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Set drmmode_crtc->scanout_id = 0 when TearFree is disabled

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When disabling TearFree, drmmode_crtc->scanout_id could remain as 1,
but drmmode_set_mode_major would destroy drmmode_crtc->scanout[1], so
scanout_do_update() would keep bailing, and the scanout buffer would
stop being updated.

Fixes freeze after disabling TearFree on a CRTC with active RandR
rotation or other transform.

(Ported from amdgpu commit 7db0c8e9d7586cff4312d4b93684d35de3e6376f)
Acked-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Michel Dänzer
2018-07-10 18:53:06 +02:00
committed by Michel Dänzer
parent e9d2d14948
commit ee7e157461
1 changed files with 2 additions and 0 deletions
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2
src/drmmode_display.c
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@@ -885,6 +885,8 @@ drmmode_set_mode_major(xf86CrtcPtr crtc, DisplayModePtr mode,
drmmode_crtc_update_tear_free(crtc);
if (drmmode_crtc->tear_free)
scanout_id = drmmode_crtc->scanout_id;
else
drmmode_crtc->scanout_id = 0;
drmmode_crtc_gamma_do_set(crtc, crtc->gamma_red, crtc->gamma_green,
crtc->gamma_blue, crtc->gamma_size);