 9 },
+ .p = { .min = 14, .max = 56 },
+ .p1 = { .min = 2, .max = 8 },
+ .p2 = { .dot_limit = 225000,
+ .p2_slow = 7, .p2_fast = 7 },
+};
+
+/* LVDS 100mhz refclk limits. */
+static const struct intel_limit ilk_limits_single_lvds_100m = {
+ .dot = { .min = 25000, .max = 350000 },
+ .vco = { .min = 1760000, .max = 3510000 },
+ .n = { .min = 1, .max = 2 },
+ .m = { .min = 79, .max = 126 },
+ .m1 = { .min = 12, .max = 22 },
+ .m2 = { .min = 5, .max = 9 },
+ .p = { .min = 28, .max = 112 },
+ .p1 = { .min = 2, .max = 8 },
+ .p2 = { .dot_limit = 225000,
+ .p2_slow = 14, .p2_fast = 14 },
+};
+
+static const struct intel_limit ilk_limits_dual_lvds_100m = {
+ .dot = { .min = 25000, .max = 350000 },
+ .vco = { .min = 1760000, .max = 3510000 },
+ .n = { .min = 1, .max = 3 },
+ .m = { .min = 79, .max = 126 },
+ .m1 = { .min = 12, .max = 22 },
+ .m2 = { .min = 5, .max = 9 },
+ .p = { .min = 14, .max = 42 },
+ .p1 = { .min = 2, .max = 6 },
+ .p2 = { .dot_limit = 225000,
+ .p2_slow = 7, .p2_fast = 7 },
+};
+
+static const struct intel_limit intel_limits_vlv = {
+ /*
+ * These are the data rate limits (measured in fast clocks)
+ * since those are the strictest limits we have. The fast
+ * clock and actual rate limits are more relaxed, so checking
+ * them would make no difference.
+ */
+ .dot = { .min = 25000 * 5, .max = 270000 * 5 },
+ .vco = { .min = 4000000, .max = 6000000 },
+ .n = { .min = 1, .max = 7 },
+ .m1 = { .min = 2, .max = 3 },
+ .m2 = { .min = 11, .max = 156 },
+ .p1 = { .min = 2, .max = 3 },
+ .p2 = { .p2_slow = 2, .p2_fast = 20 }, /* slow=min, fast=max */
+};
+
+static const struct intel_limit intel_limits_chv = {
+ /*
+ * These are the data rate limits (measured in fast clocks)
+ * since those are the strictest limits we have. The fast
+ * clock and actual rate limits are more relaxed, so checking
+ * them would make no difference.
+ */
+ .dot = { .min = 25000 * 5, .max = 540000 * 5},
+ .vco = { .min = 4800000, .max = 6480000 },
+ .n = { .min = 1, .max = 1 },
+ .m1 = { .min = 2, .max = 2 },
+ .m2 = { .min = 24 << 22, .max = 175 << 22 },
+ .p1 = { .min = 2, .max = 4 },
+ .p2 = { .p2_slow = 1, .p2_fast = 14 },
+};
+
+static const struct intel_limit intel_limits_bxt = {
+ /* FIXME: find real dot limits */
+ .dot = { .min = 0, .max = INT_MAX },
+ .vco = { .min = 4800000, .max = 6700000 },
+ .n = { .min = 1, .max = 1 },
+ .m1 = { .min = 2, .max = 2 },
+ /* FIXME: find real m2 limits */
+ .m2 = { .min = 2 << 22, .max = 255 << 22 },
+ .p1 = { .min = 2, .max = 4 },
+ .p2 = { .p2_slow = 1, .p2_fast = 20 },
+};
+
+/*
+ * Platform specific helpers to calculate the port PLL loopback- (clock.m),
+ * and post-divider (clock.p) values, pre- (clock.vco) and post-divided fast
+ * (clock.dot) clock rates. This fast dot clock is fed to the port's IO logic.
+ * The helpers' return value is the rate of the clock that is fed to the
+ * display engine's pipe which can be the above fast dot clock rate or a
+ * divided-down version of it.
+ */
+/* m1 is reserved as 0 in Pineview, n is a ring counter */
+int pnv_calc_dpll_params(int refclk, struct dpll *clock)
+{
+ clock->m = clock->m2 + 2;
+ clock->p = clock->p1 * clock->p2;
+ if (WARN_ON(clock->n == 0 || clock->p == 0))
+ return 0;
+ clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n);
+ clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
+
+ return clock->dot;
+}
+
+static u32 i9xx_dpll_compute_m(struct dpll *dpll)
+{
+ return 5 * (dpll->m1 + 2) + (dpll->m2 + 2);
+}
+
+int i9xx_calc_dpll_params(int refclk, struct dpll *clock)
+{
+ clock->m = i9xx_dpll_compute_m(clock);
+ clock->p = clock->p1 * clock->p2;
+ if (WARN_ON(clock->n + 2 == 0 || clock->p == 0))
+ return 0;
+ clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n + 2);
+ clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
+
+ return clock->dot;
+}
+
+int vlv_calc_dpll_params(int refclk, struct dpll *clock)
+{
+ clock->m = clock->m1 * clock->m2;
+ clock->p = clock->p1 * clock->p2;
+ if (WARN_ON(clock->n == 0 || clock->p == 0))
+ return 0;
+ clock->vco = DIV_ROUND_CLOSEST(refclk * clock->m, clock->n);
+ clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
+
+ return clock->dot / 5;
+}
+
+int chv_calc_dpll_params(int refclk, struct dpll *clock)
+{
+ clock->m = clock->m1 * clock->m2;
+ clock->p = clock->p1 * clock->p2;
+ if (WARN_ON(clock->n == 0 || clock->p == 0))
+ return 0;
+ clock->vco = DIV_ROUND_CLOSEST_ULL(mul_u32_u32(refclk, clock->m),
+ clock->n << 22);
+ clock->dot = DIV_ROUND_CLOSEST(clock->vco, clock->p);
+
+ return clock->dot / 5;
+}
+
+/*
+ * Returns whether the given set of divisors are valid for a given refclk with
+ * the given connectors.
