drm/msm/dp: Allow specifying connector_type per controller

As the following patches introduced support for multiple DP blocks in a
platform and some of those block might be eDP it becomes useful to be
able to specify the connector type per block.

Although there's only a single block at this point, the array of descs
and the search in dp_display_get_desc() are introduced here to simplify
the next patch, that does introduce support for multiple DP blocks.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Link: https://lore.kernel.org/r/20211016221843.2167329-4-bjorn.andersson@linaro.org
Signed-off-by: Rob Clark <robdclark@chromium.org>

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

@@ -115,8 +115,25 @@ struct dp_display_private {
 	struct dp_audio *audio;
 };
 
+struct msm_dp_desc {
+	phys_addr_t io_start;
+	unsigned int connector_type;
+};
+
+struct msm_dp_config {
+	const struct msm_dp_desc *descs;
+	size_t num_descs;
+};
+
+static const struct msm_dp_config sc7180_dp_cfg = {
+	.descs = (const struct msm_dp_desc[]) {
+		{ .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
+	},
+	.num_descs = 1,
+};
+
 static const struct of_device_id dp_dt_match[] = {
-	{.compatible = "qcom,sc7180-dp"},
+	{ .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_cfg },
 	{}
 };
 
@@ -1180,10 +1197,29 @@ int dp_display_request_irq(struct msm_dp *dp_display)
 	return 0;
 }
 
+static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pdev)
+{
+	const struct msm_dp_config *cfg = of_device_get_match_data(&pdev->dev);
+	struct resource *res;
+	int i;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return NULL;
+
+	for (i = 0; i < cfg->num_descs; i++)
+		if (cfg->descs[i].io_start == res->start)
+			return &cfg->descs[i];
+
+	dev_err(&pdev->dev, "unknown displayport instance\n");
+	return NULL;
+}
+
 static int dp_display_probe(struct platform_device *pdev)
 {
 	int rc = 0;
 	struct dp_display_private *dp;
+	const struct msm_dp_desc *desc;
 
 	if (!pdev || !pdev->dev.of_node) {
 		DRM_ERROR("pdev not found\n");
@@ -1194,8 +1230,13 @@ static int dp_display_probe(struct platform_device *pdev)
 	if (!dp)
 		return -ENOMEM;
 
+	desc = dp_display_get_desc(pdev);
+	if (!desc)
+		return -EINVAL;
+
 	dp->pdev = pdev;
 	dp->name = "drm_dp";
+	dp->dp_display.connector_type = desc->connector_type;
 
 	rc = dp_init_sub_modules(dp);
 	if (rc) {

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

@@ -18,6 +18,7 @@ struct msm_dp {
 	bool is_connected;
 	bool audio_enabled;
 	bool power_on;
+	unsigned int connector_type;
 
 	hdmi_codec_plugged_cb plugged_cb;
 

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

@@ -147,7 +147,7 @@ struct drm_connector *dp_drm_connector_init(struct msm_dp *dp_display)
 
 	ret = drm_connector_init(dp_display->drm_dev, connector,
 			&dp_connector_funcs,
-			DRM_MODE_CONNECTOR_DisplayPort);
+			dp_display->connector_type);
 	if (ret)
 		return ERR_PTR(ret);