As it stands, panthor keeps a cached current frequency value for when it wants to retrieve it. This doesn't work well for when things might switch frequency without panthor's knowledge.
Instead, implement the get_cur_freq operation, and expose it through a helper function to the rest of panthor. Reviewed-by: Chia-I Wu <[email protected]> Reviewed-by: Steven Price <[email protected]> Reviewed-by: AngeloGioacchino Del Regno <[email protected]> Signed-off-by: Nicolas Frattaroli <[email protected]> --- drivers/gpu/drm/panthor/panthor_devfreq.c | 30 ++++++++++++++++++++++++++---- drivers/gpu/drm/panthor/panthor_devfreq.h | 2 ++ drivers/gpu/drm/panthor/panthor_device.h | 3 --- drivers/gpu/drm/panthor/panthor_drv.c | 4 +++- 4 files changed, 31 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/panthor/panthor_devfreq.c b/drivers/gpu/drm/panthor/panthor_devfreq.c index 2df1d76d84a0..a6dca599f0a5 100644 --- a/drivers/gpu/drm/panthor/panthor_devfreq.c +++ b/drivers/gpu/drm/panthor/panthor_devfreq.c @@ -62,7 +62,6 @@ static void panthor_devfreq_update_utilization(struct panthor_devfreq *pdevfreq) static int panthor_devfreq_target(struct device *dev, unsigned long *freq, u32 flags) { - struct panthor_device *ptdev = dev_get_drvdata(dev); struct dev_pm_opp *opp; int err; @@ -72,8 +71,6 @@ static int panthor_devfreq_target(struct device *dev, unsigned long *freq, dev_pm_opp_put(opp); err = dev_pm_opp_set_rate(dev, *freq); - if (!err) - ptdev->current_frequency = *freq; return err; } @@ -115,11 +112,21 @@ static int panthor_devfreq_get_dev_status(struct device *dev, return 0; } +static int panthor_devfreq_get_cur_freq(struct device *dev, unsigned long *freq) +{ + struct panthor_device *ptdev = dev_get_drvdata(dev); + + *freq = clk_get_rate(ptdev->clks.core); + + return 0; +} + static struct devfreq_dev_profile panthor_devfreq_profile = { .timer = DEVFREQ_TIMER_DELAYED, .polling_ms = 50, /* ~3 frames */ .target = panthor_devfreq_target, .get_dev_status = panthor_devfreq_get_dev_status, + .get_cur_freq = panthor_devfreq_get_cur_freq, }; int panthor_devfreq_init(struct panthor_device *ptdev) @@ -197,7 +204,6 @@ int panthor_devfreq_init(struct panthor_device *ptdev) return PTR_ERR(opp); panthor_devfreq_profile.initial_freq = cur_freq; - ptdev->current_frequency = cur_freq; /* * Set the recommend OPP this will enable and configure the regulator @@ -295,3 +301,19 @@ void panthor_devfreq_record_idle(struct panthor_device *ptdev) spin_unlock_irqrestore(&pdevfreq->lock, irqflags); } + +unsigned long panthor_devfreq_get_freq(struct panthor_device *ptdev) +{ + struct panthor_devfreq *pdevfreq = ptdev->devfreq; + unsigned long freq = 0; + int ret; + + if (!pdevfreq->devfreq) + return 0; + + ret = pdevfreq->devfreq->profile->get_cur_freq(ptdev->base.dev, &freq); + if (ret) + return 0; + + return freq; +} diff --git a/drivers/gpu/drm/panthor/panthor_devfreq.h b/drivers/gpu/drm/panthor/panthor_devfreq.h index b7631de695f7..f8e29e02f66c 100644 --- a/drivers/gpu/drm/panthor/panthor_devfreq.h +++ b/drivers/gpu/drm/panthor/panthor_devfreq.h @@ -18,4 +18,6 @@ void panthor_devfreq_suspend(struct panthor_device *ptdev); void panthor_devfreq_record_busy(struct panthor_device *ptdev); void panthor_devfreq_record_idle(struct panthor_device *ptdev); +unsigned long panthor_devfreq_get_freq(struct panthor_device *ptdev); + #endif /* __PANTHOR_DEVFREQ_H__ */ diff --git a/drivers/gpu/drm/panthor/panthor_device.h b/drivers/gpu/drm/panthor/panthor_device.h index 9f0649ecfc4f..f32c1868bf6d 100644 --- a/drivers/gpu/drm/panthor/panthor_device.h +++ b/drivers/gpu/drm/panthor/panthor_device.h @@ -214,9 +214,6 @@ struct panthor_device { /** @profile_mask: User-set profiling flags for job accounting. */ u32 profile_mask; - /** @current_frequency: Device clock frequency at present. Set by DVFS*/ - unsigned long current_frequency; - /** @fast_rate: Maximum device clock frequency. Set by DVFS */ unsigned long fast_rate; diff --git a/drivers/gpu/drm/panthor/panthor_drv.c b/drivers/gpu/drm/panthor/panthor_drv.c index fb4b293f17f0..75898d83a207 100644 --- a/drivers/gpu/drm/panthor/panthor_drv.c +++ b/drivers/gpu/drm/panthor/panthor_drv.c @@ -25,6 +25,7 @@ #include <drm/gpu_scheduler.h> #include <drm/panthor_drm.h> +#include "panthor_devfreq.h" #include "panthor_device.h" #include "panthor_fw.h" #include "panthor_gem.h" @@ -1519,7 +1520,8 @@ static void panthor_gpu_show_fdinfo(struct panthor_device *ptdev, drm_printf(p, "drm-cycles-panthor:\t%llu\n", pfile->stats.cycles); drm_printf(p, "drm-maxfreq-panthor:\t%lu Hz\n", ptdev->fast_rate); - drm_printf(p, "drm-curfreq-panthor:\t%lu Hz\n", ptdev->current_frequency); + drm_printf(p, "drm-curfreq-panthor:\t%lu Hz\n", + panthor_devfreq_get_freq(ptdev)); } static void panthor_show_internal_memory_stats(struct drm_printer *p, struct drm_file *file) -- 2.51.0
