diff options
Diffstat (limited to 'drivers/gpu/drm/panfrost/panfrost_devfreq.c')
| -rw-r--r-- | drivers/gpu/drm/panfrost/panfrost_devfreq.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panfrost/panfrost_devfreq.c b/drivers/gpu/drm/panfrost/panfrost_devfreq.c index fe5f12f16a63..58dfb15a8757 100644 --- a/drivers/gpu/drm/panfrost/panfrost_devfreq.c +++ b/drivers/gpu/drm/panfrost/panfrost_devfreq.c @@ -4,6 +4,7 @@ #include <linux/clk.h> #include <linux/devfreq.h> #include <linux/devfreq_cooling.h> +#include <linux/nvmem-consumer.h> #include <linux/platform_device.h> #include <linux/pm_opp.h> @@ -82,6 +83,31 @@ static struct devfreq_dev_profile panfrost_devfreq_profile = { .get_dev_status = panfrost_devfreq_get_dev_status, }; +static int panfrost_read_speedbin(struct device *dev) +{ + u32 val; + int ret; + + ret = nvmem_cell_read_variable_le_u32(dev, "speed-bin", &val); + if (ret) { + /* + * -ENOENT means that this platform doesn't support speedbins + * as it didn't declare any speed-bin nvmem: in this case, we + * keep going without it; any other error means that we are + * supposed to read the bin value, but we failed doing so. + */ + if (ret != -ENOENT) { + DRM_DEV_ERROR(dev, "Cannot read speed-bin (%d).", ret); + return ret; + } + + return 0; + } + DRM_DEV_DEBUG(dev, "Using speed-bin = 0x%x\n", val); + + return devm_pm_opp_set_supported_hw(dev, &val, 1); +} + int panfrost_devfreq_init(struct panfrost_device *pfdev) { int ret; @@ -101,6 +127,10 @@ int panfrost_devfreq_init(struct panfrost_device *pfdev) return 0; } + ret = panfrost_read_speedbin(dev); + if (ret) + return ret; + ret = devm_pm_opp_set_regulators(dev, pfdev->comp->supply_names); if (ret) { /* Continue if the optional regulator is missing */ |