From 221bc77914cbcccaac1918ba80dce807452e143d Mon Sep 17 00:00:00 2001 From: Steven Price Date: Fri, 25 Oct 2019 14:41:42 +0100 Subject: [PATCH] drm/panfrost: Use generic code for devfreq Use dev_pm_opp_set_rate() instead of open coding the devfreq integration, simplifying the code. Reviewed-by: Mark Brown Reviewed-by: Tomeu Vizoso Acked-by: Alyssa Rosenzweig Signed-off-by: Steven Price Signed-off-by: Rob Herring Link: https://patchwork.freedesktop.org/patch/msgid/20191025134143.14324-2-steven.price@arm.com --- drivers/gpu/drm/panfrost/panfrost_devfreq.c | 60 ++++----------------- drivers/gpu/drm/panfrost/panfrost_device.h | 2 - 2 files changed, 10 insertions(+), 52 deletions(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c index 12ff77dacc95..7ded282a5ca8 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c @@ -18,55 +18,14 @@ static void panfrost_devfreq_update_utilization(struct panfrost_device *pfdev, i static int panfrost_devfreq_target(struct device *dev, unsigned long *freq, u32 flags) { - struct panfrost_device *pfdev = platform_get_drvdata(to_platform_device(dev)); - struct dev_pm_opp *opp; - unsigned long old_clk_rate = pfdev->devfreq.cur_freq; - unsigned long target_volt, target_rate; + struct panfrost_device *pfdev = dev_get_drvdata(dev); int err; - opp = devfreq_recommended_opp(dev, freq, flags); - if (IS_ERR(opp)) - return PTR_ERR(opp); - - target_rate = dev_pm_opp_get_freq(opp); - target_volt = dev_pm_opp_get_voltage(opp); - dev_pm_opp_put(opp); - - if (old_clk_rate == target_rate) - return 0; - - /* - * If frequency scaling from low to high, adjust voltage first. - * If frequency scaling from high to low, adjust frequency first. - */ - if (old_clk_rate < target_rate) { - err = regulator_set_voltage(pfdev->regulator, target_volt, - target_volt); - if (err) { - dev_err(dev, "Cannot set voltage %lu uV\n", - target_volt); - return err; - } - } - - err = clk_set_rate(pfdev->clock, target_rate); - if (err) { - dev_err(dev, "Cannot set frequency %lu (%d)\n", target_rate, - err); - regulator_set_voltage(pfdev->regulator, pfdev->devfreq.cur_volt, - pfdev->devfreq.cur_volt); + err = dev_pm_opp_set_rate(dev, *freq); + if (err) return err; - } - if (old_clk_rate > target_rate) { - err = regulator_set_voltage(pfdev->regulator, target_volt, - target_volt); - if (err) - dev_err(dev, "Cannot set voltage %lu uV\n", target_volt); - } - - pfdev->devfreq.cur_freq = target_rate; - pfdev->devfreq.cur_volt = target_volt; + *freq = clk_get_rate(pfdev->clock); return 0; } @@ -86,7 +45,7 @@ static void panfrost_devfreq_reset(struct panfrost_device *pfdev) static int panfrost_devfreq_get_dev_status(struct device *dev, struct devfreq_dev_status *status) { - struct panfrost_device *pfdev = platform_get_drvdata(to_platform_device(dev)); + struct panfrost_device *pfdev = dev_get_drvdata(dev); int i; for (i = 0; i < NUM_JOB_SLOTS; i++) { @@ -119,7 +78,7 @@ static int panfrost_devfreq_get_cur_freq(struct device *dev, unsigned long *freq { struct panfrost_device *pfdev = platform_get_drvdata(to_platform_device(dev)); - *freq = pfdev->devfreq.cur_freq; + *freq = clk_get_rate(pfdev->clock); return 0; } @@ -135,6 +94,7 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) { int ret; struct dev_pm_opp *opp; + unsigned long cur_freq; ret = dev_pm_opp_of_add_table(&pfdev->pdev->dev); if (ret == -ENODEV) /* Optional, continue without devfreq */ @@ -144,13 +104,13 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) panfrost_devfreq_reset(pfdev); - pfdev->devfreq.cur_freq = clk_get_rate(pfdev->clock); + cur_freq = clk_get_rate(pfdev->clock); - opp = devfreq_recommended_opp(&pfdev->pdev->dev, &pfdev->devfreq.cur_freq, 0); + opp = devfreq_recommended_opp(&pfdev->pdev->dev, &cur_freq, 0); if (IS_ERR(opp)) return PTR_ERR(opp); - panfrost_devfreq_profile.initial_freq = pfdev->devfreq.cur_freq; + panfrost_devfreq_profile.initial_freq = cur_freq; dev_pm_opp_put(opp); pfdev->devfreq.devfreq = devm_devfreq_add_device(&pfdev->pdev->dev, diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h index 9c39b9794811..72628f055197 100644 --- a/drivers/gpu/drm/panfrost/panfrost_device.h +++ b/drivers/gpu/drm/panfrost/panfrost_device.h @@ -93,8 +93,6 @@ struct panfrost_device { struct { struct devfreq *devfreq; struct thermal_cooling_device *cooling; - unsigned long cur_freq; - unsigned long cur_volt; struct panfrost_devfreq_slot slot[NUM_JOB_SLOTS]; } devfreq; }; -- 2.45.2