From: Thulasimani,Sivakumar Date: Fri, 7 Aug 2015 09:44:30 +0000 (+0530) Subject: drm/i915: fix checksum write for automated test reply X-Git-Tag: MMI-PSA29.97-13-9~7427^2~45^2~1663 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f79b468eca20dae31b6fcaaa738a7f99b764837d;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git drm/i915: fix checksum write for automated test reply DP spec requires the checksum of the last block read to be written when replying to TEST_EDID_READ. This patch fixes the current code to do the same. v2: removed loop for jumping blocks and performed direct addition as recommended by Daniel Signed-off-by: Sivakumar Thulasimani Reviewed-by: Sonika Jindal Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index f3133d81fb9d..016e7bc6af0a 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -4139,9 +4139,16 @@ static uint8_t intel_dp_autotest_edid(struct intel_dp *intel_dp) intel_dp->aux.i2c_defer_count); intel_dp->compliance_test_data = INTEL_DP_RESOLUTION_FAILSAFE; } else { + struct edid *block = intel_connector->detect_edid; + + /* We have to write the checksum + * of the last block read + */ + block += intel_connector->detect_edid->extensions; + if (!drm_dp_dpcd_write(&intel_dp->aux, DP_TEST_EDID_CHECKSUM, - &intel_connector->detect_edid->checksum, + &block->checksum, 1)) DRM_DEBUG_KMS("Failed to write EDID checksum\n");