drm/msm/dp: parse DT from dp_parser_get

It makes little sense to split the submodule get and actual DT parsing.
Call dp_parser_parse() directly from dp_parser_get(), so that the parser
data is fully initialised once it is returned to the caller.
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Tested-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/576101/
Link: https://lore.kernel.org/r/20240126-dp-power-parser-cleanup-v3-3-098d5f581dd3@linaro.org

drivers/gpu/drm/msm/dp/dp_display.c

@@ -1267,12 +1267,6 @@ static int dp_display_probe(struct platform_device *pdev)
 		return -EPROBE_DEFER;
 	}
 
-	rc = dp->parser->parse(dp->parser);
-	if (rc) {
-		DRM_ERROR("device tree parsing failed\n");
-		goto err;
-	}
-
 	rc = dp_power_client_init(dp->power);
 	if (rc) {
 		DRM_ERROR("Power client create failed\n");

drivers/gpu/drm/msm/dp/dp_parser.c

@@ -315,13 +315,19 @@ static int dp_parser_parse(struct dp_parser *parser)
 struct dp_parser *dp_parser_get(struct platform_device *pdev)
 {
 	struct dp_parser *parser;
+	int ret;
 
 	parser = devm_kzalloc(&pdev->dev, sizeof(*parser), GFP_KERNEL);
 	if (!parser)
 		return ERR_PTR(-ENOMEM);
 
-	parser->parse = dp_parser_parse;
 	parser->pdev = pdev;
 
+	ret = dp_parser_parse(parser);
+	if (ret) {
+		dev_err(&pdev->dev, "device tree parsing failed\n");
+		return ERR_PTR(ret);
+	}
+
 	return parser;
 }

drivers/gpu/drm/msm/dp/dp_parser.h

@@ -67,7 +67,6 @@ struct dss_module_power {
  *
  * @pdev: platform data of the client
  * @mp: gpio, regulator and clock related data
- * @parse: function to be called by client to parse device tree.
  */
 struct dp_parser {
 	struct platform_device *pdev;
@@ -76,8 +75,6 @@ struct dp_parser {
 	u32 max_dp_lanes;
 	u32 max_dp_link_rate;
 	struct drm_bridge *next_bridge;
-
-	int (*parse)(struct dp_parser *parser);
 };
 
 /**