drm/i915: Split cursor alignment to per-platform vfuncs

Split intel_cursor_alignment() into per-platform variants.
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240612204712.31404-6-ville.syrjala@linux.intel.com

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

@@ -194,6 +194,13 @@ i845_cursor_max_stride(struct intel_plane *plane,
 	return 2048;
 }
 
+static unsigned int i845_cursor_min_alignment(struct intel_plane *plane,
+					      const struct drm_framebuffer *fb,
+					      int color_plane)
+{
+	return 32;
+}
+
 static u32 i845_cursor_ctl_crtc(const struct intel_crtc_state *crtc_state)
 {
 	u32 cntl = 0;
@@ -344,6 +351,28 @@ i9xx_cursor_max_stride(struct intel_plane *plane,
 	return plane->base.dev->mode_config.cursor_width * 4;
 }
 
+static unsigned int i830_cursor_min_alignment(struct intel_plane *plane,
+					      const struct drm_framebuffer *fb,
+					      int color_plane)
+{
+	/* "AlmadorM Errata – Requires 32-bpp cursor data to be 16KB aligned." */
+	return 16 * 1024; /* physical */
+}
+
+static unsigned int i85x_cursor_min_alignment(struct intel_plane *plane,
+					      const struct drm_framebuffer *fb,
+					      int color_plane)
+{
+	return 256; /* physical */
+}
+
+static unsigned int i9xx_cursor_min_alignment(struct intel_plane *plane,
+					      const struct drm_framebuffer *fb,
+					      int color_plane)
+{
+	return 4 * 1024; /* physical for i915/i945 */
+}
+
 static u32 i9xx_cursor_ctl_crtc(const struct intel_crtc_state *crtc_state)
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
@@ -942,20 +971,27 @@ intel_cursor_plane_create(struct drm_i915_private *dev_priv,
 
 	if (IS_I845G(dev_priv) || IS_I865G(dev_priv)) {
 		cursor->max_stride = i845_cursor_max_stride;
+		cursor->min_alignment = i845_cursor_min_alignment;
 		cursor->update_arm = i845_cursor_update_arm;
 		cursor->disable_arm = i845_cursor_disable_arm;
 		cursor->get_hw_state = i845_cursor_get_hw_state;
 		cursor->check_plane = i845_check_cursor;
 	} else {
 		cursor->max_stride = i9xx_cursor_max_stride;
+
+		if (IS_I830(dev_priv))
+			cursor->min_alignment = i830_cursor_min_alignment;
+		else if (IS_I85X(dev_priv))
+			cursor->min_alignment = i85x_cursor_min_alignment;
+		else
+			cursor->min_alignment = i9xx_cursor_min_alignment;
+
 		cursor->update_arm = i9xx_cursor_update_arm;
 		cursor->disable_arm = i9xx_cursor_disable_arm;
 		cursor->get_hw_state = i9xx_cursor_get_hw_state;
 		cursor->check_plane = i9xx_check_cursor;
 	}
 
-	cursor->min_alignment = intel_cursor_alignment;
-
 	cursor->cursor.base = ~0;
 	cursor->cursor.cntl = ~0;
 

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

@@ -777,22 +777,6 @@ bool intel_fb_uses_dpt(const struct drm_framebuffer *fb)
 		intel_fb_modifier_uses_dpt(to_i915(fb->dev), fb->modifier);
 }
 
-unsigned int intel_cursor_alignment(struct intel_plane *plane,
-				    const struct drm_framebuffer *fb,
-				    int color_plane)
-{
-	struct drm_i915_private *i915 = to_i915(plane->base.dev);
-
-	if (IS_I830(i915))
-		return 16 * 1024;
-	else if (IS_I85X(i915))
-		return 256;
-	else if (IS_I845G(i915) || IS_I865G(i915))
-		return 32;
-	else
-		return 4 * 1024;
-}
-
 static unsigned int intel_linear_alignment(const struct drm_i915_private *dev_priv)
 {
 	if (DISPLAY_VER(dev_priv) >= 9)

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

@@ -60,9 +60,6 @@ unsigned int intel_tile_height(const struct drm_framebuffer *fb, int color_plane
 unsigned int intel_tile_row_size(const struct drm_framebuffer *fb, int color_plane);
 unsigned int intel_fb_align_height(const struct drm_framebuffer *fb,
 				   int color_plane, unsigned int height);
-unsigned int intel_cursor_alignment(struct intel_plane *plane,
-				    const struct drm_framebuffer *fb,
-				    int color_plane);
 unsigned int intel_surf_alignment(struct intel_plane *plane,
 				  const struct drm_framebuffer *fb,
 				  int color_plane);