[Intel-gfx] [PATCH 11/16] drm/i915: Compute DSI PLL parameters during .compute_config()
ville.syrjala at linux.intel.com
ville.syrjala at linux.intel.com
Tue Mar 15 14:40:04 UTC 2016
From: Ville Syrjälä <ville.syrjala at linux.intel.com>
Compute the DSI PLL parameters during .compute_config() rather than
.pre_pll_enable() so that we can fail gracefully if we can't find
suitable parameters.
In order to do that we need to store the DSI PLL parameters in
pipe_config.
v2: Handle BXT too
Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
drivers/gpu/drm/i915/intel_display.c | 3 +
drivers/gpu/drm/i915/intel_drv.h | 5 ++
drivers/gpu/drm/i915/intel_dsi.c | 15 ++--
drivers/gpu/drm/i915/intel_dsi.h | 14 ++--
drivers/gpu/drm/i915/intel_dsi_pll.c | 155 +++++++++++++++++++----------------
5 files changed, 112 insertions(+), 80 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 3e6b5fb140ad..d0b7fc85bc3a 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12757,6 +12757,9 @@ intel_pipe_config_compare(struct drm_device *dev,
PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr1);
PIPE_CONF_CHECK_X(dpll_hw_state.cfgcr2);
+ PIPE_CONF_CHECK_X(dsi_pll.ctrl);
+ PIPE_CONF_CHECK_X(dsi_pll.div);
+
if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5)
PIPE_CONF_CHECK_I(pipe_bpp);
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 02b3d22862a1..89229037436d 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -495,6 +495,11 @@ struct intel_crtc_state {
/* Actual register state of the dpll, for shared dpll cross-checking. */
struct intel_dpll_hw_state dpll_hw_state;
+ /* DSI PLL registers */
+ struct {
+ u32 ctrl, div;
+ } dsi_pll;
+
int pipe_bpp;
struct intel_link_m_n dp_m_n;
diff --git a/drivers/gpu/drm/i915/intel_dsi.c b/drivers/gpu/drm/i915/intel_dsi.c
index 787411e1c36f..1b4e83df4560 100644
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -273,6 +273,7 @@ static bool intel_dsi_compute_config(struct intel_encoder *encoder,
struct intel_connector *intel_connector = intel_dsi->attached_connector;
struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
+ int ret;
DRM_DEBUG_KMS("\n");
@@ -284,10 +285,10 @@ static bool intel_dsi_compute_config(struct intel_encoder *encoder,
/* DSI uses short packets for sync events, so clear mode flags for DSI */
adjusted_mode->flags = 0;
- /*
- * FIXME move the DSI PLL calc from vlv_enable_dsi_pll()
- * to .compute_config().
- */
+ ret = intel_compute_dsi_pll(encoder, pipe_config);
+ if (ret)
+ return false;
+
pipe_config->clock_set = true;
return true;
@@ -477,6 +478,7 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder)
struct drm_device *dev = encoder->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+ struct intel_crtc *crtc = to_intel_crtc(encoder->base.crtc);
enum port port;
u32 tmp;
@@ -487,7 +489,7 @@ static void intel_dsi_pre_enable(struct intel_encoder *encoder)
* lock. It needs to be fully powered down to fix it.
