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Message-ID: <165cf812e228517c9e746691d887445dd1b732ba.camel@collabora.com>
Date: Tue, 16 Mar 2021 17:35:03 -0300
From: Ezequiel Garcia <ezequiel@...labora.com>
To: Benjamin Gaignard <benjamin.gaignard@...labora.com>,
p.zabel@...gutronix.de, mchehab@...nel.org, robh+dt@...nel.org,
shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
festevam@...il.com, linux-imx@....com, gregkh@...uxfoundation.org,
mripard@...nel.org, paul.kocialkowski@...tlin.com, wens@...e.org,
jernej.skrabec@...l.net, peng.fan@....com,
hverkuil-cisco@...all.nl, dan.carpenter@...cle.com
Cc: linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, kernel@...labora.com
Subject: Re: [PATCH v4 07/11] media: hantro: Introduce G2/HEVC decoder
On Tue, 2021-03-16 at 21:19 +0100, Benjamin Gaignard wrote:
>
> Le 16/03/2021 à 19:46, Ezequiel Garcia a écrit :
> > Hi Benjamin,
> >
> > The series is looking really good. Some comments below.
> >
> > On Wed, 2021-03-03 at 12:39 +0100, Benjamin Gaignard wrote:
> > > Implement all the logic to get G2 hardware decoding HEVC frames.
> > > It support up level 5.1 HEVC stream.
> > > It doesn't support yet 10 bits formats or scaling feature.
> > >
> > > Add HANTRO HEVC dedicated control to skip some bits at the beginning
> > > of the slice header. That is very specific to this hardware so can't
> > > go into uapi structures. Compute the needed value is complex and require
> > > information from the stream that only the userland knows so let it
> > > provide the correct value to the driver.
> > >
> > > Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> > > ---
> > > version 4:
> > > - fix Ezequiel comments
> > > - use dedicated control as an integer
> > > - change hantro_g2_hevc_dec_run prototype to return errors
> > >
> > > version 2:
> > > - squash multiple commits in this one.
> > > - fix the comments done by Ezequiel about dma_alloc_coherent usage
> > > - fix Dan's comments about control copy, reverse the test logic
> > > in tile_buffer_reallocate, rework some goto and return cases.
> > >
> > > drivers/staging/media/hantro/Makefile | 2 +
> > > drivers/staging/media/hantro/hantro.h | 18 +
> > > drivers/staging/media/hantro/hantro_drv.c | 53 ++
> > > .../staging/media/hantro/hantro_g2_hevc_dec.c | 587 ++++++++++++++++++
> > > drivers/staging/media/hantro/hantro_g2_regs.h | 198 ++++++
> > > drivers/staging/media/hantro/hantro_hevc.c | 321 ++++++++++
> > > drivers/staging/media/hantro/hantro_hw.h | 49 ++
> > > 7 files changed, 1228 insertions(+)
> > > create mode 100644 drivers/staging/media/hantro/hantro_g2_hevc_dec.c
> > > create mode 100644 drivers/staging/media/hantro/hantro_g2_regs.h
> > > create mode 100644 drivers/staging/media/hantro/hantro_hevc.c
> > >
> > > diff --git a/drivers/staging/media/hantro/Makefile b/drivers/staging/media/hantro/Makefile
> > > index 743ce08eb184..0357f1772267 100644
> > > --- a/drivers/staging/media/hantro/Makefile
> > > +++ b/drivers/staging/media/hantro/Makefile
> > > @@ -9,12 +9,14 @@ hantro-vpu-y += \
> > > hantro_h1_jpeg_enc.o \
> > > hantro_g1_h264_dec.o \
> > > hantro_g1_mpeg2_dec.o \
> > > + hantro_g2_hevc_dec.o \
> > > hantro_g1_vp8_dec.o \
> > > rk3399_vpu_hw_jpeg_enc.o \
> > > rk3399_vpu_hw_mpeg2_dec.o \
> > > rk3399_vpu_hw_vp8_dec.o \
> > > hantro_jpeg.o \
> > > hantro_h264.o \
> > > + hantro_hevc.o \
> > > hantro_mpeg2.o \
> > > hantro_vp8.o
> > >
> > > diff --git a/drivers/staging/media/hantro/hantro.h b/drivers/staging/media/hantro/hantro.h
> > > index 05876e426419..a9b80b2c9124 100644
> > > --- a/drivers/staging/media/hantro/hantro.h
> > > +++ b/drivers/staging/media/hantro/hantro.h
> > > @@ -225,6 +225,7 @@ struct hantro_dev {
> > > * @jpeg_enc: JPEG-encoding context.
> > > * @mpeg2_dec: MPEG-2-decoding context.
> > > * @vp8_dec: VP8-decoding context.
> > > + * @hevc_dec: HEVC-decoding context.
> > > */
> > > struct hantro_ctx {
> > > struct hantro_dev *dev;
> > > @@ -251,6 +252,7 @@ struct hantro_ctx {
> > > struct hantro_jpeg_enc_hw_ctx jpeg_enc;
> > > struct hantro_mpeg2_dec_hw_ctx mpeg2_dec;
> > > struct hantro_vp8_dec_hw_ctx vp8_dec;
> > > + struct hantro_hevc_dec_hw_ctx hevc_dec;
> > > };
> > > };
> > >
> > > @@ -428,6 +430,22 @@ hantro_get_dec_buf_addr(struct hantro_ctx *ctx, struct vb2_buffer *vb)
> > > return vb2_dma_contig_plane_dma_addr(vb, 0);
> > > }
> > >
> > > +static inline size_t
> > > +hantro_get_dec_buf_size(struct hantro_ctx *ctx, struct vb2_buffer *vb)
> > > +{
> > > + if (hantro_needs_postproc(ctx, ctx->vpu_dst_fmt))
> > > + return ctx->postproc.dec_q[vb->index].size;
> > > + return vb2_plane_size(vb, 0);
> > > +}
> > > +
> > > +static inline void *
> > > +hantro_get_dec_buf(struct hantro_ctx *ctx, struct vb2_buffer *vb)
> > > +{
> > > + if (hantro_needs_postproc(ctx, ctx->vpu_dst_fmt))
> > > + return ctx->postproc.dec_q[vb->index].cpu;
> > > + return vb2_plane_vaddr(vb, 0);
> > > +}
> > > +
> > Seems hantro_get_dec_buf_size and hantro_get_dec_buf are not used?
>
> You are right I will remove them
>
> >
> > > void hantro_postproc_disable(struct hantro_ctx *ctx);
> > > void hantro_postproc_enable(struct hantro_ctx *ctx);
> > > void hantro_postproc_free(struct hantro_ctx *ctx);
> > > diff --git a/drivers/staging/media/hantro/hantro_drv.c b/drivers/staging/media/hantro/hantro_drv.c
> > > index e3e6df28f470..bc90a52f4d3d 100644
> > > --- a/drivers/staging/media/hantro/hantro_drv.c
> > > +++ b/drivers/staging/media/hantro/hantro_drv.c
> > > @@ -30,6 +30,13 @@
> > >
> > > #define DRIVER_NAME "hantro-vpu"
> > >
> > > +/*
> > > + * V4L2_CID_HANTRO_HEVC_SLICE_HEADER_SKIP -
> > > + * the number of data (in bits) to skip in the
> > > + * slice segment header syntax after 'slice type' token
> > > + */
> > I think we need to document this better, so applications can
> > correctly use the control. From i.MX reference code, it seems
> > this needs to be used as follows:
> >
> > 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).
> >
> > And it seems this needs to be passed parsing only the first slice,
> > given this syntax remains invariant across all the slices.
>
> Ok I will add your description in the next version.
