diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 75 |
1 files changed, 71 insertions, 4 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 5a955e33ba13..371d1e6129e5 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -4039,11 +4039,78 @@ intel_dp_get_sink_irq_esi(struct intel_dp *intel_dp, u8 *sink_irq_vector) return true; } -static void -intel_dp_handle_test_request(struct intel_dp *intel_dp) +static uint8_t intel_dp_autotest_link_training(struct intel_dp *intel_dp) +{ + uint8_t test_result = DP_TEST_ACK; + return test_result; +} + +static uint8_t intel_dp_autotest_video_pattern(struct intel_dp *intel_dp) +{ + uint8_t test_result = DP_TEST_NAK; + return test_result; +} + +static uint8_t intel_dp_autotest_edid(struct intel_dp *intel_dp) +{ + uint8_t test_result = DP_TEST_NAK; + return test_result; +} + +static uint8_t intel_dp_autotest_phy_pattern(struct intel_dp *intel_dp) +{ + uint8_t test_result = DP_TEST_NAK; + return test_result; +} + +static void intel_dp_handle_test_request(struct intel_dp *intel_dp) { - /* NAK by default */ - drm_dp_dpcd_writeb(&intel_dp->aux, DP_TEST_RESPONSE, DP_TEST_NAK); + uint8_t response = DP_TEST_NAK; + uint8_t rxdata = 0; + int status = 0; + + intel_dp->compliance_test_type = 0; + intel_dp->aux.i2c_nack_count = 0; + intel_dp->aux.i2c_defer_count = 0; + + status = drm_dp_dpcd_read(&intel_dp->aux, DP_TEST_REQUEST, &rxdata, 1); + if (status <= 0) { + DRM_DEBUG_KMS("Could not read test request from sink\n"); + goto update_status; + } + + switch (rxdata) { + case DP_TEST_LINK_TRAINING: + DRM_DEBUG_KMS("LINK_TRAINING test requested\n"); + intel_dp->compliance_test_type = DP_TEST_LINK_TRAINING; + response = intel_dp_autotest_link_training(intel_dp); + break; + case DP_TEST_LINK_VIDEO_PATTERN: + DRM_DEBUG_KMS("TEST_PATTERN test requested\n"); + intel_dp->compliance_test_type = DP_TEST_LINK_VIDEO_PATTERN; + response = intel_dp_autotest_video_pattern(intel_dp); + break; + case DP_TEST_LINK_EDID_READ: + DRM_DEBUG_KMS("EDID test requested\n"); + intel_dp->compliance_test_type = DP_TEST_LINK_EDID_READ; + response = intel_dp_autotest_edid(intel_dp); + break; + case DP_TEST_LINK_PHY_TEST_PATTERN: + DRM_DEBUG_KMS("PHY_PATTERN test requested\n"); + intel_dp->compliance_test_type = DP_TEST_LINK_PHY_TEST_PATTERN; + response = intel_dp_autotest_phy_pattern(intel_dp); + break; + default: + DRM_DEBUG_KMS("Invalid test request '%02x'\n", rxdata); + break; + } + +update_status: + status = drm_dp_dpcd_write(&intel_dp->aux, + DP_TEST_RESPONSE, + &response, 1); + if (status <= 0) + DRM_DEBUG_KMS("Could not write test response to sink\n"); } static int |