*/
intel_disable_dsi_pll(encoder);
- intel_enable_dsi_pll(encoder);
+ intel_enable_dsi_pll(encoder, crtc->config);
intel_dsi_prepare(encoder);
@@ -715,7 +717,8 @@ static void intel_dsi_get_config(struct intel_encoder *encoder,
pipe_config->has_dsi_encoder = true;
- pclk = intel_dsi_get_pclk(encoder, pipe_config->pipe_bpp);
+ pclk = intel_dsi_get_pclk(encoder, pipe_config->pipe_bpp,
+ pipe_config);
if (!pclk)
return;
diff --git a/drivers/gpu/drm/i915/intel_dsi.h b/drivers/gpu/drm/i915/intel_dsi.h
index 92f39227b361..e94c07170bf6 100644
--- a/drivers/gpu/drm/i915/intel_dsi.h
+++ b/drivers/gpu/drm/i915/intel_dsi.h
@@ -126,11 +126,15 @@ static inline struct intel_dsi *enc_to_intel_dsi(struct drm_encoder *encoder)
return container_of(encoder, struct intel_dsi, base.base);
}
-extern void intel_enable_dsi_pll(struct intel_encoder *encoder);
-extern void intel_disable_dsi_pll(struct intel_encoder *encoder);
-extern u32 intel_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp);
-extern void intel_dsi_reset_clocks(struct intel_encoder *encoder,
- enum port port);
+int intel_compute_dsi_pll(struct intel_encoder *encoder,
+ struct intel_crtc_state *config);
+void intel_enable_dsi_pll(struct intel_encoder *encoder,
+ const struct intel_crtc_state *config);
+void intel_disable_dsi_pll(struct intel_encoder *encoder);
+u32 intel_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp,
+ struct intel_crtc_state *config);
+void intel_dsi_reset_clocks(struct intel_encoder *encoder,
+ enum port port);
struct drm_panel *vbt_panel_init(struct intel_dsi *intel_dsi, u16 panel_id);
diff --git a/drivers/gpu/drm/i915/intel_dsi_pll.c b/drivers/gpu/drm/i915/intel_dsi_pll.c
index 978cc2668a3d..d35c8dc28fb6 100644
--- a/drivers/gpu/drm/i915/intel_dsi_pll.c
+++ b/drivers/gpu/drm/i915/intel_dsi_pll.c
@@ -51,10 +51,6 @@ int dsi_pixel_format_bpp(int pixel_format)
return bpp;
}
-struct dsi_mnp {
- u32 dsi_pll_ctrl;
- u32 dsi_pll_div;
-};
static const u16 lfsr_converts[] = {
426, 469, 234, 373, 442, 221, 110, 311, 411, /* 62 - 70 */
@@ -77,7 +73,8 @@ static u32 dsi_clk_from_pclk(u32 pclk, int pixel_format, int lane_count)
}
static int dsi_calc_mnp(struct drm_i915_private *dev_priv,
- struct dsi_mnp *dsi_mnp, int target_dsi_clk)
+ struct intel_crtc_state *config,
+ int target_dsi_clk)
{
unsigned int calc_m = 0, calc_p = 0;
unsigned int m_min, m_max, p_min = 2, p_max = 6;
@@ -123,8 +120,8 @@ static int dsi_calc_mnp(struct drm_i915_private *dev_priv,
/* register has log2(N1), this works fine for powers of two */
n = ffs(n) - 1;
m_seed = lfsr_converts[calc_m - 62];
- dsi_mnp->dsi_pll_ctrl = 1 << (DSI_PLL_P1_POST_DIV_SHIFT + calc_p - 2);
- dsi_mnp->dsi_pll_div = n << DSI_PLL_N1_DIV_SHIFT |
+ config->dsi_pll.ctrl = 1 << (DSI_PLL_P1_POST_DIV_SHIFT + calc_p - 2);
+ config->dsi_pll.div = n << DSI_PLL_N1_DIV_SHIFT |
m_seed << DSI_PLL_M1_DIV_SHIFT;
return 0;
@@ -134,54 +131,63 @@ static int dsi_calc_mnp(struct drm_i915_private *dev_priv,
* XXX: The muxing and gating is hard coded for now. Need to add support for
* sharing PLLs with two DSI outputs.
