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| author | Tomeu Vizoso <tomeu.vizoso@collabora.com> | 2017-03-03 14:39:34 +0100 |
|---|---|---|
| committer | Sean Paul <seanpaul@chromium.org> | 2017-03-06 18:14:27 +0100 |
| commit | 79c1da7c3bf74be9b1dae9450ef79f32dd22def6 (patch) | |
| tree | 4d58929baaa06ab1820bb4c522eb3d5a1add04db /include/drm/drm_dp_helper.h | |
| parent | drm/dp: add crtc backpointer to drm_dp_aux (diff) | |
| download | linux-79c1da7c3bf74be9b1dae9450ef79f32dd22def6.tar.xz linux-79c1da7c3bf74be9b1dae9450ef79f32dd22def6.zip | |
drm/dp: add helpers for capture of frame CRCs
Adds helpers for starting and stopping capture of frame CRCs through the
DPCD. When capture is on, a worker waits for vblanks and retrieves the
frame CRC to put it in the queue on the CRTC that is using the
eDP connector, so it's passed to userspace.
v2: Reuse drm_crtc_wait_one_vblank
Update locking, as drm_crtc_add_crc_entry now takes the lock
v3: Don't call wake_up_interruptible directly, that's now done in
drm_crtc_add_crc_entry.
v4: Style fixes (Sean Paul)
Reworked retry of CRC reads (Sean Paul)
Flush worker after stopping CRC generationa (Sean Paul)
v5: Move back to make the retry explicitly once
v6: Set and use the drm_crtc backpointer (Sean Paul)
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170303133936.14964-3-tomeu.vizoso@collabora.com
Diffstat (limited to 'include/drm/drm_dp_helper.h')
| -rw-r--r-- | include/drm/drm_dp_helper.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index afe515855f0a..c34984c8d5d0 100644 --- a/include/drm/drm_dp_helper.h +++ b/include/drm/drm_dp_helper.h @@ -734,6 +734,8 @@ struct drm_dp_aux_msg { * @dev: pointer to struct device that is the parent for this AUX channel * @crtc: backpointer to the crtc that is currently using this AUX channel * @hw_mutex: internal mutex used for locking transfers + * @crc_work: worker that captures CRCs for each frame + * @crc_count: counter of captured frame CRCs * @transfer: transfers a message representing a single AUX transaction * * The .dev field should be set to a pointer to the device that implements @@ -771,6 +773,8 @@ struct drm_dp_aux { struct device *dev; struct drm_crtc *crtc; struct mutex hw_mutex; + struct work_struct crc_work; + u8 crc_count; ssize_t (*transfer)(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg); /** @@ -849,4 +853,7 @@ void drm_dp_aux_init(struct drm_dp_aux *aux); int drm_dp_aux_register(struct drm_dp_aux *aux); void drm_dp_aux_unregister(struct drm_dp_aux *aux); +int drm_dp_start_crc(struct drm_dp_aux *aux, struct drm_crtc *crtc); +int drm_dp_stop_crc(struct drm_dp_aux *aux); + #endif /* _DRM_DP_HELPER_H_ */ |