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drm/mediatek: convert dpi driver to use drm_of_find_panel_or_bridge

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Convert dpi driver to use drm_of_find_panel_or_bridge.
This changes some error messages to debug messages (in the graph core).
Graph connections are often "no connects" depending on the particular
board, so we want to avoid spurious messages. Plus the kernel is not a
DT validator.
related links:
[1] https://lkml.org/lkml/2017/2/3/716
[2] https://lkml.org/lkml/2017/2/3/719

Signed-off-by: chunhui dai <chunhui.dai@mediatek.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>
This commit is contained in:
chunhui dai 2018-10-03 11:41:45 +08:00 committed by CK Hu
parent 55c78aa5c8
commit bcc97daee6
1 changed files with 6 additions and 10 deletions
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16
drivers/gpu/drm/mediatek/mtk_dpi.c
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@ -14,6 +14,7 @@
#include <drm/drmP.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_of.h>
#include <linux/kernel.h>
#include <linux/component.h>
#include <linux/platform_device.h>
@ -668,7 +669,6 @@ static int mtk_dpi_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct mtk_dpi *dpi;
struct resource *mem;
struct device_node *bridge_node;
int comp_id;
int ret;
@ -714,16 +714,12 @@ static int mtk_dpi_probe(struct platform_device *pdev)
return -EINVAL;
}
bridge_node = of_graph_get_remote_node(dev->of_node, 0, 0);
if (!bridge_node)
return -ENODEV;
ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
NULL, &dpi->bridge);
if (ret)
return ret;
dev_info(dev, "Found bridge node: %pOF\n", bridge_node);
dpi->bridge = of_drm_find_bridge(bridge_node);
of_node_put(bridge_node);
if (!dpi->bridge)
return -EPROBE_DEFER;
dev_info(dev, "Found bridge node: %pOF\n", dpi->bridge->of_node);
comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DPI);
if (comp_id < 0) {