[PATCH v2 3/3] drm/dsc: Split DSC PPS and SDP header initialisations
Manasi Navare
manasi.d.navare at intel.com
Mon Feb 25 18:58:53 UTC 2019
On Thu, Feb 21, 2019 at 03:20:01PM -0500, David Francis wrote:
> The DP 1.4 spec defines the SDP header and SDP contents for
> a Picture Parameter Set (PPS) that must be sent in advance
> of DSC transmission to define the encoding characteristics.
>
> This was done in one struct, drm_dsc_pps_infoframe, which
> conatined the SDP header and PPS. Because the PPS is
> a property of DSC over any connector, not just DP, and because
> drm drivers may have their own SDP structs they wish to use,
> make the functions that initialise SDP and PPS headers take
> the components they operate on, not drm_dsc_pps_infoframe,
>
> Signed-off-by: David Francis <David.Francis at amd.com>
The corresponding changes for the header init and payload init now
look good to me.
Reviewed-by: Manasi Navare <manasi.d.navare at intel.com>
Manasi
> ---
> drivers/gpu/drm/drm_dsc.c | 117 +++++++++++++++---------------
> drivers/gpu/drm/i915/intel_vdsc.c | 4 +-
> include/drm/drm_dsc.h | 4 +-
> 3 files changed, 62 insertions(+), 63 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_dsc.c b/drivers/gpu/drm/drm_dsc.c
> index d77570bf6ac4..77f4e5ae4197 100644
> --- a/drivers/gpu/drm/drm_dsc.c
> +++ b/drivers/gpu/drm/drm_dsc.c
> @@ -32,66 +32,65 @@
> /**
> * drm_dsc_dp_pps_header_init() - Initializes the PPS Header
> * for DisplayPort as per the DP 1.4 spec.
> - * @pps_sdp: Secondary data packet for DSC Picture Parameter Set
> - * as defined in &struct drm_dsc_pps_infoframe
> + * @pps_header: Secondary data packet header for DSC Picture
> + * Parameter Set as defined in &struct dp_sdp_header
> *
> * DP 1.4 spec defines the secondary data packet for sending the
> * picture parameter infoframes from the source to the sink.
> - * This function populates the pps header defined in
> - * &struct drm_dsc_pps_infoframe as per the header bytes defined
> - * in &struct dp_sdp_header.
> + * This function populates the SDP header defined in
> + * &struct dp_sdp_header.
> */
> -void drm_dsc_dp_pps_header_init(struct drm_dsc_pps_infoframe *pps_sdp)
> +void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header)
> {
> - memset(&pps_sdp->pps_header, 0, sizeof(pps_sdp->pps_header));
> + memset(pps_header, 0, sizeof(*pps_header));
>
> - pps_sdp->pps_header.HB1 = DP_SDP_PPS;
> - pps_sdp->pps_header.HB2 = DP_SDP_PPS_HEADER_PAYLOAD_BYTES_MINUS_1;
> + pps_header->HB1 = DP_SDP_PPS;
> + pps_header->HB2 = DP_SDP_PPS_HEADER_PAYLOAD_BYTES_MINUS_1;
> }
> EXPORT_SYMBOL(drm_dsc_dp_pps_header_init);
>
> /**
> - * drm_dsc_pps_infoframe_pack() - Populates the DSC PPS infoframe
> + * drm_dsc_pps_payload_pack() - Populates the DSC PPS
> *
> - * @pps_sdp:
> - * Secondary data packet for DSC Picture Parameter Set. This is defined
> - * by &struct drm_dsc_pps_infoframe
> + * @pps_payload:
> + * Bitwise struct for DSC Picture Parameter Set. This is defined
> + * by &struct drm_dsc_picture_parameter_set
> * @dsc_cfg:
> * DSC Configuration data filled by driver as defined by
> * &struct drm_dsc_config
> *
> - * DSC source device sends a secondary data packet filled with all the
> - * picture parameter set (PPS) information required by the sink to decode
> - * the compressed frame. Driver populates the dsC PPS infoframe using the DSC
> - * configuration parameters in the order expected by the DSC Display Sink
> - * device. For the DSC, the sink device expects the PPS payload in the big
> - * endian format for the fields that span more than 1 byte.
> + * DSC source device sends a picture parameter set (PPS) containing the
> + * information required by the sink to decode the compressed frame. Driver
> + * populates the DSC PPS struct using the DSC configuration parameters in
> + * the order expected by the DSC Display Sink device. For the DSC, the sink
> + * device expects the PPS payload in big endian format for fields
> + * that span more than 1 byte.
