drm/msm/hdmi: switch to clk_bulk API

The last platform using legacy clock names for HDMI block (APQ8064)
switched to new clock names in 5.16. It's time to stop caring about old
DT, drop hand-coded helpers and switch to clk_bulk_* API.

Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/651716/
Link: https://lore.kernel.org/r/20250505-fd-hdmi-hpd-v5-6-48541f76318c@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

Author: lumag

drivers/gpu/drm/msm/hdmi/hdmi.c

@@ -353,17 +353,12 @@ static int msm_hdmi_dev_probe(struct platform_device *pdev)
 	if (!hdmi->hpd_clks)
 		return -ENOMEM;
 
-	for (i = 0; i < config->hpd_clk_cnt; i++) {
-		struct clk *clk;
+	for (i = 0; i < config->hpd_clk_cnt; i++)
+		hdmi->hpd_clks[i].id = config->hpd_clk_names[i];
 
-		clk = msm_clk_get(pdev, config->hpd_clk_names[i]);
-		if (IS_ERR(clk))
-			return dev_err_probe(dev, PTR_ERR(clk),
-					     "failed to get hpd clk: %s\n",
-					     config->hpd_clk_names[i]);
-
-		hdmi->hpd_clks[i] = clk;
-	}
+	ret = devm_clk_bulk_get(&pdev->dev, config->hpd_clk_cnt, hdmi->hpd_clks);
+	if (ret)
+		return ret;
 
 	hdmi->extp_clk = devm_clk_get_optional(&pdev->dev, "extp");
 	if (IS_ERR(hdmi->extp_clk))

drivers/gpu/drm/msm/hdmi/hdmi.h

@@ -49,7 +49,7 @@ struct hdmi {
 
 	struct regulator_bulk_data *hpd_regs;
 	struct regulator_bulk_data *pwr_regs;
-	struct clk **hpd_clks;
+	struct clk_bulk_data *hpd_clks;
 	struct clk *extp_clk;
 
 	struct gpio_desc *hpd_gpiod;

drivers/gpu/drm/msm/hdmi/hdmi_hpd.c

@@ -60,27 +60,6 @@ static void msm_hdmi_phy_reset(struct hdmi *hdmi)
 	}
 }
 
-static void enable_hpd_clocks(struct hdmi *hdmi, bool enable)
-{
-	const struct hdmi_platform_config *config = hdmi->config;
-	struct device *dev = &hdmi->pdev->dev;
-	int i, ret;
-
-	if (enable) {
-		for (i = 0; i < config->hpd_clk_cnt; i++) {
-			ret = clk_prepare_enable(hdmi->hpd_clks[i]);
-			if (ret) {
-				DRM_DEV_ERROR(dev,
-					"failed to enable hpd clk: %s (%d)\n",
-					config->hpd_clk_names[i], ret);
-			}
-		}
-	} else {
-		for (i = config->hpd_clk_cnt - 1; i >= 0; i--)
-			clk_disable_unprepare(hdmi->hpd_clks[i]);
-	}
-}
-
 int msm_hdmi_hpd_enable(struct drm_bridge *bridge)
 {
 	struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
@@ -107,7 +86,9 @@ int msm_hdmi_hpd_enable(struct drm_bridge *bridge)
 		gpiod_set_value_cansleep(hdmi->hpd_gpiod, 1);
 
 	pm_runtime_get_sync(dev);
-	enable_hpd_clocks(hdmi, true);
+	ret = clk_bulk_prepare_enable(config->hpd_clk_cnt, hdmi->hpd_clks);
+	if (ret)
+		goto fail;
 
 	msm_hdmi_set_mode(hdmi, false);
 	msm_hdmi_phy_reset(hdmi);
@@ -149,7 +130,7 @@ void msm_hdmi_hpd_disable(struct hdmi *hdmi)
 
 	msm_hdmi_set_mode(hdmi, false);
 
-	enable_hpd_clocks(hdmi, false);
+	clk_bulk_disable_unprepare(config->hpd_clk_cnt, hdmi->hpd_clks);
 	pm_runtime_put(dev);
 
 	ret = pinctrl_pm_select_sleep_state(dev);
@@ -193,14 +174,20 @@ void msm_hdmi_hpd_irq(struct drm_bridge *bridge)
 
 static enum drm_connector_status detect_reg(struct hdmi *hdmi)
 {
-	uint32_t hpd_int_status;
+	const struct hdmi_platform_config *config = hdmi->config;
+	u32 hpd_int_status = 0;
+	int ret;
 
 	pm_runtime_get_sync(&hdmi->pdev->dev);
-	enable_hpd_clocks(hdmi, true);
+	ret = clk_bulk_prepare_enable(config->hpd_clk_cnt, hdmi->hpd_clks);
+	if (ret)
+		goto out;
 
 	hpd_int_status = hdmi_read(hdmi, REG_HDMI_HPD_INT_STATUS);
 
-	enable_hpd_clocks(hdmi, false);
+	clk_bulk_disable_unprepare(config->hpd_clk_cnt, hdmi->hpd_clks);
+
+out:
 	pm_runtime_put(&hdmi->pdev->dev);
 
 	return (hpd_int_status & HDMI_HPD_INT_STATUS_CABLE_DETECTED) ?