[v12,7/8] drm/i915/vdsc: Fill the intel_dsc_get_pps_config function

Commit Message

Kandpal, Suraj Aug. 28, 2023, 5:43 a.m. UTC

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]

--v9
-Place the masks at a more appropriate place [Ankit]

Signed-off-by: Suraj Kandpal <[e-mail]>
Reviewed-by: Ankit Nautiyal <[e-mail]>
---
 drivers/gpu/drm/i915/display/intel_vdsc.c     | 100 ++++++++++++++++--
 .../gpu/drm/i915/display/intel_vdsc_regs.h    |   2 +
 2 files changed, 95 insertions(+), 7 deletions(-)

Patch

diff --git a/drivers/gpu/drm/i915/display/intel_vdsc.c b/drivers/gpu/drm/i915/display/intel_vdsc.c
index 7dfc87421b92..b24601d0b2c5 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc.c
+++ b/drivers/gpu/drm/i915/display/intel_vdsc.c
@@ -852,20 +852,106 @@  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);
+	int num_vdsc_instances = intel_dsc_get_num_vdsc_instances(crtc_state);
+	u32 pps_temp;
+
+	/* PPS_0 */
+	intel_dsc_read_and_verify_pps_reg(crtc_state, 0, &pps_temp);
 
-	/* FIXME: add more state readout as needed */
+	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;
 
-	/* 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);
+	/* PPS_1 */
+	intel_dsc_read_and_verify_pps_reg(crtc_state, 1, &pps_temp);
 
-	vdsc_cfg->bits_per_pixel = pps_temp2;
+	vdsc_cfg->bits_per_pixel = pps_temp;
 
-	if (pps_temp1 & DSC_NATIVE_420_ENABLE)
+	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) / num_vdsc_instances;
+	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 4c9a51df4775..5cbcbd9db7b1 100644
--- a/drivers/gpu/drm/i915/display/intel_vdsc_regs.h
+++ b/drivers/gpu/drm/i915/display/intel_vdsc_regs.h
@@ -81,7 +81,9 @@ 
 #define  DSC_COLOR_SPACE_CONVERSION	(1 << 17)
 #define  DSC_BLOCK_PREDICTION		(1 << 16)
 #define  DSC_LINE_BUF_DEPTH_SHIFT	12
+#define  DSC_LINE_BUF_DEPTH_MASK	REG_GENMASK(15, 12)
 #define  DSC_BPC_SHIFT			8
+#define  DSC_BPC_MASK			REG_GENMASK(11, 8)
 #define  DSC_VER_MIN_SHIFT		4
 #define  DSC_VER_MAJ			(0x1 << 0)