*/
-static void vlv_configure_dsi_pll(struct intel_encoder *encoder)
+static int vlv_compute_dsi_pll(struct intel_encoder *encoder,
+ struct intel_crtc_state *config)
{
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int ret;
- struct dsi_mnp dsi_mnp;
u32 dsi_clk;
dsi_clk = dsi_clk_from_pclk(intel_dsi->pclk, intel_dsi->pixel_format,
intel_dsi->lane_count);
- ret = dsi_calc_mnp(dev_priv, &dsi_mnp, dsi_clk);
+ ret = dsi_calc_mnp(dev_priv, config, dsi_clk);
if (ret) {
DRM_DEBUG_KMS("dsi_calc_mnp failed\n");
- return;
+ return ret;
}
if (intel_dsi->ports & (1 << PORT_A))
- dsi_mnp.dsi_pll_ctrl |= DSI_PLL_CLK_GATE_DSI0_DSIPLL;
+ config->dsi_pll.ctrl |= DSI_PLL_CLK_GATE_DSI0_DSIPLL;
if (intel_dsi->ports & (1 << PORT_C))
- dsi_mnp.dsi_pll_ctrl |= DSI_PLL_CLK_GATE_DSI1_DSIPLL;
+ config->dsi_pll.ctrl |= DSI_PLL_CLK_GATE_DSI1_DSIPLL;
+
+ config->dsi_pll.ctrl |= DSI_PLL_VCO_EN;
DRM_DEBUG_KMS("dsi pll div %08x, ctrl %08x\n",
- dsi_mnp.dsi_pll_div, dsi_mnp.dsi_pll_ctrl);
+ config->dsi_pll.div, config->dsi_pll.ctrl);
+
+ return 0;
+}
+
+static void vlv_configure_dsi_pll(struct intel_encoder *encoder,
+ const struct intel_crtc_state *config)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
vlv_cck_write(dev_priv, CCK_REG_DSI_PLL_CONTROL, 0);
- vlv_cck_write(dev_priv, CCK_REG_DSI_PLL_DIVIDER, dsi_mnp.dsi_pll_div);
- vlv_cck_write(dev_priv, CCK_REG_DSI_PLL_CONTROL, dsi_mnp.dsi_pll_ctrl);
+ vlv_cck_write(dev_priv, CCK_REG_DSI_PLL_DIVIDER, config->dsi_pll.div);
+ vlv_cck_write(dev_priv, CCK_REG_DSI_PLL_CONTROL,
+ config->dsi_pll.ctrl & ~DSI_PLL_VCO_EN);
}
-static void vlv_enable_dsi_pll(struct intel_encoder *encoder)
+static void vlv_enable_dsi_pll(struct intel_encoder *encoder,
+ const struct intel_crtc_state *config)
{
- struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
- u32 tmp;
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
DRM_DEBUG_KMS("\n");
mutex_lock(&dev_priv->sb_lock);
- vlv_configure_dsi_pll(encoder);
+ vlv_configure_dsi_pll(encoder, config);
/* wait at least 0.5 us after ungating before enabling VCO */
usleep_range(1, 10);
- tmp = vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_CONTROL);
- tmp |= DSI_PLL_VCO_EN;
- vlv_cck_write(dev_priv, CCK_REG_DSI_PLL_CONTROL, tmp);
+ vlv_cck_write(dev_priv, CCK_REG_DSI_PLL_CONTROL, config->dsi_pll.ctrl);
if (wait_for(vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_CONTROL) &
DSI_PLL_LOCK, 20)) {
@@ -197,7 +203,7 @@ static void vlv_enable_dsi_pll(struct intel_encoder *encoder)
static void vlv_disable_dsi_pll(struct intel_encoder *encoder)
{
- struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
u32 tmp;
DRM_DEBUG_KMS("\n");
@@ -214,7 +220,7 @@ static void vlv_disable_dsi_pll(struct intel_encoder *encoder)
static void bxt_disable_dsi_pll(struct intel_encoder *encoder)
{
- struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
u32 val;
DRM_DEBUG_KMS("\n");
@@ -241,9 +247,10 @@ static void assert_bpp_mismatch(int pixel_format, int pipe_bpp)
bpp, pipe_bpp);
}
-static u32 vlv_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp)
+static u32 vlv_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp,
+ struct intel_crtc_state *config)
{
- struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
u32 dsi_clock, pclk;
