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path: root/drivers/gpu/drm/exynos/exynos_drm_g2d.c
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Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_g2d.c')
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_g2d.c65
1 files changed, 41 insertions, 24 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_g2d.c b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
index 81a250830808..535b4ad6c4b1 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_g2d.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_g2d.c
@@ -48,11 +48,13 @@
/* registers for base address */
#define G2D_SRC_BASE_ADDR 0x0304
+#define G2D_SRC_STRIDE_REG 0x0308
#define G2D_SRC_COLOR_MODE 0x030C
#define G2D_SRC_LEFT_TOP 0x0310
#define G2D_SRC_RIGHT_BOTTOM 0x0314
#define G2D_SRC_PLANE2_BASE_ADDR 0x0318
#define G2D_DST_BASE_ADDR 0x0404
+#define G2D_DST_STRIDE_REG 0x0408
#define G2D_DST_COLOR_MODE 0x040C
#define G2D_DST_LEFT_TOP 0x0410
#define G2D_DST_RIGHT_BOTTOM 0x0414
@@ -148,6 +150,7 @@ struct g2d_cmdlist {
* A structure of buffer description
*
* @format: color format
+ * @stride: buffer stride/pitch in bytes
* @left_x: the x coordinates of left top corner
* @top_y: the y coordinates of left top corner
* @right_x: the x coordinates of right bottom corner
@@ -156,6 +159,7 @@ struct g2d_cmdlist {
*/
struct g2d_buf_desc {
unsigned int format;
+ unsigned int stride;
unsigned int left_x;
unsigned int top_y;
unsigned int right_x;
@@ -589,6 +593,7 @@ static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
switch (reg_offset) {
case G2D_SRC_BASE_ADDR:
+ case G2D_SRC_STRIDE_REG:
case G2D_SRC_COLOR_MODE:
case G2D_SRC_LEFT_TOP:
case G2D_SRC_RIGHT_BOTTOM:
@@ -598,6 +603,7 @@ static enum g2d_reg_type g2d_get_reg_type(int reg_offset)
reg_type = REG_TYPE_SRC_PLANE2;
break;
case G2D_DST_BASE_ADDR:
+ case G2D_DST_STRIDE_REG:
case G2D_DST_COLOR_MODE:
case G2D_DST_LEFT_TOP:
case G2D_DST_RIGHT_BOTTOM:
@@ -652,8 +658,8 @@ static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
enum g2d_reg_type reg_type,
unsigned long size)
{
- unsigned int width, height;
- unsigned long area;
+ int width, height;
+ unsigned long bpp, last_pos;
/*
* check source and destination buffers only.
@@ -662,22 +668,37 @@ static bool g2d_check_buf_desc_is_valid(struct g2d_buf_desc *buf_desc,
if (reg_type != REG_TYPE_SRC && reg_type != REG_TYPE_DST)
return true;
- width = buf_desc->right_x - buf_desc->left_x;
+ /* This check also makes sure that right_x > left_x. */
+ width = (int)buf_desc->right_x - (int)buf_desc->left_x;
if (width < G2D_LEN_MIN || width > G2D_LEN_MAX) {
- DRM_ERROR("width[%u] is out of range!\n", width);
+ DRM_ERROR("width[%d] is out of range!\n", width);
return false;
}
- height = buf_desc->bottom_y - buf_desc->top_y;
+ /* This check also makes sure that bottom_y > top_y. */
+ height = (int)buf_desc->bottom_y - (int)buf_desc->top_y;
if (height < G2D_LEN_MIN || height > G2D_LEN_MAX) {
- DRM_ERROR("height[%u] is out of range!\n", height);
+ DRM_ERROR("height[%d] is out of range!\n", height);
return false;
}
- area = (unsigned long)width * (unsigned long)height *
- g2d_get_buf_bpp(buf_desc->format);
- if (area > size) {
- DRM_ERROR("area[%lu] is out of range[%lu]!\n", area, size);
+ bpp = g2d_get_buf_bpp(buf_desc->format);
+
+ /* Compute the position of the last byte that the engine accesses. */
+ last_pos = ((unsigned long)buf_desc->bottom_y - 1) *
+ (unsigned long)buf_desc->stride +
+ (unsigned long)buf_desc->right_x * bpp - 1;
+
+ /*
+ * Since right_x > left_x and bottom_y > top_y we already know
+ * that the first_pos < last_pos (first_pos being the position
+ * of the first byte the engine accesses), it just remains to
+ * check if last_pos is smaller then the buffer size.
+ */
+
+ if (last_pos >= size) {
+ DRM_ERROR("last engine access position [%lu] "
+ "is out of range [%lu]!\n", last_pos, size);
return false;
}
@@ -973,8 +994,6 @@ static int g2d_check_reg_offset(struct device *dev,
goto err;
reg_type = g2d_get_reg_type(reg_offset);
- if (reg_type == REG_TYPE_NONE)
- goto err;
/* check userptr buffer type. */
if ((cmdlist->data[index] & ~0x7fffffff) >> 31) {
@@ -983,14 +1002,22 @@ static int g2d_check_reg_offset(struct device *dev,
} else
buf_info->types[reg_type] = BUF_TYPE_GEM;
break;
+ case G2D_SRC_STRIDE_REG:
+ case G2D_DST_STRIDE_REG:
+ if (for_addr)
+ goto err;
+
+ reg_type = g2d_get_reg_type(reg_offset);
+
+ buf_desc = &buf_info->descs[reg_type];
+ buf_desc->stride = cmdlist->data[index + 1];
+ break;
case G2D_SRC_COLOR_MODE:
case G2D_DST_COLOR_MODE:
if (for_addr)
goto err;
reg_type = g2d_get_reg_type(reg_offset);
- if (reg_type == REG_TYPE_NONE)
- goto err;
buf_desc = &buf_info->descs[reg_type];
value = cmdlist->data[index + 1];
@@ -1003,8 +1030,6 @@ static int g2d_check_reg_offset(struct device *dev,
goto err;
reg_type = g2d_get_reg_type(reg_offset);
- if (reg_type == REG_TYPE_NONE)
- goto err;
buf_desc = &buf_info->descs[reg_type];
value = cmdlist->data[index + 1];
@@ -1018,8 +1043,6 @@ static int g2d_check_reg_offset(struct device *dev,
goto err;
reg_type = g2d_get_reg_type(reg_offset);
- if (reg_type == REG_TYPE_NONE)
- goto err;
buf_desc = &buf_info->descs[reg_type];
value = cmdlist->data[index + 1];
@@ -1319,9 +1342,6 @@ static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
return ret;
}
- if (!is_drm_iommu_supported(drm_dev))
- return 0;
-
ret = drm_iommu_attach_device(drm_dev, dev);
if (ret < 0) {
dev_err(dev, "failed to enable iommu.\n");
@@ -1334,9 +1354,6 @@ static int g2d_subdrv_probe(struct drm_device *drm_dev, struct device *dev)
static void g2d_subdrv_remove(struct drm_device *drm_dev, struct device *dev)
{
- if (!is_drm_iommu_supported(drm_dev))
- return;
-
drm_iommu_detach_device(drm_dev, dev);
}