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msm_fb: display: fix page fault during supend/resume

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There has VG1 pipe commit (pan display) happen after system
suspended. This left VG1 still staged up at mdp mixer. Once timing
generator is enabled at resume, VG1 pipe start fetching contents from
address 0 since VG1 has not yet be configured. This cause page fault.
This patch has sanity check at system suspend to make sure no any pipe
stage up at mixer after suspend.

Change-Id: Idcf974ceb4afe2a3ec55b9603b700fa497f84045
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
Signed-off-by: Siddhartha Agrawal <agrawals@codeaurora.org>
This commit is contained in:
Kuogee Hsieh 2012-08-10 14:31:37 -07:00 committed by Stephen Boyd
parent 5aac7da9b0
commit 4eab59af57
2 changed files with 3 additions and 0 deletions
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2
drivers/video/msm/mdp4_overlay_dsi_cmd.c
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@ -1210,7 +1210,9 @@ void mdp4_dsi_cmd_overlay(struct msm_fb_data_type *mfd)
mdp4_overlay_mdp_perf_upd(mfd, 1);
mutex_lock(&mfd->dma->ov_mutex);
mdp4_dsi_cmd_pipe_commit(cndx, 0);
mutex_unlock(&mfd->dma->ov_mutex);
mdp4_overlay_mdp_perf_upd(mfd, 0);
mutex_unlock(&mfd->dma->ov_mutex);

1
drivers/video/msm/mdp4_overlay_dsi_video.c
View file

@ -1150,6 +1150,7 @@ void mdp4_dsi_video_overlay(struct msm_fb_data_type *mfd)
mutex_lock(&mfd->dma->ov_mutex);
mdp4_dsi_video_pipe_commit(0, 0);
mutex_unlock(&mfd->dma->ov_mutex);
if (pipe->ov_blt_addr)
mdp4_dsi_video_wait4ov(0);