u32 pll_ctl, pll_div;
@@ -258,6 +265,9 @@ static u32 vlv_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp)
pll_div = vlv_cck_read(dev_priv, CCK_REG_DSI_PLL_DIVIDER);
mutex_unlock(&dev_priv->sb_lock);
+ config->dsi_pll.ctrl = pll_ctl & ~DSI_PLL_LOCK;
+ config->dsi_pll.div = pll_div;
+
/* mask out other bits and extract the P1 divisor */
pll_ctl &= DSI_PLL_P1_POST_DIV_MASK;
pll_ctl = pll_ctl >> (DSI_PLL_P1_POST_DIV_SHIFT - 2);
@@ -303,7 +313,8 @@ static u32 vlv_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp)
return pclk;
}
-static u32 bxt_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp)
+static u32 bxt_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp,
+ struct intel_crtc_state *config)
{
u32 pclk;
u32 dsi_clk;
@@ -317,15 +328,9 @@ static u32 bxt_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp)
return 0;
}
- dsi_ratio = I915_READ(BXT_DSI_PLL_CTL) &
- BXT_DSI_PLL_RATIO_MASK;
+ config->dsi_pll.ctrl = I915_READ(BXT_DSI_PLL_CTL);
- /* Invalid DSI ratio ? */
- if (dsi_ratio < BXT_DSI_PLL_RATIO_MIN ||
- dsi_ratio > BXT_DSI_PLL_RATIO_MAX) {
- DRM_ERROR("Invalid DSI pll ratio(%u) programmed\n", dsi_ratio);
- return 0;
- }
+ dsi_ratio = config->dsi_pll.ctrl & BXT_DSI_PLL_RATIO_MASK;
dsi_clk = (dsi_ratio * BXT_REF_CLOCK_KHZ) / 2;
@@ -338,12 +343,13 @@ static u32 bxt_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp)
return pclk;
}
-u32 intel_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp)
+u32 intel_dsi_get_pclk(struct intel_encoder *encoder, int pipe_bpp,
+ struct intel_crtc_state *config)
{
if (IS_BROXTON(encoder->base.dev))
- return bxt_dsi_get_pclk(encoder, pipe_bpp);
+ return bxt_dsi_get_pclk(encoder, pipe_bpp, config);
else
- return vlv_dsi_get_pclk(encoder, pipe_bpp);
+ return vlv_dsi_get_pclk(encoder, pipe_bpp, config);
}
static void vlv_dsi_reset_clocks(struct intel_encoder *encoder, enum port port)
@@ -360,7 +366,8 @@ static void vlv_dsi_reset_clocks(struct intel_encoder *encoder, enum port port)
}
/* Program BXT Mipi clocks and dividers */
-static void bxt_dsi_program_clocks(struct drm_device *dev, enum port port)
+static void bxt_dsi_program_clocks(struct drm_device *dev, enum port port,
+ const struct intel_crtc_state *config)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 tmp;
@@ -380,8 +387,7 @@ static void bxt_dsi_program_clocks(struct drm_device *dev, enum port port)
tmp &= ~(BXT_MIPI_RX_ESCLK_LOWER_FIXDIV_MASK(port));
/* Get the current DSI rate(actual) */
- pll_ratio = I915_READ(BXT_DSI_PLL_CTL) &
- BXT_DSI_PLL_RATIO_MASK;
+ pll_ratio = config->dsi_pll.ctrl & BXT_DSI_PLL_RATIO_MASK;
dsi_rate = (BXT_REF_CLOCK_KHZ * pll_ratio) / 2;
/*
@@ -417,16 +423,15 @@ static void bxt_dsi_program_clocks(struct drm_device *dev, enum port port)
I915_WRITE(BXT_MIPI_CLOCK_CTL, tmp);
}
-static bool bxt_configure_dsi_pll(struct intel_encoder *encoder)
+static int bxt_compute_dsi_pll(struct intel_encoder *encoder,
+ struct intel_crtc_state *config)
{
- struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
u8 dsi_ratio;
u32 dsi_clk;
- u32 val;
dsi_clk = dsi_clk_from_pclk(intel_dsi->pclk, intel_dsi->pixel_format,
- intel_dsi->lane_count);
+ intel_dsi->lane_count);
/*
* From clock diagram, to get PLL ratio divider, divide double of DSI
