[Intel-gfx] [PATCH] drm/i915/sdvo: fix panel_type initialization

[Jani Nikula]

On Fri, 04 Aug 2023, "Shankar, Uma" <uma.shankar at intel.com> wrote:
>> -----Original Message-----
>> From: Intel-gfx <intel-gfx-bounces at lists.freedesktop.org> On Behalf Of Jani Nikula
>> Sent: Thursday, August 3, 2023 5:57 PM
>> To: intel-gfx at lists.freedesktop.org
>> Cc: Nikula, Jani <jani.nikula at intel.com>; Tomi Leppänen <tomi at tomin.site>;
>> stable at vger.kernel.org
>> Subject: [Intel-gfx] [PATCH] drm/i915/sdvo: fix panel_type initialization
>>
>> Commit 3f9ffce5765d ("drm/i915: Do panel VBT init early if the VBT declares an
>> explicit panel type") started using -1 as the value for unset panel_type. It gets
>> initialized in intel_panel_init_alloc(), but the SDVO code never calls it.
>>
>> Call intel_panel_init_alloc() to initialize the panel, including the panel_type.
>
> Change looks good to me. Thanks Jani for identifying the root cause and fixing the issue.
> Reviewed-by: Uma Shankar <uma.shankar at intel.com>

Thanks, pushed to drm-intel-next.

BR,
Jani.

>
>> Reported-by: Tomi Leppänen <tomi at tomin.site>
>> Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/8896
>> Fixes: 3f9ffce5765d ("drm/i915: Do panel VBT init early if the VBT declares an explicit
>> panel type")
>> Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
>> Cc: <stable at vger.kernel.org> # v6.1+
>> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
>> ---
>>  drivers/gpu/drm/i915/display/intel_sdvo.c | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_sdvo.c
>> b/drivers/gpu/drm/i915/display/intel_sdvo.c
>> index 8298a86d1334..b4faf97936b9 100644
>> --- a/drivers/gpu/drm/i915/display/intel_sdvo.c
>> +++ b/drivers/gpu/drm/i915/display/intel_sdvo.c
>> @@ -2752,7 +2752,7 @@ static struct intel_sdvo_connector
>> *intel_sdvo_connector_alloc(void)
>>       __drm_atomic_helper_connector_reset(&sdvo_connector->base.base,
>>                                           &conn_state->base.base);
>>
>> -     INIT_LIST_HEAD(&sdvo_connector->base.panel.fixed_modes);
>> +     intel_panel_init_alloc(&sdvo_connector->base);
>>
>>       return sdvo_connector;
>>  }
>> --
>> 2.39.2
>

-- 
Jani Nikula, Intel Open Source Graphics Center