[Intel-gfx] [PATCH v8 7/8] drm/i915/vdsc: Fill the intel_dsc_get_pps_config function

Tue Aug 22 04:18:12 UTC 2023

On 8/17/2023 2:05 PM, Suraj Kandpal wrote:
> We have setup both the read and write functions so we can
> move ahead and fill in all the readout state from PPS register
> into the crtc_state so we can send it for comparision.
>
> --v2
> -Shorten comment to just PPSX rather than having the whole
> "Readout PPSX register" [Jani]
> -Remove pps_temp reinitialization as its being initialized in
> the read function [Jani]
> -Use REG_FIELD_GET to readout certain fields of dsc registers
> [Jani]
>
> Signed-off-by: Suraj Kandpal <suraj.kandpal at intel.com>
> ---
>   drivers/gpu/drm/i915/display/intel_vdsc.c     | 99 +++++++++++++++++--
>   .../gpu/drm/i915/display/intel_vdsc_regs.h    |  3 +
>   2 files changed, 95 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
> index e6c2d3ae60aa..5381976153f8 100644
> --- a/drivers/gpu/drm/i915/display/intel_vdsc.c
> +++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
> @@ -852,20 +852,105 @@ static void intel_dsc_read_and_verify_pps_reg(struct intel_crtc_state *crtc_stat
>   static void intel_dsc_get_pps_config(struct intel_crtc_state *crtc_state)
>   {
>   	struct drm_dsc_config *vdsc_cfg = &crtc_state->dsc.config;
> -	u32 pps_temp1, pps_temp2;
> +	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> +	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
> +	u32 pps_temp;
>   
> -	/* FIXME: add more state readout as needed */
> +	/* PPS_0 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 0, &pps_temp);
>   
> -	/* Readout PPS_0 and PPS_1 registers */
> -	intel_dsc_read_and_verify_pps_reg(crtc_state, 0, &pps_temp1);
> -	intel_dsc_read_and_verify_pps_reg(crtc_state, 1, &pps_temp2);
> +	vdsc_cfg->bits_per_component = (pps_temp & DSC_BPC_MASK) >> DSC_BPC_SHIFT;
> +	vdsc_cfg->line_buf_depth =
> +		(pps_temp & DSC_LINE_BUF_DEPTH_MASK) >> DSC_LINE_BUF_DEPTH_SHIFT;
> +	vdsc_cfg->block_pred_enable = pps_temp & DSC_BLOCK_PREDICTION;
> +	vdsc_cfg->convert_rgb = pps_temp & DSC_COLOR_SPACE_CONVERSION;
> +	vdsc_cfg->simple_422 = pps_temp & DSC_422_ENABLE;
> +	vdsc_cfg->native_422 = pps_temp & DSC_NATIVE_422_ENABLE;
> +	vdsc_cfg->native_420 = pps_temp & DSC_NATIVE_420_ENABLE;
> +	vdsc_cfg->vbr_enable = pps_temp & DSC_VBR_ENABLE;
>   
> -	vdsc_cfg->bits_per_pixel = pps_temp2;
> +	/* PPS_1 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 1, &pps_temp);
>   
> -	if (pps_temp1 & DSC_NATIVE_420_ENABLE)
> +	vdsc_cfg->bits_per_pixel = pps_temp;
> +
> +	if (vdsc_cfg->native_420)
>   		vdsc_cfg->bits_per_pixel >>= 1;
>   
>   	crtc_state->dsc.compressed_bpp = vdsc_cfg->bits_per_pixel >> 4;
> +
> +	/* PPS_2 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 2, &pps_temp);
> +
> +	vdsc_cfg->pic_width = REG_FIELD_GET(DSC_PIC_WIDTH_MASK, pps_temp);
> +	vdsc_cfg->pic_height = REG_FIELD_GET(DSC_PIC_HEIGHT_MASK, pps_temp);
> +
> +	/* PPS_3 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 3, &pps_temp);
> +
> +	vdsc_cfg->slice_width = REG_FIELD_GET(DSC_SLICE_WIDTH_MASK, pps_temp);
> +	vdsc_cfg->slice_height = REG_FIELD_GET(DSC_SLICE_HEIGHT_MASK, pps_temp);
> +
> +	/* PPS_4 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 4, &pps_temp);
> +