>
> >
> > > +#define V4L2_CID_HANTRO_HEVC_SLICE_HEADER_SKIP (V4L2_CID_USER_HANTRO_BASE + 0)
> > > +
> > > int hantro_debug;
> > > module_param_named(debug, hantro_debug, int, 0644);
> > > MODULE_PARM_DESC(debug,
> > > @@ -281,6 +288,26 @@ 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,
> > > };
> > > @@ -289,6 +316,10 @@ 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,
> > > +};
> > > +
> > > static const struct hantro_ctrl controls[] = {
> > > {
> > > .codec = HANTRO_JPEG_ENCODER,
> > > @@ -409,6 +440,28 @@ static const struct hantro_ctrl controls[] = {
> > > .cfg = {
> > > .id = V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS,
> > > },
> > > + }, {
> > > + .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 = 0x7fffffff,
> > > + .step = 1,
> > > + .ops = &hantro_hevc_ctrl_ops,
> > > + },
> > > + }, {
> > > + .codec = HANTRO_JPEG_ENCODER | HANTRO_MPEG2_DECODER |
> > > + HANTRO_VP8_DECODER | HANTRO_H264_DECODER |
> > > + HANTRO_HEVC_DECODER,
> > > + .cfg = {
> > > + .id = V4L2_CID_USER_CLASS,
> > This shouldn't be here, is this V4L2_CID_USER_CLASS required by v4l2-compliance
> > or by the spec?
>
> It is required by v4l2-compliance.
>
Unless Hans says otherwise, I'd say drop this V4L2_CID_USER_CLASS control,
and we can figure out what's wrong with v4l2-compliance later.
> >
> > > + .name = "HANTRO controls",
> > > + .type = V4L2_CTRL_TYPE_CTRL_CLASS,
> > > + .flags = V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY,
> > > + },
> > > },
> > > };
> > >
> > > diff --git a/drivers/staging/media/hantro/hantro_g2_hevc_dec.c b/drivers/staging/media/hantro/hantro_g2_hevc_dec.c
> > > new file mode 100644
> > > index 000000000000..5d75b36bc40c
> > > --- /dev/null
> > > +++ b/drivers/staging/media/hantro/hantro_g2_hevc_dec.c
> > > @@ -0,0 +1,587 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +/*
> > > + * Hantro VPU HEVC codec driver
> > > + *
> > > + * Copyright (C) 2020 Safran Passenger Innovations LLC
> > > + */
> > > +
> > > +#include "hantro_hw.h"
> > > +#include "hantro_g2_regs.h"
> > > +
> > > +#define HEVC_DEC_MODE 0xC
> > > +
> > > +#define BUS_WIDTH_32 0
> > > +#define BUS_WIDTH_64 1
> > > +#define BUS_WIDTH_128 2
> > > +#define BUS_WIDTH_256 3
> > > +
> > > +static inline void hantro_write_addr(struct hantro_dev *vpu,
> > > + unsigned long offset,
> > > + dma_addr_t addr)
> > > +{
> > > + vdpu_write(vpu, addr & 0xffffffff, offset);
> > > +}
> > > +
> > > +static void prepare_tile_info_buffer(struct hantro_ctx *ctx)
> > > +{
> > > + struct hantro_dev *vpu = ctx->dev;
> > > + const struct hantro_hevc_dec_ctrls *ctrls = &ctx->hevc_dec.ctrls;
> > > + const struct v4l2_ctrl_hevc_pps *pps = ctrls->pps;
> > > + const struct v4l2_ctrl_hevc_sps *sps = ctrls->sps;
> > > + u16 *p = (u16 *)((u8 *)ctx->hevc_dec.tile_sizes.cpu);
> > > + unsigned int num_tile_rows = pps->num_tile_rows_minus1 + 1;
> > > + unsigned int num_tile_cols = pps->num_tile_columns_minus1 + 1;
> > > + unsigned int pic_width_in_ctbs, pic_height_in_ctbs;
> > > + unsigned int max_log2_ctb_size, ctb_size;
> > > + bool tiles_enabled, uniform_spacing;
> > > + u32 no_chroma = 0;
> > > +
> > > + tiles_enabled = !!(pps->flags & V4L2_HEVC_PPS_FLAG_TILES_ENABLED);
> > > + uniform_spacing = !!(pps->flags & V4L2_HEVC_PPS_FLAG_UNIFORM_SPACING);
> > > +
> > > + hantro_reg_write(vpu, hevc_tile_e, tiles_enabled);
> > > +
> > > + max_log2_ctb_size = sps->log2_min_luma_coding_block_size_minus3 + 3 +
> > > + sps->log2_diff_max_min_luma_coding_block_size;
> > > + pic_width_in_ctbs = (sps->pic_width_in_luma_samples +
> > > + (1 << max_log2_ctb_size) - 1) >> max_log2_ctb_size;
> > > + pic_height_in_ctbs = (sps->pic_height_in_luma_samples + (1 << max_log2_ctb_size) - 1)
> > > + >> max_log2_ctb_size;
> > > + ctb_size = 1 << max_log2_ctb_size;
> > > +
> > > + vpu_debug(1, "Preparing tile sizes buffer for %dx%d CTBs (CTB size %d)\n",
> > > + pic_width_in_ctbs, pic_height_in_ctbs, ctb_size);
> > > +
> > > + if (tiles_enabled) {
> > > + unsigned int i, j, h;
> > > +
> > > + vpu_debug(1, "Tiles enabled! %dx%d\n", num_tile_cols, num_tile_rows);
> > > +
> > > + hantro_reg_write(vpu, hevc_num_tile_rows, num_tile_rows);
> > > + hantro_reg_write(vpu, hevc_num_tile_cols, num_tile_cols);
> > > +
> > > + /* write width + height for each tile in pic */
> > > + if (!uniform_spacing) {
> > > + u32 tmp_w = 0, tmp_h = 0;
> > > +
> > > + for (i = 0; i < num_tile_rows; i++) {
> > > + if (i == num_tile_rows - 1)
> > > + h = pic_height_in_ctbs - tmp_h;
> > > + else
> > > + h = pps->row_height_minus1[i] + 1;
> > > + tmp_h += h;
> > > + if (i == 0 && h == 1 && ctb_size == 16)
> > > + no_chroma = 1;
> > > + for (j = 0, tmp_w = 0; j < num_tile_cols - 1; j++) {
> > > + tmp_w += pps->column_width_minus1[j] + 1;
> > > + *p++ = pps->column_width_minus1[j + 1];
> > > + *p++ = h;
> > > + if (i == 0 && h == 1 && ctb_size == 16)
> > > + no_chroma = 1;
> > > + }
> > > + /* last column */
> > > + *p++ = pic_width_in_ctbs - tmp_w;
> > > + *p++ = h;
> > > + }
> > > + } else { /* uniform spacing */
> > > + u32 tmp, prev_h, prev_w;
> > > +
> > > + for (i = 0, prev_h = 0; i < num_tile_rows; i++) {
> > > + tmp = (i + 1) * pic_height_in_ctbs / num_tile_rows;
> > > + h = tmp - prev_h;
> > > + prev_h = tmp;
> > > + if (i == 0 && h == 1 && ctb_size == 16)
> > > + no_chroma = 1;
> > > + for (j = 0, prev_w = 0; j < num_tile_cols; j++) {
> > > + tmp = (j + 1) * pic_width_in_ctbs / num_tile_cols;
> > > + *p++ = tmp - prev_w;
> > > + *p++ = h;
> > > + if (j == 0 &&
> > > + (pps->column_width_minus1[0] + 1) == 1 &&
> > > + ctb_size == 16)
> > > + no_chroma = 1;
> > > + prev_w = tmp;
> > > + }
> > > + }
> > > + }
> > > + } else {
> > > + hantro_reg_write(vpu, hevc_num_tile_rows, 1);
> > > + hantro_reg_write(vpu, hevc_num_tile_cols, 1);
> > > +
> > > + /* There's one tile, with dimensions equal to pic size. */
> > > + p[0] = pic_width_in_ctbs;
> > > + p[1] = pic_height_in_ctbs;
> > > + }
> > > +
> > > + if (no_chroma)
> > > + vpu_debug(1, "%s: no chroma!\n", __func__);
> > > +}
> > > +
> > > +static void set_params(struct hantro_ctx *ctx)
> > > +{
> > > + const struct hantro_hevc_dec_ctrls *ctrls = &ctx->hevc_dec.ctrls;
> > > + const struct v4l2_ctrl_hevc_sps *sps = ctrls->sps;
> > > + const struct v4l2_ctrl_hevc_pps *pps = ctrls->pps;
