diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3595-drm-amd-display-revert-wait-in-pipelock.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3595-drm-amd-display-revert-wait-in-pipelock.patch | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3595-drm-amd-display-revert-wait-in-pipelock.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3595-drm-amd-display-revert-wait-in-pipelock.patch new file mode 100644 index 00000000..ce143eec --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.19.8/3595-drm-amd-display-revert-wait-in-pipelock.patch @@ -0,0 +1,47 @@ +From 4aff55de536255961069b1589637fed28f6dafed Mon Sep 17 00:00:00 2001 +From: Jun Lei <Jun.Lei@amd.com> +Date: Tue, 23 Jul 2019 16:56:03 -0400 +Subject: [PATCH 3595/4256] drm/amd/display: revert wait in pipelock + +[why] +Previous workaround to prevent a vsync flip to be converted +to immediate flip is no longer needed, and is risky because +there are cases where it can result in infinite loop. + +[how] +Remove wait loop (which is potentially infinite) before locking +pipe + +Signed-off-by: Jun Lei <Jun.Lei@amd.com> +Reviewed-by: Charlene Liu <Charlene.Liu@amd.com> +Reviewed-by: Eric Yang <eric.yang2@amd.com> +Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com> +--- + drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 11 ----------- + 1 file changed, 11 deletions(-) + +diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c +index adad15eb5d12..7f9e48566527 100644 +--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c ++++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c +@@ -1103,17 +1103,6 @@ void dcn20_pipe_control_lock( + if (pipe->plane_state != NULL) + flip_immediate = pipe->plane_state->flip_immediate; + +- if (flip_immediate && lock) { +- while (pipe->plane_res.hubp->funcs->hubp_is_flip_pending(pipe->plane_res.hubp)) { +- udelay(1); +- } +- +- if (pipe->bottom_pipe != NULL) +- while (pipe->bottom_pipe->plane_res.hubp->funcs->hubp_is_flip_pending(pipe->bottom_pipe->plane_res.hubp)) { +- udelay(1); +- } +- } +- + /* In flip immediate and pipe splitting case, we need to use GSL + * for synchronization. Only do setup on locking and on flip type change. + */ +-- +2.17.1 + |