[PATCH v2 2/3] drm/vc4: plane: Add support for DRM_FORMAT_P030
Maxime Ripard
maxime at cerno.tech
Mon Dec 6 11:01:39 UTC 2021
From: Dave Stevenson <dave.stevenson at raspberrypi.com>
The P030 format, used with the DRM_FORMAT_MOD_BROADCOM_SAND128 modifier,
is a format output by the video decoder on the BCM2711.
Add native support to the KMS planes for that format.
Signed-off-by: Dave Stevenson <dave.stevenson at raspberrypi.com>
Signed-off-by: Maxime Ripard <maxime at cerno.tech>
---
drivers/gpu/drm/vc4/vc4_plane.c | 128 ++++++++++++++++++++++++--------
1 file changed, 97 insertions(+), 31 deletions(-)
diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
index ac761c683663..18627b240a55 100644
--- a/drivers/gpu/drm/vc4/vc4_plane.c
+++ b/drivers/gpu/drm/vc4/vc4_plane.c
@@ -33,6 +33,7 @@ static const struct hvs_format {
u32 hvs; /* HVS_FORMAT_* */
u32 pixel_order;
u32 pixel_order_hvs5;
+ bool hvs5_only;
} hvs_formats[] = {
{
.drm = DRM_FORMAT_XRGB8888,
@@ -128,6 +129,12 @@ static const struct hvs_format {
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_2PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
},
+ {
+ .drm = DRM_FORMAT_P030,
+ .hvs = HVS_PIXEL_FORMAT_YCBCR_10BIT,
+ .pixel_order = HVS_PIXEL_ORDER_XYCBCR,
+ .hvs5_only = true,
+ },
};
static const struct hvs_format *vc4_get_hvs_format(u32 drm_format)
@@ -762,47 +769,91 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
case DRM_FORMAT_MOD_BROADCOM_SAND128:
case DRM_FORMAT_MOD_BROADCOM_SAND256: {
uint32_t param = fourcc_mod_broadcom_param(fb->modifier);
- u32 tile_w, tile, x_off, pix_per_tile;
-
- hvs_format = HVS_PIXEL_FORMAT_H264;
-
- switch (base_format_mod) {
- case DRM_FORMAT_MOD_BROADCOM_SAND64:
- tiling = SCALER_CTL0_TILING_64B;
- tile_w = 64;
- break;
- case DRM_FORMAT_MOD_BROADCOM_SAND128:
- tiling = SCALER_CTL0_TILING_128B;
- tile_w = 128;
- break;
- case DRM_FORMAT_MOD_BROADCOM_SAND256:
- tiling = SCALER_CTL0_TILING_256B_OR_T;
- tile_w = 256;
- break;
- default:
- break;
- }
if (param > SCALER_TILE_HEIGHT_MASK) {
- DRM_DEBUG_KMS("SAND height too large (%d)\n", param);
+ DRM_DEBUG_KMS("SAND height too large (%d)\n",
+ param);
return -EINVAL;
}
- pix_per_tile = tile_w / fb->format->cpp[0];
- tile = vc4_state->src_x / pix_per_tile;
- x_off = vc4_state->src_x % pix_per_tile;
+ if (fb->format->format == DRM_FORMAT_P030) {
+ hvs_format = HVS_PIXEL_FORMAT_YCBCR_10BIT;
+ tiling = SCALER_CTL0_TILING_128B;
+ } else {
+ hvs_format = HVS_PIXEL_FORMAT_H264;
+
+ switch (base_format_mod) {
+ case DRM_FORMAT_MOD_BROADCOM_SAND64:
+ tiling = SCALER_CTL0_TILING_64B;
+ break;
+ case DRM_FORMAT_MOD_BROADCOM_SAND128:
+ tiling = SCALER_CTL0_TILING_128B;
+ break;
+ case DRM_FORMAT_MOD_BROADCOM_SAND256:
+ tiling = SCALER_CTL0_TILING_256B_OR_T;
+ break;
+ default:
+ return -EINVAL;
+ break;
+ }
+ }
/* Adjust the base pointer to the first pixel to be scanned
* out.
+ *
+ * For P030, y_ptr [31:4] is the 128bit word for the start pixel
+ * y_ptr [3:0] is the pixel (0-11) contained within that 128bit
+ * word that should be taken as the first pixel.
+ * Ditto uv_ptr [31:4] vs [3:0], however [3:0] contains the
+ * element within the 128bit word, eg for pixel 3 the value
+ * should be 6.