+ */
+static bool intel_pll_is_valid(struct drm_i915_private *dev_priv,
+ const struct intel_limit *limit,
+ const struct dpll *clock)
+{
+ if (clock->n < limit->n.min || limit->n.max < clock->n)
+ return false;
+ if (clock->p1 < limit->p1.min || limit->p1.max < clock->p1)
+ return false;
+ if (clock->m2 < limit->m2.min || limit->m2.max < clock->m2)
+ return false;
+ if (clock->m1 < limit->m1.min || limit->m1.max < clock->m1)
+ return false;
+
+ if (!IS_PINEVIEW(dev_priv) && !IS_VALLEYVIEW(dev_priv) &&
+ !IS_CHERRYVIEW(dev_priv) && !IS_GEN9_LP(dev_priv))
+ if (clock->m1 <= clock->m2)
+ return false;
+
+ if (!IS_VALLEYVIEW(dev_priv) && !IS_CHERRYVIEW(dev_priv) &&
+ !IS_GEN9_LP(dev_priv)) {
+ if (clock->p < limit->p.min || limit->p.max < clock->p)
+ return false;
+ if (clock->m < limit->m.min || limit->m.max < clock->m)
+ return false;
+ }
+
+ if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
+ return false;
+ /* XXX: We may need to be checking "Dot clock" depending on the multiplier,
+ * connector, etc., rather than just a single range.
+ */
+ if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
+ return false;
+
+ return true;
+}
+
+static int
+i9xx_select_p2_div(const struct intel_limit *limit,
+ const struct intel_crtc_state *crtc_state,
+ int target)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+ /*
+ * For LVDS just rely on its current settings for dual-channel.
+ * We haven't figured out how to reliably set up different
+ * single/dual channel state, if we even can.
+ */
+ if (intel_is_dual_link_lvds(dev_priv))
+ return limit->p2.p2_fast;
+ else
+ return limit->p2.p2_slow;
+ } else {
+ if (target < limit->p2.dot_limit)
+ return limit->p2.p2_slow;
+ else
+ return limit->p2.p2_fast;
+ }
+}
+
+/*
+ * Returns a set of divisors for the desired target clock with the given
+ * refclk, or FALSE. The returned values represent the clock equation:
+ * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
+ *
+ * Target and reference clocks are specified in kHz.
+ *
+ * If match_clock is provided, then best_clock P divider must match the P
+ * divider from @match_clock used for LVDS downclocking.
+ */
+static bool
+i9xx_find_best_dpll(const struct intel_limit *limit,
+ struct intel_crtc_state *crtc_state,
+ int target, int refclk, struct dpll *match_clock,
+ struct dpll *best_clock)
+{
+ struct drm_device *dev = crtc_state->uapi.crtc->dev;
+ struct dpll clock;
+ int err = target;
+
+ memset(best_clock, 0, sizeof(*best_clock));
+
+ clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
+
+ for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
+ clock.m1++) {
+ for (clock.m2 = limit->m2.min;
+ clock.m2 <= limit->m2.max; clock.m2++) {
+ if (clock.m2 >= clock.m1)
+ break;
+ for (clock.n = limit->n.min;
+ clock.n <= limit->n.max; clock.n++) {
+ for (clock.p1 = limit->p1.min;
+ clock.p1 <= limit->p1.max; clock.p1++) {
+ int this_err;
+
+ i9xx_calc_dpll_params(refclk, &clock);
+ if (!intel_pll_is_valid(to_i915(dev),
+ limit,
+ &clock))
+ continue;
+ if (match_clock &&
+ clock.p != match_clock->p)
+ continue;
+
+ this_err = abs(clock.dot - target);
+ if (this_err < err) {
+ *best_clock = clock;
+ err = this_err;
+ }
+ }
+ }
+ }
+ }
+
+ return (err != target);
+}
+
+/*
+ * Returns a set of divisors for the desired target clock with the given
+ * refclk, or FALSE. The returned values represent the clock equation:
+ * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
+ *
+ * Target and reference clocks are specified in kHz.
+ *
+ * If match_clock is provided, then best_clock P divider must match the P
+ * divider from @match_clock used for LVDS downclocking.