> */
> -void drm_dsc_pps_infoframe_pack(struct drm_dsc_pps_infoframe *pps_sdp,
> +void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_payload,
> const struct drm_dsc_config *dsc_cfg)
> {
> int i;
>
> /* Protect against someone accidently changing struct size */
> - BUILD_BUG_ON(sizeof(pps_sdp->pps_payload) !=
> + BUILD_BUG_ON(sizeof(*pps_payload) !=
> DP_SDP_PPS_HEADER_PAYLOAD_BYTES_MINUS_1 + 1);
>
> - memset(&pps_sdp->pps_payload, 0, sizeof(pps_sdp->pps_payload));
> + memset(pps_payload, 0, sizeof(*pps_payload));
>
> /* PPS 0 */
> - pps_sdp->pps_payload.dsc_version =
> + pps_payload->dsc_version =
> dsc_cfg->dsc_version_minor |
> dsc_cfg->dsc_version_major << DSC_PPS_VERSION_MAJOR_SHIFT;
>
> /* PPS 1, 2 is 0 */
>
> /* PPS 3 */
> - pps_sdp->pps_payload.pps_3 =
> + pps_payload->pps_3 =
> dsc_cfg->line_buf_depth |
> dsc_cfg->bits_per_component << DSC_PPS_BPC_SHIFT;
>
> /* PPS 4 */
> - pps_sdp->pps_payload.pps_4 =
> + pps_payload->pps_4 =
> ((dsc_cfg->bits_per_pixel & DSC_PPS_BPP_HIGH_MASK) >>
> DSC_PPS_MSB_SHIFT) |
> dsc_cfg->vbr_enable << DSC_PPS_VBR_EN_SHIFT |
> @@ -100,7 +99,7 @@ void drm_dsc_pps_infoframe_pack(struct drm_dsc_pps_infoframe *pps_sdp,
> dsc_cfg->block_pred_enable << DSC_PPS_BLOCK_PRED_EN_SHIFT;
>
> /* PPS 5 */
> - pps_sdp->pps_payload.bits_per_pixel_low =
> + pps_payload->bits_per_pixel_low =
> (dsc_cfg->bits_per_pixel & DSC_PPS_LSB_MASK);
>
> /*
> @@ -111,103 +110,103 @@ void drm_dsc_pps_infoframe_pack(struct drm_dsc_pps_infoframe *pps_sdp,
> */
>
> /* PPS 6, 7 */
> - pps_sdp->pps_payload.pic_height = cpu_to_be16(dsc_cfg->pic_height);
> + pps_payload->pic_height = cpu_to_be16(dsc_cfg->pic_height);
>
> /* PPS 8, 9 */
> - pps_sdp->pps_payload.pic_width = cpu_to_be16(dsc_cfg->pic_width);
> + pps_payload->pic_width = cpu_to_be16(dsc_cfg->pic_width);
>
> /* PPS 10, 11 */
> - pps_sdp->pps_payload.slice_height = cpu_to_be16(dsc_cfg->slice_height);
> + pps_payload->slice_height = cpu_to_be16(dsc_cfg->slice_height);
>
> /* PPS 12, 13 */
> - pps_sdp->pps_payload.slice_width = cpu_to_be16(dsc_cfg->slice_width);
> + pps_payload->slice_width = cpu_to_be16(dsc_cfg->slice_width);
>
> /* PPS 14, 15 */
> - pps_sdp->pps_payload.chunk_size = cpu_to_be16(dsc_cfg->slice_chunk_size);
> + pps_payload->chunk_size = cpu_to_be16(dsc_cfg->slice_chunk_size);
>
> /* PPS 16 */
> - pps_sdp->pps_payload.initial_xmit_delay_high =
> + pps_payload->initial_xmit_delay_high =
> ((dsc_cfg->initial_xmit_delay &
> DSC_PPS_INIT_XMIT_DELAY_HIGH_MASK) >>
> DSC_PPS_MSB_SHIFT);
>
> /* PPS 17 */
> - pps_sdp->pps_payload.initial_xmit_delay_low =
> + pps_payload->initial_xmit_delay_low =
> (dsc_cfg->initial_xmit_delay & DSC_PPS_LSB_MASK);
>
> /* PPS 18, 19 */
> - pps_sdp->pps_payload.initial_dec_delay =
> + pps_payload->initial_dec_delay =
> cpu_to_be16(dsc_cfg->initial_dec_delay);
>
> /* PPS 20 is 0 */
>
> /* PPS 21 */
> - pps_sdp->pps_payload.initial_scale_value =
