diff mbox series

[02/10] drm/i915: Shrink ilk-bdw wm storage by using u16

Message ID 20201030165045.5000-3-ville.syrjala@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series drm/i915: ilk+ wm cleanups | expand

Commit Message

Ville Syrjala Oct. 30, 2020, 4:50 p.m. UTC
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

The maximum watermark value we can ever have on ilk-bdw is
11 bits. Thus we can safely store all of these values in
u16.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 .../drm/i915/display/intel_display_types.h    |  8 +-
 drivers/gpu/drm/i915/intel_pm.c               | 74 +++++++++----------
 2 files changed, 40 insertions(+), 42 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index f6f0626649e0..4c25e2e4f4ee 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -666,10 +666,10 @@  struct intel_crtc_scaler_state {
 
 struct intel_wm_level {
 	bool enable;
-	u32 pri_val;
-	u32 spr_val;
-	u32 cur_val;
-	u32 fbc_val;
+	u16 pri_val;
+	u16 spr_val;
+	u16 cur_val;
+	u16 fbc_val;
 };
 
 struct intel_pipe_wm {
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 75d2322cd456..a82fb812b8c7 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -1225,9 +1225,9 @@  static bool g4x_raw_fbc_wm_set(struct intel_crtc_state *crtc_state,
 	return dirty;
 }
 
-static u32 ilk_compute_fbc_wm(const struct intel_crtc_state *crtc_state,
+static u16 ilk_compute_fbc_wm(const struct intel_crtc_state *crtc_state,
 			      const struct intel_plane_state *plane_state,
-			      u32 pri_val);
+			      u16 pri_val);
 
 static bool g4x_raw_plane_wm_compute(struct intel_crtc_state *crtc_state,
 				     const struct intel_plane_state *plane_state)
@@ -2506,7 +2506,7 @@  static unsigned int ilk_wm_method1(unsigned int pixel_rate,
 	ret = intel_wm_method1(pixel_rate, cpp, latency);
 	ret = DIV_ROUND_UP(ret, 64) + 2;
 
-	return ret;
+	return min_t(unsigned int, ret, U16_MAX);
 }
 
 /* latency must be in 0.1us units. */
@@ -2522,10 +2522,11 @@  static unsigned int ilk_wm_method2(unsigned int pixel_rate,
 			       width, cpp, latency);
 	ret = DIV_ROUND_UP(ret, 64) + 2;
 
-	return ret;
+	return min_t(unsigned int, ret, U16_MAX);
 }
 
-static u32 ilk_wm_fbc(u32 pri_val, u32 horiz_pixels, u8 cpp)
+static u16 ilk_wm_fbc(u16 pri_val, unsigned int horiz_pixels,
+		      unsigned int cpp)
 {
 	/*
 	 * Neither of these should be possible since this function shouldn't be
@@ -2552,15 +2553,15 @@  struct ilk_wm_maximums {
  * For both WM_PIPE and WM_LP.
  * mem_value must be in 0.1us units.
  */
-static u32 ilk_compute_pri_wm(const struct intel_crtc_state *crtc_state,
+static u16 ilk_compute_pri_wm(const struct intel_crtc_state *crtc_state,
 			      const struct intel_plane_state *plane_state,
-			      u32 mem_value, bool is_lp)
+			      unsigned int mem_value, bool is_lp)
 {
-	u32 method1, method2;
+	u16 method1, method2;
 	int cpp;
 
 	if (mem_value == 0)
-		return U32_MAX;
+		return U16_MAX;
 
 	if (!intel_wm_plane_visible(crtc_state, plane_state))
 		return 0;
@@ -2584,15 +2585,15 @@  static u32 ilk_compute_pri_wm(const struct intel_crtc_state *crtc_state,
  * For both WM_PIPE and WM_LP.
  * mem_value must be in 0.1us units.
  */
-static u32 ilk_compute_spr_wm(const struct intel_crtc_state *crtc_state,
+static u16 ilk_compute_spr_wm(const struct intel_crtc_state *crtc_state,
 			      const struct intel_plane_state *plane_state,
-			      u32 mem_value)
+			      unsigned int mem_value)
 {
-	u32 method1, method2;
+	u16 method1, method2;
 	int cpp;
 
 	if (mem_value == 0)
-		return U32_MAX;
+		return U16_MAX;
 
 	if (!intel_wm_plane_visible(crtc_state, plane_state))
 		return 0;
@@ -2611,14 +2612,14 @@  static u32 ilk_compute_spr_wm(const struct intel_crtc_state *crtc_state,
  * For both WM_PIPE and WM_LP.
  * mem_value must be in 0.1us units.
  */
-static u32 ilk_compute_cur_wm(const struct intel_crtc_state *crtc_state,
+static u16 ilk_compute_cur_wm(const struct intel_crtc_state *crtc_state,
 			      const struct intel_plane_state *plane_state,
-			      u32 mem_value)
+			      unsigned int mem_value)
 {
 	int cpp;
 
 	if (mem_value == 0)
-		return U32_MAX;
+		return U16_MAX;
 
 	if (!intel_wm_plane_visible(crtc_state, plane_state))
 		return 0;
@@ -2632,9 +2633,9 @@  static u32 ilk_compute_cur_wm(const struct intel_crtc_state *crtc_state,
 }
 
