diff options
| author | Imre Deak <imre.deak@intel.com> | 2020-10-03 03:18:44 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2020-10-06 14:00:26 +0300 |
| commit | 7d6287a8481242cb0f324a2937258f240036dd17 (patch) | |
| tree | b40a9af538891b47245c6db206c313e7f8886e9d /drivers/gpu/drm/i915/display/intel_dp.c | |
| parent | b671d6ef8b20ffc2161e1e803f8c7b143e1b1615 (diff) | |
drm/i915: Check for unsupported DP link rates during initial commit
Some BIOSes set an unsupported/imprecise DP link rate (for instance on
TGL A stepping). Make sure that we do an encoder recompute and a modeset
in this case.
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201003001846.1271151-4-imre.deak@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index d33a3d9fdc3a..df5277c2b9ba 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -3707,6 +3707,18 @@ bool intel_dp_initial_fastset_check(struct intel_encoder *encoder, struct intel_crtc_state *crtc_state) { struct drm_i915_private *i915 = to_i915(encoder->base.dev); + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + + /* + * If BIOS has set an unsupported or non-standard link rate for some + * reason force an encoder recompute and full modeset. + */ + if (intel_dp_rate_index(intel_dp->source_rates, intel_dp->num_source_rates, + crtc_state->port_clock) < 0) { + drm_dbg_kms(&i915->drm, "Forcing full modeset due to unsupported link rate\n"); + crtc_state->uapi.connectors_changed = true; + return false; + } /* * FIXME hack to force full modeset when DSC is being used. |