> + pps_payload->initial_scale_value =
> dsc_cfg->initial_scale_value;
>
> /* PPS 22, 23 */
> - pps_sdp->pps_payload.scale_increment_interval =
> + pps_payload->scale_increment_interval =
> cpu_to_be16(dsc_cfg->scale_increment_interval);
>
> /* PPS 24 */
> - pps_sdp->pps_payload.scale_decrement_interval_high =
> + pps_payload->scale_decrement_interval_high =
> ((dsc_cfg->scale_decrement_interval &
> DSC_PPS_SCALE_DEC_INT_HIGH_MASK) >>
> DSC_PPS_MSB_SHIFT);
>
> /* PPS 25 */
> - pps_sdp->pps_payload.scale_decrement_interval_low =
> + pps_payload->scale_decrement_interval_low =
> (dsc_cfg->scale_decrement_interval & DSC_PPS_LSB_MASK);
>
> /* PPS 26[7:0], PPS 27[7:5] RESERVED */
>
> /* PPS 27 */
> - pps_sdp->pps_payload.first_line_bpg_offset =
> + pps_payload->first_line_bpg_offset =
> dsc_cfg->first_line_bpg_offset;
>
> /* PPS 28, 29 */
> - pps_sdp->pps_payload.nfl_bpg_offset =
> + pps_payload->nfl_bpg_offset =
> cpu_to_be16(dsc_cfg->nfl_bpg_offset);
>
> /* PPS 30, 31 */
> - pps_sdp->pps_payload.slice_bpg_offset =
> + pps_payload->slice_bpg_offset =
> cpu_to_be16(dsc_cfg->slice_bpg_offset);
>
> /* PPS 32, 33 */
> - pps_sdp->pps_payload.initial_offset =
> + pps_payload->initial_offset =
> cpu_to_be16(dsc_cfg->initial_offset);
>
> /* PPS 34, 35 */
> - pps_sdp->pps_payload.final_offset = cpu_to_be16(dsc_cfg->final_offset);
> + pps_payload->final_offset = cpu_to_be16(dsc_cfg->final_offset);
>
> /* PPS 36 */
> - pps_sdp->pps_payload.flatness_min_qp = dsc_cfg->flatness_min_qp;
> + pps_payload->flatness_min_qp = dsc_cfg->flatness_min_qp;
>
> /* PPS 37 */
> - pps_sdp->pps_payload.flatness_max_qp = dsc_cfg->flatness_max_qp;
> + pps_payload->flatness_max_qp = dsc_cfg->flatness_max_qp;
>
> /* PPS 38, 39 */
> - pps_sdp->pps_payload.rc_model_size =
> + pps_payload->rc_model_size =
> cpu_to_be16(DSC_RC_MODEL_SIZE_CONST);
>
> /* PPS 40 */
> - pps_sdp->pps_payload.rc_edge_factor = DSC_RC_EDGE_FACTOR_CONST;
> + pps_payload->rc_edge_factor = DSC_RC_EDGE_FACTOR_CONST;
>
> /* PPS 41 */
> - pps_sdp->pps_payload.rc_quant_incr_limit0 =
> + pps_payload->rc_quant_incr_limit0 =
> dsc_cfg->rc_quant_incr_limit0;
>
> /* PPS 42 */
> - pps_sdp->pps_payload.rc_quant_incr_limit1 =
> + pps_payload->rc_quant_incr_limit1 =
> dsc_cfg->rc_quant_incr_limit1;
>
> /* PPS 43 */
> - pps_sdp->pps_payload.rc_tgt_offset = DSC_RC_TGT_OFFSET_LO_CONST |
> + pps_payload->rc_tgt_offset = DSC_RC_TGT_OFFSET_LO_CONST |
> DSC_RC_TGT_OFFSET_HI_CONST << DSC_PPS_RC_TGT_OFFSET_HI_SHIFT;
>
> /* PPS 44 - 57 */
> for (i = 0; i < DSC_NUM_BUF_RANGES - 1; i++)
> - pps_sdp->pps_payload.rc_buf_thresh[i] =
> + pps_payload->rc_buf_thresh[i] =
> dsc_cfg->rc_buf_thresh[i];
>
> /* PPS 58 - 87 */
> @@ -216,35 +215,35 @@ void drm_dsc_pps_infoframe_pack(struct drm_dsc_pps_infoframe *pps_sdp,
> * are as follows: Min_qp[15:11], max_qp[10:6], offset[5:0]
> */
> for (i = 0; i < DSC_NUM_BUF_RANGES; i++) {
