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drm/i915: Try to stop sink crc calculation on error. 

Right now if we face any kind of error sink crc calculation
stays enabled.

So, let's give a shot and try to stop it anyway if it got enabled.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rafael Antognolli <rafael.antognolli@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Rodrigo Vivi 2015-07-23 16:35:45 -07:00 committed by Daniel Vetter
parent 6c24695988
commit afe0d67e1f
1 changed files with 5 additions and 4 deletions
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9
drivers/gpu/drm/i915/intel_dp.c
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@ -3994,7 +3994,7 @@ int intel_dp_sink_crc(struct intel_dp *intel_dp, u8 *crc)
if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK_MISC, &buf) < 0) {
ret = -EIO;
goto out;
goto stop;
}
test_crc_count = buf & DP_TEST_COUNT_MASK;
@ -4003,7 +4003,7 @@ int intel_dp_sink_crc(struct intel_dp *intel_dp, u8 *crc)
if (drm_dp_dpcd_readb(&intel_dp->aux,
DP_TEST_SINK_MISC, &buf) < 0) {
ret = -EIO;
goto out;
goto stop;
}
intel_wait_for_vblank(dev, intel_crtc->pipe);
} while (--attempts && (buf & DP_TEST_COUNT_MASK) == test_crc_count);
@ -4011,14 +4011,15 @@ int intel_dp_sink_crc(struct intel_dp *intel_dp, u8 *crc)
if (attempts == 0) {
DRM_DEBUG_KMS("Panel is unable to calculate CRC after 6 vblanks\n");
ret = -ETIMEDOUT;
goto out;
goto stop;
}
if (drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_CRC_R_CR, crc, 6) < 0) {
ret = -EIO;
goto out;
goto stop;
}
stop:
if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0) {
ret = -EIO;
goto out;