From 106b4a2a78b2a2f14885604891957b84bba502db Mon Sep 17 00:00:00 2001 From: Adrian Betschart Date: Fri, 11 Sep 2026 17:13:14 +0200 Subject: drm/amd/display: Try RGB before YCbCr 4:4:4 in stream validation 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 Assisted-by: Claude Code:claude-fable-5-1 Signed-off-by: Adrian Betschart Reviewed-by: Fangzhi Zuo Tested-by: Adolfo Rodrigues Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher (cherry picked from commit 7de432bc753133764dc40d37f9388da56de251e7) --- drivers/input/misc/gpio-beeper.c | 114 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 114 insertions(+) create mode 100644 drivers/input/misc/gpio-beeper.c (limited to 'drivers/input/misc/gpio-beeper.c') 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 + */ + +#include +#include +#include +#include +#include +#include + +#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 "); +MODULE_DESCRIPTION("Generic GPIO beeper driver"); -- cgit v1.3.1