Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 140 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_led.c b/drivers/gpu/drm/nouveau/nouveau_led.c
new file mode 100644
index 000000000..2c5e0628d
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_led.c
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2016 Martin Peres
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial
+ * portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+/*
+ * Authors:
+ *  Martin Peres <martin.peres@free.fr>
+ */
+
+#include <linux/leds.h>
+
+#include "nouveau_led.h"
+#include <nvkm/subdev/gpio.h>
+
+static enum led_brightness
+nouveau_led_get_brightness(struct led_classdev *led)
+{
+	struct drm_device *drm_dev = container_of(led, struct nouveau_led, led)->dev;
+	struct nouveau_drm *drm = nouveau_drm(drm_dev);
+	struct nvif_object *device = &drm->client.device.object;
+	u32 div, duty;
+
+	div =  nvif_rd32(device, 0x61c880) & 0x00ffffff;
+	duty = nvif_rd32(device, 0x61c884) & 0x00ffffff;
+
+	if (div > 0)
+		return duty * LED_FULL / div;
+	else
+		return 0;
+}
+
+static void
+nouveau_led_set_brightness(struct led_classdev *led, enum led_brightness value)
+{
+	struct drm_device *drm_dev = container_of(led, struct nouveau_led, led)->dev;
+	struct nouveau_drm *drm = nouveau_drm(drm_dev);
+	struct nvif_object *device = &drm->client.device.object;
+
+	u32 input_clk = 27e6; /* PDISPLAY.SOR[1].PWM is connected to the crystal */
+	u32 freq = 100; /* this is what nvidia uses and it should be good-enough */
+	u32 div, duty;
+
+	div = input_clk / freq;
+	duty = value * div / LED_FULL;
+
+	/* for now, this is safe to directly poke those registers because:
+	 *  - A: nvidia never puts the logo led to any other PWM controler
+	 *       than PDISPLAY.SOR[1].PWM.
+	 *  - B: nouveau does not touch these registers anywhere else
+	 */
+	nvif_wr32(device, 0x61c880, div);
+	nvif_wr32(device, 0x61c884, 0xc0000000 | duty);
+}
+
+
+int
+nouveau_led_init(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nvkm_gpio *gpio = nvxx_gpio(&drm->client.device);
+	struct dcb_gpio_func logo_led;
+	int ret;
+
+	if (!gpio)
+		return 0;
+
+	/* check that there is a GPIO controlling the logo LED */
+	if (nvkm_gpio_find(gpio, 0, DCB_GPIO_LOGO_LED_PWM, 0xff, &logo_led))
+		return 0;
+
+	drm->led = kzalloc(sizeof(*drm->led), GFP_KERNEL);
+	if (!drm->led)
+		return -ENOMEM;
+	drm->led->dev = dev;
+
+	drm->led->led.name = "nvidia-logo";
+	drm->led->led.max_brightness = 255;
+	drm->led->led.brightness_get = nouveau_led_get_brightness;
+	drm->led->led.brightness_set = nouveau_led_set_brightness;
+
+	ret = led_classdev_register(dev->dev, &drm->led->led);
+	if (ret) {
+		kfree(drm->led);
+		drm->led = NULL;
+		return ret;
+	}
+
+	return 0;
+}
+
+void
+nouveau_led_suspend(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+
+	if (drm->led)
+		led_classdev_suspend(&drm->led->led);
+}
+
+void
+nouveau_led_resume(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+
+	if (drm->led)
+		led_classdev_resume(&drm->led->led);
+}
+
+void
+nouveau_led_fini(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+
+	if (drm->led) {
+		led_classdev_unregister(&drm->led->led);
+		kfree(drm->led);
+		drm->led = NULL;
+	}
+}