Re: [PATCH v4 1/4] drm: rockchip: introduce rk3066 hdmi

Hi,

Question for Heiko cs. See below.
Let me know if there's a need for V6?

On 3/19/19 12:44 PM, Heiko Stübner wrote:

Am Mittwoch, 6. März 2019, 23:41:10 CET schrieb Johan Jonker:

quoted

+static int rk3066_hdmi_connector_get_modes(struct drm_connector *connector)
+{
+	struct rk3066_hdmi *hdmi = to_rk3066_hdmi(connector);
+	struct edid *edid;
+	int ret = 0;
+

Is this OK or drop it?
	hdmi->hdmi_data.sink_is_hdmi = false;

quoted

+	if (!hdmi->ddc)
+		return 0;
+
+	edid = drm_get_edid(connector, hdmi->ddc);
+	if (edid) {
+		hdmi->hdmi_data.sink_is_hdmi = drm_detect_hdmi_monitor(edid);
+		drm_connector_update_edid_property(connector, edid);
+		ret = drm_add_edid_modes(connector, edid);
+		kfree(edid);
+	}
+

quoted

+
+	return ret;
+}

quoted

+static int rk3066_hdmi_bind(struct device *dev, struct device *master,
+			    void *data)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct drm_device *drm = data;
+	struct rk3066_hdmi *hdmi;
+	struct resource *iores;
+	int irq;
+	int ret;
+
+	hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
+	if (!hdmi)
+		return -ENOMEM;
+
+	hdmi->dev = dev;
+	hdmi->drm_dev = drm;
+
+	iores = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!iores)
+		return -ENXIO;
+
+	hdmi->regs = devm_ioremap_resource(dev, iores);
+	if (IS_ERR(hdmi->regs))
+		return PTR_ERR(hdmi->regs);
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	hdmi->hclk = devm_clk_get(dev, "hclk");
+	if (IS_ERR(hdmi->hclk)) {
+		dev_err(dev, "unable to get HDMI hclk clock\n");
+		return PTR_ERR(hdmi->hclk);
+	}
+
+	ret = clk_prepare_enable(hdmi->hclk);
+	if (ret) {
+		dev_err(dev, "cannot enable HDMI hclk clock: %d\n", ret);
+		return ret;
+	}
+
+	hdmi->grf = syscon_regmap_lookup_by_phandle(dev->of_node,
+						    "rockchip,grf");
+	if (IS_ERR(hdmi->grf)) {
+		dev_err(dev, "unable to get rockchip,grf\n");
+		ret = PTR_ERR(hdmi->grf);
+		goto err_disable_hclk;
+	}
+
+	/* internal hclk = hdmi_hclk / 25 */
+	hdmi_writeb(hdmi, HDMI_INTERNAL_CLK_DIVIDER, 25);
+
+	hdmi->ddc = rk3066_hdmi_i2c_adapter(hdmi);
+	if (IS_ERR(hdmi->ddc)) {
+		ret = PTR_ERR(hdmi->ddc);
+		hdmi->ddc = NULL;
+		goto err_disable_hclk;
+	}
+
+	rk3066_hdmi_set_power_mode(hdmi, HDMI_SYS_POWER_MODE_B);
+	usleep_range(999, 1000);
+	hdmi_writeb(hdmi, HDMI_INTR_MASK1, HDMI_INTR_HOTPLUG);
+	hdmi_writeb(hdmi, HDMI_INTR_MASK2, 0);
+	hdmi_writeb(hdmi, HDMI_INTR_MASK3, 0);
+	hdmi_writeb(hdmi, HDMI_INTR_MASK4, 0);
+	rk3066_hdmi_set_power_mode(hdmi, HDMI_SYS_POWER_MODE_A);
+

The function rk3066_hdmi_register() inits an encoder and connector.

quoted

+	ret = rk3066_hdmi_register(drm, hdmi);
+	if (ret)
+		goto err_disable_hclk;

goto err_disable_i2c;

So that the i2c-adapter also gets disabled on error.

quoted

+	dev_set_drvdata(dev, hdmi);
+
+	ret = devm_request_threaded_irq(dev, irq, rk3066_hdmi_hardirq,
+					rk3066_hdmi_irq, IRQF_SHARED,
+					dev_name(dev), hdmi);
+	if (ret) {
+		dev_err(dev, "failed to request hdmi irq: %d\n", ret);
+		goto err_disable_hclk;

If an error happens here the encoder and connector also have to be
removed like in the inno driver. Is that correct?
Change this to:

goto err_cleanup_hdmi;

goto err_disable_i2c;

quoted

+	}
+
+	return 0;
+

What goto name would you like to have here?

err_cleanup_hdmi:
	hdmi->connector.funcs->destroy(&hdmi->connector);
	hdmi->encoder.funcs->destroy(&hdmi->encoder);

err_disable_i2c:
	i2c_put_adapter(hdmi->ddc);

quoted

+err_disable_hclk:
+	clk_disable_unprepare(hdmi->hclk);
+
+	return ret;
+}
+

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