[PATCH v6 14/17] media: hantro: Stop using Hantro dedicated control

Benjamin Gaignard
2022-05-27T14:32:01Z

The number of bits to skip in the slice header can be computed
in the driver by using sps, pps and decode_params information.
This allow to remove Hantro dedicated control.

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
---
drivers/staging/media/hantro/hantro_drv.c | 36 -----------
.../staging/media/hantro/hantro_g2_hevc_dec.c | 62 ++++++++++++++++++-
include/media/hevc-ctrls.h | 13 ----
3 files changed, 61 insertions(+), 50 deletions(-)

diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
index b38d9b3ab2ed..377dcc1d19de 100644
--- a/drivers/staging/media/hantro/hantro_drv.c
+++ b/drivers/staging/media/hantro/hantro_drv.c
@@ -304,26 +304,6 @@ static int hantro_jpeg_s_ctrl(struct v4l2_ctrl *ctrl)
return 0;
}

-static int hantro_hevc_s_ctrl(struct v4l2_ctrl *ctrl)
-{
- struct hantro_ctx *ctx;
-
- ctx = container_of(ctrl->handler,
- struct hantro_ctx, ctrl_handler);
-
- vpu_debug(1, "s_ctrl: id = %d, val = %d\n", ctrl->id, ctrl->val);
-
- switch (ctrl->id) {
- case V4L2_CID_HANTRO_HEVC_SLICE_HEADER_SKIP:
- ctx->hevc_dec.ctrls.hevc_hdr_skip_length = ctrl->val;
- break;
- default:
- return -EINVAL;
- }
-
- return 0;
-}
-
static const struct v4l2_ctrl_ops hantro_ctrl_ops = {
.try_ctrl = hantro_try_ctrl,
};
@@ -332,10 +312,6 @@ static const struct v4l2_ctrl_ops hantro_jpeg_ctrl_ops = {
.s_ctrl = hantro_jpeg_s_ctrl,
};

-static const struct v4l2_ctrl_ops hantro_hevc_ctrl_ops = {
- .s_ctrl = hantro_hevc_s_ctrl,
-};
-
#define HANTRO_JPEG_ACTIVE_MARKERS (V4L2_JPEG_ACTIVE_MARKER_APP0 | \
V4L2_JPEG_ACTIVE_MARKER_COM | \
V4L2_JPEG_ACTIVE_MARKER_DQT | \
@@ -487,18 +463,6 @@ static const struct hantro_ctrl controls[] = {
.cfg = {
.id = V4L2_CID_STATELESS_HEVC_SCALING_MATRIX,
},
- }, {
- .codec = HANTRO_HEVC_DECODER,
- .cfg = {
- .id = V4L2_CID_HANTRO_HEVC_SLICE_HEADER_SKIP,
- .name = "Hantro HEVC slice header skip bytes",
- .type = V4L2_CTRL_TYPE_INTEGER,
- .min = 0,
- .def = 0,
- .max = 0x100,
- .step = 1,
- .ops = &hantro_hevc_ctrl_ops,
- },
}, {
.codec = HANTRO_VP9_DECODER,
.cfg = {
diff --git a/drivers/staging/media/hantro/hantro_g2_hevc_dec.c b/drivers/staging/media/hantro/hantro_g2_hevc_dec.c
index d28653d04d20..3be8d6e60bf0 100644
--- a/drivers/staging/media/hantro/hantro_g2_hevc_dec.c
+++ b/drivers/staging/media/hantro/hantro_g2_hevc_dec.c
@@ -117,6 +117,66 @@ static void prepare_tile_info_buffer(struct hantro_ctx *ctx)
vpu_debug(1, "%s: no chroma!\n", __func__);
}