*/
for (i = 0; i < num_planes; i++) {
+ u32 tile_w, tile, x_off, pix_per_tile;
+
+ if (fb->format->format == DRM_FORMAT_P030) {
+ /*
+ * Spec says: bits [31:4] of the given address
+ * should point to the 128-bit word containing
+ * the desired starting pixel, and bits[3:0]
+ * should be between 0 and 11, indicating which
+ * of the 12-pixels in that 128-bit word is the
+ * first pixel to be used
+ */
+ u32 remaining_pixels = vc4_state->src_x % 96;
+ u32 aligned = remaining_pixels / 12;
+ u32 last_bits = remaining_pixels % 12;
+
+ x_off = aligned * 16 + last_bits;
+ tile_w = 128;
+ pix_per_tile = 96;
+ } else {
+ switch (base_format_mod) {
+ case DRM_FORMAT_MOD_BROADCOM_SAND64:
+ tile_w = 64;
+ break;
+ case DRM_FORMAT_MOD_BROADCOM_SAND128:
+ tile_w = 128;
+ break;
+ case DRM_FORMAT_MOD_BROADCOM_SAND256:
+ tile_w = 256;
+ break;
+ default:
+ break;
+ }
+ pix_per_tile = tile_w / fb->format->cpp[0];
+ x_off = (vc4_state->src_x % pix_per_tile) /
+ (i ? h_subsample : 1) *
+ fb->format->cpp[i];
+ }
+
+ tile = vc4_state->src_x / pix_per_tile;
+
vc4_state->offsets[i] += param * tile_w * tile;
vc4_state->offsets[i] += src_y /
(i ? v_subsample : 1) *
tile_w;
- vc4_state->offsets[i] += x_off /
- (i ? h_subsample : 1) *
- fb->format->cpp[i];
+ vc4_state->offsets[i] += x_off & ~(i ? 1 : 0);
}
pitch0 = VC4_SET_FIELD(param, SCALER_TILE_HEIGHT);
@@ -955,7 +1006,8 @@ static int vc4_plane_mode_set(struct drm_plane *plane,
/* Pitch word 1/2 */
for (i = 1; i < num_planes; i++) {
- if (hvs_format != HVS_PIXEL_FORMAT_H264) {
+ if (hvs_format != HVS_PIXEL_FORMAT_H264 &&
+ hvs_format != HVS_PIXEL_FORMAT_YCBCR_10BIT) {
vc4_dlist_write(vc4_state,
VC4_SET_FIELD(fb->pitches[i],
SCALER_SRC_PITCH));
@@ -1315,6 +1367,13 @@ static bool vc4_format_mod_supported(struct drm_plane *plane,
default:
return false;
}
+ case DRM_FORMAT_P030:
+ switch (fourcc_mod_broadcom_mod(modifier)) {
+ case DRM_FORMAT_MOD_BROADCOM_SAND128:
+ return true;
+ default:
+ return false;
+ }
case DRM_FORMAT_RGBX1010102:
case DRM_FORMAT_BGRX1010102:
case DRM_FORMAT_RGBA1010102:
@@ -1347,8 +1406,11 @@ struct drm_plane *vc4_plane_init(struct drm_device *dev,
struct drm_plane *plane = NULL;
struct vc4_plane *vc4_plane;
u32 formats[ARRAY_SIZE(hvs_formats)];
+ int num_formats = 0;
int ret = 0;
unsigned i;
+ bool hvs5 = of_device_is_compatible(dev->dev->of_node,
+ "brcm,bcm2711-vc5");
static const uint64_t modifiers[] = {
DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED,
DRM_FORMAT_MOD_BROADCOM_SAND128,
@@ -1363,13 +1425,17 @@ struct drm_plane *vc4_plane_init(struct drm_device *dev,
if (!vc4_plane)
return ERR_PTR(-ENOMEM);
- for (i = 0; i < ARRAY_SIZE(hvs_formats); i++)
- formats[i] = hvs_formats[i].drm;
+ for (i = 0; i < ARRAY_SIZE(hvs_formats); i++) {
+ if (!hvs_formats[i].hvs5_only || hvs5) {
+ formats[num_formats] = hvs_formats[i].drm;
+ num_formats++;
+ }
+ }
plane = &vc4_plane->base;
ret = drm_universal_plane_init(dev, plane, 0,
&vc4_plane_funcs,
- formats, ARRAY_SIZE(formats),
+ formats, num_formats,
modifiers, type, NULL);
if (ret)
return ERR_PTR(ret);
--
2.33.1
More information about the dri-devel
mailing list