@@ -435,9 +440,9 @@ static bool bxt_configure_dsi_pll(struct intel_encoder *encoder)
*/
dsi_ratio = DIV_ROUND_UP(dsi_clk * 2, BXT_REF_CLOCK_KHZ);
if (dsi_ratio < BXT_DSI_PLL_RATIO_MIN ||
- dsi_ratio > BXT_DSI_PLL_RATIO_MAX) {
+ dsi_ratio > BXT_DSI_PLL_RATIO_MAX) {
DRM_ERROR("Cant get a suitable ratio from DSI PLL ratios\n");
- return false;
+ return -ECHRNG;
}
/*
@@ -445,27 +450,28 @@ static bool bxt_configure_dsi_pll(struct intel_encoder *encoder)
* Spec says both have to be programmed, even if one is not getting
* used. Configure MIPI_CLOCK_CTL dividers in modeset
*/
- val = I915_READ(BXT_DSI_PLL_CTL);
- val &= ~BXT_DSI_PLL_PVD_RATIO_MASK;
- val &= ~BXT_DSI_FREQ_SEL_MASK;
- val &= ~BXT_DSI_PLL_RATIO_MASK;
- val |= (dsi_ratio | BXT_DSIA_16X_BY2 | BXT_DSIC_16X_BY2);
+ config->dsi_pll.ctrl = dsi_ratio | BXT_DSIA_16X_BY2 | BXT_DSIC_16X_BY2;
/* As per recommendation from hardware team,
* Prog PVD ratio =1 if dsi ratio <= 50
*/
- if (dsi_ratio <= 50) {
- val &= ~BXT_DSI_PLL_PVD_RATIO_MASK;
- val |= BXT_DSI_PLL_PVD_RATIO_1;
- }
+ if (dsi_ratio <= 50)
+ config->dsi_pll.ctrl |= BXT_DSI_PLL_PVD_RATIO_1;
- I915_WRITE(BXT_DSI_PLL_CTL, val);
- POSTING_READ(BXT_DSI_PLL_CTL);
+ return 0;
+}
- return true;
+static void bxt_configure_dsi_pll(struct intel_encoder *encoder,
+ const struct intel_crtc_state *config)
+{
+ struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+
+ I915_WRITE(BXT_DSI_PLL_CTL, config->dsi_pll.ctrl);
+ POSTING_READ(BXT_DSI_PLL_CTL);
}
-static void bxt_enable_dsi_pll(struct intel_encoder *encoder)
+static void bxt_enable_dsi_pll(struct intel_encoder *encoder,
+ const struct intel_crtc_state *config)
{
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
@@ -475,14 +481,11 @@ static void bxt_enable_dsi_pll(struct intel_encoder *encoder)
DRM_DEBUG_KMS("\n");
/* Configure PLL vales */
- if (!bxt_configure_dsi_pll(encoder)) {
- DRM_ERROR("Configure DSI PLL failed, abort PLL enable\n");
- return;
- }
+ bxt_configure_dsi_pll(encoder, config);
/* Program TX, RX, Dphy clocks */
for_each_dsi_port(port, intel_dsi->ports)
- bxt_dsi_program_clocks(encoder->base.dev, port);
+ bxt_dsi_program_clocks(encoder->base.dev, port, config);
/* Enable DSI PLL */
val = I915_READ(BXT_DSI_PLL_ENABLE);
@@ -498,14 +501,28 @@ static void bxt_enable_dsi_pll(struct intel_encoder *encoder)
DRM_DEBUG_KMS("DSI PLL locked\n");
}
-void intel_enable_dsi_pll(struct intel_encoder *encoder)
+int intel_compute_dsi_pll(struct intel_encoder *encoder,
+ struct intel_crtc_state *config)
+{
+ struct drm_device *dev = encoder->base.dev;
+
+ if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev))
+ return vlv_compute_dsi_pll(encoder, config);
+ else if (IS_BROXTON(dev))
+ return bxt_compute_dsi_pll(encoder, config);
+
+ return -ENODEV;
+}
+
+void intel_enable_dsi_pll(struct intel_encoder *encoder,
+ const struct intel_crtc_state *config)
{
struct drm_device *dev = encoder->base.dev;
if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev))
- vlv_enable_dsi_pll(encoder);
+ vlv_enable_dsi_pll(encoder, config);
else if (IS_BROXTON(dev))
- bxt_enable_dsi_pll(encoder);
+ bxt_enable_dsi_pll(encoder, config);
}
void intel_disable_dsi_pll(struct intel_encoder *encoder)
--
2.4.10
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