diff mbox series

[v6,2/4] drm/msm/dp: parser data-lanes as property of dp_out endpoint

Message ID 1669852310-22360-3-git-send-email-quic_khsieh@quicinc.com (mailing list archive)
State Superseded
Headers show
Series Add data-lanes and link-frequencies to dp_out endpoint | expand

Commit Message

Kuogee Hsieh Nov. 30, 2022, 11:51 p.m. UTC
Add capability to parser data-lanes as property of dp_out endpoint.
Also retain the original capability to parser data-lanes as property
of mdss_dp node to handle legacy case.

Changes in v6:
-- first patch after split parser patch into two

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_parser.c | 30 +++++++++++++++++++++++-------
 1 file changed, 23 insertions(+), 7 deletions(-)

Comments

Dmitry Baryshkov Nov. 30, 2022, 11:58 p.m. UTC | #1
On 01/12/2022 01:51, Kuogee Hsieh wrote:
> Add capability to parser data-lanes as property of dp_out endpoint.
> Also retain the original capability to parser data-lanes as property
> of mdss_dp node to handle legacy case.
> 
> Changes in v6:
> -- first patch after split parser patch into two
> 
> Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
> ---
>   drivers/gpu/drm/msm/dp/dp_parser.c | 30 +++++++++++++++++++++++-------
>   1 file changed, 23 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
> index dd73221..b06ff60 100644
> --- a/drivers/gpu/drm/msm/dp/dp_parser.c
> +++ b/drivers/gpu/drm/msm/dp/dp_parser.c
> @@ -94,16 +94,32 @@ static int dp_parser_ctrl_res(struct dp_parser *parser)
>   static int dp_parser_misc(struct dp_parser *parser)
>   {
>   	struct device_node *of_node = parser->pdev->dev.of_node;
> -	int len;
> +	struct device_node *endpoint;
> +	int cnt;
> +
> +	/*
> +	 * legacy code, data-lanes is the property of mdss_dp node
> +	 */
> +	cnt = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES);
> +	if (cnt > 0) {
> +		parser->max_dp_lanes = cnt;
> +		return 0;
> +	}
>   
> -	len = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES);
> -	if (len < 0) {
> -		DRM_WARN("Invalid property \"data-lanes\", default max DP lanes = %d\n",
> -			 DP_MAX_NUM_DP_LANES);
> -		len = DP_MAX_NUM_DP_LANES;
> +	/*
> +	 * data-lanes is the property of dp_out endpoint
> +	 */
> +	endpoint = of_graph_get_endpoint_by_regs(of_node, 1, 0); /* port@1 */
> +	if (endpoint) {
> +		cnt = of_property_count_u32_elems(endpoint, "data-lanes");

drm_of_get_data_lanes_count(), or better drm_of_get_data_lanes_count_ep().

Also please check new property first, then check the legacy one.

So it would be:

cnt = drm_of_get_data_lanes_count_ep();
if (cnt < 0)
     cnt = drm_of_get_data_lanes_count();
if (cnt < 0) {
     DRM_WARN(...);
     cnt = DP_MAX_NUM_DP_LANES;
}


> +		if (cnt < 0)
> +			parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */
> +		else
> +			parser->max_dp_lanes = cnt;
> +	} else {
> +		parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */
>   	}
>   
> -	parser->max_dp_lanes = len;
>   	return 0;
>   }
>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c b/drivers/gpu/drm/msm/dp/dp_parser.c
index dd73221..b06ff60 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.c
+++ b/drivers/gpu/drm/msm/dp/dp_parser.c
@@ -94,16 +94,32 @@  static int dp_parser_ctrl_res(struct dp_parser *parser)
 static int dp_parser_misc(struct dp_parser *parser)
 {
 	struct device_node *of_node = parser->pdev->dev.of_node;
-	int len;
+	struct device_node *endpoint;
+	int cnt;
+
+	/*
+	 * legacy code, data-lanes is the property of mdss_dp node
+	 */
+	cnt = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES);
+	if (cnt > 0) {
+		parser->max_dp_lanes = cnt;
+		return 0;
+	}
 
-	len = drm_of_get_data_lanes_count(of_node, 1, DP_MAX_NUM_DP_LANES);
-	if (len < 0) {
-		DRM_WARN("Invalid property \"data-lanes\", default max DP lanes = %d\n",
-			 DP_MAX_NUM_DP_LANES);
-		len = DP_MAX_NUM_DP_LANES;
+	/*
+	 * data-lanes is the property of dp_out endpoint
+	 */
+	endpoint = of_graph_get_endpoint_by_regs(of_node, 1, 0); /* port@1 */
+	if (endpoint) {
+		cnt = of_property_count_u32_elems(endpoint, "data-lanes");
+		if (cnt < 0)
+			parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */
+		else
+			parser->max_dp_lanes = cnt;
+	} else {
+		parser->max_dp_lanes = DP_MAX_NUM_DP_LANES; /* 4 lanes */
 	}
 
-	parser->max_dp_lanes = len;
 	return 0;
 }