[PATCH 01/14] drm/i915: Store the pipe pixel rate in the crtc state

[ville.syrjala@linux.intel.com]

From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Rather than recomptuing the pipe pixel rate on demand everwhere, let's
just stick the precomputed value into the crtc state.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 31 ++++++++++++++++++++++++++-----
 drivers/gpu/drm/i915/intel_drv.h     |  2 ++
 drivers/gpu/drm/i915/intel_fbc.c     |  3 +--
 drivers/gpu/drm/i915/intel_pm.c      | 14 +++++++-------
 4 files changed, 36 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 0b0d7e8be630..1d979041c52c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -7178,7 +7178,7 @@ static bool pipe_config_supports_ips(struct drm_i915_private *dev_priv,
 	 *
 	 * Should measure whether using a lower cdclk w/o IPS
 	 */
-	return ilk_pipe_pixel_rate(pipe_config) <=
+	return pipe_config->pixel_rate <=
 		dev_priv->max_cdclk_freq * 95 / 100;
 }
 
@@ -7202,6 +7202,19 @@ static bool intel_crtc_supports_double_wide(const struct intel_crtc *crtc)
 		(crtc->pipe == PIPE_A || IS_I915G(dev_priv));
 }
 
+static void intel_crtc_compute_pixel_rate(struct intel_crtc_state *crtc_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev);
+
+	if (HAS_GMCH_DISPLAY(dev_priv))
+		/* FIXME calculate proper pipe pixel rate GMCH pfit */
+		crtc_state->pixel_rate =
+			crtc_state->base.adjusted_mode.crtc_clock;
+	else
+		crtc_state->pixel_rate =
+			ilk_pipe_pixel_rate(crtc_state);
+}
+
 static int intel_crtc_compute_config(struct intel_crtc *crtc,
 				     struct intel_crtc_state *pipe_config)
 {
@@ -7248,6 +7261,8 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc,
 		adjusted_mode->crtc_hsync_start == adjusted_mode->crtc_hdisplay)
 		return -EINVAL;
 
+	intel_crtc_compute_pixel_rate(pipe_config);
+
 	if (HAS_IPS(dev_priv))
 		hsw_compute_ips_config(crtc, pipe_config);
 
@@ -10297,7 +10312,7 @@ static int ilk_max_pixel_rate(struct drm_atomic_state *state)
 			continue;
 		}
 
-		pixel_rate = ilk_pipe_pixel_rate(crtc_state);
+		pixel_rate = crtc_state->pixel_rate;
 
 		if (IS_BROADWELL(dev_priv) || IS_GEN9(dev_priv))
 			pixel_rate = bdw_adjust_min_pipe_pixel_rate(crtc_state,
@@ -12802,9 +12817,10 @@ static void intel_dump_pipe_config(struct intel_crtc *crtc,
 	DRM_DEBUG_KMS("adjusted mode:\n");
 	drm_mode_debug_printmodeline(&pipe_config->base.adjusted_mode);
 	intel_dump_crtc_timings(&pipe_config->base.adjusted_mode);
-	DRM_DEBUG_KMS("port clock: %d, pipe src size: %dx%d\n",
+	DRM_DEBUG_KMS("port clock: %d, pipe src size: %dx%d, pixel rate %d\n",
 		      pipe_config->port_clock,
-		      pipe_config->pipe_src_w, pipe_config->pipe_src_h);
+		      pipe_config->pipe_src_w, pipe_config->pipe_src_h,
+		      pipe_config->pixel_rate);
 
 	if (INTEL_GEN(dev_priv) >= 9)
 		DRM_DEBUG_KMS("num_scalers: %d, scaler_users: 0x%x, scaler_id: %d\n",
@@ -13409,6 +13425,7 @@ intel_pipe_config_compare(struct drm_i915_private *dev_priv,
 		}
 
 		PIPE_CONF_CHECK_I(scaler_state.scaler_id);
+		PIPE_CONF_CHECK_CLOCK_FUZZY(pixel_rate);
 	}
 
 	/* BDW+ don't expose a synchronous way to read the state */
@@ -13700,6 +13717,8 @@ verify_crtc_state(struct drm_crtc *crtc,
 		}
 	}
 
+	intel_crtc_compute_pixel_rate(pipe_config);
+
 	if (!new_crtc_state->active)
 		return;
 
@@ -16919,7 +16938,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 			dev_priv->active_crtcs |= 1 << crtc->pipe;
 
 			if (INTEL_GEN(dev_priv) >= 9 || IS_BROADWELL(dev_priv))
-				pixclk = ilk_pipe_pixel_rate(crtc_state);
+				pixclk = crtc_state->pixel_rate;
 			else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
 				pixclk = crtc_state->base.adjusted_mode.crtc_clock;
 			else
@@ -17031,6 +17050,8 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
 			 */
 			crtc->base.state->mode.private_flags = I915_MODE_FLAG_INHERITED;
 
