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* [Intel-gfx] [PATCH] drm/i915/display: relax 2big checking around initial fb
@ 2021-05-07  9:12 Matthew Auld
  2021-05-07 13:08 ` [Intel-gfx] ✓ Fi.CI.BAT: success for " Patchwork
                   ` (3 more replies)
  0 siblings, 4 replies; 6+ messages in thread
From: Matthew Auld @ 2021-05-07  9:12 UTC (permalink / raw)
  To: intel-gfx; +Cc: Daniel Vetter, Chris Wilson

From: Chris Wilson <chris@chris-wilson.co.uk>

The kernel prefers enabling fbc over the initial fb, since this leads to
actual runtime power savings, so if the initial fb is deemed too big
using some heuristic, then we simply skip allocating stolen for it.
However if the kernel is not configured with fbcon then it should be
possible to relax this, since unlike with fbcon the display server
shouldn't preserve it when later replacing it, and so we should be able
to re-use the stolen memory for fbc and friends. This patch is reported
to fix some flicker seen during boot splash on some devices.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Lee Shawn C <shawn.c.lee@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index ec2d3fa60003..0ee1f0213fd9 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1455,7 +1455,7 @@ initial_plane_vma(struct drm_i915_private *i915,
 	 * important and we should probably use that space with FBC or other
 	 * features.
 	 */
-	if (size * 2 > i915->stolen_usable_size)
+	if (IS_ENABLED(FRAMEBUFFER_CONSOLE) && size * 2 > i915->stolen_usable_size)
 		return NULL;
 
 	obj = i915_gem_object_create_stolen_for_preallocated(i915, base, size);
-- 
2.26.3

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^ permalink raw reply related	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2021-05-25 15:20 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-05-07  9:12 [Intel-gfx] [PATCH] drm/i915/display: relax 2big checking around initial fb Matthew Auld
2021-05-07 13:08 ` [Intel-gfx] ✓ Fi.CI.BAT: success for " Patchwork
2021-05-07 16:31 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2021-05-10  9:37 ` [Intel-gfx] [PATCH] " Lee, Shawn C
2021-05-25 13:25 ` Matthew Auld
2021-05-25 15:19   ` Imre Deak

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