From 1d048afe7e52462d6b2a31dd6ee09c4475f39b4b Mon Sep 17 00:00:00 2001 From: Christian Hewitt Date: Wed, 27 Jan 2021 19:40:47 +0000 Subject: [PATCH] drm/lima: add governor data with pre-defined thresholds This patch adapts the panfrost pre-defined thresholds change [0] to the lima driver to improve real-world performance. The upthreshold value has been set to ramp GPU frequency to max freq faster (compared to panfrost) to compensate for the lower overall performance of utgard devices. [0] https://patchwork.kernel.org/project/dri-devel/patch/20210121170445.19761-1-lukasz.luba@arm.com/ Signed-off-by: Christian Hewitt Reviewed-by: Lukasz Luba Signed-off-by: Qiang Yu Link: https://patchwork.freedesktop.org/patch/msgid/20210127194047.21462-1-christianshewitt@gmail.com --- drivers/gpu/drm/lima/lima_devfreq.c | 10 +++++++++- drivers/gpu/drm/lima/lima_devfreq.h | 2 ++ 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/lima/lima_devfreq.c b/drivers/gpu/drm/lima/lima_devfreq.c index f1c9eb3..4f64940 100644 --- a/drivers/gpu/drm/lima/lima_devfreq.c +++ b/drivers/gpu/drm/lima/lima_devfreq.c @@ -164,8 +164,16 @@ int lima_devfreq_init(struct lima_device *ldev) lima_devfreq_profile.initial_freq = cur_freq; dev_pm_opp_put(opp); + /* + * Setup default thresholds for the simple_ondemand governor. + * The values are chosen based on experiments. + */ + ldevfreq->gov_data.upthreshold = 30; + ldevfreq->gov_data.downdifferential = 5; + devfreq = devm_devfreq_add_device(dev, &lima_devfreq_profile, - DEVFREQ_GOV_SIMPLE_ONDEMAND, NULL); + DEVFREQ_GOV_SIMPLE_ONDEMAND, + &ldevfreq->gov_data); if (IS_ERR(devfreq)) { dev_err(dev, "Couldn't initialize GPU devfreq\n"); ret = PTR_ERR(devfreq); diff --git a/drivers/gpu/drm/lima/lima_devfreq.h b/drivers/gpu/drm/lima/lima_devfreq.h index 2d9b300..b0c7c73 100644 --- a/drivers/gpu/drm/lima/lima_devfreq.h +++ b/drivers/gpu/drm/lima/lima_devfreq.h @@ -4,6 +4,7 @@ #ifndef __LIMA_DEVFREQ_H__ #define __LIMA_DEVFREQ_H__ +#include #include #include @@ -18,6 +19,7 @@ struct lima_devfreq { struct opp_table *clkname_opp_table; struct opp_table *regulators_opp_table; struct thermal_cooling_device *cooling; + struct devfreq_simple_ondemand_data gov_data; ktime_t busy_time; ktime_t idle_time; -- 2.7.4