+			intel_crtc_compute_pixel_rate(crtc->config);
+
 			drm_calc_timestamping_constants(&crtc->base, &crtc->base.hwmode);
 			update_scanline_offset(crtc);
 		}
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index f61ea43c7532..3969e786d566 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -541,6 +541,8 @@ struct intel_crtc_state {
 	 * and get clipped at the edges. */
 	int pipe_src_w, pipe_src_h;
 
+	unsigned int pixel_rate;
+
 	/* Whether to set up the PCH/FDI. Note that we never allow sharing
 	 * between pch encoders and cpu encoders. */
 	bool has_pch_encoder;
diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c
index 659cebc3bfd2..463056d80f9b 100644
--- a/drivers/gpu/drm/i915/intel_fbc.c
+++ b/drivers/gpu/drm/i915/intel_fbc.c
@@ -747,8 +747,7 @@ static void intel_fbc_update_state_cache(struct intel_crtc *crtc,
 
 	cache->crtc.mode_flags = crtc_state->base.adjusted_mode.flags;
 	if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
-		cache->crtc.hsw_bdw_pixel_rate =
-			ilk_pipe_pixel_rate(crtc_state);
+		cache->crtc.hsw_bdw_pixel_rate = crtc_state->pixel_rate;
 
 	cache->plane.rotation = plane_state->base.rotation;
 	cache->plane.src_w = drm_rect_width(&plane_state->base.src) >> 16;
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 7cbd6181a612..79e2be4216e4 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -1807,12 +1807,12 @@ static uint32_t ilk_compute_pri_wm(const struct intel_crtc_state *cstate,
 
 	cpp = pstate->base.fb->format->cpp[0];
 
-	method1 = ilk_wm_method1(ilk_pipe_pixel_rate(cstate), cpp, mem_value);
+	method1 = ilk_wm_method1(cstate->pixel_rate, cpp, mem_value);
 
 	if (!is_lp)
 		return method1;
 
-	method2 = ilk_wm_method2(ilk_pipe_pixel_rate(cstate),
+	method2 = ilk_wm_method2(cstate->pixel_rate,
 				 cstate->base.adjusted_mode.crtc_htotal,
 				 drm_rect_width(&pstate->base.dst),
 				 cpp, mem_value);
@@ -1836,8 +1836,8 @@ static uint32_t ilk_compute_spr_wm(const struct intel_crtc_state *cstate,
 
 	cpp = pstate->base.fb->format->cpp[0];
 
-	method1 = ilk_wm_method1(ilk_pipe_pixel_rate(cstate), cpp, mem_value);
-	method2 = ilk_wm_method2(ilk_pipe_pixel_rate(cstate),
+	method1 = ilk_wm_method1(cstate->pixel_rate, cpp, mem_value);
+	method2 = ilk_wm_method2(cstate->pixel_rate,
 				 cstate->base.adjusted_mode.crtc_htotal,
 				 drm_rect_width(&pstate->base.dst),
 				 cpp, mem_value);
@@ -1863,7 +1863,7 @@ static uint32_t ilk_compute_cur_wm(const struct intel_crtc_state *cstate,
 	if (!cstate->base.active)
 		return 0;
 
-	return ilk_wm_method2(ilk_pipe_pixel_rate(cstate),
+	return ilk_wm_method2(cstate->pixel_rate,
 			      cstate->base.adjusted_mode.crtc_htotal,
 			      width, cpp, mem_value);
 }
@@ -3547,7 +3547,7 @@ static uint32_t skl_adjusted_plane_pixel_rate(const struct intel_crtc_state *cst
 	 * Adjusted plane pixel rate is just the pipe's adjusted pixel rate
 	 * with additional adjustments for plane-specific scaling.
 	 */
-	adjusted_pixel_rate = ilk_pipe_pixel_rate(cstate);
+	adjusted_pixel_rate = cstate->pixel_rate;
 	downscale_amount = skl_plane_downscale_amount(pstate);
 
 	pixel_rate = adjusted_pixel_rate * downscale_amount >> 16;
@@ -3775,7 +3775,7 @@ skl_compute_linetime_wm(struct intel_crtc_state *cstate)
 	if (!cstate->base.active)
 		return 0;
 
-	pixel_rate = ilk_pipe_pixel_rate(cstate);
+	pixel_rate = cstate->pixel_rate;
 
 	if (WARN_ON(pixel_rate == 0))
 		return 0;
-- 
2.10.2

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