[Intel-gfx] [PATCH 08/15] drm/i915: Extract icl+ .{enable, disable}_clock() vfuncs
Ville Syrjala
ville.syrjala at linux.intel.com
Mon Feb 1 18:33:36 UTC 2021
From: Ville Syrjälä <ville.syrjala at linux.intel.com>
For ICL+ we have several styles of clock routing for DDIs:
1) TC DDI + TC PHY
-> needs DDI_CLK_SEL==MG/TBT part form intel_ddi_clk_{select,disable}()
and ICL_DPCLKA_CFGCR0_TC_CLK_OFF part form icl_{map,unmap}_plls_to_ports()
2) ICL/TGL combo DDI + combo PHY
-> just need the stuff from icl_{map,unmap}_plls_to_ports()
3) JSL/EHL TC DDI + combo PHY
-> needs DDI_CLK_SEL==MG part from intel_ddi_clk_{select,disable}() and
the full combo style clock selection from icl_{map,unmap}_plls_to_ports()
4) ADLS/RKL
-> these use both TC and combo DDIs with combo PHYs, however they
always use the full combo style clock selection as per
icl_{map,unmap}_plls_to_ports() and do not use DDI_CLK_SEL at all,
thus get treated the same as 2)
We extract all that from the current mess in the following way:
1) icl_ddi_tc_{enable,disable}_clock()
2) icl_ddi_combo_{enable,disable}_clock()
3) jsl_ddi_tc_{enable,disable}_clock()
4) for now we reuse icl_ddi_combo_{enable,disable}_clock() here
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 149 +++++++++++++++--------
1 file changed, 95 insertions(+), 54 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 39cbaa03d261..aac85e86d776 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3205,8 +3205,8 @@ static void dg1_ddi_disable_clock(struct intel_encoder *encoder)
mutex_unlock(&dev_priv->dpll.lock);
}
-static void icl_map_plls_to_ports(struct intel_encoder *encoder,
- const struct intel_crtc_state *crtc_state)
+static void icl_ddi_combo_enable_clock(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_shared_dpll *pll = crtc_state->shared_dpll;
@@ -3220,22 +3220,20 @@ static void icl_map_plls_to_ports(struct intel_encoder *encoder,
drm_WARN_ON(&dev_priv->drm,
(val & icl_dpclka_cfgcr0_clk_off(dev_priv, phy)) == 0);
- if (intel_phy_is_combo(dev_priv, phy)) {
- /*
- * Even though this register references DDIs, note that we
- * want to pass the PHY rather than the port (DDI). For
- * ICL, port=phy in all cases so it doesn't matter, but for
- * EHL the bspec notes the following:
- *
- * "DDID clock tied to DDIA clock, so DPCLKA_CFGCR0 DDIA
- * Clock Select chooses the PLL for both DDIA and DDID and
- * drives port A in all cases."
- */
- val &= ~icl_dpclka_cfgcr0_clk_sel_mask(dev_priv, phy);
- val |= icl_dpclka_cfgcr0_clk_sel(dev_priv, pll->info->id, phy);
- intel_de_write(dev_priv, reg, val);
- intel_de_posting_read(dev_priv, reg);
- }
+ /*
+ * Even though this register references DDIs, note that we
+ * want to pass the PHY rather than the port (DDI). For
+ * ICL, port=phy in all cases so it doesn't matter, but for
+ * EHL the bspec notes the following:
+ *
+ * "DDID clock tied to DDIA clock, so DPCLKA_CFGCR0 DDIA
+ * Clock Select chooses the PLL for both DDIA and DDID and
+ * drives port A in all cases."
