drm/i915: Nuke intel_plane_config.tiling

Use intel_fb_modifier_to_tiling() to convert the modifier into
the fence tiling mode during BIOS FB readout, rather than hand
rolling it. With this we can also stop tracking the tiling mode
in the intel_plane_config.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patch.msgid.link/20251107181126.5743-5-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

Author: vsyrjala

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

@@ -1188,10 +1188,8 @@ i9xx_get_initial_plane_config(struct intel_crtc *crtc,
 	val = intel_de_read(display, DSPCNTR(display, i9xx_plane));
 
 	if (DISPLAY_VER(display) >= 4) {
-		if (val & DISP_TILED) {
-			plane_config->tiling = I915_TILING_X;
+		if (val & DISP_TILED)
 			fb->modifier = I915_FORMAT_MOD_X_TILED;
-		}
 
 		if (val & DISP_ROTATE_180)
 			plane_config->rotation = DRM_MODE_ROTATE_180;
@@ -1211,7 +1209,7 @@ i9xx_get_initial_plane_config(struct intel_crtc *crtc,
 				       DSPOFFSET(display, i9xx_plane));
 		base = intel_de_read(display, DSPSURF(display, i9xx_plane)) & DISP_ADDR_MASK;
 	} else if (DISPLAY_VER(display) >= 4) {
-		if (plane_config->tiling)
+		if (fb->modifier == I915_FORMAT_MOD_X_TILED)
 			offset = intel_de_read(display,
 					       DSPTILEOFF(display, i9xx_plane));
 		else

drivers/gpu/drm/i915/display/intel_display_types.h

@@ -726,7 +726,6 @@ struct intel_initial_plane_config {
 	struct intel_memory_region *mem;
 	resource_size_t phys_base;
 	struct i915_vma *vma;
-	unsigned int tiling;
 	int size;
 	u32 base;
 	u8 rotation;

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

@@ -133,6 +133,7 @@ initial_plane_vma(struct intel_display *display,
 	struct drm_mm_node orig_mm = {};
 	struct i915_vma *vma;
 	resource_size_t phys_base;
+	unsigned int tiling;
 	u32 base, size;
 	u64 pinctl;
 
@@ -179,17 +180,19 @@ initial_plane_vma(struct intel_display *display,
 	i915_gem_object_set_cache_coherency(obj, HAS_WT(i915) ?
 					    I915_CACHE_WT : I915_CACHE_NONE);
 
-	switch (plane_config->tiling) {
+	tiling = intel_fb_modifier_to_tiling(plane_config->fb->base.modifier);
+
+	switch (tiling) {
 	case I915_TILING_NONE:
 		break;
 	case I915_TILING_X:
 	case I915_TILING_Y:
 		obj->tiling_and_stride =
 			plane_config->fb->base.pitches[0] |
-			plane_config->tiling;
+			tiling;
 		break;
 	default:
-		MISSING_CASE(plane_config->tiling);
+		MISSING_CASE(tiling);
 		goto err_obj;
 	}
 
@@ -374,7 +377,7 @@ intel_find_initial_plane_obj(struct intel_crtc *crtc,
 	plane_state->uapi.crtc_w = fb->width;
 	plane_state->uapi.crtc_h = fb->height;
 
-	if (plane_config->tiling)
+	if (fb->modifier != DRM_FORMAT_MOD_LINEAR)
 		dev_priv->preserve_bios_swizzle = true;
 
 	plane_state->uapi.fb = fb;

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

@@ -3090,11 +3090,9 @@ skl_get_initial_plane_config(struct intel_crtc *crtc,
 		fb->modifier = DRM_FORMAT_MOD_LINEAR;
 		break;
 	case PLANE_CTL_TILED_X:
-		plane_config->tiling = I915_TILING_X;
 		fb->modifier = I915_FORMAT_MOD_X_TILED;
 		break;
 	case PLANE_CTL_TILED_Y:
-		plane_config->tiling = I915_TILING_Y;
 		if (val & PLANE_CTL_RENDER_DECOMPRESSION_ENABLE)
 			if (DISPLAY_VER(display) >= 14)
 				fb->modifier = I915_FORMAT_MOD_4_TILED_MTL_RC_CCS;