> +	vdsc_cfg->initial_dec_delay = REG_FIELD_GET(DSC_INITIAL_DEC_DELAY_MASK, pps_temp);
> +	vdsc_cfg->initial_xmit_delay = REG_FIELD_GET(DSC_INITIAL_XMIT_DELAY_MASK, pps_temp);
> +
> +	/* PPS_5 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 5, &pps_temp);
> +
> +	vdsc_cfg->scale_decrement_interval = REG_FIELD_GET(DSC_SCALE_DEC_INT_MASK, pps_temp);
> +	vdsc_cfg->scale_increment_interval = REG_FIELD_GET(DSC_SCALE_INC_INT_MASK, pps_temp);
> +
> +	/* PPS_6 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 6, &pps_temp);
> +
> +	vdsc_cfg->initial_scale_value = REG_FIELD_GET(DSC_INITIAL_SCALE_VALUE_MASK, pps_temp);
> +	vdsc_cfg->first_line_bpg_offset = REG_FIELD_GET(DSC_FIRST_LINE_BPG_OFFSET_MASK, pps_temp);
> +	vdsc_cfg->flatness_min_qp = REG_FIELD_GET(DSC_FLATNESS_MIN_QP_MASK, pps_temp);
> +	vdsc_cfg->flatness_max_qp = REG_FIELD_GET(DSC_FLATNESS_MAX_QP_MASK, pps_temp);
> +
> +	/* PPS_7 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 7, &pps_temp);
> +
> +	vdsc_cfg->nfl_bpg_offset = REG_FIELD_GET(DSC_NFL_BPG_OFFSET_MASK, pps_temp);
> +	vdsc_cfg->slice_bpg_offset = REG_FIELD_GET(DSC_SLICE_BPG_OFFSET_MASK, pps_temp);
> +
> +	/* PPS_8 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 8, &pps_temp);
> +
> +	vdsc_cfg->initial_offset = REG_FIELD_GET(DSC_INITIAL_OFFSET_MASK, pps_temp);
> +	vdsc_cfg->final_offset = REG_FIELD_GET(DSC_FINAL_OFFSET_MASK, pps_temp);
> +
> +	/* PPS_9 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 9, &pps_temp);
> +
> +	vdsc_cfg->rc_model_size = REG_FIELD_GET(DSC_RC_MODEL_SIZE_MASK, pps_temp);
> +
> +	/* PPS_10 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 10, &pps_temp);
> +
> +	vdsc_cfg->rc_quant_incr_limit0 = REG_FIELD_GET(DSC_RC_QUANT_INC_LIMIT0_MASK, pps_temp);
> +	vdsc_cfg->rc_quant_incr_limit1 = REG_FIELD_GET(DSC_RC_QUANT_INC_LIMIT1_MASK, pps_temp);
> +
> +	/* PPS_16 */
> +	intel_dsc_read_and_verify_pps_reg(crtc_state, 16, &pps_temp);
> +
> +	vdsc_cfg->slice_chunk_size = REG_FIELD_GET(DSC_SLICE_CHUNK_SIZE_MASK, pps_temp);
> +
> +	if (DISPLAY_VER(i915) >= 14) {
> +		/* PPS_17 */
> +		intel_dsc_read_and_verify_pps_reg(crtc_state, 17, &pps_temp);
> +
> +		vdsc_cfg->second_line_bpg_offset = REG_FIELD_GET(DSC_SL_BPG_OFFSET_MASK, pps_temp);
> +
> +		/* PPS_18 */
> +		intel_dsc_read_and_verify_pps_reg(crtc_state, 18, &pps_temp);
> +
> +		vdsc_cfg->nsl_bpg_offset = REG_FIELD_GET(DSC_NSL_BPG_OFFSET_MASK, pps_temp);
> +		vdsc_cfg->second_line_offset_adj = REG_FIELD_GET(DSC_SL_OFFSET_ADJ_MASK, pps_temp);
> +	}
>   }
>   
>   void intel_dsc_get_config(struct intel_crtc_state *crtc_state)
> diff --git a/drivers/gpu/drm/i915/display/intel_vdsc_regs.h b/drivers/gpu/drm/i915/display/intel_vdsc_regs.h
> index 7afc487223fb..8d4fcacd1229 100644
> --- a/drivers/gpu/drm/i915/display/intel_vdsc_regs.h
> +++ b/drivers/gpu/drm/i915/display/intel_vdsc_regs.h
> @@ -76,6 +76,9 @@
>   #define  DSC_BPC_SHIFT			8
>   #define  DSC_VER_MIN_SHIFT		4
>   #define  DSC_VER_MAJ			(0x1 << 0)
> +#define  DSC_LINE_BUF_DEPTH_MASK	REG_GENMASK(15, 12)
> +#define  DSC_BPC_MASK			REG_GENMASK(11, 8)

Perhaps move these near the DSC_LINE_BUF_DEPTH_SHIFT and DSC_BPC_SHIFT.

In any case, the patch looks good to me.

Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>

> +
>   
>   /* PPS1 */
>   #define  DSC_BPP(bpp)				((bpp) << 0)