On Sun, 20 Feb 2022, Anshuman Gupta <[email protected]> wrote:
> DGFX ASLS and OPROM OpRegion are only supported on the GFX Cards,
> which supports Display Engine. Register opregion function accordingly
> using the HAS_DISPLAY(). And early return intel_opregion_setup()
> if no opregion func to avoid NULL pointer oops.
>
> v2:
> - Change the commit log.
>
> Cc: Badal Nilawar <[email protected]>
> Cc: Jani Nikula <[email protected]>
> Cc: Uma Shankar <[email protected]>
> Signed-off-by: Anshuman Gupta <[email protected]>
> ---
> drivers/gpu/drm/i915/display/intel_opregion.c | 7 +++++--
> 1 file changed, 5 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_opregion.c
> b/drivers/gpu/drm/i915/display/intel_opregion.c
> index eca2d3a4f72b..562161a929d6 100644
> --- a/drivers/gpu/drm/i915/display/intel_opregion.c
> +++ b/drivers/gpu/drm/i915/display/intel_opregion.c
> @@ -894,6 +894,9 @@ static int intel_opregion_setup(struct drm_i915_private
> *dev_priv)
> BUILD_BUG_ON(sizeof(struct opregion_asle) != 0x100);
> BUILD_BUG_ON(sizeof(struct opregion_asle_ext) != 0x400);
>
> + if (!opregion->opregion_func)
> + return 0;
> +
> INIT_WORK(&opregion->asle_work, asle_work);
>
> base = opregion->opregion_func->alloc_opregion(dev_priv);
> @@ -1348,9 +1351,9 @@ int intel_opregion_init(struct drm_i915_private *i915)
> {
> struct intel_opregion *opregion = &i915->opregion;
>
> - if (IS_DGFX(i915))
> + if (IS_DGFX(i915) && HAS_DISPLAY(i915))
> opregion->opregion_func = &dgfx_opregion_func;
> - else
> + else if (!IS_DGFX(i915))
> opregion->opregion_func = &igfx_opregion_func;
IOW, and IMO much clearer:
if (dgfx) {
if (has_dislay)
...
} else {
...
}
>
> return intel_opregion_setup(i915);
--
Jani Nikula, Intel Open Source Graphics Center
