drm/mediatek: mtk_hdmi: Add HDMI IP version configuration to pdata

In preparation for adding a driver for the HDMIv2 IP and before
moving the common bits out of this driver, add a new structure
`mtk_hdmi_ver_conf`, holding pointers to HDMI IP version specific
drm_bridge_funcs, hdmi_codec_ops and clock array used for probe,
and nest it into the mtk_hdmi_conf platform data structure.

While at it, also convert all of the direct users of
mtk_hdmi_bridge_funcs, mtk_hdmi_audio_codec_ops, mtk_hdmi_clk_names
to use pointers from the ver_conf platform data.

In order to do so, it was also necessary to fill a new version 1
specific const `mtk_hdmi_v1_ver_conf` and assign it to all of the
currently supported compatibles for this driver.

This commit brings no functional change.

Reviewed-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@collabora.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20251023-mediatek-drm-hdmi-v2-v11-3-7873ec4a1edf@collabora.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

Author: AngeloGioacchino Del Regno

drivers/gpu/drm/mediatek/mtk_hdmi.c

@@ -144,7 +144,15 @@ struct hdmi_audio_param {
 	struct hdmi_codec_params codec_params;
 };
 
+struct mtk_hdmi_ver_conf {
+	const struct drm_bridge_funcs *bridge_funcs;
+	const struct hdmi_codec_ops *codec_ops;
+	const char * const *mtk_hdmi_clock_names;
+	int num_clocks;
+};
+
 struct mtk_hdmi_conf {
+	const struct mtk_hdmi_ver_conf *ver_conf;
 	bool tz_disabled;
 	bool cea_modes_only;
 	unsigned long max_mode_clock;
@@ -1618,7 +1626,7 @@ static int mtk_hdmi_register_audio_driver(struct device *dev)
 	struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
 	struct hdmi_audio_param *aud_param = &hdmi->aud_param;
 	struct hdmi_codec_pdata codec_data = {
-		.ops = &mtk_hdmi_audio_codec_ops,
+		.ops = hdmi->conf->ver_conf->codec_ops,
 		.max_i2s_channels = 2,
 		.i2s = 1,
 		.data = hdmi,
@@ -1651,24 +1659,32 @@ static int mtk_hdmi_register_audio_driver(struct device *dev)
 
 static int mtk_hdmi_probe(struct platform_device *pdev)
 {
+	const struct mtk_hdmi_ver_conf *ver_conf;
+	const struct mtk_hdmi_conf *hdmi_conf;
 	struct mtk_hdmi *hdmi;
 	struct device *dev = &pdev->dev;
-	const int num_clocks = MTK_HDMI_CLK_COUNT;
 	int ret;
 
+	hdmi_conf = of_device_get_match_data(dev);
+	if (!hdmi_conf)
+		return -ENODEV;
+
+	ver_conf = hdmi_conf->ver_conf;
+
 	hdmi = devm_drm_bridge_alloc(dev, struct mtk_hdmi, bridge,
-				     &mtk_hdmi_bridge_funcs);
+				     ver_conf->bridge_funcs);
 	if (IS_ERR(hdmi))
 		return PTR_ERR(hdmi);
 
 	hdmi->dev = dev;
-	hdmi->conf = of_device_get_match_data(dev);
+	hdmi->conf = hdmi_conf;
 
-	hdmi->clk = devm_kcalloc(dev, num_clocks, sizeof(*hdmi->clk), GFP_KERNEL);
+	hdmi->clk = devm_kcalloc(dev, ver_conf->num_clocks, sizeof(*hdmi->clk), GFP_KERNEL);
 	if (!hdmi->clk)
 		return -ENOMEM;
 
-	ret = mtk_hdmi_dt_parse_pdata(hdmi, pdev, mtk_hdmi_clk_names, num_clocks);
+	ret = mtk_hdmi_dt_parse_pdata(hdmi, pdev, ver_conf->mtk_hdmi_clock_names,
+				      ver_conf->num_clocks);
 	if (ret)
 		return ret;
 
@@ -1729,19 +1745,32 @@ static __maybe_unused int mtk_hdmi_resume(struct device *dev)
 
 static SIMPLE_DEV_PM_OPS(mtk_hdmi_pm_ops, mtk_hdmi_suspend, mtk_hdmi_resume);
 
+static const struct mtk_hdmi_ver_conf mtk_hdmi_v1_ver_conf = {
+	.bridge_funcs = &mtk_hdmi_bridge_funcs,
+	.codec_ops = &mtk_hdmi_audio_codec_ops,
+	.mtk_hdmi_clock_names = mtk_hdmi_clk_names,
+	.num_clocks = ARRAY_SIZE(mtk_hdmi_clk_names)
+};
+
 static const struct mtk_hdmi_conf mtk_hdmi_conf_mt2701 = {
 	.tz_disabled = true,
+	.ver_conf = &mtk_hdmi_v1_ver_conf
 };
 
 static const struct mtk_hdmi_conf mtk_hdmi_conf_mt8167 = {
-	.max_mode_clock = 148500,
 	.cea_modes_only = true,
+	.max_mode_clock = 148500,
+	.ver_conf = &mtk_hdmi_v1_ver_conf
+};
+
+static const struct mtk_hdmi_conf mtk_hdmi_conf_mt8173 = {
+	.ver_conf = &mtk_hdmi_v1_ver_conf
 };
 
 static const struct of_device_id mtk_hdmi_of_ids[] = {
 	{ .compatible = "mediatek,mt2701-hdmi", .data = &mtk_hdmi_conf_mt2701 },
 	{ .compatible = "mediatek,mt8167-hdmi", .data = &mtk_hdmi_conf_mt8167 },
-	{ .compatible = "mediatek,mt8173-hdmi" },
+	{ .compatible = "mediatek,mt8173-hdmi", .data = &mtk_hdmi_conf_mt8173 },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, mtk_hdmi_of_ids);