[PATCH v2] media: hantro: Use post processor scaling capacities
Benjamin Gaignard
benjamin.gaignard at collabora.com
Mon Apr 4 09:06:40 PDT 2022
Hantro G2 post processor is able to down scale decoded frames
by a factor of 2, 4 or 8.
Add enum_framesizes() ops to postproc_ops structure to enumerate the
possible output sizes for a given input resolution.
For G2 post-processor use fsize->index (from 0 to 3) as power of 2
divisor. As described in v4l2 documentation return -EINVAL when scaling
down isn't possible.
fluster scores:
77/147 for HEVC
143/303 for VP9
Signed-off-by: Benjamin Gaignard <benjamin.gaignard at collabora.com>
---
version 2:
- fix commit message
- add fluster scores for HEVC and VP9
drivers/staging/media/hantro/hantro.h | 2 +
drivers/staging/media/hantro/hantro_g2_regs.h | 6 +++
drivers/staging/media/hantro/hantro_hw.h | 8 ++-
.../staging/media/hantro/hantro_postproc.c | 53 ++++++++++++++++++-
drivers/staging/media/hantro/hantro_v4l2.c | 15 +++---
5 files changed, 72 insertions(+), 12 deletions(-)
diff --git a/drivers/staging/media/hantro/hantro.h b/drivers/staging/media/hantro/hantro.h
index 357f83b86809..26308bb29adc 100644
--- a/drivers/staging/media/hantro/hantro.h
+++ b/drivers/staging/media/hantro/hantro.h
@@ -475,5 +475,7 @@ void hantro_postproc_disable(struct hantro_ctx *ctx);
void hantro_postproc_enable(struct hantro_ctx *ctx);
void hantro_postproc_free(struct hantro_ctx *ctx);
int hantro_postproc_alloc(struct hantro_ctx *ctx);
+int hanto_postproc_enum_framesizes(struct hantro_ctx *ctx,
+ struct v4l2_frmsizeenum *fsize);
#endif /* HANTRO_H_ */
diff --git a/drivers/staging/media/hantro/hantro_g2_regs.h b/drivers/staging/media/hantro/hantro_g2_regs.h
index b7c6f9877b9d..877d663a8181 100644
--- a/drivers/staging/media/hantro/hantro_g2_regs.h
+++ b/drivers/staging/media/hantro/hantro_g2_regs.h
@@ -290,6 +290,10 @@
#define g2_buswidth G2_DEC_REG(58, 8, 0x7)
#define g2_max_burst G2_DEC_REG(58, 0, 0xff)
+#define g2_down_scale_e G2_DEC_REG(184, 7, 0x1)
+#define g2_down_scale_y G2_DEC_REG(184, 2, 0x3)
+#define g2_down_scale_x G2_DEC_REG(184, 0, 0x3)
+
#define G2_REG_CONFIG G2_SWREG(58)
#define G2_REG_CONFIG_DEC_CLK_GATE_E BIT(16)
#define G2_REG_CONFIG_DEC_CLK_GATE_IDLE_E BIT(17)
@@ -312,6 +316,8 @@
#define G2_TILE_FILTER_ADDR (G2_SWREG(179))
#define G2_TILE_SAO_ADDR (G2_SWREG(181))
#define G2_TILE_BSD_ADDR (G2_SWREG(183))
+#define G2_DS_DST (G2_SWREG(186))
+#define G2_DS_DST_CHR (G2_SWREG(188))
#define g2_strm_buffer_len G2_DEC_REG(258, 0, 0xffffffff)
#define g2_strm_start_offset G2_DEC_REG(259, 0, 0xffffffff)
diff --git a/drivers/staging/media/hantro/hantro_hw.h b/drivers/staging/media/hantro/hantro_hw.h
index ed018e293ba0..09f17a3ceb95 100644
--- a/drivers/staging/media/hantro/hantro_hw.h
+++ b/drivers/staging/media/hantro/hantro_hw.h
@@ -245,12 +245,16 @@ struct hantro_postproc_ctx {
/**
* struct hantro_postproc_ops - post-processor operations
*
- * @enable: Enable the post-processor block. Optional.
- * @disable: Disable the post-processor block. Optional.
+ * @enable: Enable the post-processor block. Optional.
+ * @disable: Disable the post-processor block. Optional.
+ * @enum_framesizes: Enumerate possible scaled output formats.
+ * Returns zero if OK, a negative value in error cases.
+ * Optional.