> - pps_sdp->pps_payload.rc_range_parameters[i] =
> + pps_payload->rc_range_parameters[i] =
> ((dsc_cfg->rc_range_params[i].range_min_qp <<
> DSC_PPS_RC_RANGE_MINQP_SHIFT) |
> (dsc_cfg->rc_range_params[i].range_max_qp <<
> DSC_PPS_RC_RANGE_MAXQP_SHIFT) |
> (dsc_cfg->rc_range_params[i].range_bpg_offset));
> - pps_sdp->pps_payload.rc_range_parameters[i] =
> - cpu_to_be16(pps_sdp->pps_payload.rc_range_parameters[i]);
> + pps_payload->rc_range_parameters[i] =
> + cpu_to_be16(pps_payload->rc_range_parameters[i]);
> }
>
> /* PPS 88 */
> - pps_sdp->pps_payload.native_422_420 = dsc_cfg->native_422 |
> + pps_payload->native_422_420 = dsc_cfg->native_422 |
> dsc_cfg->native_420 << DSC_PPS_NATIVE_420_SHIFT;
>
> /* PPS 89 */
> - pps_sdp->pps_payload.second_line_bpg_offset =
> + pps_payload->second_line_bpg_offset =
> dsc_cfg->second_line_bpg_offset;
>
> /* PPS 90, 91 */
> - pps_sdp->pps_payload.nsl_bpg_offset =
> + pps_payload->nsl_bpg_offset =
> cpu_to_be16(dsc_cfg->nsl_bpg_offset);
>
> /* PPS 92, 93 */
> - pps_sdp->pps_payload.second_line_offset_adj =
> + pps_payload->second_line_offset_adj =
> cpu_to_be16(dsc_cfg->second_line_offset_adj);
>
> /* PPS 94 - 127 are O */
> }
> -EXPORT_SYMBOL(drm_dsc_pps_infoframe_pack);
> +EXPORT_SYMBOL(drm_dsc_pps_payload_pack);
>
> /**
> * drm_dsc_compute_rc_parameters() - Write rate control
> diff --git a/drivers/gpu/drm/i915/intel_vdsc.c b/drivers/gpu/drm/i915/intel_vdsc.c
> index 8c8d96157333..3f9921ba4a76 100644
> --- a/drivers/gpu/drm/i915/intel_vdsc.c
> +++ b/drivers/gpu/drm/i915/intel_vdsc.c
> @@ -881,10 +881,10 @@ static void intel_dp_write_dsc_pps_sdp(struct intel_encoder *encoder,
> struct drm_dsc_pps_infoframe dp_dsc_pps_sdp;
>
> /* Prepare DP SDP PPS header as per DP 1.4 spec, Table 2-123 */
> - drm_dsc_dp_pps_header_init(&dp_dsc_pps_sdp);
> + drm_dsc_dp_pps_header_init(&dp_dsc_pps_sdp.pps_header);
>
> /* Fill the PPS payload bytes as per DSC spec 1.2 Table 4-1 */
> - drm_dsc_pps_infoframe_pack(&dp_dsc_pps_sdp, vdsc_cfg);
> + drm_dsc_pps_payload_pack(&dp_dsc_pps_sdp.pps_payload, vdsc_cfg);
>
> intel_dig_port->write_infoframe(encoder, crtc_state,
> DP_SDP_PPS, &dp_dsc_pps_sdp,
> diff --git a/include/drm/drm_dsc.h b/include/drm/drm_dsc.h
> index f26a89e1b68a..887954cbfc60 100644
> --- a/include/drm/drm_dsc.h
> +++ b/include/drm/drm_dsc.h
> @@ -601,8 +601,8 @@ struct drm_dsc_pps_infoframe {
> struct drm_dsc_picture_parameter_set pps_payload;
> } __packed;
>
> -void drm_dsc_dp_pps_header_init(struct drm_dsc_pps_infoframe *pps_sdp);
> -void drm_dsc_pps_infoframe_pack(struct drm_dsc_pps_infoframe *pps_sdp,
> +void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header);
> +void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp,
> const struct drm_dsc_config *dsc_cfg);
> int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg);
>
> --
> 2.17.1
>
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