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drm/i915/bios: Tolerate devdata==NULL in intel_bios_encoder_supports_dp_dual_mode()

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If we have no VBT, or the VBT didn't declare the encoder
in question, we won't have the 'devdata' for the encoder.
Instead of oopsing just bail early.

We won't be able to tell whether the port is DP++ or not,
but so be it.

Cc: stable@vger.kernel.org
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/10464
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240319092443.15769-1-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Ville Syrjälä
2024-03-19 11:24:42 +02:00
parent c1289a5c35
commit 2641089620
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/display/intel_bios.c
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@@ -3458,6 +3458,9 @@ bool intel_bios_encoder_supports_dp_dual_mode(const struct intel_bios_encoder_da
{
const struct child_device_config *child = &devdata->child;
if (!devdata)
return false;
if (!intel_bios_encoder_supports_dp(devdata) ||
!intel_bios_encoder_supports_hdmi(devdata))
return false;