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Merge tag 'arcpgu-updates-2019.07.18' of github.com:abrodkin/linux into drm-next

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This is a pretty simple improvement that allows to find encoder
as the one and only (ARC PGU doesn't support more than one) endpoint
instead of using non-standard "encoder-slave" property.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CY4PR1201MB0120FDB10A777345F9C27720A1C90@CY4PR1201MB0120.namprd12.prod.outlook.com
This commit is contained in:
Dave Airlie 2019-11-14 09:28:30 +10:00
commit 94bc7f56a8
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;