 /* Only for WM_LP. */
-static u32 ilk_compute_fbc_wm(const struct intel_crtc_state *crtc_state,
+static u16 ilk_compute_fbc_wm(const struct intel_crtc_state *crtc_state,
 			      const struct intel_plane_state *plane_state,
-			      u32 pri_val)
+			      u16 pri_val)
 {
 	int cpp;
 
@@ -2647,8 +2648,7 @@  static u32 ilk_compute_fbc_wm(const struct intel_crtc_state *crtc_state,
 			  cpp);
 }
 
-static unsigned int
-ilk_display_fifo_size(const struct drm_i915_private *dev_priv)
+static u16 ilk_display_fifo_size(const struct drm_i915_private *dev_priv)
 {
 	if (INTEL_GEN(dev_priv) >= 8)
 		return 3072;
@@ -2658,9 +2658,8 @@  ilk_display_fifo_size(const struct drm_i915_private *dev_priv)
 		return 512;
 }
 
-static unsigned int
-ilk_plane_wm_reg_max(const struct drm_i915_private *dev_priv,
-		     int level, bool is_sprite)
+static u16 ilk_plane_wm_reg_max(const struct drm_i915_private *dev_priv,
+				int level, bool is_sprite)
 {
 	if (INTEL_GEN(dev_priv) >= 8)
 		/* BDW primary/sprite plane watermarks */
@@ -2676,8 +2675,7 @@  ilk_plane_wm_reg_max(const struct drm_i915_private *dev_priv,
 		return level == 0 ? 63 : 255;
 }
 
-static unsigned int
-ilk_cursor_wm_reg_max(const struct drm_i915_private *dev_priv, int level)
+static u16 ilk_cursor_wm_reg_max(const struct drm_i915_private *dev_priv, int level)
 {
 	if (INTEL_GEN(dev_priv) >= 7)
 		return level == 0 ? 63 : 255;
@@ -2685,7 +2683,7 @@  ilk_cursor_wm_reg_max(const struct drm_i915_private *dev_priv, int level)
 		return level == 0 ? 31 : 63;
 }
 
-static unsigned int ilk_fbc_wm_reg_max(const struct drm_i915_private *dev_priv)
+static u16 ilk_fbc_wm_reg_max(const struct drm_i915_private *dev_priv)
 {
 	if (INTEL_GEN(dev_priv) >= 8)
 		return 31;
@@ -2694,13 +2692,13 @@  static unsigned int ilk_fbc_wm_reg_max(const struct drm_i915_private *dev_priv)
 }
 
 /* Calculate the maximum primary/sprite plane watermark */
-static unsigned int ilk_plane_wm_max(const struct drm_i915_private *dev_priv,
-				     int level,
-				     const struct intel_wm_config *config,
-				     enum intel_ddb_partitioning ddb_partitioning,
-				     bool is_sprite)
+static u16 ilk_plane_wm_max(const struct drm_i915_private *dev_priv,
+			    int level,
+			    const struct intel_wm_config *config,
+			    enum intel_ddb_partitioning ddb_partitioning,
+			    bool is_sprite)
 {
-	unsigned int fifo_size = ilk_display_fifo_size(dev_priv);
+	u16 fifo_size = ilk_display_fifo_size(dev_priv);
 
 	/* if sprites aren't enabled, sprites get nothing */
 	if (is_sprite && !config->sprites_enabled)
@@ -2735,9 +2733,9 @@  static unsigned int ilk_plane_wm_max(const struct drm_i915_private *dev_priv,
 }
 
 /* Calculate the maximum cursor plane watermark */
-static unsigned int ilk_cursor_wm_max(const struct drm_i915_private *dev_priv,
-				      int level,
-				      const struct intel_wm_config *config)
+static u16 ilk_cursor_wm_max(const struct drm_i915_private *dev_priv,
+			     int level,
+			     const struct intel_wm_config *config)
 {
 	/* HSW LP1+ watermarks w/ multiple pipes */
 	if (level > 0 && config->num_pipes_active > 1)
@@ -2801,9 +2799,9 @@  static bool ilk_validate_wm_level(int level,
 			DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n",
 				      level, result->cur_val, max->cur);
 
-		result->pri_val = min_t(u32, result->pri_val, max->pri);
-		result->spr_val = min_t(u32, result->spr_val, max->spr);
-		result->cur_val = min_t(u32, result->cur_val, max->cur);
+		result->pri_val = min(result->pri_val, max->pri);
+		result->spr_val = min(result->spr_val, max->spr);
+		result->cur_val = min(result->cur_val, max->cur);
 		result->enable = true;
 	}