diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_fimd.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c index 6e5e1a84d72..e7cc2ab311a 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c @@ -636,6 +636,25 @@ static void fimd_win_commit(struct exynos_drm_manager *mgr, int zpos) } /* + * Wait for the completion of current transmission if fimd is still + * transmitting video data. + * + * Below codes resolve following issue: + * when resumed, fimd_win_commit() could be called to update overlay + * relevent registers and then pae flip could be performed by userspace + * request. The problem is that te interrupt could occur and + * fimd_trigger() could be called before fimd_win_commit is called by + * page flip function, exynos_drm_crtc_page_flip. + * + * In this case, there is a problem that fimd_win_commit() is called by + * the page flip request while fimd is still transmitting video data + * so overlay registers are updated to new buffer. That makes screen + * to be shaked. + */ + if (ctx->i80_if && atomic_read(&ctx->triggering)) + fimd_wait_for_vblank(mgr); + + /* * SHADOWCON/PRTCON register is used for enabling timing. * * for example, once only width value of a register is set, |