+ */
+ val &= ~icl_dpclka_cfgcr0_clk_sel_mask(dev_priv, phy);
+ val |= icl_dpclka_cfgcr0_clk_sel(dev_priv, pll->info->id, phy);
+ intel_de_write(dev_priv, reg, val);
+ intel_de_posting_read(dev_priv, reg);
val &= ~icl_dpclka_cfgcr0_clk_off(dev_priv, phy);
intel_de_write(dev_priv, reg, val);
@@ -3243,7 +3241,7 @@ static void icl_map_plls_to_ports(struct intel_encoder *encoder,
mutex_unlock(&dev_priv->dpll.lock);
}
-static void icl_unmap_plls_to_ports(struct intel_encoder *encoder)
+static void icl_ddi_combo_disable_clock(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
@@ -3382,47 +3380,71 @@ void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder)
icl_sanitize_port_clk_off(dev_priv, port_mask, ddi_clk_needed);
}
-static void intel_ddi_clk_select(struct intel_encoder *encoder,
- const struct intel_crtc_state *crtc_state)
+static void jsl_ddi_tc_enable_clock(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ const struct intel_shared_dpll *pll = crtc_state->shared_dpll;
enum port port = encoder->port;
- enum phy phy = intel_port_to_phy(dev_priv, port);
+
+ if (drm_WARN_ON(&dev_priv->drm, !pll))
+ return;
+
+ /*
+ * "For DDIC and DDID, program DDI_CLK_SEL to map the MG clock to the port.
+ * MG does not exist, but the programming is required to ungate DDIC and DDID."
+ */
+ intel_de_write(dev_priv, DDI_CLK_SEL(port), DDI_CLK_SEL_MG);
+
+ icl_ddi_combo_enable_clock(encoder, crtc_state);
+}
+
+static void jsl_ddi_tc_disable_clock(struct intel_encoder *encoder)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ enum port port = encoder->port;
+
+ icl_ddi_combo_disable_clock(encoder);
+
+ intel_de_write(dev_priv, DDI_CLK_SEL(port), DDI_CLK_SEL_NONE);
+}
+
+static void icl_ddi_tc_enable_clock(struct intel_encoder *encoder,
+ const struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
const struct intel_shared_dpll *pll = crtc_state->shared_dpll;
+ enum tc_port tc_port = intel_port_to_tc(dev_priv, encoder->port);
+ enum port port = encoder->port;
if (drm_WARN_ON(&dev_priv->drm, !pll))
return;
+ intel_de_write(dev_priv, DDI_CLK_SEL(port),
+ icl_pll_to_ddi_clk_sel(encoder, crtc_state));
+
mutex_lock(&dev_priv->dpll.lock);
- if (INTEL_GEN(dev_priv) >= 11) {
- if (!intel_phy_is_combo(dev_priv, phy))
- intel_de_write(dev_priv, DDI_CLK_SEL(port),
- icl_pll_to_ddi_clk_sel(encoder, crtc_state));
- else if (IS_JSL_EHL(dev_priv) && port >= PORT_C)
- /*
- * MG does not exist but the programming is required
- * to ungate DDIC and DDID
- */
- intel_de_write(dev_priv, DDI_CLK_SEL(port),
- DDI_CLK_SEL_MG);
- }
+ intel_de_rmw(dev_priv, ICL_DPCLKA_CFGCR0,
+ ICL_DPCLKA_CFGCR0_TC_CLK_OFF(tc_port), 0);
mutex_unlock(&dev_priv->dpll.lock);
}
-static void intel_ddi_clk_disable(struct intel_encoder *encoder)
+static void icl_ddi_tc_disable_clock(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+ enum tc_port tc_port = intel_port_to_tc(dev_priv, encoder->port);
enum port port = encoder->port;
- enum phy phy = intel_port_to_phy(dev_priv, port);
-
- if (INTEL_GEN(dev_priv) >= 11) {
- if (!intel_phy_is_combo(dev_priv, phy) ||
- (IS_JSL_EHL(dev_priv) && port >= PORT_C))
- intel_de_write(dev_priv, DDI_CLK_SEL(port),
- DDI_CLK_SEL_NONE);
- }
+
