drm/mali-dp: Rotated planes need a larger pitch size.

Rotated planes need a pitch size that is aligned to 8 bytes
for older DP500 and DP550 and at least 64 bytes for DP650. Replace
the malidp_hw_pitch_valid() function with one that calculates
the correct pitch alignment to take into account rotation.
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>

drivers/gpu/drm/arm/malidp_hw.h

@@ -285,10 +285,16 @@ void malidp_se_irq_fini(struct drm_device *drm);
 u8 malidp_hw_get_format_id(const struct malidp_hw_regmap *map,
 			   u8 layer_id, u32 format);
 
-static inline bool malidp_hw_pitch_valid(struct malidp_hw_device *hwdev,
-					 unsigned int pitch)
+static inline u8 malidp_hw_get_pitch_align(struct malidp_hw_device *hwdev, bool rotated)
 {
-	return !(pitch & (hwdev->hw->map.bus_align_bytes - 1));
+	/*
+	 * only hardware that cannot do 8 bytes bus alignments have further
+	 * constraints on rotated planes
+	 */
+	if (hwdev->hw->map.bus_align_bytes == 8)
+		return 8;
+	else
+		return hwdev->hw->map.bus_align_bytes << (rotated ? 2 : 0);
 }
 
 /* U16.16 */

drivers/gpu/drm/arm/malidp_planes.c

@@ -175,6 +175,7 @@ static int malidp_de_plane_check(struct drm_plane *plane,
 {
 	struct malidp_plane *mp = to_malidp_plane(plane);
 	struct malidp_plane_state *ms = to_malidp_plane_state(state);
+	bool rotated = state->rotation & MALIDP_ROTATED_MASK;
 	struct drm_framebuffer *fb;
 	int i, ret;
 
@@ -191,7 +192,8 @@ static int malidp_de_plane_check(struct drm_plane *plane,
 
 	ms->n_planes = fb->format->num_planes;
 	for (i = 0; i < ms->n_planes; i++) {
-		if (!malidp_hw_pitch_valid(mp->hwdev, fb->pitches[i])) {
+		u8 alignment = malidp_hw_get_pitch_align(mp->hwdev, rotated);
+		if (fb->pitches[i] & (alignment - 1)) {
 			DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n",
 				      fb->pitches[i], i);
 			return -EINVAL;