+ */
+static bool
+pnv_find_best_dpll(const struct intel_limit *limit,
+ struct intel_crtc_state *crtc_state,
+ int target, int refclk, struct dpll *match_clock,
+ struct dpll *best_clock)
+{
+ struct drm_device *dev = crtc_state->uapi.crtc->dev;
+ struct dpll clock;
+ int err = target;
+
+ memset(best_clock, 0, sizeof(*best_clock));
+
+ clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
+
+ for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max;
+ clock.m1++) {
+ for (clock.m2 = limit->m2.min;
+ clock.m2 <= limit->m2.max; clock.m2++) {
+ for (clock.n = limit->n.min;
+ clock.n <= limit->n.max; clock.n++) {
+ for (clock.p1 = limit->p1.min;
+ clock.p1 <= limit->p1.max; clock.p1++) {
+ int this_err;
+
+ pnv_calc_dpll_params(refclk, &clock);
+ if (!intel_pll_is_valid(to_i915(dev),
+ limit,
+ &clock))
+ continue;
+ if (match_clock &&
+ clock.p != match_clock->p)
+ continue;
+
+ this_err = abs(clock.dot - target);
+ if (this_err < err) {
+ *best_clock = clock;
+ err = this_err;
+ }
+ }
+ }
+ }
+ }
+
+ return (err != target);
+}
+
+/*
+ * Returns a set of divisors for the desired target clock with the given
+ * refclk, or FALSE. The returned values represent the clock equation:
+ * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
+ *
+ * Target and reference clocks are specified in kHz.
+ *
+ * If match_clock is provided, then best_clock P divider must match the P
+ * divider from @match_clock used for LVDS downclocking.
+ */
+static bool
+g4x_find_best_dpll(const struct intel_limit *limit,
+ struct intel_crtc_state *crtc_state,
+ int target, int refclk, struct dpll *match_clock,
+ struct dpll *best_clock)
+{
+ struct drm_device *dev = crtc_state->uapi.crtc->dev;
+ struct dpll clock;
+ int max_n;
+ bool found = false;
+ /* approximately equals target * 0.00585 */
+ int err_most = (target >> 8) + (target >> 9);
+
+ memset(best_clock, 0, sizeof(*best_clock));
+
+ clock.p2 = i9xx_select_p2_div(limit, crtc_state, target);
+
+ max_n = limit->n.max;
+ /* based on hardware requirement, prefer smaller n to precision */
+ for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
+ /* based on hardware requirement, prefere larger m1,m2 */
+ for (clock.m1 = limit->m1.max;
+ clock.m1 >= limit->m1.min; clock.m1--) {
+ for (clock.m2 = limit->m2.max;
+ clock.m2 >= limit->m2.min; clock.m2--) {
+ for (clock.p1 = limit->p1.max;
+ clock.p1 >= limit->p1.min; clock.p1--) {
+ int this_err;
+
+ i9xx_calc_dpll_params(refclk, &clock);
+ if (!intel_pll_is_valid(to_i915(dev),
+ limit,
+ &clock))
+ continue;
+
+ this_err = abs(clock.dot - target);
+ if (this_err < err_most) {
+ *best_clock = clock;
+ err_most = this_err;
+ max_n = clock.n;
+ found = true;
+ }
+ }
+ }
+ }
+ }
+ return found;
+}
+
+/*
+ * Check if the calculated PLL configuration is more optimal compared to the
+ * best configuration and error found so far. Return the calculated error.
+ */
+static bool vlv_PLL_is_optimal(struct drm_device *dev, int target_freq,
+ const struct dpll *calculated_clock,
+ const struct dpll *best_clock,
+ unsigned int best_error_ppm,
+ unsigned int *error_ppm)
+{
+ /*
+ * For CHV ignore the error and consider only the P value.
+ * Prefer a bigger P value based on HW requirements.
+ */
+ if (IS_CHERRYVIEW(to_i915(dev))) {
+ *error_ppm = 0;
+
+ return calculated_clock->p > best_clock->p;
+ }
+
+ if (drm_WARN_ON_ONCE(dev, !target_freq))
+ return false;
+
+ *error_ppm = div_u64(1000000ULL *
+ abs(target_freq - calculated_clock->dot),
+ target_freq);
+ /*
+ * Prefer a better P value over a better (smaller) error if the error
+ * is small. Ensure this preference for future configurations too by
+ * setting the error to 0.
