On 4/28/2020 10:02 PM, Rob Clark wrote:
On Tue, Apr 28, 2020 at 6:39 AM Rajendra Nayak rnayak@codeaurora.org wrote:
On some qualcomm platforms DPU needs to express a perforamnce state
s/perforamnce/performance/
requirement on a power domain depennding on the clock rates.
s/depennding/depending/
Use OPP table from DT to register with OPP framework and use dev_pm_opp_set_rate() to set the clk/perf state.
Signed-off-by: Rajendra Nayak rnayak@codeaurora.org Cc: Rob Clark robdclark@gmail.com Cc: Sean Paul sean@poorly.run Cc: dri-devel@lists.freedesktop.org
drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c | 3 ++- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 25 ++++++++++++++++++++++++- drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h | 4 ++++ 3 files changed, 30 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c index 11f2beb..fe5717df 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c @@ -7,6 +7,7 @@ #include <linux/debugfs.h> #include <linux/errno.h> #include <linux/mutex.h> +#include <linux/pm_opp.h> #include <linux/sort.h> #include <linux/clk.h> #include <linux/bitmap.h> @@ -239,7 +240,7 @@ static int _dpu_core_perf_set_core_clk_rate(struct dpu_kms *kms, u64 rate) rate = core_clk->max_rate;
core_clk->rate = rate;
return msm_dss_clk_set_rate(core_clk, 1);
return dev_pm_opp_set_rate(&kms->pdev->dev, core_clk->rate);I think this leaves msm_dss_clk_set_rate() unused now?
yup, I didn't realise, I will get rid of it when I respin.
Other than that,
Reviewed-by: Rob Clark robdclark@chromium.org
Thanks.
}
static u64 _dpu_core_perf_get_core_clk_rate(struct dpu_kms *kms) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c index ce19f1d..2f53bbf 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c @@ -10,6 +10,7 @@ #include <linux/debugfs.h> #include <linux/dma-buf.h> #include <linux/of_irq.h> +#include <linux/pm_opp.h>
#include <drm/drm_crtc.h> #include <drm/drm_file.h> @@ -1033,11 +1034,23 @@ static int dpu_bind(struct device *dev, struct device *master, void *data) if (!dpu_kms) return -ENOMEM;
dpu_kms->opp_table = dev_pm_opp_set_clkname(dev, "core");if (IS_ERR(dpu_kms->opp_table))return PTR_ERR(dpu_kms->opp_table);/* OPP table is optional */ret = dev_pm_opp_of_add_table(dev);if (!ret) {dpu_kms->has_opp_table = true;} else if (ret != -ENODEV) {dev_err(dev, "Invalid OPP table in Device tree\n");return ret;}mp = &dpu_kms->mp; ret = msm_dss_parse_clock(pdev, mp); if (ret) { DPU_ERROR("failed to parse clocks, ret=%d\n", ret);
return ret;
goto err; } platform_set_drvdata(pdev, dpu_kms);@@ -1051,6 +1064,11 @@ static int dpu_bind(struct device *dev, struct device *master, void *data)
priv->kms = &dpu_kms->base; return ret;+err:
if (dpu_kms->has_opp_table)dev_pm_opp_of_remove_table(dev);dev_pm_opp_put_clkname(dpu_kms->opp_table);return ret;}
static void dpu_unbind(struct device *dev, struct device *master, void *data)
@@ -1059,6 +1077,9 @@ static void dpu_unbind(struct device *dev, struct device *master, void *data) struct dpu_kms *dpu_kms = platform_get_drvdata(pdev); struct dss_module_power *mp = &dpu_kms->mp;
if (dpu_kms->has_opp_table)dev_pm_opp_of_remove_table(dev);dev_pm_opp_put_clkname(dpu_kms->opp_table); msm_dss_put_clk(mp->clk_config, mp->num_clk); devm_kfree(&pdev->dev, mp->clk_config); mp->num_clk = 0;@@ -1090,6 +1111,8 @@ static int __maybe_unused dpu_runtime_suspend(struct device *dev) struct dpu_kms *dpu_kms = platform_get_drvdata(pdev); struct dss_module_power *mp = &dpu_kms->mp;
/* Drop the performance state vote */dev_pm_opp_set_rate(dev, 0); rc = msm_dss_enable_clk(mp->clk_config, mp->num_clk, false); if (rc) DPU_ERROR("clock disable failed rc:%d\n", rc);diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h index 211f5de9..2a52e4e 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h @@ -128,6 +128,10 @@ struct dpu_kms {
struct platform_device *pdev; bool rpm_enabled;
struct opp_table *opp_table;bool has_opp_table;struct dss_module_power mp; /* reference count bandwidth requests, so we know when we can-- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation