Attachment 42539 Details for Bug 33487 – magic wm0 values

[patch] magic wm0 values

0001-reverse-engineer-safe-snb-wm0-values.patch (text/plain), 1.50 KB, created by Chris Wilson on 2011-01-26 09:50:26 UTC

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Creator: Chris Wilson

Created: 2011-01-26 09:50:26 UTC

Size: 1.50 KB

patch

obsolete

>From 52e2015152abcd506a7c9c138d3456d6e518fc0a Mon Sep 17 00:00:00 2001
>From: Chris Wilson <chris@chris-wilson.co.uk>
>Date: Sat, 8 Jan 2011 10:17:08 +0000
>Subject: [PATCH] reverse-engineer safe snb wm0 values
>
>---
> drivers/gpu/drm/i915/intel_display.c |    8 ++++++--
> 1 files changed, 6 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
>index edc4535..c1cb695 100644
>--- a/drivers/gpu/drm/i915/intel_display.c
>+++ b/drivers/gpu/drm/i915/intel_display.c
>@@ -4271,7 +4271,9 @@ static void sandybridge_update_wm(struct drm_device *dev)
> 				 &sandybridge_cursor_wm_info, latency,
> 				 &plane_wm, &cursor_wm)) {
> 		I915_WRITE(WM0_PIPEA_ILK,
>-			   (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
>+			   ((sandybridge_display_wm_info.fifo_size - plane_wm) << WM0_PIPE_PLANE_SHIFT) |
>+			   (2 << WM0_PIPE_SPRITE_SHIFT) |
>+			   cursor_wm);
> 		DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
> 			      " plane %d, " "cursor: %d\n",
> 			      plane_wm, cursor_wm);
>@@ -4283,7 +4285,9 @@ static void sandybridge_update_wm(struct drm_device *dev)
> 				 &sandybridge_cursor_wm_info, latency,
> 				 &plane_wm, &cursor_wm)) {
> 		I915_WRITE(WM0_PIPEB_ILK,
>-			   (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
>+			   ((sandybridge_display_wm_info.fifo_size - plane_wm) << WM0_PIPE_PLANE_SHIFT) |
>+			   (2 << WM0_PIPE_SPRITE_SHIFT) |
>+			   cursor_wm);
> 		DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
> 			      " plane %d, cursor: %d\n",
> 			      plane_wm, cursor_wm);
>-- 
>1.7.2.3
>

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Attachments on bug 33487: 42539 | 44487 | 48741 | 48840 | 48844

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