[RESEND 1/2] drm/i915/gvt: stop using drm_edid_block_valid()

[Zhenyu Wang]

On 2024.08.12 17:28:48 +0300, Jani Nikula wrote:
> We'll want to stop drm_edid_block_valid() usage. KVMGT is the last
> user. Replace with drm_edid_valid(), which unfortunately requires an
> allocated drm_edid. However, on the plus side, this would be required to
> handle the TODO comment about EDID extension block support.
> 
> Acked-by: Zhi Wang <zhiwang at kernel.rog>
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
>

Looks fine to me. Feel free to merge.

Reviewed-by: Zhenyu Wang <zhenyuw at linux.intel.com>

> ---
> 
> Cc: Zhenyu Wang <zhenyuw at linux.intel.com>
> Cc: Zhi Wang <zhi.wang.linux at gmail.com>
> Cc: intel-gvt-dev at lists.freedesktop.org
> Cc: intel-gfx at lists.freedesktop.org
> Cc: dri-devel at lists.freedesktop.org
> ---
>  drivers/gpu/drm/i915/gvt/kvmgt.c | 18 +++++++++++++-----
>  1 file changed, 13 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
> index 38830818c120..ca0fb126b02d 100644
> --- a/drivers/gpu/drm/i915/gvt/kvmgt.c
> +++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
> @@ -425,6 +425,18 @@ static const struct intel_vgpu_regops intel_vgpu_regops_opregion = {
>  	.release = intel_vgpu_reg_release_opregion,
>  };
>  
> +static bool edid_valid(const void *edid, size_t size)
> +{
> +	const struct drm_edid *drm_edid;
> +	bool is_valid;
> +
> +	drm_edid = drm_edid_alloc(edid, size);
> +	is_valid = drm_edid_valid(drm_edid);
> +	drm_edid_free(drm_edid);
> +
> +	return is_valid;
> +}
> +
>  static int handle_edid_regs(struct intel_vgpu *vgpu,
>  			struct vfio_edid_region *region, char *buf,
>  			size_t count, u16 offset, bool is_write)
> @@ -443,11 +455,7 @@ static int handle_edid_regs(struct intel_vgpu *vgpu,
>  		switch (offset) {
>  		case offsetof(struct vfio_region_gfx_edid, link_state):
>  			if (data == VFIO_DEVICE_GFX_LINK_STATE_UP) {
> -				if (!drm_edid_block_valid(
> -					(u8 *)region->edid_blob,
> -					0,
> -					true,
> -					NULL)) {
> +				if (!edid_valid(region->edid_blob, EDID_SIZE)) {
>  					gvt_vgpu_err("invalid EDID blob\n");
>  					return -EINVAL;
>  				}
> -- 
> 2.39.2
> 
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