diff options
Diffstat (limited to 'drivers/gpu/drm/msm/dp/dp_link.c')
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_link.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c index f1f1d646539d..5a4817ac086f 100644 --- a/drivers/gpu/drm/msm/dp/dp_link.c +++ b/drivers/gpu/drm/msm/dp/dp_link.c @@ -937,6 +937,38 @@ static int dp_link_process_phy_test_pattern_request( return 0; } +static bool dp_link_read_psr_error_status(struct dp_link_private *link) +{ + u8 status; + + drm_dp_dpcd_read(link->aux, DP_PSR_ERROR_STATUS, &status, 1); + + if (status & DP_PSR_LINK_CRC_ERROR) + DRM_ERROR("PSR LINK CRC ERROR\n"); + else if (status & DP_PSR_RFB_STORAGE_ERROR) + DRM_ERROR("PSR RFB STORAGE ERROR\n"); + else if (status & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) + DRM_ERROR("PSR VSC SDP UNCORRECTABLE ERROR\n"); + else + return false; + + return true; +} + +static bool dp_link_psr_capability_changed(struct dp_link_private *link) +{ + u8 status; + + drm_dp_dpcd_read(link->aux, DP_PSR_ESI, &status, 1); + + if (status & DP_PSR_CAPS_CHANGE) { + drm_dbg_dp(link->drm_dev, "PSR Capability Change\n"); + return true; + } + + return false; +} + static u8 get_link_status(const u8 link_status[DP_LINK_STATUS_SIZE], int r) { return link_status[r - DP_LANE0_1_STATUS]; @@ -1055,6 +1087,10 @@ int dp_link_process_request(struct dp_link *dp_link) dp_link->sink_request |= DP_TEST_LINK_TRAINING; } else if (!dp_link_process_phy_test_pattern_request(link)) { dp_link->sink_request |= DP_TEST_LINK_PHY_TEST_PATTERN; + } else if (dp_link_read_psr_error_status(link)) { + DRM_ERROR("PSR IRQ_HPD received\n"); + } else if (dp_link_psr_capability_changed(link)) { + drm_dbg_dp(link->drm_dev, "PSR Capabiity changed"); } else { ret = dp_link_process_link_status_update(link); if (!ret) { |