drm/edid: Split DSC parsing into separate function

Move the DSC parsing logic into separate function.

v2: Rebase.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220916100551.2531750-3-ankit.k.nautiyal@intel.com

drivers/gpu/drm/drm_edid.c

@@ -5752,6 +5752,73 @@ static void drm_parse_ycbcr420_deep_color_info(struct drm_connector *connector,
 	hdmi->y420_dc_modes = dc_mask;
 }
 
+static void drm_parse_dsc_info(struct drm_hdmi_dsc_cap *hdmi_dsc,
+			       const u8 *hf_scds)
+{
+	u8 dsc_max_slices;
+	u8 dsc_max_frl_rate;
+
+	hdmi_dsc->v_1p2 = hf_scds[11] & DRM_EDID_DSC_1P2;
+
+	if (!hdmi_dsc->v_1p2)
+		return;
+
+	hdmi_dsc->native_420 = hf_scds[11] & DRM_EDID_DSC_NATIVE_420;
+	hdmi_dsc->all_bpp = hf_scds[11] & DRM_EDID_DSC_ALL_BPP;
+
+	if (hf_scds[11] & DRM_EDID_DSC_16BPC)
+		hdmi_dsc->bpc_supported = 16;
+	else if (hf_scds[11] & DRM_EDID_DSC_12BPC)
+		hdmi_dsc->bpc_supported = 12;
+	else if (hf_scds[11] & DRM_EDID_DSC_10BPC)
+		hdmi_dsc->bpc_supported = 10;
+	else
+		/* Supports min 8 BPC if DSC 1.2 is supported*/
+		hdmi_dsc->bpc_supported = 8;
+
+	dsc_max_frl_rate = (hf_scds[12] & DRM_EDID_DSC_MAX_FRL_RATE_MASK) >> 4;
+	drm_get_max_frl_rate(dsc_max_frl_rate, &hdmi_dsc->max_lanes,
+			     &hdmi_dsc->max_frl_rate_per_lane);
+	hdmi_dsc->total_chunk_kbytes = hf_scds[13] & DRM_EDID_DSC_TOTAL_CHUNK_KBYTES;
+
+	dsc_max_slices = hf_scds[12] & DRM_EDID_DSC_MAX_SLICES;
+
+	switch (dsc_max_slices) {
+	case 1:
+		hdmi_dsc->max_slices = 1;
+		hdmi_dsc->clk_per_slice = 340;
+		break;
+	case 2:
+		hdmi_dsc->max_slices = 2;
+		hdmi_dsc->clk_per_slice = 340;
+		break;
+	case 3:
+		hdmi_dsc->max_slices = 4;
+		hdmi_dsc->clk_per_slice = 340;
+		break;
+	case 4:
+		hdmi_dsc->max_slices = 8;
+		hdmi_dsc->clk_per_slice = 340;
+		break;
+	case 5:
+		hdmi_dsc->max_slices = 8;
+		hdmi_dsc->clk_per_slice = 400;
+		break;
+	case 6:
+		hdmi_dsc->max_slices = 12;
+		hdmi_dsc->clk_per_slice = 400;
+		break;
+	case 7:
+		hdmi_dsc->max_slices = 16;
+		hdmi_dsc->clk_per_slice = 400;
+		break;
+	case 0:
+	default:
+		hdmi_dsc->max_slices = 0;
+		hdmi_dsc->clk_per_slice = 0;
+	}
+}
+
 /* Sink Capability Data Structure */
 static void drm_parse_hdmi_forum_scds(struct drm_connector *connector,
 				      const u8 *hf_scds)
@@ -5798,71 +5865,14 @@ static void drm_parse_hdmi_forum_scds(struct drm_connector *connector,
 
 	if (hf_scds[7]) {
 		u8 max_frl_rate;
-		u8 dsc_max_frl_rate;
-		u8 dsc_max_slices;
 		struct drm_hdmi_dsc_cap *hdmi_dsc = &hdmi->dsc_cap;
 
 		DRM_DEBUG_KMS("hdmi_21 sink detected. parsing edid\n");
 		max_frl_rate = (hf_scds[7] & DRM_EDID_MAX_FRL_RATE_MASK) >> 4;
 		drm_get_max_frl_rate(max_frl_rate, &hdmi->max_lanes,
 				     &hdmi->max_frl_rate_per_lane);
-		hdmi_dsc->v_1p2 = hf_scds[11] & DRM_EDID_DSC_1P2;
-
-		if (hdmi_dsc->v_1p2) {
-			hdmi_dsc->native_420 = hf_scds[11] & DRM_EDID_DSC_NATIVE_420;
-			hdmi_dsc->all_bpp = hf_scds[11] & DRM_EDID_DSC_ALL_BPP;
-
-			if (hf_scds[11] & DRM_EDID_DSC_16BPC)
-				hdmi_dsc->bpc_supported = 16;
-			else if (hf_scds[11] & DRM_EDID_DSC_12BPC)
-				hdmi_dsc->bpc_supported = 12;
-			else if (hf_scds[11] & DRM_EDID_DSC_10BPC)
-				hdmi_dsc->bpc_supported = 10;
-			else
-				/* Supports min 8 BPC if DSC 1.2 is supported*/
-				hdmi_dsc->bpc_supported = 8;
-
-			dsc_max_frl_rate = (hf_scds[12] & DRM_EDID_DSC_MAX_FRL_RATE_MASK) >> 4;
-			drm_get_max_frl_rate(dsc_max_frl_rate, &hdmi_dsc->max_lanes,
-					     &hdmi_dsc->max_frl_rate_per_lane);
-			hdmi_dsc->total_chunk_kbytes = hf_scds[13] & DRM_EDID_DSC_TOTAL_CHUNK_KBYTES;
-
-			dsc_max_slices = hf_scds[12] & DRM_EDID_DSC_MAX_SLICES;
-			switch (dsc_max_slices) {
-			case 1:
-				hdmi_dsc->max_slices = 1;
-				hdmi_dsc->clk_per_slice = 340;
-				break;
-			case 2:
-				hdmi_dsc->max_slices = 2;
-				hdmi_dsc->clk_per_slice = 340;
-				break;
-			case 3:
-				hdmi_dsc->max_slices = 4;
-				hdmi_dsc->clk_per_slice = 340;
-				break;
-			case 4:
-				hdmi_dsc->max_slices = 8;
-				hdmi_dsc->clk_per_slice = 340;
-				break;
-			case 5:
-				hdmi_dsc->max_slices = 8;
-				hdmi_dsc->clk_per_slice = 400;
-				break;
-			case 6:
-				hdmi_dsc->max_slices = 12;
-				hdmi_dsc->clk_per_slice = 400;
-				break;
-			case 7:
-				hdmi_dsc->max_slices = 16;
-				hdmi_dsc->clk_per_slice = 400;
-				break;
-			case 0:
-			default:
-				hdmi_dsc->max_slices = 0;
-				hdmi_dsc->clk_per_slice = 0;
-			}
-		}
+
+		drm_parse_dsc_info(hdmi_dsc, hf_scds);
 	}
 
 	drm_parse_ycbcr420_deep_color_info(connector, hf_scds);