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Code Issues Releases Wiki Activity

drm/arcpgu: rework encoder search

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Instead of using non-standard "encoder-slave" property to find
encoder let's find it by associated endpoint.

While I'm on it add corresponding log message if we don't find
any encoder and we assume that we use virtual LCD on the
simulation platform.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
This commit is contained in:
Eugeniy Paltsev 2019-06-11 20:21:59 +03:00 committed by Alexey Brodkin
parent 7aaddd96d5
commit cee17a7165
1 changed files with 13 additions and 3 deletions
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16
drivers/gpu/drm/arc/arcpgu_drv.c
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@ -14,6 +14,7 @@
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_of.h>
#include <drm/drm_probe_helper.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
@ -45,7 +46,7 @@ static int arcpgu_load(struct drm_device *drm)
{
struct platform_device *pdev = to_platform_device(drm->dev);
struct arcpgu_drm_private *arcpgu;
struct device_node *encoder_node;
struct device_node *encoder_node = NULL, *endpoint_node = NULL;
struct resource *res;
int ret;
@ -80,14 +81,23 @@ static int arcpgu_load(struct drm_device *drm)
if (arc_pgu_setup_crtc(drm) < 0)
return -ENODEV;
/* find the encoder node and initialize it */
encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
/*
* There is only one output port inside each device. It is linked with
* encoder endpoint.
*/
endpoint_node = of_graph_get_next_endpoint(pdev->dev.of_node, NULL);
if (endpoint_node) {
encoder_node = of_graph_get_remote_port_parent(endpoint_node);
of_node_put(endpoint_node);
}
if (encoder_node) {
ret = arcpgu_drm_hdmi_init(drm, encoder_node);
of_node_put(encoder_node);
if (ret < 0)
return ret;
} else {
dev_info(drm->dev, "no encoder found. Assumed virtual LCD on simulation platform\n");
ret = arcpgu_drm_sim_init(drm, NULL);
if (ret < 0)
return ret;