> > > + const struct v4l2_ctrl_hevc_decode_params *decode_params = ctrls->decode_params;
> > > + struct hantro_dev *vpu = ctx->dev;
> > > + u32 min_log2_cb_size, max_log2_ctb_size, min_cb_size, max_ctb_size;
> > > + u32 pic_width_in_min_cbs, pic_height_in_min_cbs;
> > > + u32 pic_width_aligned, pic_height_aligned;
> > > + u32 partial_ctb_x, partial_ctb_y;
> > > +
> > > + hantro_reg_write(vpu, hevc_bit_depth_y_minus8, sps->bit_depth_luma_minus8);
> > > + hantro_reg_write(vpu, hevc_bit_depth_c_minus8, sps->bit_depth_chroma_minus8);
> > > +
> > > + hantro_reg_write(vpu, hevc_output_8_bits, 0);
> > > +
> > > + hantro_reg_write(vpu, hevc_hdr_skip_length, ctrls->hevc_hdr_skip_length);
> > > +
> > > + 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;
> > > +
> > > + hantro_reg_write(vpu, hevc_min_cb_size, min_log2_cb_size);
> > > + hantro_reg_write(vpu, hevc_max_cb_size, max_log2_ctb_size);
> > > +
> > > + min_cb_size = 1 << min_log2_cb_size;
> > > + max_ctb_size = 1 << max_log2_ctb_size;
> > > +
> > > + pic_width_in_min_cbs = sps->pic_width_in_luma_samples / min_cb_size;
> > > + pic_height_in_min_cbs = sps->pic_height_in_luma_samples / min_cb_size;
> > > + pic_width_aligned = ALIGN(sps->pic_width_in_luma_samples, max_ctb_size);
> > > + pic_height_aligned = ALIGN(sps->pic_height_in_luma_samples, max_ctb_size);
> > > +
> > > + partial_ctb_x = !!(sps->pic_width_in_luma_samples != pic_width_aligned);
> > > + partial_ctb_y = !!(sps->pic_height_in_luma_samples != pic_height_aligned);
> > > +
> > > + hantro_reg_write(vpu, hevc_partial_ctb_x, partial_ctb_x);
> > > + hantro_reg_write(vpu, hevc_partial_ctb_y, partial_ctb_y);
> > > +
> > > + hantro_reg_write(vpu, hevc_pic_width_in_cbs, pic_width_in_min_cbs);
> > > + hantro_reg_write(vpu, hevc_pic_height_in_cbs, pic_height_in_min_cbs);
> > > +
> > > + hantro_reg_write(vpu, hevc_pic_width_4x4,
> > > + (pic_width_in_min_cbs * min_cb_size) / 4);
> > > + hantro_reg_write(vpu, hevc_pic_height_4x4,
> > > + (pic_height_in_min_cbs * min_cb_size) / 4);
> > > +
> > > + hantro_reg_write(vpu, hevc_max_inter_hierdepth,
> > > + sps->max_transform_hierarchy_depth_inter);
> > > + hantro_reg_write(vpu, hevc_max_intra_hierdepth,
> > > + sps->max_transform_hierarchy_depth_intra);
> > > + hantro_reg_write(vpu, hevc_min_trb_size,
> > > + sps->log2_min_luma_transform_block_size_minus2 + 2);
> > > + hantro_reg_write(vpu, hevc_max_trb_size,
> > > + sps->log2_min_luma_transform_block_size_minus2 + 2 +
> > > + sps->log2_diff_max_min_luma_transform_block_size);
> > > +
> > > + hantro_reg_write(vpu, hevc_tempor_mvp_e,
> > > + !!(sps->flags & V4L2_HEVC_SPS_FLAG_SPS_TEMPORAL_MVP_ENABLED) &&
> > > + !(decode_params->flags & V4L2_HEVC_DECODE_PARAM_FLAG_IDR_PIC));
> > > + hantro_reg_write(vpu, hevc_strong_smooth_e,
> > > + !!(sps->flags & V4L2_HEVC_SPS_FLAG_STRONG_INTRA_SMOOTHING_ENABLED));
> > > + hantro_reg_write(vpu, hevc_asym_pred_e,
> > > + !!(sps->flags & V4L2_HEVC_SPS_FLAG_AMP_ENABLED));
> > > + hantro_reg_write(vpu, hevc_sao_e,
> > > + !!(sps->flags & V4L2_HEVC_SPS_FLAG_SAMPLE_ADAPTIVE_OFFSET));
> > > + hantro_reg_write(vpu, hevc_sign_data_hide,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_SIGN_DATA_HIDING_ENABLED));
> > > +
> > > + if (pps->flags & V4L2_HEVC_PPS_FLAG_CU_QP_DELTA_ENABLED) {
> > > + hantro_reg_write(vpu, hevc_cu_qpd_e, 1);
> > > + hantro_reg_write(vpu, hevc_max_cu_qpd_depth, pps->diff_cu_qp_delta_depth);
> > > + } else {
> > > + hantro_reg_write(vpu, hevc_cu_qpd_e, 0);
> > > + hantro_reg_write(vpu, hevc_max_cu_qpd_depth, 0);
> > > + }
> > > +
> > > + if (pps->flags & V4L2_HEVC_PPS_FLAG_PPS_SLICE_CHROMA_QP_OFFSETS_PRESENT) {
> > > + hantro_reg_write(vpu, hevc_cb_qp_offset, pps->pps_cb_qp_offset);
> > > + hantro_reg_write(vpu, hevc_cr_qp_offset, pps->pps_cr_qp_offset);
> > > + } else {
> > > + hantro_reg_write(vpu, hevc_cb_qp_offset, 0);
> > > + hantro_reg_write(vpu, hevc_cr_qp_offset, 0);
> > > + }
> > > +
> > > + hantro_reg_write(vpu, hevc_filt_offset_beta, pps->pps_beta_offset_div2);
> > > + hantro_reg_write(vpu, hevc_filt_offset_tc, pps->pps_tc_offset_div2);
> > > + hantro_reg_write(vpu, hevc_slice_hdr_ext_e,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_SLICE_SEGMENT_HEADER_EXTENSION_PRESENT));
> > > + hantro_reg_write(vpu, hevc_slice_hdr_ext_bits, pps->num_extra_slice_header_bits);
> > > + hantro_reg_write(vpu, hevc_slice_chqp_present,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_PPS_SLICE_CHROMA_QP_OFFSETS_PRESENT));
> > > + hantro_reg_write(vpu, hevc_weight_bipr_idc,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_WEIGHTED_BIPRED));
> > > + hantro_reg_write(vpu, hevc_transq_bypass,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_TRANSQUANT_BYPASS_ENABLED));
> > > + hantro_reg_write(vpu, hevc_list_mod_e,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_LISTS_MODIFICATION_PRESENT));
> > > + hantro_reg_write(vpu, hevc_entropy_sync_e,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_ENTROPY_CODING_SYNC_ENABLED));
> > > + hantro_reg_write(vpu, hevc_cabac_init_present,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_CABAC_INIT_PRESENT));
> > > + hantro_reg_write(vpu, hevc_idr_pic_e,
> > > + !!(decode_params->flags & V4L2_HEVC_DECODE_PARAM_FLAG_IRAP_PIC));
> > > + hantro_reg_write(vpu, hevc_parallel_merge,
> > > + pps->log2_parallel_merge_level_minus2 + 2);
> > > + hantro_reg_write(vpu, hevc_pcm_filt_d,
> > > + !!(sps->flags & V4L2_HEVC_SPS_FLAG_PCM_LOOP_FILTER_DISABLED));
> > > + hantro_reg_write(vpu, hevc_pcm_e,
> > > + !!(sps->flags & V4L2_HEVC_SPS_FLAG_PCM_ENABLED));
> > > + if (sps->flags & V4L2_HEVC_SPS_FLAG_PCM_ENABLED) {
> > > + hantro_reg_write(vpu, hevc_max_pcm_size,
> > > + sps->log2_diff_max_min_pcm_luma_coding_block_size +
> > > + sps->log2_min_pcm_luma_coding_block_size_minus3 + 3);
> > > + hantro_reg_write(vpu, hevc_min_pcm_size,
> > > + sps->log2_min_pcm_luma_coding_block_size_minus3 + 3);
> > > + hantro_reg_write(vpu, hevc_bit_depth_pcm_y,
> > > + sps->pcm_sample_bit_depth_luma_minus1 + 1);
> > > + hantro_reg_write(vpu, hevc_bit_depth_pcm_c,
> > > + sps->pcm_sample_bit_depth_chroma_minus1 + 1);
> > > + } else {
> > > + hantro_reg_write(vpu, hevc_max_pcm_size, 0);
> > > + hantro_reg_write(vpu, hevc_min_pcm_size, 0);
> > > + hantro_reg_write(vpu, hevc_bit_depth_pcm_y, 0);
> > > + hantro_reg_write(vpu, hevc_bit_depth_pcm_c, 0);
