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From: Paulo Zanoni <paulo.r.zanoni@intel.com>
To: intel-gfx@lists.freedesktop.org
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Subject: [PATCH 5/9] drm/i915/gen9: minimum scanlines for Y tile is not always 4
Date: Tue, 13 Sep 2016 21:38:18 -0300	[thread overview]
Message-ID: <1473813502-16844-6-git-send-email-paulo.r.zanoni@intel.com> (raw)
In-Reply-To: <1473813502-16844-1-git-send-email-paulo.r.zanoni@intel.com>

During watermarks calculations, this value is used in 3 different
places. Only one of them was not using a hardcoded 4. Move the code up
so everybody can benefit from the actual value.

This should only help on situations with Y tiling + 90/270 rotation +
1 or 2 bpp or NV12.

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 56 +++++++++++++++++++++++------------------
 1 file changed, 32 insertions(+), 24 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index fe43044..4d46315 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -3504,7 +3504,8 @@ static uint32_t skl_wm_method1(uint32_t pixel_rate, uint8_t cpp, uint32_t latenc
 
 static uint32_t skl_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal,
 			       uint32_t horiz_pixels, uint8_t cpp,
-			       uint64_t tiling, uint32_t latency)
+			       uint64_t tiling, uint32_t latency,
+			       uint32_t y_min_scanlines)
 {
 	uint32_t ret;
 	uint32_t plane_bytes_per_line, plane_blocks_per_line;
@@ -3517,9 +3518,9 @@ static uint32_t skl_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal,
 
 	if (tiling == I915_FORMAT_MOD_Y_TILED ||
 	    tiling == I915_FORMAT_MOD_Yf_TILED) {
-		plane_bytes_per_line *= 4;
+		plane_bytes_per_line *= y_min_scanlines;
 		plane_blocks_per_line = DIV_ROUND_UP(plane_bytes_per_line, 512);
-		plane_blocks_per_line /= 4;
+		plane_blocks_per_line /= y_min_scanlines;
 	} else if (tiling == DRM_FORMAT_MOD_NONE) {
 		plane_blocks_per_line = DIV_ROUND_UP(plane_bytes_per_line, 512) + 1;
 	} else {
@@ -3576,6 +3577,7 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
 	uint8_t cpp;
 	uint32_t width = 0, height = 0;
 	uint32_t plane_pixel_rate;
+	uint32_t y_min_scanlines;
 
 	if (latency == 0 || !cstate->base.active || !intel_pstate->base.visible) {
 		*enabled = false;
@@ -3591,38 +3593,44 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
 	cpp = drm_format_plane_cpp(fb->pixel_format, 0);
 	plane_pixel_rate = skl_adjusted_plane_pixel_rate(cstate, intel_pstate);
 
+	if (intel_rotation_90_or_270(pstate->rotation)) {
+		int cpp = (fb->pixel_format == DRM_FORMAT_NV12) ?
+			drm_format_plane_cpp(fb->pixel_format, 1) :
+			drm_format_plane_cpp(fb->pixel_format, 0);
+
+		switch (cpp) {
+		case 1:
+			y_min_scanlines = 16;
+			break;
+		case 2:
+			y_min_scanlines = 8;
+			break;
+		default:
+			WARN(1, "Unsupported pixel depth for rotation");
+		case 4:
+			y_min_scanlines = 4;
+			break;
+		}
+	} else {
+		y_min_scanlines = 4;
+	}
+
 	method1 = skl_wm_method1(plane_pixel_rate, cpp, latency);
 	method2 = skl_wm_method2(plane_pixel_rate,
 				 cstate->base.adjusted_mode.crtc_htotal,
 				 width,
 				 cpp,
 				 fb->modifier[0],
-				 latency);
+				 latency,
+				 y_min_scanlines);
 
 	plane_bytes_per_line = width * cpp;
 	plane_blocks_per_line = DIV_ROUND_UP(plane_bytes_per_line, 512);
 
 	if (fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
 	    fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED) {
-		uint32_t min_scanlines = 4;
-		uint32_t y_tile_minimum;
-		if (intel_rotation_90_or_270(pstate->rotation)) {
-			int cpp = (fb->pixel_format == DRM_FORMAT_NV12) ?
-				drm_format_plane_cpp(fb->pixel_format, 1) :
-				drm_format_plane_cpp(fb->pixel_format, 0);
-
-			switch (cpp) {
-			case 1:
-				min_scanlines = 16;
-				break;
-			case 2:
-				min_scanlines = 8;
-				break;
-			case 8:
-				WARN(1, "Unsupported pixel depth for rotation");
-			}
-		}
-		y_tile_minimum = plane_blocks_per_line * min_scanlines;
+		uint32_t y_tile_minimum = plane_blocks_per_line *
+					  y_min_scanlines;
 		selected_result = max(method2, y_tile_minimum);
 	} else {
 		if ((ddb_allocation / plane_blocks_per_line) >= 1)
@@ -3637,7 +3645,7 @@ static int skl_compute_plane_wm(const struct drm_i915_private *dev_priv,
 	if (level >= 1 && level <= 7) {
 		if (fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
 		    fb->modifier[0] == I915_FORMAT_MOD_Yf_TILED)
-			res_lines += 4;
+			res_lines += y_min_scanlines;
 		else
 			res_blocks++;
 	}
-- 
2.7.4

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  parent reply	other threads:[~2016-09-14  0:38 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-14  0:38 [PATCH 0/9] SKL/KBL watermark fixes, v2 Paulo Zanoni
2016-09-14  0:38 ` [PATCH 1/9] drm/i915: SAGV is not SKL-only, so rename a few things Paulo Zanoni
2016-09-14  0:38 ` [PATCH 2/9] drm/i915: introduce intel_has_sagv() Paulo Zanoni
2016-09-14  0:38 ` [PATCH 3/9] drm/i915/kbl: KBL also needs to run the SAGV code Paulo Zanoni
2016-09-14  0:38 ` [PATCH 4/9] drm/i915/gen9: fix the WaWmMemoryReadLatency implementation Paulo Zanoni
2016-09-14  0:38 ` Paulo Zanoni [this message]
2016-09-15 12:37   ` [PATCH 5/9] drm/i915/gen9: minimum scanlines for Y tile is not always 4 Maarten Lankhorst
2016-09-14  0:38 ` [PATCH 6/9] drm/i915/gen9: fix plane_blocks_per_line on watermarks calculations Paulo Zanoni
2016-09-14  0:38 ` [PATCH 7/9] drm/i915/gen9: fix the watermark res_blocks value Paulo Zanoni
2016-09-14  0:38 ` [PATCH 8/9] drm/i915/gen9: implement missing case for SKL watermarks calculation Paulo Zanoni
2016-09-14  0:38 ` [PATCH 9/9] drm/i915/gen9: fail the modeset instead of WARNing on unsuported config Paulo Zanoni
2016-09-15 12:15   ` Ville Syrjälä
2016-09-14  5:38 ` ✗ Fi.CI.BAT: failure for SKL/KBL watermark fixes (rev2) Patchwork
2016-09-14  9:34 ` [PATCH 0/9] SKL/KBL watermark fixes, v2 Jani Nikula
2016-09-14 13:25   ` Zanoni, Paulo R
2016-09-15  9:29     ` Jani Nikula
2016-09-22 21:00 [PATCH 0/9] SKL/KBL watermark fixes, v3 Paulo Zanoni
2016-09-22 21:00 ` [PATCH 5/9] drm/i915/gen9: minimum scanlines for Y tile is not always 4 Paulo Zanoni
2016-09-27  7:06   ` Tvrtko Ursulin

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