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| author | José Roberto de Souza <jose.souza@intel.com> | 2018-06-26 13:16:42 -0700 |
|---|---|---|
| committer | Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> | 2018-06-26 17:13:05 -0700 |
| commit | 93bf76ed882d5b7c6824e95d868d608f61b4f663 (patch) | |
| tree | e68e56f0cdf2c3aad6f155100fd72e801527f8d4 /drivers/gpu/drm/i915/intel_psr.c | |
| parent | cc3054ff6214f6d14d35ffe629ff8d5032ace7f7 (diff) | |
| download | linux-stable-93bf76ed882d5b7c6824e95d868d608f61b4f663.tar.gz linux-stable-93bf76ed882d5b7c6824e95d868d608f61b4f663.tar.bz2 linux-stable-93bf76ed882d5b7c6824e95d868d608f61b4f663.zip | |
drm/i915/psr: Handle PSR errors
Sink will interrupt source when it have any PSR error.
DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR is a PSR2 but already
handling it here.
The only missing error to be handled is DP_PSR_LINK_CRC_ERROR that
will be taken in care in a futher patch.
v6:
not handling DP_PSR_LINK_CRC_ERROR here
v5:
handling all PSR errors here, so the commit message and
comment have changed
v3:
disabling PSR instead of exiting on error
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180626201644.21932-3-jose.souza@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_psr.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_psr.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c index 445e97dc791d..860b46b72403 100644 --- a/drivers/gpu/drm/i915/intel_psr.c +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -949,6 +949,8 @@ void intel_psr_short_pulse(struct intel_dp *intel_dp) struct drm_i915_private *dev_priv = to_i915(dev); struct i915_psr *psr = &dev_priv->psr; u8 val; + const u8 errors = DP_PSR_RFB_STORAGE_ERROR | + DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR; if (!CAN_PSR(dev_priv) || !intel_dp_is_edp(intel_dp)) return; @@ -968,7 +970,25 @@ void intel_psr_short_pulse(struct intel_dp *intel_dp) intel_psr_disable_locked(intel_dp); } - /* TODO: handle other PSR/PSR2 errors */ + if (drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_ERROR_STATUS, &val) != 1) { + DRM_ERROR("PSR_ERROR_STATUS dpcd read failed\n"); + goto exit; + } + + if (val & DP_PSR_RFB_STORAGE_ERROR) + DRM_DEBUG_KMS("PSR RFB storage error, disabling PSR\n"); + if (val & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) + DRM_DEBUG_KMS("PSR VSC SDP uncorrectable error, disabling PSR\n"); + + if (val & ~errors) + DRM_ERROR("PSR_ERROR_STATUS unhandled errors %x\n", + val & ~errors); + if (val & errors) + intel_psr_disable_locked(intel_dp); + /* clear status register */ + drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_ERROR_STATUS, val); + + /* TODO: handle PSR2 errors */ exit: mutex_unlock(&psr->lock); } |