> > > + }
> > > +
> > > + hantro_reg_write(vpu, hevc_start_code_e, 1);
> > > + hantro_reg_write(vpu, hevc_init_qp, pps->init_qp_minus26 + 26);
> > > + hantro_reg_write(vpu, hevc_weight_pred_e,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_WEIGHTED_PRED));
> > > + hantro_reg_write(vpu, hevc_cabac_init_present,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_CABAC_INIT_PRESENT));
> > > + hantro_reg_write(vpu, hevc_const_intra_e,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_CONSTRAINED_INTRA_PRED));
> > > + hantro_reg_write(vpu, hevc_transform_skip,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_TRANSFORM_SKIP_ENABLED));
> > > + hantro_reg_write(vpu, hevc_out_filtering_dis,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_PPS_DISABLE_DEBLOCKING_FILTER));
> > > + hantro_reg_write(vpu, hevc_filt_ctrl_pres,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_CONTROL_PRESENT));
> > > + hantro_reg_write(vpu, hevc_dependent_slice,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_DEPENDENT_SLICE_SEGMENT));
> > > + hantro_reg_write(vpu, hevc_filter_override,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_DEBLOCKING_FILTER_OVERRIDE_ENABLED));
> > > + hantro_reg_write(vpu, hevc_refidx0_active,
> > > + pps->num_ref_idx_l0_default_active_minus1 + 1);
> > > + hantro_reg_write(vpu, hevc_refidx1_active,
> > > + pps->num_ref_idx_l1_default_active_minus1 + 1);
> > > + hantro_reg_write(vpu, hevc_apf_threshold, 8);
> > > +}
> > > +
> > > +static int find_ref_pic_index(const struct v4l2_hevc_dpb_entry *dpb, int pic_order_cnt)
> > > +{
> > > + int i;
> > > +
> > > + for (i = 0; i < V4L2_HEVC_DPB_ENTRIES_NUM_MAX; i++) {
> > > + if (dpb[i].pic_order_cnt[0] == pic_order_cnt)
> > > + return i;
> > > + }
> > > +
> > > + return 0x0;
> > > +}
> > > +
> > > +static void set_ref_pic_list(struct hantro_ctx *ctx)
> > > +{
> > > + const struct hantro_hevc_dec_ctrls *ctrls = &ctx->hevc_dec.ctrls;
> > > + struct hantro_dev *vpu = ctx->dev;
> > > + const struct v4l2_ctrl_hevc_decode_params *decode_params = ctrls->decode_params;
> > > + const struct v4l2_hevc_dpb_entry *dpb = decode_params->dpb;
> > > + u32 list0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX] = {0};
> > > + u32 list1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX] = {0};
> > > + const struct hantro_reg *ref_pic_regs0[] = {
> > > + hevc_rlist_f0,
> > > + hevc_rlist_f1,
> > > + hevc_rlist_f2,
> > > + hevc_rlist_f3,
> > > + hevc_rlist_f4,
> > > + hevc_rlist_f5,
> > > + hevc_rlist_f6,
> > > + hevc_rlist_f7,
> > > + hevc_rlist_f8,
> > > + hevc_rlist_f9,
> > > + hevc_rlist_f10,
> > > + hevc_rlist_f11,
> > > + hevc_rlist_f12,
> > > + hevc_rlist_f13,
> > > + hevc_rlist_f14,
> > > + hevc_rlist_f15,
> > > + };
> > > + const struct hantro_reg *ref_pic_regs1[] = {
> > > + hevc_rlist_b0,
> > > + hevc_rlist_b1,
> > > + hevc_rlist_b2,
> > > + hevc_rlist_b3,
> > > + hevc_rlist_b4,
> > > + hevc_rlist_b5,
> > > + hevc_rlist_b6,
> > > + hevc_rlist_b7,
> > > + hevc_rlist_b8,
> > > + hevc_rlist_b9,
> > > + hevc_rlist_b10,
> > > + hevc_rlist_b11,
> > > + hevc_rlist_b12,
> > > + hevc_rlist_b13,
> > > + hevc_rlist_b14,
> > > + hevc_rlist_b15,
> > > + };
> > > + unsigned int i, j;
> > > +
> > > + /* List 0 contains: short term before, short term after and long term */
> > > + j = 0;
> > > + for (i = 0; i < decode_params->num_poc_st_curr_before && j < ARRAY_SIZE(list0); i++)
> > > + list0[j++] = find_ref_pic_index(dpb, decode_params->poc_st_curr_before[i]);
> > > + for (i = 0; i < decode_params->num_poc_st_curr_after && j < ARRAY_SIZE(list0); i++)
> > > + list0[j++] = find_ref_pic_index(dpb, decode_params->poc_st_curr_after[i]);
> > > + for (i = 0; i < decode_params->num_poc_lt_curr && j < ARRAY_SIZE(list0); i++)
> > > + list0[j++] = find_ref_pic_index(dpb, decode_params->poc_lt_curr[i]);
> > > +
> > > + /* Fill the list, copying over and over */
> > > + i = 0;
> > > + while (j < ARRAY_SIZE(list0))
> > > + list0[j++] = list0[i++];
> > > +
> > > + j = 0;
> > > + for (i = 0; i < decode_params->num_poc_st_curr_after && j < ARRAY_SIZE(list1); i++)
> > > + list1[j++] = find_ref_pic_index(dpb, decode_params->poc_st_curr_after[i]);
> > > + for (i = 0; i < decode_params->num_poc_st_curr_before && j < ARRAY_SIZE(list1); i++)
> > > + list1[j++] = find_ref_pic_index(dpb, decode_params->poc_st_curr_before[i]);
> > > + for (i = 0; i < decode_params->num_poc_lt_curr && j < ARRAY_SIZE(list1); i++)
> > > + list1[j++] = find_ref_pic_index(dpb, decode_params->poc_lt_curr[i]);
> > > +
> > > + i = 0;
> > > + while (j < ARRAY_SIZE(list1))
> > > + list1[j++] = list1[i++];
> > > +
> > > + for (i = 0; i < V4L2_HEVC_DPB_ENTRIES_NUM_MAX; i++) {
> > > + hantro_reg_write(vpu, ref_pic_regs0[i], list0[i]);
> > > + hantro_reg_write(vpu, ref_pic_regs1[i], list1[i]);
> > > + }
> > > +}
> > > +
> > > +static int set_ref(struct hantro_ctx *ctx)
> > > +{
> > > + const struct hantro_hevc_dec_ctrls *ctrls = &ctx->hevc_dec.ctrls;
> > > + const struct v4l2_ctrl_hevc_sps *sps = ctrls->sps;
> > > + const struct v4l2_ctrl_hevc_pps *pps = ctrls->pps;
> > > + const struct v4l2_ctrl_hevc_decode_params *decode_params = ctrls->decode_params;
> > > + const struct v4l2_hevc_dpb_entry *dpb = decode_params->dpb;
> > > + dma_addr_t luma_addr, chroma_addr, mv_addr = 0;
> > > + struct hantro_dev *vpu = ctx->dev;
> > > + size_t cr_offset = hantro_hevc_chroma_offset(sps);
> > > + size_t mv_offset = hantro_hevc_motion_vectors_offset(sps);
> > > + u32 max_ref_frames;
> > > + u16 dpb_longterm_e;
> > > +
> > > + const struct hantro_reg *cur_poc[] = {
> > > + hevc_cur_poc_00,
> > > + hevc_cur_poc_01,
> > > + hevc_cur_poc_02,
> > > + hevc_cur_poc_03,
> > > + hevc_cur_poc_04,
> > > + hevc_cur_poc_05,
> > > + hevc_cur_poc_06,
> > > + hevc_cur_poc_07,
> > > + hevc_cur_poc_08,
> > > + hevc_cur_poc_09,
> > > + hevc_cur_poc_10,
> > > + hevc_cur_poc_11,
> > > + hevc_cur_poc_12,
> > > + hevc_cur_poc_13,
> > > + hevc_cur_poc_14,
> > > + hevc_cur_poc_15,
> > > + };
> > > + unsigned int i;
> > > +
> > > + max_ref_frames = decode_params->num_poc_lt_curr +
> > > + decode_params->num_poc_st_curr_before +
> > > + decode_params->num_poc_st_curr_after;
> > > + /*
> > > + * Set max_ref_frames to non-zero to avoid HW hang when decoding
> > > + * badly marked I-frames.