*/
struct hantro_postproc_ops {
void (*enable)(struct hantro_ctx *ctx);
void (*disable)(struct hantro_ctx *ctx);
+ int (*enum_framesizes)(struct hantro_ctx *ctx, struct v4l2_frmsizeenum *fsize);
};
/**
diff --git a/drivers/staging/media/hantro/hantro_postproc.c b/drivers/staging/media/hantro/hantro_postproc.c
index 248abe5423f0..ab168c1c0d28 100644
--- a/drivers/staging/media/hantro/hantro_postproc.c
+++ b/drivers/staging/media/hantro/hantro_postproc.c
@@ -100,21 +100,58 @@ static void hantro_postproc_g1_enable(struct hantro_ctx *ctx)
HANTRO_PP_REG_WRITE(vpu, display_width, ctx->dst_fmt.width);
}
+static int down_scale_factor(struct hantro_ctx *ctx)
+{
+ if (ctx->src_fmt.width == ctx->dst_fmt.width)
+ return 0;
+
+ return DIV_ROUND_CLOSEST(ctx->src_fmt.width, ctx->dst_fmt.width);
+}
+
static void hantro_postproc_g2_enable(struct hantro_ctx *ctx)
{
struct hantro_dev *vpu = ctx->dev;
struct vb2_v4l2_buffer *dst_buf;
size_t chroma_offset = ctx->dst_fmt.width * ctx->dst_fmt.height;
+ int down_scale = down_scale_factor(ctx);
dma_addr_t dst_dma;
dst_buf = hantro_get_dst_buf(ctx);
dst_dma = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0);
- hantro_write_addr(vpu, G2_RS_OUT_LUMA_ADDR, dst_dma);
- hantro_write_addr(vpu, G2_RS_OUT_CHROMA_ADDR, dst_dma + chroma_offset);
+ if (down_scale) {
+ hantro_reg_write(vpu, &g2_down_scale_e, 1);
+ hantro_reg_write(vpu, &g2_down_scale_y, down_scale >> 2);
+ hantro_reg_write(vpu, &g2_down_scale_x, down_scale >> 2);
+ hantro_write_addr(vpu, G2_DS_DST, dst_dma);
+ hantro_write_addr(vpu, G2_DS_DST_CHR, dst_dma + (chroma_offset >> down_scale));
+ } else {
+ hantro_write_addr(vpu, G2_RS_OUT_LUMA_ADDR, dst_dma);
+ hantro_write_addr(vpu, G2_RS_OUT_CHROMA_ADDR, dst_dma + chroma_offset);
+ }
hantro_reg_write(vpu, &g2_out_rs_e, 1);
}
+static int hantro_postproc_g2_enum_framesizes(struct hantro_ctx *ctx,
+ struct v4l2_frmsizeenum *fsize)
+{
+ /**
+ * G2 scaler can scale down by 0, 2, 4 or 8
+ * use fsize->index has power of 2 diviser
+ **/
+ if (fsize->index > 3)
+ return -EINVAL;
+
+ if (!ctx->src_fmt.width || !ctx->src_fmt.height)
+ return -EINVAL;
+
+ fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
+ fsize->discrete.width = ctx->src_fmt.width >> fsize->index;
+ fsize->discrete.height = ctx->src_fmt.height >> fsize->index;
+
+ return 0;
+}
+
void hantro_postproc_free(struct hantro_ctx *ctx)
{
struct hantro_dev *vpu = ctx->dev;
@@ -197,6 +234,17 @@ void hantro_postproc_enable(struct hantro_ctx *ctx)
vpu->variant->postproc_ops->enable(ctx);
}
+int hanto_postproc_enum_framesizes(struct hantro_ctx *ctx,
+ struct v4l2_frmsizeenum *fsize)
+{
+ struct hantro_dev *vpu = ctx->dev;
+
+ if (vpu->variant->postproc_ops && vpu->variant->postproc_ops->enum_framesizes)
+ return vpu->variant->postproc_ops->enum_framesizes(ctx, fsize);
+
+ return -EINVAL;
+}
+
const struct hantro_postproc_ops hantro_g1_postproc_ops = {
.enable = hantro_postproc_g1_enable,
.disable = hantro_postproc_g1_disable,
@@ -205,4 +253,5 @@ const struct hantro_postproc_ops hantro_g1_postproc_ops = {
const struct hantro_postproc_ops hantro_g2_postproc_ops = {
.enable = hantro_postproc_g2_enable,
.disable = hantro_postproc_g2_disable,
+ .enum_framesizes = hantro_postproc_g2_enum_framesizes,
};
diff --git a/drivers/staging/media/hantro/hantro_v4l2.c b/drivers/staging/media/hantro/hantro_v4l2.c
index 67148ba346f5..8314a2efd4c8 100644
--- a/drivers/staging/media/hantro/hantro_v4l2.c
+++ b/drivers/staging/media/hantro/hantro_v4l2.c
@@ -116,12 +116,6 @@ static int vidioc_enum_framesizes(struct file *file, void *priv,
struct hantro_ctx *ctx = fh_to_ctx(priv);
const struct hantro_fmt *fmt;
- if (fsize->index != 0) {
- vpu_debug(0, "invalid frame size index (expected 0, got %d)\n",
- fsize->index);
- return -EINVAL;
- }
-
fmt = hantro_find_format(ctx, fsize->pixel_format);
if (!fmt) {
vpu_debug(0, "unsupported bitstream format (%08x)\n",
@@ -129,9 +123,14 @@ static int vidioc_enum_framesizes(struct file *file, void *priv,
return -EINVAL;
}
- /* This only makes sense for coded formats */
- if (fmt->codec_mode == HANTRO_MODE_NONE)
+ /* For non-coded formats check if postprocessing scaling is possible */
+ if (fmt->codec_mode == HANTRO_MODE_NONE && hantro_needs_postproc(ctx, fmt)) {
+ return hanto_postproc_enum_framesizes(ctx, fsize);
+ } else if (fsize->index != 0) {
+ vpu_debug(0, "invalid frame size index (expected 0, got %d)\n",
+ fsize->index);
return -EINVAL;
+ }
fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
fsize->stepwise = fmt->frmsize;
--
2.32.0
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