msm: mdss: rotator: validate ubwc x and y offsets

For destination roi x and y offsets need to be validated for ubwc
formats to make sure that they align to the start of a tile.

Change-Id: I43c50401a212b624851fa0d7f1347fe313d19ca2
Signed-off-by: Terence Hampson <thampson@codeaurora.org>

drivers/video/fbdev/msm/mdss_mdp.h

@@ -1198,6 +1198,8 @@ int mdss_mdp_get_rau_strides(u32 w, u32 h, struct mdss_mdp_format_params *fmt,
 void mdss_mdp_data_calc_offset(struct mdss_mdp_data *data, u16 x, u16 y,
 	struct mdss_mdp_plane_sizes *ps, struct mdss_mdp_format_params *fmt);
 struct mdss_mdp_format_params *mdss_mdp_get_format_params(u32 format);
+int mdss_mdp_validate_offset_for_ubwc_format(
+	struct mdss_mdp_format_params *fmt, u16 x, u16 y);
 void mdss_mdp_get_v_h_subsample_rate(u8 chroma_samp,
 	u8 *v_sample, u8 *h_sample);
 struct mult_factor *mdss_mdp_get_comp_factor(u32 format,

drivers/video/fbdev/msm/mdss_mdp_formats.h

@@ -31,7 +31,7 @@ enum {
 	COLOR_ALPHA_4BIT = 1,
 };
 
-#define UBWC_META_MACRO_W 16
+#define UBWC_META_MACRO_W_H 16
 #define UBWC_META_BLOCK_SIZE 256
 
 #define FMT_RGB_565(fmt, fetch_type, flag_arg, e0, e1, e2)		\

drivers/video/fbdev/msm/mdss_mdp_util.c

@@ -804,6 +804,32 @@ int mdss_mdp_data_check(struct mdss_mdp_data *data,
 	return 0;
 }
 
+int mdss_mdp_validate_offset_for_ubwc_format(
+	struct mdss_mdp_format_params *fmt, u16 x, u16 y)
+{
+	int ret;
+	u16 micro_w, micro_h;
+
+	ret = mdss_mdp_get_ubwc_micro_dim(fmt->format, &micro_w, &micro_h);
+	if (ret || !micro_w || !micro_h) {
+		pr_err("Could not get valid micro tile dimensions\n");
+		return -EINVAL;
+	}
+
+	if (x % (micro_w * UBWC_META_MACRO_W_H)) {
+		pr_err("x=%d does not align with meta width=%d\n", x,
+			micro_w * UBWC_META_MACRO_W_H);
+		return -EINVAL;
+	}
+
+	if (y % (UBWC_META_MACRO_W_H)) {
+		pr_err("y=%d does not align with meta height=%d\n", y,
+			UBWC_META_MACRO_W_H);
+		return -EINVAL;
+	}
+	return ret;
+}
+
 /* x and y are assumednt to be valid, expected to line up with start of tiles */
 void mdss_mdp_ubwc_data_calc_offset(struct mdss_mdp_data *data, u16 x, u16 y,
 	struct mdss_mdp_plane_sizes *ps, struct mdss_mdp_format_params *fmt)
@@ -850,7 +876,7 @@ void mdss_mdp_ubwc_data_calc_offset(struct mdss_mdp_data *data, u16 x, u16 y,
 		}
 
 		offset = (y / 8) * ps->ystride[2] +
-			((x / micro_w) / UBWC_META_MACRO_W) *
+			((x / micro_w) / UBWC_META_MACRO_W_H) *
 			UBWC_META_BLOCK_SIZE;
 		if (offset < data->p[2].len) {
 			data->p[2].addr += offset;
@@ -860,7 +886,7 @@ void mdss_mdp_ubwc_data_calc_offset(struct mdss_mdp_data *data, u16 x, u16 y,
 		}
 
 		offset = ((y / 2) / 8) * ps->ystride[3] +
-			(((x / 2) / chroma_micro_w) / UBWC_META_MACRO_W) *
+			(((x / 2) / chroma_micro_w) / UBWC_META_MACRO_W_H) *
 			UBWC_META_BLOCK_SIZE;
 		if (offset < data->p[3].len) {
 			data->p[3].addr += offset;
@@ -880,7 +906,7 @@ void mdss_mdp_ubwc_data_calc_offset(struct mdss_mdp_data *data, u16 x, u16 y,
 		}
 
 		offset = DIV_ROUND_UP(y, 8) * ps->ystride[2] +
-			((x / micro_w) / UBWC_META_MACRO_W) *
+			((x / micro_w) / UBWC_META_MACRO_W_H) *
 			UBWC_META_BLOCK_SIZE;
 		if (offset < data->p[2].len) {
 			data->p[2].addr += offset;

drivers/video/fbdev/msm/mdss_rotator.c

@@ -1335,18 +1335,34 @@ static int mdss_rotator_validate_item_matches_session(
 	return 0;
 }
 
+/* Only need to validate x and y offset for ubwc dst fmt */
+static int mdss_rotator_validate_img_roi(struct mdp_rotation_item *item)
+{
+	struct mdss_mdp_format_params *fmt;
+	int ret = 0;
+
+	fmt = mdss_mdp_get_format_params(item->input.format);
+	if (!fmt) {
+		pr_err("invalid input format:%d\n", item->input.format);
+		return -EINVAL;
+	}
+
+	if (mdss_mdp_is_ubwc_format(fmt))
+		ret = mdss_mdp_validate_offset_for_ubwc_format(fmt,
+			item->dst_rect.x, item->dst_rect.y);
+
+	return ret;
+}
+
 static int mdss_rotator_validate_entry(struct mdss_rot_mgr *mgr,
 	struct mdss_rot_file_private *private,
 	struct mdss_rot_entry *entry)
 {
 	int ret;
-	u32 out_format, in_format;
 	struct mdp_rotation_item *item;
 	struct mdss_rot_perf *perf;
 
 	item = &entry->item;
-	in_format = item->input.format;
-	out_format = item->output.format;
 
 	if (item->wb_idx != item->pipe_idx) {
 		pr_err("invalid writeback and pipe idx\n");
@@ -1372,6 +1388,12 @@ static int mdss_rotator_validate_entry(struct mdss_rot_mgr *mgr,
 		return ret;
 	}
 
+	ret = mdss_rotator_validate_img_roi(item);
+	if (ret) {
+		pr_err("Image roi is invalid\n");
+		return ret;
+	}
+
 	ret = mdss_rotator_config_dnsc_factor(mgr, entry);
 	if (ret) {
 		pr_err("fail to configure downscale factor\n");