+ */
+ if (*error_ppm < 100 && calculated_clock->p > best_clock->p) {
+ *error_ppm = 0;
+
+ return true;
+ }
+
+ return *error_ppm + 10 < best_error_ppm;
+}
+
+/*
+ * Returns a set of divisors for the desired target clock with the given
+ * refclk, or FALSE. The returned values represent the clock equation:
+ * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
+ */
+static bool
+vlv_find_best_dpll(const struct intel_limit *limit,
+ struct intel_crtc_state *crtc_state,
+ int target, int refclk, struct dpll *match_clock,
+ struct dpll *best_clock)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_device *dev = crtc->base.dev;
+ struct dpll clock;
+ unsigned int bestppm = 1000000;
+ /* min update 19.2 MHz */
+ int max_n = min(limit->n.max, refclk / 19200);
+ bool found = false;
+
+ target *= 5; /* fast clock */
+
+ memset(best_clock, 0, sizeof(*best_clock));
+
+ /* based on hardware requirement, prefer smaller n to precision */
+ for (clock.n = limit->n.min; clock.n <= max_n; clock.n++) {
+ for (clock.p1 = limit->p1.max; clock.p1 >= limit->p1.min; clock.p1--) {
+ for (clock.p2 = limit->p2.p2_fast; clock.p2 >= limit->p2.p2_slow;
+ clock.p2 -= clock.p2 > 10 ? 2 : 1) {
+ clock.p = clock.p1 * clock.p2;
+ /* based on hardware requirement, prefer bigger m1,m2 values */
+ for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max; clock.m1++) {
+ unsigned int ppm;
+
+ clock.m2 = DIV_ROUND_CLOSEST(target * clock.p * clock.n,
+ refclk * clock.m1);
+
+ vlv_calc_dpll_params(refclk, &clock);
+
+ if (!intel_pll_is_valid(to_i915(dev),
+ limit,
+ &clock))
+ continue;
+
+ if (!vlv_PLL_is_optimal(dev, target,
+ &clock,
+ best_clock,
+ bestppm, &ppm))
+ continue;
+
+ *best_clock = clock;
+ bestppm = ppm;
+ found = true;
+ }
+ }
+ }
+ }
+
+ return found;
+}
+
+/*
+ * Returns a set of divisors for the desired target clock with the given
+ * refclk, or FALSE. The returned values represent the clock equation:
+ * reflck * (5 * (m1 + 2) + (m2 + 2)) / (n + 2) / p1 / p2.
+ */
+static bool
+chv_find_best_dpll(const struct intel_limit *limit,
+ struct intel_crtc_state *crtc_state,
+ int target, int refclk, struct dpll *match_clock,
+ struct dpll *best_clock)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_device *dev = crtc->base.dev;
+ unsigned int best_error_ppm;
+ struct dpll clock;
+ u64 m2;
+ int found = false;
+
+ memset(best_clock, 0, sizeof(*best_clock));
+ best_error_ppm = 1000000;
+
+ /*
+ * Based on hardware doc, the n always set to 1, and m1 always
+ * set to 2. If requires to support 200Mhz refclk, we need to
+ * revisit this because n may not 1 anymore.
+ */
+ clock.n = 1;
+ clock.m1 = 2;
+ target *= 5; /* fast clock */
+
+ for (clock.p1 = limit->p1.max; clock.p1 >= limit->p1.min; clock.p1--) {
+ for (clock.p2 = limit->p2.p2_fast;
+ clock.p2 >= limit->p2.p2_slow;
+ clock.p2 -= clock.p2 > 10 ? 2 : 1) {
+ unsigned int error_ppm;
+
+ clock.p = clock.p1 * clock.p2;
+
+ m2 = DIV_ROUND_CLOSEST_ULL(mul_u32_u32(target, clock.p * clock.n) << 22,
+ refclk * clock.m1);
+
+ if (m2 > INT_MAX/clock.m1)
+ continue;
+
+ clock.m2 = m2;
+
+ chv_calc_dpll_params(refclk, &clock);
+
+ if (!intel_pll_is_valid(to_i915(dev), limit, &clock))
+ continue;
+
+ if (!vlv_PLL_is_optimal(dev, target, &clock, best_clock,
+ best_error_ppm, &error_ppm))
+ continue;
+
+ *best_clock = clock;
+ best_error_ppm = error_ppm;
+ found = true;
+ }
+ }
+
+ return found;
+}
+
+bool bxt_find_best_dpll(struct intel_crtc_state *crtc_state,
+ struct dpll *best_clock)
+{
+ int refclk = 100000;
+ const struct intel_limit *limit = &intel_limits_bxt;
+
+ return chv_find_best_dpll(limit, crtc_state,
+ crtc_state->port_clock, refclk,
+ NULL, best_clock);
+}
+
+static u32 pnv_dpll_compute_fp(struct dpll *dpll)
+{
+ return (1 << dpll->n) << 16 | dpll->m2;
+}
+
+static void i9xx_update_pll_dividers(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state,
+ struct dpll *reduced_clock)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ u32 fp, fp2 = 0;
+
+ if (IS_PINEVIEW(dev_priv)) {
+ fp = pnv_dpll_compute_fp(&crtc_state->dpll);
+ if (reduced_clock)
+ fp2 = pnv_dpll_compute_fp(reduced_clock);
+ } else {
+ fp = i9xx_dpll_compute_fp(&crtc_state->dpll);
+ if (reduced_clock)
+ fp2 = i9xx_dpll_compute_fp(reduced_clock);
+ }
+
+ crtc_state->dpll_hw_state.fp0 = fp;
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
