drm/i915: Populate fb->format accurately in BIOS FB readout

Use drm_get_format_info() instead of drm_format_info() to populate
fb->format during the BIOS FB readout. The difference being that
drm_get_format_info() knows about compressed formats whereas
drm_format_info() doesn't.

This doesn't actually matter in practice since the BIOS FB should
never be compressed, but no reason we shouldn't use the more accurate
function here anyway.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20251107181126.5743-4-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

Author: vsyrjala

drivers/gpu/drm/i915/display/i9xx_plane.c

@@ -1203,7 +1203,8 @@ i9xx_get_initial_plane_config(struct intel_crtc *crtc,
 
 	pixel_format = val & DISP_FORMAT_MASK;
 	fourcc = i9xx_format_to_fourcc(pixel_format);
-	fb->format = drm_format_info(fourcc);
+
+	fb->format = drm_get_format_info(display->drm, fourcc, fb->modifier);
 
 	if (display->platform.haswell || display->platform.broadwell) {
 		offset = intel_de_read(display,

drivers/gpu/drm/i915/display/skl_universal_plane.c

@@ -3083,7 +3083,6 @@ skl_get_initial_plane_config(struct intel_crtc *crtc,
 
 	fourcc = skl_format_to_fourcc(pixel_format,
 				      val & PLANE_CTL_ORDER_RGBX, alpha);
-	fb->format = drm_format_info(fourcc);
 
 	tiling = val & PLANE_CTL_TILED_MASK;
 	switch (tiling) {
@@ -3136,6 +3135,8 @@ skl_get_initial_plane_config(struct intel_crtc *crtc,
 		goto error;
 	}
 
+	fb->format = drm_get_format_info(display->drm, fourcc, fb->modifier);
+
 	if (!display->params.enable_dpt &&
 	    intel_fb_modifier_uses_dpt(display, fb->modifier)) {
 		drm_dbg_kms(display->drm, "DPT disabled, skipping initial FB\n");