diff options
| author | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2018-07-19 17:31:55 -0700 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2018-07-20 10:24:21 -0700 |
| commit | 7a72c78bdd0a1ea1d879610542679cc680398220 (patch) | |
| tree | 9ee55eb23004832cac65f53b5df139f7046c2b1c /drivers/gpu/drm/i915/i915_debugfs.c | |
| parent | 6bd31b3798c83b611737097d98008663a2f5d065 (diff) | |
drm/i915: Fix psr sink status report.
First of all don't try to read dpcd if PSR is not even supported.
But also, if read failed return -EIO instead of reporting via a
backchannel.
v2: fix dev_priv: At this level m->private is the connector. (CI/DK)
don't convert dpcd read errors to EIO. (DK)
Fixes: 5b7b30864d1d ("drm/i915/psr: Split sink status into a separate debugfs node")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180720003155.16290-1-rodrigo.vivi@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_debugfs.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index b3aefd623557..59dc0610ea44 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -2606,13 +2606,22 @@ static int i915_psr_sink_status_show(struct seq_file *m, void *data) "sink internal error", }; struct drm_connector *connector = m->private; + struct drm_i915_private *dev_priv = to_i915(connector->dev); struct intel_dp *intel_dp = enc_to_intel_dp(&intel_attached_encoder(connector)->base); + int ret; + + if (!CAN_PSR(dev_priv)) { + seq_puts(m, "PSR Unsupported\n"); + return -ENODEV; + } if (connector->status != connector_status_connected) return -ENODEV; - if (drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_STATUS, &val) == 1) { + ret = drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_STATUS, &val); + + if (ret == 1) { const char *str = "unknown"; val &= DP_PSR_SINK_STATE_MASK; @@ -2620,7 +2629,7 @@ static int i915_psr_sink_status_show(struct seq_file *m, void *data) str = sink_status[val]; seq_printf(m, "Sink PSR status: 0x%x [%s]\n", val, str); } else { - DRM_ERROR("dpcd read (at %u) failed\n", DP_PSR_STATUS); + return ret; } return 0; |