From ee930fffee469d076998274a2ca55e13dc1efb67 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 08:50:54 +0000
Subject: [PATCH] enable tun/tap/iptables
---
u-boot/drivers/video/drm/dw-dp.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++---
1 files changed, 51 insertions(+), 3 deletions(-)
diff --git a/u-boot/drivers/video/drm/dw-dp.c b/u-boot/drivers/video/drm/dw-dp.c
index e6e5b0b..2af2f82 100644
--- a/u-boot/drivers/video/drm/dw-dp.c
+++ b/u-boot/drivers/video/drm/dw-dp.c
@@ -231,6 +231,7 @@
bool force_hpd;
bool force_output;
+ u32 max_link_rate;
};
enum {
@@ -562,7 +563,7 @@
!!(dpcd & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED);
link->revision = link->dpcd[DP_DPCD_REV];
- link->rate = min_t(u32, dp->phy.attrs.max_link_rate * 100,
+ link->rate = min_t(u32, min(dp->max_link_rate, dp->phy.attrs.max_link_rate * 100),
drm_dp_max_link_rate(link->dpcd));
link->lanes = min_t(u8, dp->phy.attrs.bus_width,
drm_dp_max_lane_count(link->dpcd));
@@ -1704,6 +1705,49 @@
return 0;
}
+static u32 dw_dp_parse_link_frequencies(struct dw_dp *dp)
+{
+ struct udevice *dev = dp->dev;
+ const struct device_node *endpoint;
+ u64 frequency = 0;
+
+ endpoint = rockchip_of_graph_get_endpoint_by_regs(dev->node, 1, 0);
+ if (!endpoint)
+ return 0;
+
+ if (of_property_read_u64(endpoint, "link-frequencies", &frequency) < 0)
+ return 0;
+
+ if (!frequency)
+ return 0;
+
+ do_div(frequency, 10 * 1000); /* symbol rate kbytes */
+
+ switch (frequency) {
+ case 162000:
+ case 270000:
+ case 540000:
+ case 810000:
+ break;
+ default:
+ dev_err(dev, "invalid link frequency value: %llu\n", frequency);
+ return 0;
+ }
+
+ return frequency;
+}
+
+static int dw_dp_parse_dt(struct dw_dp *dp)
+{
+ dp->force_hpd = dev_read_bool(dp->dev, "force-hpd");
+
+ dp->max_link_rate = dw_dp_parse_link_frequencies(dp);
+ if (!dp->max_link_rate)
+ dp->max_link_rate = 810000;
+
+ return 0;
+}
+
static int dw_dp_probe(struct udevice *dev)
{
struct dw_dp *dp = dev_get_priv(dev);
@@ -1723,8 +1767,6 @@
return ret;
}
- dp->force_hpd = dev_read_bool(dev, "force-hpd");
-
ret = gpio_request_by_name(dev, "hpd-gpios", 0, &dp->hpd_gpio,
GPIOD_IS_IN);
if (ret && ret != -ENOENT) {
@@ -1736,6 +1778,12 @@
dp->dev = dev;
+ ret = dw_dp_parse_dt(dp);
+ if (ret) {
+ dev_err(dev, "failed to parse DT\n");
+ return ret;
+ }
+
dw_dp_ddc_init(dp);
rockchip_connector_bind(&dp->connector, dev, dp->id, &dw_dp_connector_funcs, NULL,
--
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