+ reduced_clock) {
+ crtc_state->dpll_hw_state.fp1 = fp2;
+ } else {
+ crtc_state->dpll_hw_state.fp1 = fp;
+ }
+}
+
+static void i9xx_compute_dpll(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state,
+ struct dpll *reduced_clock)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ u32 dpll;
+ struct dpll *clock = &crtc_state->dpll;
+
+ i9xx_update_pll_dividers(crtc, crtc_state, reduced_clock);
+
+ dpll = DPLL_VGA_MODE_DIS;
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS))
+ dpll |= DPLLB_MODE_LVDS;
+ else
+ dpll |= DPLLB_MODE_DAC_SERIAL;
+
+ if (IS_I945G(dev_priv) || IS_I945GM(dev_priv) ||
+ IS_G33(dev_priv) || IS_PINEVIEW(dev_priv)) {
+ dpll |= (crtc_state->pixel_multiplier - 1)
+ << SDVO_MULTIPLIER_SHIFT_HIRES;
+ }
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO) ||
+ intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
+ dpll |= DPLL_SDVO_HIGH_SPEED;
+
+ if (intel_crtc_has_dp_encoder(crtc_state))
+ dpll |= DPLL_SDVO_HIGH_SPEED;
+
+ /* compute bitmask from p1 value */
+ if (IS_PINEVIEW(dev_priv))
+ dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW;
+ else {
+ dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
+ if (IS_G4X(dev_priv) && reduced_clock)
+ dpll |= (1 << (reduced_clock->p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
+ }
+ switch (clock->p2) {
+ case 5:
+ dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
+ break;
+ case 7:
+ dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
+ break;
+ case 10:
+ dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
+ break;
+ case 14:
+ dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
+ break;
+ }
+ if (INTEL_GEN(dev_priv) >= 4)
+ dpll |= (6 << PLL_LOAD_PULSE_PHASE_SHIFT);
+
+ if (crtc_state->sdvo_tv_clock)
+ dpll |= PLL_REF_INPUT_TVCLKINBC;
+ else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
+ intel_panel_use_ssc(dev_priv))
+ dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
+ else
+ dpll |= PLL_REF_INPUT_DREFCLK;
+
+ dpll |= DPLL_VCO_ENABLE;
+ crtc_state->dpll_hw_state.dpll = dpll;
+
+ if (INTEL_GEN(dev_priv) >= 4) {
+ u32 dpll_md = (crtc_state->pixel_multiplier - 1)
+ << DPLL_MD_UDI_MULTIPLIER_SHIFT;
+ crtc_state->dpll_hw_state.dpll_md = dpll_md;
+ }
+}
+
+static void i8xx_compute_dpll(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state,
+ struct dpll *reduced_clock)
+{
+ struct drm_device *dev = crtc->base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ u32 dpll;
+ struct dpll *clock = &crtc_state->dpll;
+
+ i9xx_update_pll_dividers(crtc, crtc_state, reduced_clock);
+
+ dpll = DPLL_VGA_MODE_DIS;
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+ dpll |= (1 << (clock->p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
+ } else {
+ if (clock->p1 == 2)
+ dpll |= PLL_P1_DIVIDE_BY_TWO;
+ else
+ dpll |= (clock->p1 - 2) << DPLL_FPA01_P1_POST_DIV_SHIFT;
+ if (clock->p2 == 4)
+ dpll |= PLL_P2_DIVIDE_BY_4;
+ }
+
+ /*
+ * Bspec:
+ * "[Almador Errata}: For the correct operation of the muxed DVO pins
+ * (GDEVSELB/I2Cdata, GIRDBY/I2CClk) and (GFRAMEB/DVI_Data,
+ * GTRDYB/DVI_Clk): Bit 31 (DPLL VCO Enable) and Bit 30 (2X Clock
+ * Enable) must be set to “1” in both the DPLL A Control Register
+ * (06014h-06017h) and DPLL B Control Register (06018h-0601Bh)."
+ *
+ * For simplicity We simply keep both bits always enabled in
+ * both DPLLS. The spec says we should disable the DVO 2X clock
+ * when not needed, but this seems to work fine in practice.
+ */
+ if (IS_I830(dev_priv) ||
+ intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DVO))
+ dpll |= DPLL_DVO_2X_MODE;
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
+ intel_panel_use_ssc(dev_priv))
+ dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
+ else
+ dpll |= PLL_REF_INPUT_DREFCLK;
+
+ dpll |= DPLL_VCO_ENABLE;
+ crtc_state->dpll_hw_state.dpll = dpll;
+}
+
+static int hsw_crtc_compute_clock(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ struct intel_atomic_state *state =
+ to_intel_atomic_state(crtc_state->uapi.state);
+
+ if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DSI) ||
+ INTEL_GEN(dev_priv) >= 11) {
+ struct intel_encoder *encoder =
+ intel_get_crtc_new_encoder(state, crtc_state);
+
+ if (!intel_reserve_shared_dplls(state, crtc, encoder)) {
+ drm_dbg_kms(&dev_priv->drm,
+ "failed to find PLL for pipe %c\n",
+ pipe_name(crtc->pipe));
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
+static bool ilk_needs_fb_cb_tune(struct dpll *dpll, int factor)
+{
+ return i9xx_dpll_compute_m(dpll) < factor * dpll->n;
+}
+
+
+static void ilk_compute_dpll(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state,
+ struct dpll *reduced_clock)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ u32 dpll, fp, fp2;
+ int factor;
+
+ /* Enable autotuning of the PLL clock (if permissible) */
+ factor = 21;
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+ if ((intel_panel_use_ssc(dev_priv) &&
+ dev_priv->vbt.lvds_ssc_freq == 100000) ||
+ (HAS_PCH_IBX(dev_priv) &&
+ intel_is_dual_link_lvds(dev_priv)))
+ factor = 25;
+ } else if (crtc_state->sdvo_tv_clock) {
+ factor = 20;
+ }
+
+ fp = i9xx_dpll_compute_fp(&crtc_state->dpll);
+
+ if (ilk_needs_fb_cb_tune(&crtc_state->dpll, factor))
+ fp |= FP_CB_TUNE;
+
+ if (reduced_clock) {
+ fp2 = i9xx_dpll_compute_fp(reduced_clock);
+
+ if (reduced_clock->m < factor * reduced_clock->n)
+ fp2 |= FP_CB_TUNE;
+ } else {
+ fp2 = fp;
+ }
+
+ dpll = 0;
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS))
+ dpll |= DPLLB_MODE_LVDS;
+ else
+ dpll |= DPLLB_MODE_DAC_SERIAL;
+
+ dpll |= (crtc_state->pixel_multiplier - 1)
+ << PLL_REF_SDVO_HDMI_MULTIPLIER_SHIFT;
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO) ||
+ intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI))
+ dpll |= DPLL_SDVO_HIGH_SPEED;
+
+ if (intel_crtc_has_dp_encoder(crtc_state))
+ dpll |= DPLL_SDVO_HIGH_SPEED;
+
+ /*
+ * The high speed IO clock is only really required for
+ * SDVO/HDMI/DP, but we also enable it for CRT to make it
+ * possible to share the DPLL between CRT and HDMI. Enabling
+ * the clock needlessly does no real harm, except use up a
+ * bit of power potentially.
+ *
+ * We'll limit this to IVB with 3 pipes, since it has only two
+ * DPLLs and so DPLL sharing is the only way to get three pipes
+ * driving PCH ports at the same time. On SNB we could do this,
+ * and potentially avoid enabling the second DPLL, but it's not
+ * clear if it''s a win or loss power wise. No point in doing
+ * this on ILK at all since it has a fixed DPLL<->pipe mapping.
+ */
+ if (INTEL_NUM_PIPES(dev_priv) == 3 &&
+ intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG))
+ dpll |= DPLL_SDVO_HIGH_SPEED;
+
+ /* compute bitmask from p1 value */
+ dpll |= (1 << (crtc_state->dpll.p1 - 1)) << DPLL_FPA01_P1_POST_DIV_SHIFT;
+ /* also FPA1 */
+ dpll |= (1 << (crtc_state->dpll.p1 - 1)) << DPLL_FPA1_P1_POST_DIV_SHIFT;
+
+ switch (crtc_state->dpll.p2) {
+ case 5:
+ dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_5;
+ break;
+ case 7:
+ dpll |= DPLLB_LVDS_P2_CLOCK_DIV_7;
+ break;
+ case 10:
+ dpll |= DPLL_DAC_SERIAL_P2_CLOCK_DIV_10;
+ break;
+ case 14:
+ dpll |= DPLLB_LVDS_P2_CLOCK_DIV_14;
+ break;
+ }
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS) &&
+ intel_panel_use_ssc(dev_priv))
+ dpll |= PLLB_REF_INPUT_SPREADSPECTRUMIN;
+ else
+ dpll |= PLL_REF_INPUT_DREFCLK;
+
+ dpll |= DPLL_VCO_ENABLE;
+
+ crtc_state->dpll_hw_state.dpll = dpll;
+ crtc_state->dpll_hw_state.fp0 = fp;
+ crtc_state->dpll_hw_state.fp1 = fp2;
+}
+
+static int ilk_crtc_compute_clock(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ struct intel_atomic_state *state =
+ to_intel_atomic_state(crtc_state->uapi.state);
+ const struct intel_limit *limit;
+ int refclk = 120000;
+
+ memset(&crtc_state->dpll_hw_state, 0,
+ sizeof(crtc_state->dpll_hw_state));
+
+ /* CPU eDP is the only output that doesn't need a PCH PLL of its own. */
+ if (!crtc_state->has_pch_encoder)
+ return 0;
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+ if (intel_panel_use_ssc(dev_priv)) {
+ drm_dbg_kms(&dev_priv->drm,
+ "using SSC reference clock of %d kHz\n",
+ dev_priv->vbt.lvds_ssc_freq);
+ refclk = dev_priv->vbt.lvds_ssc_freq;
+ }
+
+ if (intel_is_dual_link_lvds(dev_priv)) {
+ if (refclk == 100000)
+ limit = &ilk_limits_dual_lvds_100m;
+ else
+ limit = &ilk_limits_dual_lvds;
+ } else {
+ if (refclk == 100000)
+ limit = &ilk_limits_single_lvds_100m;
+ else
+ limit = &ilk_limits_single_lvds;
+ }
+ } else {
+ limit = &ilk_limits_dac;
+ }
+
+ if (!crtc_state->clock_set &&
+ !g4x_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+ refclk, NULL, &crtc_state->dpll)) {
+ drm_err(&dev_priv->drm,
+ "Couldn't find PLL settings for mode!\n");