> > > + */
> > > + max_ref_frames = max_ref_frames ? max_ref_frames : 1;
> > > + hantro_reg_write(vpu, hevc_num_ref_frames, max_ref_frames);
> > > + hantro_reg_write(vpu, hevc_filter_over_slices,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_PPS_LOOP_FILTER_ACROSS_SLICES_ENABLED));
> > > + hantro_reg_write(vpu, hevc_filter_over_tiles,
> > > + !!(pps->flags & V4L2_HEVC_PPS_FLAG_LOOP_FILTER_ACROSS_TILES_ENABLED));
> > > +
> > > + /*
> > > + * Write POC count diff from current pic. For frame decoding only compute
> > > + * pic_order_cnt[0] and ignore pic_order_cnt[1] used in field-coding.
> > > + */
> > > + for (i = 0; i < decode_params->num_active_dpb_entries && i < ARRAY_SIZE(cur_poc); i++) {
> > > + char poc_diff = decode_params->pic_order_cnt_val - dpb[i].pic_order_cnt[0];
> > > +
> > > + hantro_reg_write(vpu, cur_poc[i], poc_diff);
> > > + }
> > > +
> > > + if (i < ARRAY_SIZE(cur_poc)) {
> > > + /*
> > > + * After the references, fill one entry pointing to itself,
> > > + * i.e. difference is zero.
> > > + */
> > > + hantro_reg_write(vpu, cur_poc[i], 0);
> > > + i++;
> > > + }
> > > +
> > > + /* Fill the rest with the current picture */
> > > + for (; i < ARRAY_SIZE(cur_poc); i++)
> > > + hantro_reg_write(vpu, cur_poc[i], decode_params->pic_order_cnt_val);
> > > +
> > > + set_ref_pic_list(ctx);
> > > +
> > > + /* We will only keep the references picture that are still used */
> > > + ctx->hevc_dec.ref_bufs_used = 0;
> > > +
> > > + /* Set up addresses of DPB buffers */
> > > + dpb_longterm_e = 0;
> > > + for (i = 0; i < decode_params->num_active_dpb_entries &&
> > > + i < (V4L2_HEVC_DPB_ENTRIES_NUM_MAX - 1); i++) {
> > > + luma_addr = hantro_hevc_get_ref_buf(ctx, dpb[i].pic_order_cnt[0]);
> > > + if (!luma_addr)
> > > + return -ENOMEM;
> > > +
> > > + chroma_addr = luma_addr + cr_offset;
> > > + mv_addr = luma_addr + mv_offset;
> > > +
> > > + if (dpb[i].rps == V4L2_HEVC_DPB_ENTRY_RPS_LT_CURR)
> > > + dpb_longterm_e |= BIT(V4L2_HEVC_DPB_ENTRIES_NUM_MAX - 1 - i);
> > > +
> > > + hantro_write_addr(vpu, HEVC_REG_ADDR_REF(i), luma_addr);
> > > + hantro_write_addr(vpu, HEVC_REG_CHR_REF(i), chroma_addr);
> > > + hantro_write_addr(vpu, HEVC_REG_DMV_REF(i), mv_addr);
> > > + }
> > > +
> > > + luma_addr = hantro_hevc_get_ref_buf(ctx, decode_params->pic_order_cnt_val);
> > > + if (!luma_addr)
> > > + return -ENOMEM;
> > > +
> > > + chroma_addr = luma_addr + cr_offset;
> > > + mv_addr = luma_addr + mv_offset;
> > > +
> > > + hantro_write_addr(vpu, HEVC_REG_ADDR_REF(i), luma_addr);
> > > + hantro_write_addr(vpu, HEVC_REG_CHR_REF(i), chroma_addr);
> > > + hantro_write_addr(vpu, HEVC_REG_DMV_REF(i++), mv_addr);
> > > +
> > > + hantro_write_addr(vpu, HEVC_ADDR_DST, luma_addr);
> > > + hantro_write_addr(vpu, HEVC_ADDR_DST_CHR, chroma_addr);
> > > + hantro_write_addr(vpu, HEVC_ADDR_DST_MV, mv_addr);
> > > +
> > > + hantro_hevc_ref_remove_unused(ctx);
> > > +
> > > + for (; i < V4L2_HEVC_DPB_ENTRIES_NUM_MAX; i++) {
> > > + hantro_write_addr(vpu, HEVC_REG_ADDR_REF(i), 0);
> > > + hantro_write_addr(vpu, HEVC_REG_CHR_REF(i), 0);
> > > + hantro_write_addr(vpu, HEVC_REG_DMV_REF(i), 0);
> > > + }
> > > +
> > > + hantro_reg_write(vpu, hevc_refer_lterm_e, dpb_longterm_e);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static void set_buffers(struct hantro_ctx *ctx)
> > > +{
> > > + struct vb2_v4l2_buffer *src_buf, *dst_buf;
> > > + struct hantro_dev *vpu = ctx->dev;
> > > + const struct hantro_hevc_dec_ctrls *ctrls = &ctx->hevc_dec.ctrls;
> > > + const struct v4l2_ctrl_hevc_sps *sps = ctrls->sps;
> > > + size_t cr_offset = hantro_hevc_chroma_offset(sps);
> > > + dma_addr_t src_dma, dst_dma;
> > > + u32 src_len, src_buf_len;
> > > +
> > > + src_buf = hantro_get_src_buf(ctx);
> > > + dst_buf = hantro_get_dst_buf(ctx);
> > > +
> > > + /* Source (stream) buffer. */
> > > + src_dma = vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
> > > + src_len = vb2_get_plane_payload(&src_buf->vb2_buf, 0);
> > > + src_buf_len = vb2_plane_size(&src_buf->vb2_buf, 0);
> > > +
> > > + hantro_write_addr(vpu, HEVC_ADDR_STR, src_dma);
> > > + hantro_reg_write(vpu, hevc_stream_len, src_len);
> > > + hantro_reg_write(vpu, hevc_strm_buffer_len, src_buf_len);
> > > + hantro_reg_write(vpu, hevc_strm_start_offset, 0);
> > > + hantro_reg_write(vpu, hevc_write_mvs_e, 1);
> > > +
> > > + /* Destination (decoded frame) buffer. */
> > > + dst_dma = hantro_get_dec_buf_addr(ctx, &dst_buf->vb2_buf);
> > > +
> > > + hantro_write_addr(vpu, HEVC_RASTER_SCAN, dst_dma);
> > > + hantro_write_addr(vpu, HEVC_RASTER_SCAN_CHR, dst_dma + cr_offset);
> > > + hantro_write_addr(vpu, HEVC_ADDR_TILE_SIZE, ctx->hevc_dec.tile_sizes.dma);
> > > + hantro_write_addr(vpu, HEVC_TILE_FILTER, ctx->hevc_dec.tile_filter.dma);
> > > + hantro_write_addr(vpu, HEVC_TILE_SAO, ctx->hevc_dec.tile_sao.dma);
> > > + hantro_write_addr(vpu, HEVC_TILE_BSD, ctx->hevc_dec.tile_bsd.dma);
> > > +}
> > > +
> > > +void hantro_g2_check_idle(struct hantro_dev *vpu)
> > > +{
> > > + int i;
> > > +
> > > + for (i = 0; i < 3; i++) {
> > > + u32 status;
> > > +
> > > + /* Make sure the VPU is idle */
> > > + status = vdpu_read(vpu, HEVC_REG_INTERRUPT);
> > > + if (status & HEVC_REG_INTERRUPT_DEC_E) {
> > > + pr_warn("%s: still enabled!!! resetting.\n", __func__);
> > How about we clean this pr_warn: use either v4l2_warn or dev_warn and make
> > the warning "device still running, aborting" (I personally dislike the abort
> > metaphor, but guess it's OK here).
