rk3568 rt uboot init

hc

2023-11-06 9df731a176aab8e03b984b681b1bea01ccff6644

 u-boot/drivers/video/drm/dw-dp.c
..
..
@@ -231,6 +231,7 @@
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231
 
232
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 	bool force_hpd;
233
233
 	bool force_output;
234
+	u32 max_link_rate;
234
235
 };
235
236
 
236
237
 enum {
..
..
@@ -562,7 +563,7 @@
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 		!!(dpcd & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED);
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 	link->revision = link->dpcd[DP_DPCD_REV];
565
-	link->rate = min_t(u32, dp->phy.attrs.max_link_rate * 100,
566
+	link->rate = min_t(u32, min(dp->max_link_rate, dp->phy.attrs.max_link_rate * 100),
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 			   drm_dp_max_link_rate(link->dpcd));
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 	link->lanes = min_t(u8, dp->phy.attrs.bus_width,
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569
 			    drm_dp_max_lane_count(link->dpcd));
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..
@@ -1704,6 +1705,49 @@
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1705
 	return 0;
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1706
 }
1706
1707
 
1708
+static u32 dw_dp_parse_link_frequencies(struct dw_dp *dp)
1709
+{
1710
+	struct udevice *dev = dp->dev;
1711
+	const struct device_node *endpoint;
1712
+	u64 frequency = 0;
1713
+
1714
+	endpoint = rockchip_of_graph_get_endpoint_by_regs(dev->node, 1, 0);
1715
+	if (!endpoint)
1716
+		return 0;
1717
+
1718
+	if (of_property_read_u64(endpoint, "link-frequencies", &frequency) < 0)
1719
+		return 0;
1720
+
1721
+	if (!frequency)
1722
+		return 0;
1723
+
1724
+	do_div(frequency, 10 * 1000);	/* symbol rate kbytes */
1725
+
1726
+	switch (frequency) {
1727
+	case 162000:
1728
+	case 270000:
1729
+	case 540000:
1730
+	case 810000:
1731
+		break;
1732
+	default:
1733
+		dev_err(dev, "invalid link frequency value: %llu\n", frequency);
1734
+		return 0;
1735
+	}
1736
+
1737
+	return frequency;
1738
+}
1739
+
1740
+static int dw_dp_parse_dt(struct dw_dp *dp)
1741
+{
1742
+	dp->force_hpd = dev_read_bool(dp->dev, "force-hpd");
1743
+
1744
+	dp->max_link_rate = dw_dp_parse_link_frequencies(dp);
1745
+	if (!dp->max_link_rate)
1746
+		dp->max_link_rate = 810000;
1747
+
1748
+	return 0;
1749
+}
1750
+
1707
1751
 static int dw_dp_probe(struct udevice *dev)
1708
1752
 {
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1753
 	struct dw_dp *dp = dev_get_priv(dev);
..
..
@@ -1723,8 +1767,6 @@
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1767
 		return ret;
1724
1768
 	}
1725
1769
 
1726
-	dp->force_hpd = dev_read_bool(dev, "force-hpd");
1727
-
1728
1770
 	ret = gpio_request_by_name(dev, "hpd-gpios", 0, &dp->hpd_gpio,
1729
1771
 				   GPIOD_IS_IN);
1730
1772
 	if (ret && ret != -ENOENT) {
..
..
@@ -1736,6 +1778,12 @@
1736
1778
 
1737
1779
 	dp->dev = dev;
1738
1780
 
1781
+	ret = dw_dp_parse_dt(dp);
1782
+	if (ret) {
1783
+		dev_err(dev, "failed to parse DT\n");
1784
+		return ret;
1785
+	}
1786
+
1739
1787
 	dw_dp_ddc_init(dp);
1740
1788
 
1741
1789
 	rockchip_connector_bind(&dp->connector, dev, dp->id, &dw_dp_connector_funcs, NULL,