+ return -EINVAL;
+ }
+
+ ilk_compute_dpll(crtc, crtc_state, NULL);
+
+ if (!intel_reserve_shared_dplls(state, crtc, NULL)) {
+ drm_dbg_kms(&dev_priv->drm,
+ "failed to find PLL for pipe %c\n",
+ pipe_name(crtc->pipe));
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+void vlv_compute_dpll(struct intel_crtc *crtc,
+ struct intel_crtc_state *pipe_config)
+{
+ pipe_config->dpll_hw_state.dpll = DPLL_INTEGRATED_REF_CLK_VLV |
+ DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
+ if (crtc->pipe != PIPE_A)
+ pipe_config->dpll_hw_state.dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
+
+ /* DPLL not used with DSI, but still need the rest set up */
+ if (!intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DSI))
+ pipe_config->dpll_hw_state.dpll |= DPLL_VCO_ENABLE |
+ DPLL_EXT_BUFFER_ENABLE_VLV;
+
+ pipe_config->dpll_hw_state.dpll_md =
+ (pipe_config->pixel_multiplier - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
+}
+
+void chv_compute_dpll(struct intel_crtc *crtc,
+ struct intel_crtc_state *pipe_config)
+{
+ pipe_config->dpll_hw_state.dpll = DPLL_SSC_REF_CLK_CHV |
+ DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS;
+ if (crtc->pipe != PIPE_A)
+ pipe_config->dpll_hw_state.dpll |= DPLL_INTEGRATED_CRI_CLK_VLV;
+
+ /* DPLL not used with DSI, but still need the rest set up */
+ if (!intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DSI))
+ pipe_config->dpll_hw_state.dpll |= DPLL_VCO_ENABLE;
+
+ pipe_config->dpll_hw_state.dpll_md =
+ (pipe_config->pixel_multiplier - 1) << DPLL_MD_UDI_MULTIPLIER_SHIFT;
+}
+
+static int chv_crtc_compute_clock(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state)
+{
+ int refclk = 100000;
+ const struct intel_limit *limit = &intel_limits_chv;
+ struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+
+ memset(&crtc_state->dpll_hw_state, 0,
+ sizeof(crtc_state->dpll_hw_state));
+
+ if (!crtc_state->clock_set &&
+ !chv_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+ refclk, NULL, &crtc_state->dpll)) {
+ drm_err(&i915->drm, "Couldn't find PLL settings for mode!\n");
+ return -EINVAL;
+ }
+
+ chv_compute_dpll(crtc, crtc_state);
+
+ return 0;
+}
+
+static int vlv_crtc_compute_clock(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state)
+{
+ int refclk = 100000;
+ const struct intel_limit *limit = &intel_limits_vlv;
+ struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
+
+ memset(&crtc_state->dpll_hw_state, 0,
+ sizeof(crtc_state->dpll_hw_state));
+
+ if (!crtc_state->clock_set &&
+ !vlv_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+ refclk, NULL, &crtc_state->dpll)) {
+ drm_err(&i915->drm, "Couldn't find PLL settings for mode!\n");
+ return -EINVAL;
+ }
+
+ vlv_compute_dpll(crtc, crtc_state);
+
+ return 0;
+}
+
+static int g4x_crtc_compute_clock(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ const struct intel_limit *limit;
+ int refclk = 96000;
+
+ memset(&crtc_state->dpll_hw_state, 0,
+ sizeof(crtc_state->dpll_hw_state));
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+ if (intel_panel_use_ssc(dev_priv)) {
+ refclk = dev_priv->vbt.lvds_ssc_freq;
+ drm_dbg_kms(&dev_priv->drm,
+ "using SSC reference clock of %d kHz\n",
+ refclk);
+ }
+
+ if (intel_is_dual_link_lvds(dev_priv))
+ limit = &intel_limits_g4x_dual_channel_lvds;
+ else
+ limit = &intel_limits_g4x_single_channel_lvds;
+ } else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI) ||
+ intel_crtc_has_type(crtc_state, INTEL_OUTPUT_ANALOG)) {
+ limit = &intel_limits_g4x_hdmi;
+ } else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_SDVO)) {
+ limit = &intel_limits_g4x_sdvo;
+ } else {
+ /* The option is for other outputs */
+ limit = &intel_limits_i9xx_sdvo;
+ }
+
+ if (!crtc_state->clock_set &&
+ !g4x_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+ refclk, NULL, &crtc_state->dpll)) {
+ drm_err(&dev_priv->drm,
+ "Couldn't find PLL settings for mode!\n");
+ return -EINVAL;
+ }
+
+ i9xx_compute_dpll(crtc, crtc_state, NULL);
+
+ return 0;
+}
+
+static int pnv_crtc_compute_clock(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state)
+{
+ struct drm_device *dev = crtc->base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ const struct intel_limit *limit;
+ int refclk = 96000;
+
+ memset(&crtc_state->dpll_hw_state, 0,
+ sizeof(crtc_state->dpll_hw_state));
