[PATCH v6 25/42] drm/mediatek: mtk_hdmi: Move CEC device parsing in new function

AngeloGioacchino Del Regno
2025-02-11T11:34:59Z

Move the CEC device parsing logic to a new function called
mtk_hdmi_get_cec_dev(), and move the parsing action to the end
of mtk_hdmi_dt_parse_pdata(), allowing to remove gotos in this
function, reducing code size and improving readability.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
drivers/gpu/drm/mediatek/mtk_hdmi.c | 82 ++++++++++++++---------------
1 file changed, 39 insertions(+), 43 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
index 6140b55c2830..03b56588fc7d 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
@@ -1367,20 +1367,12 @@ static const struct drm_bridge_funcs mtk_hdmi_bridge_funcs = {
.edid_read = mtk_hdmi_bridge_edid_read,
};

-static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
- struct platform_device *pdev)
+static int mtk_hdmi_get_cec_dev(struct mtk_hdmi *hdmi, struct device *dev, struct device_node *np)
{
- struct device *dev = &pdev->dev;
- struct device_node *np = dev->of_node;
- struct device_node *remote, *i2c_np;
struct platform_device *cec_pdev;
- struct regmap *regmap;
+ struct device_node *cec_np;
int ret;

- ret = mtk_hdmi_get_all_clk(hdmi, np);
- if (ret)
- return dev_err_probe(dev, ret, "Failed to get clocks\n");
-
/* The CEC module handles HDMI hotplug detection */
cec_np = of_get_compatible_child(np->parent, "mediatek,mt8173-cec");
if (!cec_np)
@@ -1394,65 +1386,69 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
return -EPROBE_DEFER;
}
of_node_put(cec_np);
- hdmi->cec_dev = &cec_pdev->dev;

/*
* The mediatek,syscon-hdmi property contains a phandle link to the
* MMSYS_CONFIG device and the register offset of the HDMI_SYS_CFG
* registers it contains.
*/
- regmap = syscon_regmap_lookup_by_phandle(np, "mediatek,syscon-hdmi");
- ret = of_property_read_u32_index(np, "mediatek,syscon-hdmi", 1,
- &hdmi->sys_offset);
- if (IS_ERR(regmap))
- ret = PTR_ERR(regmap);
- if (ret) {
- dev_err_probe(dev, ret,
- "Failed to get system configuration registers\n");
- goto put_device;
- }
- hdmi->sys_regmap = regmap;
+ hdmi->sys_regmap = syscon_regmap_lookup_by_phandle(np, "mediatek,syscon-hdmi");
+ if (IS_ERR(hdmi->sys_regmap))
+ return PTR_ERR(hdmi->sys_regmap);
+
+ ret = of_property_read_u32_index(np, "mediatek,syscon-hdmi", 1, &hdmi->sys_offset);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Failed to get system configuration registers\n");
+
+ hdmi->cec_dev = &cec_pdev->dev;
+ return 0;
+}
+
+static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
+ struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node;
+ struct device_node *remote, *i2c_np;
+ int ret;
+
+ ret = mtk_hdmi_get_all_clk(hdmi, np);
+ if (ret)
+ return dev_err_probe(dev, ret, "Failed to get clocks\n");

hdmi->regs = device_node_to_regmap(dev->of_node);
- if (IS_ERR(hdmi->regs)) {
- ret = PTR_ERR(hdmi->regs);
- goto put_device;
- }
+ if (IS_ERR(hdmi->regs))
+ return PTR_ERR(hdmi->regs);

remote = of_graph_get_remote_node(np, 1, 0);
- if (!remote) {
- ret = -EINVAL;
- goto put_device;
- }
+ if (!remote)
+ return -EINVAL;

if (!of_device_is_compatible(remote, "hdmi-connector")) {
hdmi->next_bridge = of_drm_find_bridge(remote);
if (!hdmi->next_bridge) {
dev_err(dev, "Waiting for external bridge\n");
of_node_put(remote);
- ret = -EPROBE_DEFER;
- goto put_device;
+ return -EPROBE_DEFER;
}
}

i2c_np = of_parse_phandle(remote, "ddc-i2c-bus", 0);
of_node_put(remote);
- if (!i2c_np) {
- ret = dev_err_probe(dev, -EINVAL, "No ddc-i2c-bus in connector\n");
- goto put_device;
- }
+ if (!i2c_np)
+ return dev_err_probe(dev, -EINVAL, "No ddc-i2c-bus in connector\n");

hdmi->ddc_adpt = of_find_i2c_adapter_by_node(i2c_np);
of_node_put(i2c_np);
- if (!hdmi->ddc_adpt) {
- ret = dev_err_probe(dev, -EINVAL, "Failed to get ddc i2c adapter by node\n");
- goto put_device;
- }
+ if (!hdmi->ddc_adpt)
+ return dev_err_probe(dev, -EINVAL, "Failed to get ddc i2c adapter by node\n");
+
+ ret = mtk_hdmi_get_cec_dev(hdmi, dev, np);
+ if (ret)
+ return ret;

return 0;
-put_device:
- put_device(hdmi->cec_dev);
- return ret;
}

/*
--
2.48.1