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| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2011-03-01 13:43:07 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2011-04-17 07:44:02 -0300 |
| commit | 994d5375a246c6585d2a6751d568cc86e89aef34 (patch) | |
| tree | 79708fd709ce5c304b0bfc7d2beaf755d9b02778 /drivers/media | |
| parent | b5feda91c1c3510f54720dd8f086653af230a0e1 (diff) | |
| download | linux-994d5375a246c6585d2a6751d568cc86e89aef34.tar.gz linux-994d5375a246c6585d2a6751d568cc86e89aef34.tar.bz2 linux-994d5375a246c6585d2a6751d568cc86e89aef34.zip | |
[media] omap3isp: isp: Reset the ISP when the pipeline can't be stopped
When a failure to stop a module in the pipeline is detected, the only
way to recover is to reset the ISP. However, as other users can be using
a different pipeline with other modules, the ISP can't be reset
synchronously with the error detection.
Mark the ISP as needing a reset when a failure to stop a pipeline is
detected, and reset the ISP when the last user releases the last
reference to the ISP.
Modify the omap3isp_pipeline_set_stream() function to record the new ISP
pipeline state only when no error occurs, except when stopping the
pipeline in which case the pipeline is still marked as stopped.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/video/omap3isp/isp.c | 14 | ||||
| -rw-r--r-- | drivers/media/video/omap3isp/isp.h | 1 |
2 files changed, 13 insertions, 2 deletions
diff --git a/drivers/media/video/omap3isp/isp.c b/drivers/media/video/omap3isp/isp.c index 7d68b109d32f..f380f09b119c 100644 --- a/drivers/media/video/omap3isp/isp.c +++ b/drivers/media/video/omap3isp/isp.c @@ -872,6 +872,9 @@ static int isp_pipeline_disable(struct isp_pipeline *pipe) } } + if (failure < 0) + isp->needs_reset = true; + return failure; } @@ -884,7 +887,8 @@ static int isp_pipeline_disable(struct isp_pipeline *pipe) * single-shot or continuous mode. * * Return 0 if successful, or the return value of the failed video::s_stream - * operation otherwise. + * operation otherwise. The pipeline state is not updated when the operation + * fails, except when stopping the pipeline. */ int omap3isp_pipeline_set_stream(struct isp_pipeline *pipe, enum isp_pipeline_stream_state state) @@ -895,7 +899,9 @@ int omap3isp_pipeline_set_stream(struct isp_pipeline *pipe, ret = isp_pipeline_disable(pipe); else ret = isp_pipeline_enable(pipe, state); - pipe->stream_state = state; + + if (ret == 0 || state == ISP_PIPELINE_STREAM_STOPPED) + pipe->stream_state = state; return ret; } @@ -1481,6 +1487,10 @@ void omap3isp_put(struct isp_device *isp) if (--isp->ref_count == 0) { isp_disable_interrupts(isp); isp_save_ctx(isp); + if (isp->needs_reset) { + isp_reset(isp); + isp->needs_reset = false; + } isp_disable_clocks(isp); } mutex_unlock(&isp->isp_mutex); diff --git a/drivers/media/video/omap3isp/isp.h b/drivers/media/video/omap3isp/isp.h index cf5214e95a92..5f87645565b8 100644 --- a/drivers/media/video/omap3isp/isp.h +++ b/drivers/media/video/omap3isp/isp.h @@ -262,6 +262,7 @@ struct isp_device { /* ISP Obj */ spinlock_t stat_lock; /* common lock for statistic drivers */ struct mutex isp_mutex; /* For handling ref_count field */ + bool needs_reset; int has_context; int ref_count; unsigned int autoidle; |