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+ if (intel_panel_use_ssc(dev_priv)) {
+ refclk = dev_priv->vbt.lvds_ssc_freq;
+ drm_dbg_kms(&dev_priv->drm,
+ "using SSC reference clock of %d kHz\n",
+ refclk);
+ }
+
+ limit = &pnv_limits_lvds;
+ } else {
+ limit = &pnv_limits_sdvo;
+ }
+
+ if (!crtc_state->clock_set &&
+ !pnv_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+ refclk, NULL, &crtc_state->dpll)) {
+ drm_err(&dev_priv->drm,
+ "Couldn't find PLL settings for mode!\n");
+ return -EINVAL;
+ }
+
+ i9xx_compute_dpll(crtc, crtc_state, NULL);
+
+ return 0;
+}
+
+static int i9xx_crtc_compute_clock(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state)
+{
+ struct drm_device *dev = crtc->base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ const struct intel_limit *limit;
+ int refclk = 96000;
+
+ memset(&crtc_state->dpll_hw_state, 0,
+ sizeof(crtc_state->dpll_hw_state));
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+ if (intel_panel_use_ssc(dev_priv)) {
+ refclk = dev_priv->vbt.lvds_ssc_freq;
+ drm_dbg_kms(&dev_priv->drm,
+ "using SSC reference clock of %d kHz\n",
+ refclk);
+ }
+
+ limit = &intel_limits_i9xx_lvds;
+ } else {
+ limit = &intel_limits_i9xx_sdvo;
+ }
+
+ if (!crtc_state->clock_set &&
+ !i9xx_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+ refclk, NULL, &crtc_state->dpll)) {
+ drm_err(&dev_priv->drm,
+ "Couldn't find PLL settings for mode!\n");
+ return -EINVAL;
+ }
+
+ i9xx_compute_dpll(crtc, crtc_state, NULL);
+
+ return 0;
+}
+
+static int i8xx_crtc_compute_clock(struct intel_crtc *crtc,
+ struct intel_crtc_state *crtc_state)
+{
+ struct drm_device *dev = crtc->base.dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ const struct intel_limit *limit;
+ int refclk = 48000;
+
+ memset(&crtc_state->dpll_hw_state, 0,
+ sizeof(crtc_state->dpll_hw_state));
+
+ if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_LVDS)) {
+ if (intel_panel_use_ssc(dev_priv)) {
+ refclk = dev_priv->vbt.lvds_ssc_freq;
+ drm_dbg_kms(&dev_priv->drm,
+ "using SSC reference clock of %d kHz\n",
+ refclk);
+ }
+
+ limit = &intel_limits_i8xx_lvds;
+ } else if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_DVO)) {
+ limit = &intel_limits_i8xx_dvo;
+ } else {
+ limit = &intel_limits_i8xx_dac;
+ }
+
+ if (!crtc_state->clock_set &&
+ !i9xx_find_best_dpll(limit, crtc_state, crtc_state->port_clock,
+ refclk, NULL, &crtc_state->dpll)) {
+ drm_err(&dev_priv->drm,
+ "Couldn't find PLL settings for mode!\n");
+ return -EINVAL;
+ }
+
+ i8xx_compute_dpll(crtc, crtc_state, NULL);
+
+ return 0;
+}
+
+void
+intel_dpll_init_clock_hook(struct drm_i915_private *dev_priv)
+{
+ if (INTEL_GEN(dev_priv) >= 9 || HAS_DDI(dev_priv))
+ dev_priv->display.crtc_compute_clock = hsw_crtc_compute_clock;
+ else if (HAS_PCH_SPLIT(dev_priv))
+ dev_priv->display.crtc_compute_clock = ilk_crtc_compute_clock;
+ else if (IS_CHERRYVIEW(dev_priv))
+ dev_priv->display.crtc_compute_clock = chv_crtc_compute_clock;
+ else if (IS_VALLEYVIEW(dev_priv))
+ dev_priv->display.crtc_compute_clock = vlv_crtc_compute_clock;
+ else if (IS_G4X(dev_priv))
+ dev_priv->display.crtc_compute_clock = g4x_crtc_compute_clock;
+ else if (IS_PINEVIEW(dev_priv))
+ dev_priv->display.crtc_compute_clock = pnv_crtc_compute_clock;
+ else if (!IS_GEN(dev_priv, 2))
+ dev_priv->display.crtc_compute_clock = i9xx_crtc_compute_clock;
+ else
+ dev_priv->display.crtc_compute_clock = i8xx_crtc_compute_clock;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_dpll.h b/drivers/gpu/drm/i915/display/intel_dpll.h
new file mode 100644
index 000000000000..caf4615092e1
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_dpll.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2020 Intel Corporation
+ */
+
+#ifndef _INTEL_DPLL_H_
+#define _INTEL_DPLL_H_
+
+struct dpll;
+struct drm_i915_private;
+struct intel_crtc;
+struct intel_crtc_state;
+
+void intel_dpll_init_clock_hook(struct drm_i915_private *dev_priv);
+int vlv_calc_dpll_params(int refclk, struct dpll *clock);
+int pnv_calc_dpll_params(int refclk, struct dpll *clock);
+int i9xx_calc_dpll_params(int refclk, struct dpll *clock);
+void vlv_compute_dpll(struct intel_crtc *crtc,
+ struct intel_crtc_state *pipe_config);
+void chv_compute_dpll(struct intel_crtc *crtc,
+ struct intel_crtc_state *pipe_config);
+
+#endif
--
2.27.0
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