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* [PATCH] drm/radeon: Update pitch for page flip
@ 2021-08-02  7:43 Zhenneng Li
       [not found] ` <e6e77cfb-4e6b-c30e-ae7c-ac84b82c9a75@amd.com>
  0 siblings, 1 reply; 7+ messages in thread
From: Zhenneng Li @ 2021-08-02  7:43 UTC (permalink / raw)
  Cc: Zhenneng Li, Alex Deucher, Christian König, Pan, Xinhui,
	David Airlie, Daniel Vetter, amd-gfx, dri-devel, linux-kernel

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When primary bo is updated, crtc's pitch may
have not been updated, this will lead to show
disorder content when user changes display mode,
we update crtc's pitch in page flip to avoid
this bug.
This refers to amdgpu's pageflip.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: "Pan, Xinhui" <Xinhui.Pan@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Zhenneng Li <lizhenneng@kylinos.cn>
---
 drivers/gpu/drm/radeon/evergreen.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
index 36a888e1b179..eeb590d2dec2 100644
--- a/drivers/gpu/drm/radeon/evergreen.c
+++ b/drivers/gpu/drm/radeon/evergreen.c
@@ -28,6 +28,7 @@
 
 #include <drm/drm_vblank.h>
 #include <drm/radeon_drm.h>
+#include <drm/drm_fourcc.h>
 
 #include "atom.h"
 #include "avivod.h"
@@ -1414,10 +1415,15 @@ void evergreen_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base,
 			 bool async)
 {
 	struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc_id];
+	struct drm_framebuffer *fb = radeon_crtc->base.primary->fb;
 
-	/* update the scanout addresses */
+	/* flip at hsync for async, default is vsync */
 	WREG32(EVERGREEN_GRPH_FLIP_CONTROL + radeon_crtc->crtc_offset,
 	       async ? EVERGREEN_GRPH_SURFACE_UPDATE_H_RETRACE_EN : 0);
+	/* update pitch */
+	WREG32(EVERGREEN_GRPH_PITCH + radeon_crtc->crtc_offset,
+	       fb->pitches[0] / fb->format->cpp[0]);
+	/* update the scanout addresses */
 	WREG32(EVERGREEN_GRPH_PRIMARY_SURFACE_ADDRESS_HIGH + radeon_crtc->crtc_offset,
 	       upper_32_bits(crtc_base));
 	WREG32(EVERGREEN_GRPH_PRIMARY_SURFACE_ADDRESS + radeon_crtc->crtc_offset,
-- 
2.25.1


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^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2021-08-04 15:46 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-08-02  7:43 [PATCH] drm/radeon: Update pitch for page flip Zhenneng Li
     [not found] ` <e6e77cfb-4e6b-c30e-ae7c-ac84b82c9a75@amd.com>
2021-08-02  8:31   ` Daniel Vetter
2021-08-02 14:51     ` Alex Deucher
2021-08-03  8:00       ` 李真能
2021-08-03  8:34       ` Michel Dänzer
2021-08-03 14:49         ` Alex Deucher
2021-08-04 15:46           ` Daniel Vetter

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