+ mutex_lock(&dev_priv->dpll.lock);
+
+ intel_de_rmw(dev_priv, ICL_DPCLKA_CFGCR0,
+ 0, ICL_DPCLKA_CFGCR0_TC_CLK_OFF(tc_port));
+
+ mutex_unlock(&dev_priv->dpll.lock);
+
+ intel_de_write(dev_priv, DDI_CLK_SEL(port), DDI_CLK_SEL_NONE);
}
static void cnl_ddi_enable_clock(struct intel_encoder *encoder,
@@ -3523,16 +3545,12 @@ static void intel_ddi_enable_clock(struct intel_encoder *encoder,
{
if (encoder->enable_clock)
encoder->enable_clock(encoder, crtc_state);
- else
- intel_ddi_clk_select(encoder, crtc_state);
}
static void intel_ddi_disable_clock(struct intel_encoder *encoder)
{
if (encoder->disable_clock)
encoder->disable_clock(encoder);
- else
- intel_ddi_clk_disable(encoder);
}
static void
@@ -4014,9 +4032,6 @@ static void intel_ddi_pre_enable(struct intel_atomic_state *state,
drm_WARN_ON(&dev_priv->drm, crtc_state->has_pch_encoder);
- if (!IS_DG1(dev_priv) && INTEL_GEN(dev_priv) >= 11)
- icl_map_plls_to_ports(encoder, crtc_state);
-
intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true);
if (intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI)) {
@@ -4215,9 +4230,6 @@ static void intel_ddi_post_disable(struct intel_atomic_state *state,
intel_ddi_post_disable_dp(state, encoder, old_crtc_state,
old_conn_state);
- if (!IS_DG1(dev_priv) && INTEL_GEN(dev_priv) >= 11)
- icl_unmap_plls_to_ports(encoder);
-
if (intel_crtc_has_dp_encoder(old_crtc_state) || is_tc_port)
intel_display_power_put(dev_priv,
intel_ddi_main_link_aux_domain(dig_port),
@@ -5556,6 +5568,16 @@ static enum hpd_pin cnl_hpd_pin(struct drm_i915_private *dev_priv,
return HPD_PORT_A + port - PORT_A;
}
+static bool intel_ddi_is_tc(struct drm_i915_private *i915, enum port port)
+{
+ if (INTEL_GEN(i915) >= 12)
+ return port >= PORT_TC1;
+ else if (INTEL_GEN(i915) >= 11)
+ return port >= PORT_C;
+ else
+ return false;
+}
+
#define port_tc_name(port) ((port) - PORT_TC1 + '1')
#define tc_port_name(tc_port) ((tc_port) - TC_PORT_1 + '1')
@@ -5660,9 +5682,28 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
encoder->cloneable = 0;
encoder->pipe_mask = ~0;
- if (IS_DG1(dev_priv)) {
+ if (IS_ALDERLAKE_S(dev_priv) || IS_ROCKETLAKE(dev_priv)) {
+ encoder->enable_clock = icl_ddi_combo_enable_clock;
+ encoder->disable_clock = icl_ddi_combo_disable_clock;
+ } else if (IS_DG1(dev_priv)) {
encoder->enable_clock = dg1_ddi_enable_clock;
encoder->disable_clock = dg1_ddi_disable_clock;
+ } else if (IS_JSL_EHL(dev_priv)) {
+ if (intel_ddi_is_tc(dev_priv, port)) {
+ encoder->enable_clock = jsl_ddi_tc_enable_clock;
+ encoder->disable_clock = jsl_ddi_tc_disable_clock;
+ } else {
+ encoder->enable_clock = icl_ddi_combo_enable_clock;
+ encoder->disable_clock = icl_ddi_combo_disable_clock;
+ }
+ } else if (INTEL_GEN(dev_priv) >= 11) {
+ if (intel_ddi_is_tc(dev_priv, port)) {
+ encoder->enable_clock = icl_ddi_tc_enable_clock;
+ encoder->disable_clock = icl_ddi_tc_disable_clock;
+ } else {
+ encoder->enable_clock = icl_ddi_combo_enable_clock;
+ encoder->disable_clock = icl_ddi_combo_disable_clock;
+ }
} else if (IS_CANNONLAKE(dev_priv)) {
encoder->enable_clock = cnl_ddi_enable_clock;
encoder->disable_clock = cnl_ddi_disable_clock;
--
2.26.2
More information about the Intel-gfx
mailing list