diff options
| author | Todd Previte <tprevite@gmail.com> | 2014-11-04 15:17:35 -0700 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2014-11-05 14:03:22 +0100 |
| commit | e9cf6194ab0cdb8f40f1eca7b230751c2289557e (patch) | |
| tree | 9ba4a35167b2d05e9c0daa2daca995aed20802a7 /drivers/gpu/drm/drm_dp_helper.c | |
| parent | b74c6c92f2839206a3714a00af53b4bdc24c7224 (diff) | |
drm/dp: Add counters in the drm_dp_aux struct for I2C NACKs and DEFERs
These counters are used for Displayort compliance testing to detect error
conditions when executing tests 4.2.2.4 and 4.2.2.5 in the Displayport Link
CTS specificaiton. They determine whether to use the preferred/requested
mode or the failsafe mode during these tests.
V2:
- Addressed previous review feedback
- Updated commit message
- Changed from uint8_t to uint32_t
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Todd Previte <tprevite@gmail.com>
[danvet: s/uint32_t/unsigned/ for clearer intent. Also drop the i915
from the subject, it's all core stuff.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/drm_dp_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_dp_helper.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c index c088bad7e72f..959e2074b0d4 100644 --- a/drivers/gpu/drm/drm_dp_helper.c +++ b/drivers/gpu/drm/drm_dp_helper.c @@ -462,10 +462,12 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) case DP_AUX_I2C_REPLY_NACK: DRM_DEBUG_KMS("I2C nack\n"); + aux->i2c_nack_count++; return -EREMOTEIO; case DP_AUX_I2C_REPLY_DEFER: DRM_DEBUG_KMS("I2C defer\n"); + aux->i2c_defer_count++; usleep_range(400, 500); continue; |