>
> Ok
>
> >
> > > + status |= HEVC_REG_INTERRUPT_DEC_ABORT_E | HEVC_REG_INTERRUPT_DEC_IRQ_DIS;
> > > + vdpu_write(vpu, status, HEVC_REG_INTERRUPT);
> > > + }
> > > + }
> > > +}
> > > +
> > > +int hantro_g2_hevc_dec_run(struct hantro_ctx *ctx)
> > > +{
> > > + struct hantro_dev *vpu = ctx->dev;
> > > + int ret;
> > > +
> > > + hantro_g2_check_idle(vpu);
> > > +
> > > + /* Prepare HEVC decoder context. */
> > > + ret = hantro_hevc_dec_prepare_run(ctx);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + /* Configure hardware registers. */
> > > + set_params(ctx);
> > > +
> > > + /* set reference pictures */
> > > + ret = set_ref(ctx);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + set_buffers(ctx);
> > > + prepare_tile_info_buffer(ctx);
> > > +
> > > + hantro_end_prepare_run(ctx);
> > > +
> > > + hantro_reg_write(vpu, hevc_mode, HEVC_DEC_MODE);
> > > + hantro_reg_write(vpu, hevc_clk_gate_e, 1);
> > > +
> > > + /* Don't disable output */
> > > + hantro_reg_write(vpu, hevc_out_dis, 0);
> > > +
> > > + /* Don't compress buffers */
> > > + hantro_reg_write(vpu, hevc_ref_compress_bypass, 1);
> > > +
> > > + /* use NV12 as output format */
> > > + hantro_reg_write(vpu, hevc_out_rs_e, 1);
> > > +
> > > + /* Bus width and max burst */
> > > + hantro_reg_write(vpu, hevc_buswidth, BUS_WIDTH_128);
> > > + hantro_reg_write(vpu, hevc_max_burst, 16);
> > > +
> > > + /* Swap */
> > > + hantro_reg_write(vpu, hevc_strm_swap, 0xf);
> > > + hantro_reg_write(vpu, hevc_dirmv_swap, 0xf);
> > > + hantro_reg_write(vpu, hevc_compress_swap, 0xf);
> > > +
> > > + /* Start decoding! */
> > > + vdpu_write(vpu, HEVC_REG_INTERRUPT_DEC_E, HEVC_REG_INTERRUPT);
> > > +
> > > + return 0;
> > > +}
> > > diff --git a/drivers/staging/media/hantro/hantro_g2_regs.h b/drivers/staging/media/hantro/hantro_g2_regs.h
> > > new file mode 100644
> > > index 000000000000..a361c9ba911d
> > > --- /dev/null
> > > +++ b/drivers/staging/media/hantro/hantro_g2_regs.h
> > > @@ -0,0 +1,198 @@
> > > +/* SPDX-License-Identifier: GPL-2.0-only */
> > > +/*
> > > + * Copyright (c) 2021, Collabora
> > > + *
> > > + * Author: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> > > + */
> > > +
> > > +#ifndef HANTRO_G2_REGS_H_
> > > +#define HANTRO_G2_REGS_H_
> > > +
> > > +#include "hantro.h"
> > > +
> > > +#define G2_SWREG(nr) ((nr) * 4)
> > > +
> > > +#define HEVC_DEC_REG(name, base, shift, mask) \
> > > + static const struct hantro_reg _hevc_##name[] = { \
> > > + { G2_SWREG(base), (shift), (mask) } \
> > > + }; \
> > > + static const struct hantro_reg __maybe_unused *hevc_##name = &_hevc_##name[0];
> > > +
> > > +#define HEVC_REG_VERSION G2_SWREG(0)
> > > +
> > > +#define HEVC_REG_INTERRUPT G2_SWREG(1)
> > > +#define HEVC_REG_INTERRUPT_DEC_RDY_INT BIT(12)
> > > +#define HEVC_REG_INTERRUPT_DEC_ABORT_E BIT(5)
> > > +#define HEVC_REG_INTERRUPT_DEC_IRQ_DIS BIT(4)
> > > +#define HEVC_REG_INTERRUPT_DEC_E BIT(0)
> > > +
> > > +HEVC_DEC_REG(strm_swap, 2, 28, 0xf)
> > > +HEVC_DEC_REG(dirmv_swap, 2, 20, 0xf)
> > > +
> > > +HEVC_DEC_REG(mode, 3, 27, 0x1f)
> > > +HEVC_DEC_REG(compress_swap, 3, 20, 0xf)
> > > +HEVC_DEC_REG(ref_compress_bypass, 3, 17, 0x1)
> > > +HEVC_DEC_REG(out_rs_e, 3, 16, 0x1)
> > > +HEVC_DEC_REG(out_dis, 3, 15, 0x1)
> > > +HEVC_DEC_REG(out_filtering_dis, 3, 14, 0x1)
> > > +HEVC_DEC_REG(write_mvs_e, 3, 12, 0x1)
> > > +
> > > +HEVC_DEC_REG(pic_width_in_cbs, 4, 19, 0x1ff)
> > > +HEVC_DEC_REG(pic_height_in_cbs, 4, 6, 0x1ff)
> > > +HEVC_DEC_REG(num_ref_frames, 4, 0, 0x1f)
> > > +
> > > +HEVC_DEC_REG(scaling_list_e, 5, 24, 0x1)
> > > +HEVC_DEC_REG(cb_qp_offset, 5, 19, 0x1f)
> > > +HEVC_DEC_REG(cr_qp_offset, 5, 14, 0x1f)
> > > +HEVC_DEC_REG(sign_data_hide, 5, 12, 0x1)
> > > +HEVC_DEC_REG(tempor_mvp_e, 5, 11, 0x1)
> > > +HEVC_DEC_REG(max_cu_qpd_depth, 5, 5, 0x3f)
> > > +HEVC_DEC_REG(cu_qpd_e, 5, 4, 0x1)
> > > +
> > > +HEVC_DEC_REG(stream_len, 6, 0, 0xffffffff)
> > > +
> > > +HEVC_DEC_REG(cabac_init_present, 7, 31, 0x1)
> > > +HEVC_DEC_REG(weight_pred_e, 7, 28, 0x1)
> > > +HEVC_DEC_REG(weight_bipr_idc, 7, 26, 0x3)
> > > +HEVC_DEC_REG(filter_over_slices, 7, 25, 0x1)
> > > +HEVC_DEC_REG(filter_over_tiles, 7, 24, 0x1)
> > > +HEVC_DEC_REG(asym_pred_e, 7, 23, 0x1)
> > > +HEVC_DEC_REG(sao_e, 7, 22, 0x1)
> > > +HEVC_DEC_REG(pcm_filt_d, 7, 21, 0x1)
> > > +HEVC_DEC_REG(slice_chqp_present, 7, 20, 0x1)
> > > +HEVC_DEC_REG(dependent_slice, 7, 19, 0x1)
> > > +HEVC_DEC_REG(filter_override, 7, 18, 0x1)
> > > +HEVC_DEC_REG(strong_smooth_e, 7, 17, 0x1)
> > > +HEVC_DEC_REG(filt_offset_beta, 7, 12, 0x1f)
> > > +HEVC_DEC_REG(filt_offset_tc, 7, 7, 0x1f)
> > > +HEVC_DEC_REG(slice_hdr_ext_e, 7, 6, 0x1)
> > > +HEVC_DEC_REG(slice_hdr_ext_bits, 7, 3, 0x7)
> > > +
> > > +HEVC_DEC_REG(const_intra_e, 8, 31, 0x1)
> > > +HEVC_DEC_REG(filt_ctrl_pres, 8, 30, 0x1)
> > > +HEVC_DEC_REG(idr_pic_e, 8, 16, 0x1)
> > > +HEVC_DEC_REG(bit_depth_pcm_y, 8, 12, 0xf)
> > > +HEVC_DEC_REG(bit_depth_pcm_c, 8, 8, 0xf)
> > > +HEVC_DEC_REG(bit_depth_y_minus8, 8, 6, 0x3)
> > > +HEVC_DEC_REG(bit_depth_c_minus8, 8, 4, 0x3)
> > > +HEVC_DEC_REG(output_8_bits, 8, 3, 0x1)
> > > +
> > > +HEVC_DEC_REG(refidx1_active, 9, 19, 0x1f)
> > > +HEVC_DEC_REG(refidx0_active, 9, 14, 0x1f)
> > > +HEVC_DEC_REG(hdr_skip_length, 9, 0, 0x3fff)
> > > +
> > > +HEVC_DEC_REG(start_code_e, 10, 31, 0x1)
