linux/drivers/gpu/drm/radeon/radeon_clocks.c

/*
 * Copyright 2008 Advanced Micro Devices, Inc.
 * Copyright 2008 Red Hat Inc.
 * Copyright 2009 Jerome Glisse.
 *
 * 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 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 HOLDER(S) OR AUTHOR(S) 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: Dave Airlie
 *          Alex Deucher
 *          Jerome Glisse
 */

#include <linux/pci.h>

#include <drm/drm_device.h>
#include <drm/radeon_drm.h>

#include "atom.h"
#include "radeon.h"
#include "radeon_asic.h"
#include "radeon_reg.h"

/* 10 khz */
uint32_t radeon_legacy_get_engine_clock(struct radeon_device *rdev)
{ … }

/* 10 khz */
uint32_t radeon_legacy_get_memory_clock(struct radeon_device *rdev)
{ … }

#ifdef CONFIG_OF
/*
 * Read XTAL (ref clock), SCLK and MCLK from Open Firmware device
 * tree. Hopefully, ATI OF driver is kind enough to fill these
 */
static bool radeon_read_clocks_OF(struct drm_device *dev)
{ … }
#else
static bool radeon_read_clocks_OF(struct drm_device *dev)
{
	return false;
}
#endif /* CONFIG_OF */

void radeon_get_clock_info(struct drm_device *dev)
{ … }

/* 10 khz */
static uint32_t calc_eng_mem_clock(struct radeon_device *rdev,
				   uint32_t req_clock,
				   int *fb_div, int *post_div)
{ … }

/* 10 khz */
void radeon_legacy_set_engine_clock(struct radeon_device *rdev,
				    uint32_t eng_clock)
{ … }

void radeon_legacy_set_clock_gating(struct radeon_device *rdev, int enable)
{ … }