drm/amd/display: Try RGB before YCbCr 4:4:4 in stream validationgrafted

amdgpu_dm_create_validate_stream_for_sink() walks encoding_order[] and
uses the first encoding that validates. YCbCr 4:4:4 is listed before
RGB, so an HDMI sink that advertises 4:4:4 gets YCbCr 4:4:4 whenever the
"color format" property is left at AUTO, even though RGB fits the same
link.

That contradicts the documented AUTO behaviour for HDMI in enum
drm_connector_color_format (RGB, falling back to YCbCr 4:2:0 only when
the bandwidth is not available or the mode is 4:2:0-only), which the
amdgpu implementation of the property also describes. It also leaves
the "Broadcast RGB" property without effect on such sinks, since the
quantization range it selects only applies to RGB output.

Try RGB first. The mask still holds every encoding the sink supports,
so a mode that cannot carry RGB falls back exactly as before.

For reference, v7.2 picked RGB here unless YCbCr 4:4:4 was forced
through debugfs, while earlier kernels picked YCbCr 4:4:4 for any HDMI
sink that advertised it.

Fixes: 0b0ff65d3ca1 ("drm/amd/display: Refactor stream validation")
Suggested-by: Adolfo Rodrigues <adolfotregosa@gmail.com>
Assisted-by: Claude Code:claude-fable-5-1
Signed-off-by: Adrian Betschart <adrian.betschart@cinemaone.ch>
Reviewed-by: Fangzhi Zuo <jerry.zuo@amd.com>
Tested-by: Adolfo Rodrigues <adolfotregosa@gmail.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 7de432bc753133764dc40d37f9388da56de251e7)

1 files changed, 114 insertions, 0 deletions

diff --git a/drivers/input/misc/gpio-beeper.c b/drivers/input/misc/gpio-beeper.c
new file mode 100644
index 000000000..3d65cb4f4
--- /dev/null
+++ b/drivers/input/misc/gpio-beeper.c
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Generic GPIO beeper driver
+ *
+ * Copyright (C) 2013-2014 Alexander Shiyan <shc_work@mail.ru>
+ */
+
+#include <linux/input.h>
+#include <linux/module.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+
+#define BEEPER_MODNAME		"gpio-beeper"
+
+struct gpio_beeper {
+	struct work_struct	work;
+	struct gpio_desc	*desc;
+	bool			beeping;
+};
+
+static void gpio_beeper_toggle(struct gpio_beeper *beep, bool on)
+{
+	gpiod_set_value_cansleep(beep->desc, on);
+}
+
+static void gpio_beeper_work(struct work_struct *work)
+{
+	struct gpio_beeper *beep = container_of(work, struct gpio_beeper, work);
+
+	gpio_beeper_toggle(beep, beep->beeping);
+}
+
+static int gpio_beeper_event(struct input_dev *dev, unsigned int type,
+			     unsigned int code, int value)
+{
+	struct gpio_beeper *beep = input_get_drvdata(dev);
+
+	if (type != EV_SND || code != SND_BELL)
+		return -ENOTSUPP;
+
+	if (value < 0)
+		return -EINVAL;
+
+	beep->beeping = value;
+	/* Schedule work to actually turn the beeper on or off */
+	schedule_work(&beep->work);
+
+	return 0;
+}
+
+static void gpio_beeper_close(struct input_dev *input)
+{
+	struct gpio_beeper *beep = input_get_drvdata(input);
+
+	cancel_work_sync(&beep->work);
+	gpio_beeper_toggle(beep, false);
+}
+
+static int gpio_beeper_probe(struct platform_device *pdev)
+{
+	struct gpio_beeper *beep;
+	struct input_dev *input;
+
+	beep = devm_kzalloc(&pdev->dev, sizeof(*beep), GFP_KERNEL);
+	if (!beep)
+		return -ENOMEM;
+
+	beep->desc = devm_gpiod_get(&pdev->dev, NULL, GPIOD_OUT_LOW);
+	if (IS_ERR(beep->desc))
+		return PTR_ERR(beep->desc);
+
+	input = devm_input_allocate_device(&pdev->dev);
+	if (!input)
+		return -ENOMEM;
+
+	INIT_WORK(&beep->work, gpio_beeper_work);
+
+	input->name		= pdev->name;
+	input->id.bustype	= BUS_HOST;
+	input->id.vendor	= 0x0001;
+	input->id.product	= 0x0001;
+	input->id.version	= 0x0100;
+	input->close		= gpio_beeper_close;
+	input->event		= gpio_beeper_event;
+
+	input_set_capability(input, EV_SND, SND_BELL);
+
+	input_set_drvdata(input, beep);
+
+	return input_register_device(input);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id gpio_beeper_of_match[] = {
+	{ .compatible = "gpio-beeper", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, gpio_beeper_of_match);
+#endif
+
+static struct platform_driver gpio_beeper_platform_driver = {
+	.driver	= {
+		.name		= BEEPER_MODNAME,
+		.of_match_table	= of_match_ptr(gpio_beeper_of_match),
+	},
+	.probe	= gpio_beeper_probe,
+};
+module_platform_driver(gpio_beeper_platform_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
+MODULE_DESCRIPTION("Generic GPIO beeper driver");