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UPSTREAM: drm/dp: add crtc backpointer to drm_dp_aux

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This backpointer allows DP helpers to access the crtc it's currently
being used for.

v6: Have the backpointer be to drm_crtc (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/20170303133936.14964-2-tomeu.vizoso@collabora.com
(cherry picked from commit 4bb310fd9e)

Change-Id: I61ac0aca125b5f5eea5f1c9471d63f7f94e86039
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
This commit is contained in:
Tomeu Vizoso
2017-03-03 14:39:33 +01:00
committed by Tao Huang
parent 4b00ec7c60
commit ff2d12fa32
1 changed files with 2 additions and 0 deletions
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2
include/drm/drm_dp_helper.h
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@@ -689,6 +689,7 @@ struct drm_dp_aux_msg {
* @name: user-visible name of this AUX channel and the I2C-over-AUX adapter
* @ddc: I2C adapter that can be used for I2C-over-AUX communication
* @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
* @transfer: transfers a message representing a single AUX transaction
*
@@ -725,6 +726,7 @@ struct drm_dp_aux {
const char *name;
struct i2c_adapter ddc;
struct device *dev;
struct drm_crtc *crtc;
struct mutex hw_mutex;
ssize_t (*transfer)(struct drm_dp_aux *aux,
struct drm_dp_aux_msg *msg);