mirror of
https://gitee.com/bianbu-linux/linux-6.6
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af5b4fff0f
Before we start adding more cleverness, split it into it's own file. Signed-off-by: Rob Clark <robdclark@chromium.org> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> Link: https://lore.kernel.org/r/20210726144653.2180096-2-robdclark@gmail.com Signed-off-by: Rob Clark <robdclark@chromium.org>
133 lines
3 KiB
C
133 lines
3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2013 Red Hat
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* Author: Rob Clark <robdclark@gmail.com>
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*/
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#include "msm_gpu.h"
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#include "msm_gpu_trace.h"
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#include <linux/devfreq.h>
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#include <linux/devfreq_cooling.h>
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/*
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* Power Management:
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*/
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static int msm_devfreq_target(struct device *dev, unsigned long *freq,
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u32 flags)
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{
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struct msm_gpu *gpu = dev_to_gpu(dev);
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struct dev_pm_opp *opp;
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opp = devfreq_recommended_opp(dev, freq, flags);
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if (IS_ERR(opp))
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return PTR_ERR(opp);
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trace_msm_gpu_freq_change(dev_pm_opp_get_freq(opp));
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if (gpu->funcs->gpu_set_freq)
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gpu->funcs->gpu_set_freq(gpu, opp);
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else
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clk_set_rate(gpu->core_clk, *freq);
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dev_pm_opp_put(opp);
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return 0;
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}
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static int msm_devfreq_get_dev_status(struct device *dev,
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struct devfreq_dev_status *status)
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{
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struct msm_gpu *gpu = dev_to_gpu(dev);
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ktime_t time;
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if (gpu->funcs->gpu_get_freq)
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status->current_frequency = gpu->funcs->gpu_get_freq(gpu);
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else
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status->current_frequency = clk_get_rate(gpu->core_clk);
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status->busy_time = gpu->funcs->gpu_busy(gpu);
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time = ktime_get();
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status->total_time = ktime_us_delta(time, gpu->devfreq.time);
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gpu->devfreq.time = time;
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return 0;
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}
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static int msm_devfreq_get_cur_freq(struct device *dev, unsigned long *freq)
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{
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struct msm_gpu *gpu = dev_to_gpu(dev);
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if (gpu->funcs->gpu_get_freq)
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*freq = gpu->funcs->gpu_get_freq(gpu);
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else
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*freq = clk_get_rate(gpu->core_clk);
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return 0;
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}
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static struct devfreq_dev_profile msm_devfreq_profile = {
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.polling_ms = 10,
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.target = msm_devfreq_target,
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.get_dev_status = msm_devfreq_get_dev_status,
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.get_cur_freq = msm_devfreq_get_cur_freq,
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};
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void msm_devfreq_init(struct msm_gpu *gpu)
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{
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/* We need target support to do devfreq */
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if (!gpu->funcs->gpu_busy)
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return;
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msm_devfreq_profile.initial_freq = gpu->fast_rate;
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/*
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* Don't set the freq_table or max_state and let devfreq build the table
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* from OPP
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* After a deferred probe, these may have be left to non-zero values,
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* so set them back to zero before creating the devfreq device
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*/
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msm_devfreq_profile.freq_table = NULL;
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msm_devfreq_profile.max_state = 0;
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gpu->devfreq.devfreq = devm_devfreq_add_device(&gpu->pdev->dev,
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&msm_devfreq_profile, DEVFREQ_GOV_SIMPLE_ONDEMAND,
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NULL);
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if (IS_ERR(gpu->devfreq.devfreq)) {
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DRM_DEV_ERROR(&gpu->pdev->dev, "Couldn't initialize GPU devfreq\n");
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gpu->devfreq.devfreq = NULL;
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return;
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}
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devfreq_suspend_device(gpu->devfreq.devfreq);
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gpu->cooling = of_devfreq_cooling_register(gpu->pdev->dev.of_node,
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gpu->devfreq.devfreq);
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if (IS_ERR(gpu->cooling)) {
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DRM_DEV_ERROR(&gpu->pdev->dev,
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"Couldn't register GPU cooling device\n");
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gpu->cooling = NULL;
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}
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}
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void msm_devfreq_cleanup(struct msm_gpu *gpu)
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{
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devfreq_cooling_unregister(gpu->cooling);
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}
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void msm_devfreq_resume(struct msm_gpu *gpu)
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{
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gpu->devfreq.busy_cycles = 0;
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gpu->devfreq.time = ktime_get();
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devfreq_resume_device(gpu->devfreq.devfreq);
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}
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void msm_devfreq_suspend(struct msm_gpu *gpu)
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{
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devfreq_suspend_device(gpu->devfreq.devfreq);
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}
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