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8d021d71b3
We received a donation of a Titan which has this useless feature allowing users to control the brightness of the LED behind the logo of NVIDIA. In the true spirit of open source, let's expose that to the users of very expensive cards! This patch hooks up this LED/PWM to the LED subsystem which allows blinking it in sync with cpu/disk/network/whatever activity (heartbeat is quite nice!). Users may also implement some breathing effect or morse code support in the userspace if they feel like it. v2: - surround the use of the LED framework with ifdef CONFIG_LEDS_CLASS v3: - avoid using ifdefs everywhere, follow the recommendations of /doc/Documentation/CodingStyle. Suggested by Emil Velikov. v4 (Ben): - squashed series of fixes from ml Signed-off-by: Martin Peres <martin.peres@free.fr> Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
/*
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* Copyright 2015 Martin Peres
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: Martin Peres <martin.peres@free.fr>
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*/
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#ifndef __NOUVEAU_LED_H__
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#define __NOUVEAU_LED_H__
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#include "nouveau_drv.h"
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struct led_classdev;
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struct nouveau_led {
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struct drm_device *dev;
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struct led_classdev led;
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};
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static inline struct nouveau_led *
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nouveau_led(struct drm_device *dev)
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{
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return nouveau_drm(dev)->led;
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}
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/* nouveau_led.c */
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#if IS_ENABLED(CONFIG_LEDS_CLASS)
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int nouveau_led_init(struct drm_device *dev);
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void nouveau_led_suspend(struct drm_device *dev);
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void nouveau_led_resume(struct drm_device *dev);
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void nouveau_led_fini(struct drm_device *dev);
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#else
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static inline int nouveau_led_init(struct drm_device *dev) { return 0; };
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static inline void nouveau_led_suspend(struct drm_device *dev) { };
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static inline void nouveau_led_resume(struct drm_device *dev) { };
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static inline void nouveau_led_fini(struct drm_device *dev) { };
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#endif
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#endif
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