+static unsigned int ceil_log2(unsigned int v)
+{
+ /* Compute Ceil(Log2(v))
+ * Derived from branchless code for integer log2(v) from:
+ * <http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog>
+ */
+ unsigned int r, shift;
+
+ v--;
+ r = (v > 0xFFFF) << 4;
+ v >>= r;
+ shift = (v > 0xFF) << 3;
+ v >>= shift;
+ r |= shift;
+ shift = (v > 0xF) << 2;
+ v >>= shift;
+ r |= shift;
+ shift = (v > 0x3) << 1;
+ v >>= shift;
+ r |= shift;
+ r |= (v >> 1);
+
+ return r + 1;
+}
+
+static int compute_header_skip_lenght(struct hantro_ctx *ctx)
+{
+ const struct hantro_hevc_dec_ctrls *ctrls = &ctx->hevc_dec.ctrls;
+ const struct v4l2_ctrl_hevc_decode_params *decode_params = ctrls->decode_params;
+ const struct v4l2_ctrl_hevc_sps *sps = ctrls->sps;
+ const struct v4l2_ctrl_hevc_pps *pps = ctrls->pps;
+ int skip = 0;
+
+ if (pps->flags & V4L2_HEVC_PPS_FLAG_OUTPUT_FLAG_PRESENT)
+ /* size of pic_output_flag */
+ skip++;
+
+ if (sps->flags & V4L2_HEVC_SPS_FLAG_SEPARATE_COLOUR_PLANE)
+ /* size of pic_order_cnt_lsb */
+ skip += 2;
+
+ if (!(decode_params->flags & V4L2_HEVC_DECODE_PARAM_FLAG_IDR_PIC)) {
+ /* size of pic_order_cnt_lsb */
+ skip += sps->log2_max_pic_order_cnt_lsb_minus4 + 4;
+
+ /* size of short_term_ref_pic_set_sps_flag */
+ skip++;
+
+ if (decode_params->short_term_ref_pic_set_size)
+ /* size of st_ref_pic_set( num_short_term_ref_pic_sets ) */
+ skip += decode_params->short_term_ref_pic_set_size;
+ else if (sps->num_short_term_ref_pic_sets > 1)
+ skip += ceil_log2(sps->num_short_term_ref_pic_sets);
+
+ skip += decode_params->long_term_ref_pic_set_size;
+ }
+
+ return skip;
+}
+
static void set_params(struct hantro_ctx *ctx)
{
const struct hantro_hevc_dec_ctrls *ctrls = &ctx->hevc_dec.ctrls;
@@ -134,7 +194,7 @@ static void set_params(struct hantro_ctx *ctx)

hantro_reg_write(vpu, &g2_output_8_bits, 0);

- hantro_reg_write(vpu, &g2_hdr_skip_length, ctrls->hevc_hdr_skip_length);
+ hantro_reg_write(vpu, &g2_hdr_skip_length, compute_header_skip_lenght(ctx));

min_log2_cb_size = sps->log2_min_luma_coding_block_size_minus3 + 3;
max_log2_ctb_size = min_log2_cb_size + sps->log2_diff_max_min_luma_coding_block_size;
diff --git a/include/media/hevc-ctrls.h b/include/media/hevc-ctrls.h
index d6cb3779d190..efc0412ac41e 100644
--- a/include/media/hevc-ctrls.h
+++ b/include/media/hevc-ctrls.h
@@ -467,17 +467,4 @@ struct v4l2_ctrl_hevc_scaling_matrix {
__u8 scaling_list_dc_coef_32x32[2];
};

-/* MPEG-class control IDs specific to the Hantro driver as defined by V4L2 */
-#define V4L2_CID_CODEC_HANTRO_BASE (V4L2_CTRL_CLASS_CODEC | 0x1200)
-/*
- * V4L2_CID_HANTRO_HEVC_SLICE_HEADER_SKIP -
- * the number of data (in bits) to skip in the
- * slice segment header.
- * If non-IDR, the bits to be skipped go from syntax element "pic_output_flag"
- * to before syntax element "slice_temporal_mvp_enabled_flag".
- * If IDR, the skipped bits are just "pic_output_flag"
- * (separate_colour_plane_flag is not supported).
- */
-#define V4L2_CID_HANTRO_HEVC_SLICE_HEADER_SKIP (V4L2_CID_CODEC_HANTRO_BASE + 0)
-
#endif
--
2.32.0