> > > +HEVC_DEC_REG(init_qp, 10, 24, 0x3f)
> > > +HEVC_DEC_REG(num_tile_cols, 10, 19, 0x1f)
> > > +HEVC_DEC_REG(num_tile_rows, 10, 14, 0x1f)
> > > +HEVC_DEC_REG(tile_e, 10, 1, 0x1)
> > > +HEVC_DEC_REG(entropy_sync_e, 10, 0, 0x1)
> > > +
> > > +HEVC_DEC_REG(refer_lterm_e, 12, 16, 0xffff)
> > > +HEVC_DEC_REG(min_cb_size, 12, 13, 0x7)
> > > +HEVC_DEC_REG(max_cb_size, 12, 10, 0x7)
> > > +HEVC_DEC_REG(min_pcm_size, 12, 7, 0x7)
> > > +HEVC_DEC_REG(max_pcm_size, 12, 4, 0x7)
> > > +HEVC_DEC_REG(pcm_e, 12, 3, 0x1)
> > > +HEVC_DEC_REG(transform_skip, 12, 2, 0x1)
> > > +HEVC_DEC_REG(transq_bypass, 12, 1, 0x1)
> > > +HEVC_DEC_REG(list_mod_e, 12, 0, 0x1)
> > > +
> > > +HEVC_DEC_REG(min_trb_size, 13, 13, 0x7)
> > > +HEVC_DEC_REG(max_trb_size, 13, 10, 0x7)
> > > +HEVC_DEC_REG(max_intra_hierdepth, 13, 7, 0x7)
> > > +HEVC_DEC_REG(max_inter_hierdepth, 13, 4, 0x7)
> > > +HEVC_DEC_REG(parallel_merge, 13, 0, 0xf)
> > > +
> > > +HEVC_DEC_REG(rlist_f0, 14, 0, 0x1f)
> > > +HEVC_DEC_REG(rlist_f1, 14, 10, 0x1f)
> > > +HEVC_DEC_REG(rlist_f2, 14, 20, 0x1f)
> > > +HEVC_DEC_REG(rlist_b0, 14, 5, 0x1f)
> > > +HEVC_DEC_REG(rlist_b1, 14, 15, 0x1f)
> > > +HEVC_DEC_REG(rlist_b2, 14, 25, 0x1f)
> > > +
> > > +HEVC_DEC_REG(rlist_f3, 15, 0, 0x1f)
> > > +HEVC_DEC_REG(rlist_f4, 15, 10, 0x1f)
> > > +HEVC_DEC_REG(rlist_f5, 15, 20, 0x1f)
> > > +HEVC_DEC_REG(rlist_b3, 15, 5, 0x1f)
> > > +HEVC_DEC_REG(rlist_b4, 15, 15, 0x1f)
> > > +HEVC_DEC_REG(rlist_b5, 15, 25, 0x1f)
> > > +
> > > +HEVC_DEC_REG(rlist_f6, 16, 0, 0x1f)
> > > +HEVC_DEC_REG(rlist_f7, 16, 10, 0x1f)
> > > +HEVC_DEC_REG(rlist_f8, 16, 20, 0x1f)
> > > +HEVC_DEC_REG(rlist_b6, 16, 5, 0x1f)
> > > +HEVC_DEC_REG(rlist_b7, 16, 15, 0x1f)
> > > +HEVC_DEC_REG(rlist_b8, 16, 25, 0x1f)
> > > +
> > > +HEVC_DEC_REG(rlist_f9, 17, 0, 0x1f)
> > > +HEVC_DEC_REG(rlist_f10, 17, 10, 0x1f)
> > > +HEVC_DEC_REG(rlist_f11, 17, 20, 0x1f)
> > > +HEVC_DEC_REG(rlist_b9, 17, 5, 0x1f)
> > > +HEVC_DEC_REG(rlist_b10, 17, 15, 0x1f)
> > > +HEVC_DEC_REG(rlist_b11, 17, 25, 0x1f)
> > > +
> > > +HEVC_DEC_REG(rlist_f12, 18, 0, 0x1f)
> > > +HEVC_DEC_REG(rlist_f13, 18, 10, 0x1f)
> > > +HEVC_DEC_REG(rlist_f14, 18, 20, 0x1f)
> > > +HEVC_DEC_REG(rlist_b12, 18, 5, 0x1f)
> > > +HEVC_DEC_REG(rlist_b13, 18, 15, 0x1f)
> > > +HEVC_DEC_REG(rlist_b14, 18, 25, 0x1f)
> > > +
> > > +HEVC_DEC_REG(rlist_f15, 19, 0, 0x1f)
> > > +HEVC_DEC_REG(rlist_b15, 19, 5, 0x1f)
> > > +
> > > +HEVC_DEC_REG(partial_ctb_x, 20, 31, 0x1)
> > > +HEVC_DEC_REG(partial_ctb_y, 20, 30, 0x1)
> > > +HEVC_DEC_REG(pic_width_4x4, 20, 16, 0xfff)
> > > +HEVC_DEC_REG(pic_height_4x4, 20, 0, 0xfff)
> > > +
> > > +HEVC_DEC_REG(cur_poc_00, 46, 24, 0xff)
> > > +HEVC_DEC_REG(cur_poc_01, 46, 16, 0xff)
> > > +HEVC_DEC_REG(cur_poc_02, 46, 8, 0xff)
> > > +HEVC_DEC_REG(cur_poc_03, 46, 0, 0xff)
> > > +
> > > +HEVC_DEC_REG(cur_poc_04, 47, 24, 0xff)
> > > +HEVC_DEC_REG(cur_poc_05, 47, 16, 0xff)
> > > +HEVC_DEC_REG(cur_poc_06, 47, 8, 0xff)
> > > +HEVC_DEC_REG(cur_poc_07, 47, 0, 0xff)
> > > +
> > > +HEVC_DEC_REG(cur_poc_08, 48, 24, 0xff)
> > > +HEVC_DEC_REG(cur_poc_09, 48, 16, 0xff)
> > > +HEVC_DEC_REG(cur_poc_10, 48, 8, 0xff)
> > > +HEVC_DEC_REG(cur_poc_11, 48, 0, 0xff)
> > > +
> > > +HEVC_DEC_REG(cur_poc_12, 49, 24, 0xff)
> > > +HEVC_DEC_REG(cur_poc_13, 49, 16, 0xff)
> > > +HEVC_DEC_REG(cur_poc_14, 49, 8, 0xff)
> > > +HEVC_DEC_REG(cur_poc_15, 49, 0, 0xff)
> > > +
> > > +HEVC_DEC_REG(apf_threshold, 55, 0, 0xffff)
> > > +
> > > +HEVC_DEC_REG(clk_gate_e, 58, 16, 0x1)
> > > +HEVC_DEC_REG(buswidth, 58, 8, 0x7)
> > > +HEVC_DEC_REG(max_burst, 58, 0, 0xff)
> > > +
> > > +#define HEVC_REG_CONFIG G2_SWREG(58)
> > > +#define HEVC_REG_CONFIG_DEC_CLK_GATE_E BIT(16)
> > > +#define HEVC_REG_CONFIG_DEC_CLK_GATE_IDLE_E BIT(17)
> > > +
> > > +#define HEVC_ADDR_DST (G2_SWREG(65))
> > > +#define HEVC_REG_ADDR_REF(i) (G2_SWREG(67) + ((i) * 0x8))
> > > +#define HEVC_ADDR_DST_CHR (G2_SWREG(99))
> > > +#define HEVC_REG_CHR_REF(i) (G2_SWREG(101) + ((i) * 0x8))
> > > +#define HEVC_ADDR_DST_MV (G2_SWREG(133))
> > > +#define HEVC_REG_DMV_REF(i) (G2_SWREG(135) + ((i) * 0x8))
> > > +#define HEVC_ADDR_TILE_SIZE (G2_SWREG(167))
> > > +#define HEVC_ADDR_STR (G2_SWREG(169))
> > > +#define HEVC_SCALING_LIST (G2_SWREG(171))
> > > +#define HEVC_RASTER_SCAN (G2_SWREG(175))
> > > +#define HEVC_RASTER_SCAN_CHR (G2_SWREG(177))
> > > +#define HEVC_TILE_FILTER (G2_SWREG(179))
> > > +#define HEVC_TILE_SAO (G2_SWREG(181))
> > > +#define HEVC_TILE_BSD (G2_SWREG(183))
> > > +
> > > +HEVC_DEC_REG(strm_buffer_len, 258, 0, 0xffffffff)
> > > +HEVC_DEC_REG(strm_start_offset, 259, 0, 0xffffffff)
> > > +
> > > +#endif
> > > diff --git a/drivers/staging/media/hantro/hantro_hevc.c b/drivers/staging/media/hantro/hantro_hevc.c
> > > new file mode 100644
> > > index 000000000000..8e319a837ff3
> > > --- /dev/null
> > > +++ b/drivers/staging/media/hantro/hantro_hevc.c
> > > @@ -0,0 +1,321 @@
> > > +// SPDX-License-Identifier: GPL-2.0
> > > +/*
> > > + * Hantro VPU HEVC codec driver
> > > + *
> > > + * Copyright (C) 2020 Safran Passenger Innovations LLC
> > > + */
> > > +
> > > +#include <linux/types.h>
> > > +#include <media/v4l2-mem2mem.h>
> > > +
> > > +#include "hantro.h"
> > > +#include "hantro_hw.h"
> > > +
> > > +#define VERT_FILTER_RAM_SIZE 8 /* bytes per pixel row */
> > > +/*
> > > + * BSD control data of current picture at tile border
