drm/i915/dsc: have intel_dsc_pps_read_and_verify() return the value

Register read functions usually return the value instead of passing via
pointer parameters. The calling code becomes easier to read.

Make the name conform to existing style better while at it.

Cc: Suraj Kandpal <suraj.kandpal@intel.com>
Cc: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/89b7d70bb19114ab3ff0e150a4b862d8032f136d.1693933849.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_vdsc.c

@@ -840,15 +840,17 @@ static bool intel_dsc_read_pps_reg(struct intel_crtc_state *crtc_state,
 	return true;
 }
 
-static void intel_dsc_read_and_verify_pps_reg(struct intel_crtc_state *crtc_state,
-					      int pps, u32 *pps_val)
+static u32 intel_dsc_pps_read_and_verify(struct intel_crtc_state *crtc_state, int pps)
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	struct drm_i915_private *i915 = to_i915(crtc->base.dev);
+	u32 val;
 	int ret;
 
-	ret = intel_dsc_read_pps_reg(crtc_state, pps, pps_val);
+	ret = intel_dsc_read_pps_reg(crtc_state, pps, &val);
 	drm_WARN_ON(&i915->drm, !ret);
+
+	return val;
 }
 
 static void intel_dsc_get_pps_config(struct intel_crtc_state *crtc_state)
@@ -860,7 +862,7 @@ static void intel_dsc_get_pps_config(struct intel_crtc_state *crtc_state)
 	u32 pps_temp;
 
 	/* PPS_0 */
-	intel_dsc_read_and_verify_pps_reg(crtc_state, 0, &pps_temp);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 0);
 
 	vdsc_cfg->bits_per_component = (pps_temp & DSC_BPC_MASK) >> DSC_BPC_SHIFT;
 	vdsc_cfg->line_buf_depth =
@@ -873,7 +875,7 @@ static void intel_dsc_get_pps_config(struct intel_crtc_state *crtc_state)
 	vdsc_cfg->vbr_enable = pps_temp & DSC_VBR_ENABLE;
 
 	/* PPS_1 */
-	intel_dsc_read_and_verify_pps_reg(crtc_state, 1, &pps_temp);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 1);
 
 	vdsc_cfg->bits_per_pixel = pps_temp;
 
@@ -883,31 +885,31 @@ static void intel_dsc_get_pps_config(struct intel_crtc_state *crtc_state)
 	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);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 2);
 
 	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);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 3);
 
 	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);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 4);
 
 	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);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 5);
 
 	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);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 6);
 
 	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);
@@ -915,41 +917,41 @@ static void intel_dsc_get_pps_config(struct intel_crtc_state *crtc_state)
 	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);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 7);
 
 	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);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 8);
 
 	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);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 9);
 
 	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);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 10);
 
 	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);
+	pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 16);
 
 	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);
+		pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 17);
 
 		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);
+		pps_temp = intel_dsc_pps_read_and_verify(crtc_state, 18);
 
 		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);