From 08f87f769b595151be1afeff53e144f543faa614 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 06 Dec 2023 09:51:13 +0000
Subject: [PATCH] add dts config
---
kernel/drivers/gpu/drm/bridge/thc63lvd1024.c | 78 +++++++++++++++++++++++++++++++++------
1 files changed, 66 insertions(+), 12 deletions(-)
diff --git a/kernel/drivers/gpu/drm/bridge/thc63lvd1024.c b/kernel/drivers/gpu/drm/bridge/thc63lvd1024.c
index c8b9edd..86b0697 100644
--- a/kernel/drivers/gpu/drm/bridge/thc63lvd1024.c
+++ b/kernel/drivers/gpu/drm/bridge/thc63lvd1024.c
@@ -5,14 +5,16 @@
* Copyright (C) 2018 Jacopo Mondi <jacopo+renesas@jmondi.org>
*/
-#include <drm/drmP.h>
-#include <drm/drm_bridge.h>
-#include <drm/drm_panel.h>
-
#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/of.h>
#include <linux/of_graph.h>
+#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
+
+#include <drm/drm_bridge.h>
+#include <drm/drm_panel.h>
enum thc63_ports {
THC63_LVDS_IN0,
@@ -31,6 +33,8 @@
struct drm_bridge bridge;
struct drm_bridge *next;
+
+ struct drm_bridge_timings timings;
};
static inline struct thc63_dev *to_thc63(struct drm_bridge *bridge)
@@ -38,11 +42,43 @@
return container_of(bridge, struct thc63_dev, bridge);
}
-static int thc63_attach(struct drm_bridge *bridge)
+static int thc63_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
{
struct thc63_dev *thc63 = to_thc63(bridge);
- return drm_bridge_attach(bridge->encoder, thc63->next, bridge);
+ return drm_bridge_attach(bridge->encoder, thc63->next, bridge, flags);
+}
+
+static enum drm_mode_status thc63_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct thc63_dev *thc63 = to_thc63(bridge);
+ unsigned int min_freq;
+ unsigned int max_freq;
+
+ /*
+ * The THC63LVD1024 pixel rate range is 8 to 135 MHz in all modes but
+ * dual-in, single-out where it is 40 to 150 MHz. As dual-in, dual-out
+ * isn't supported by the driver yet, simply derive the limits from the
+ * input mode.
+ */
+ if (thc63->timings.dual_link) {
+ min_freq = 40000;
+ max_freq = 150000;
+ } else {
+ min_freq = 8000;
+ max_freq = 135000;
+ }
+
+ if (mode->clock < min_freq)
+ return MODE_CLOCK_LOW;
+
+ if (mode->clock > max_freq)
+ return MODE_CLOCK_HIGH;
+
+ return MODE_OK;
}
static void thc63_enable(struct drm_bridge *bridge)
@@ -77,25 +113,26 @@
static const struct drm_bridge_funcs thc63_bridge_func = {
.attach = thc63_attach,
+ .mode_valid = thc63_mode_valid,
.enable = thc63_enable,
.disable = thc63_disable,
};
static int thc63_parse_dt(struct thc63_dev *thc63)
{
- struct device_node *thc63_out;
+ struct device_node *endpoint;
struct device_node *remote;
- thc63_out = of_graph_get_endpoint_by_regs(thc63->dev->of_node,
- THC63_RGB_OUT0, -1);
- if (!thc63_out) {
+ endpoint = of_graph_get_endpoint_by_regs(thc63->dev->of_node,
+ THC63_RGB_OUT0, -1);
+ if (!endpoint) {
dev_err(thc63->dev, "Missing endpoint in port@%u\n",
THC63_RGB_OUT0);
return -ENODEV;
}
- remote = of_graph_get_remote_port_parent(thc63_out);
- of_node_put(thc63_out);
+ remote = of_graph_get_remote_port_parent(endpoint);
+ of_node_put(endpoint);
if (!remote) {
dev_err(thc63->dev, "Endpoint in port@%u unconnected\n",
THC63_RGB_OUT0);
@@ -113,6 +150,22 @@
of_node_put(remote);
if (!thc63->next)
return -EPROBE_DEFER;
+
+ endpoint = of_graph_get_endpoint_by_regs(thc63->dev->of_node,
+ THC63_LVDS_IN1, -1);
+ if (endpoint) {
+ remote = of_graph_get_remote_port_parent(endpoint);
+ of_node_put(endpoint);
+
+ if (remote) {
+ if (of_device_is_available(remote))
+ thc63->timings.dual_link = true;
+ of_node_put(remote);
+ }
+ }
+
+ dev_dbg(thc63->dev, "operating in %s-link mode\n",
+ thc63->timings.dual_link ? "dual" : "single");
return 0;
}
@@ -170,6 +223,7 @@
thc63->bridge.driver_private = thc63;
thc63->bridge.of_node = pdev->dev.of_node;
thc63->bridge.funcs = &thc63_bridge_func;
+ thc63->bridge.timings = &thc63->timings;
drm_bridge_add(&thc63->bridge);
--
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