> > > + * 128 bits per 4x4 tile = 128/(8*4) bytes per row
> > > + */
> > > +#define BSD_CTRL_RAM_SIZE 4 /* bytes per pixel row */
> > > +/* tile border coefficients of filter */
> > > +#define VERT_SAO_RAM_SIZE 48 /* bytes per pixel */
> > > +
> > > +#define MAX_TILE_COLS 20
> > > +#define MAX_TILE_ROWS 22
> > > +
> > > +#define UNUSED_REF -1
> > > +
> > > +#define G2_ALIGN 16
> > > +#define MC_WORD_SIZE 32
> > > +
> > > +size_t hantro_hevc_chroma_offset(const struct v4l2_ctrl_hevc_sps *sps)
> > > +{
> > > + int bytes_per_pixel = sps->bit_depth_luma_minus8 == 0 ? 1 : 2;
> > > +
> > > + return sps->pic_width_in_luma_samples *
> > > + sps->pic_height_in_luma_samples * bytes_per_pixel;
> > > +}
> > > +
> > > +size_t hantro_hevc_motion_vectors_offset(const struct v4l2_ctrl_hevc_sps *sps)
> > > +{
> > > + size_t cr_offset = hantro_hevc_chroma_offset(sps);
> > > +
> > > + return ALIGN((cr_offset * 3) / 2, G2_ALIGN) + MC_WORD_SIZE;
> > > +}
> > > +
> > > +static size_t hantro_hevc_mv_size(const struct v4l2_ctrl_hevc_sps *sps)
> > > +{
> > > + u32 pic_width_in_ctb64 = (sps->pic_width_in_luma_samples + (1 << 8) - 1) >> 8;
> > > + u32 pic_height_in_ctb64 = (sps->pic_height_in_luma_samples + (1 << 8) - 1) >> 8;
> > > + size_t mv_size;
> > > +
> > > + mv_size = (pic_width_in_ctb64 * pic_height_in_ctb64 *
> > > + (1 << (2 * (8 - 4))) * 16) + 32;
> > > +
> > > + vpu_debug(4, "%dx%d (CTBs) %lu MV bytes\n",
> > > + pic_width_in_ctb64, pic_height_in_ctb64, mv_size);
> > > +
> > > + return mv_size;
> > > +}
> > > +
> > > +static size_t hantro_hevc_ref_size(struct hantro_ctx *ctx)
> > > +{
> > > + const struct hantro_hevc_dec_ctrls *ctrls = &ctx->hevc_dec.ctrls;
> > > + const struct v4l2_ctrl_hevc_sps *sps = ctrls->sps;
> > > +
> > > + return hantro_hevc_motion_vectors_offset(sps) + hantro_hevc_mv_size(sps);
> > > +}
> > > +
> > > +static void hantro_hevc_ref_free(struct hantro_ctx *ctx)
> > > +{
> > > + struct hantro_hevc_dec_hw_ctx *hevc_dec = &ctx->hevc_dec;
> > > + struct hantro_dev *vpu = ctx->dev;
> > > + int i;
> > > +
> > > + /* Just tag buffer as unused, do not free them */
> > This comment seems wrong.
>
> You are right I will remove it.
>
> >
> > > + for (i = 0; i < NUM_REF_PICTURES; i++) {
> > > + if (hevc_dec->ref_bufs[i].cpu) {
> > > + memset(hevc_dec->ref_bufs[i].cpu, 0, hantro_hevc_ref_size(ctx));
> > Is this memset clearing the buffer required? If we're getting artifacts
> > from previous decodes, then that would be more of a bug somewhere.
>
> Clear is done after allocating/reused the buffer I can remove this one.
>
> >
> > > + dma_free_coherent(vpu->dev, hevc_dec->ref_bufs[i].size,
> > > + hevc_dec->ref_bufs[i].cpu,
> > > + hevc_dec->ref_bufs[i].dma);
> > > + }
> > > + }
> > > +}
> > > +
> > > +static void hantro_hevc_ref_init(struct hantro_ctx *ctx)
> > > +{
> > > + struct hantro_hevc_dec_hw_ctx *hevc_dec = &ctx->hevc_dec;
> > > + int i;
> > > +
> > > + for (i = 0; i < NUM_REF_PICTURES; i++)
> > > + hevc_dec->ref_bufs_poc[i] = UNUSED_REF;
> > > +}
> > > +
> > > +dma_addr_t hantro_hevc_get_ref_buf(struct hantro_ctx *ctx,
> > > + int poc)
> > > +{
> > > + struct hantro_hevc_dec_hw_ctx *hevc_dec = &ctx->hevc_dec;
> > > + int i;
> > > +
> > > + /* Find the reference buffer in already know ones */
> > > + for (i = 0; i < NUM_REF_PICTURES; i++) {
> > > + if (hevc_dec->ref_bufs_poc[i] == poc) {
> > > + hevc_dec->ref_bufs_used |= 1 << i;
> > > + return hevc_dec->ref_bufs[i].dma;
> > > + }
> > > + }
> > > +
> > > + /* Allocate a new reference buffer */
> > > + for (i = 0; i < NUM_REF_PICTURES; i++) {
> > > + if (hevc_dec->ref_bufs_poc[i] == UNUSED_REF) {
> > > + if (!hevc_dec->ref_bufs[i].cpu) {
> > > + struct hantro_dev *vpu = ctx->dev;
> > > +
> > > + hevc_dec->ref_bufs[i].cpu =
> > > + dma_alloc_coherent(vpu->dev,
> > > + hantro_hevc_ref_size(ctx),
> > > + &hevc_dec->ref_bufs[i].dma,
> > > + GFP_KERNEL);
> > Is there any reason why we need to allocate reference buffers and MV contiguously?
>
> It is done like that in IMX reference code and makes the management of reference frame
> and MV more simple.
>
> >
> > > + if (!hevc_dec->ref_bufs[i].cpu)
> > > + return 0;
> > > +
> > > + hevc_dec->ref_bufs[i].size = hantro_hevc_ref_size(ctx);
> > > + }
> > > + hevc_dec->ref_bufs_used |= 1 << i;
> > > + memset(hevc_dec->ref_bufs[i].cpu, 0, hantro_hevc_ref_size(ctx));
> >
> > I believe the coherent allocation is to be able to clear each reference, but is this
> > really needed? I recall maybe only the MV buffer needs clearing, maybe you can try that?
> >
> > Also, if that's the case, then allocating the MV buffer separatedly will allow
> > to not allocate the reference buffers coherently (note that we use NO_MAPPING
> > in the vb2_queue, so the vb2_buffers shouldn't be coherent).
>
> That sound like good possible optimizations but I'm not at this stage.
> I would rather keep it in this fairly functional state and improve it later.
> I think the patches are already enough larges and complexes like that.
>
Fair enough. I think it's great to have a first working
version :)
Could you add a comment for this, specially at the
memset's and the dma_alloc_coherent, (or optionally
at the header of this .c file), in case someone
wants to revisit this topic?
Thanks a lot!
Ezequiel
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