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authorRajendra Nayak <rnayak@codeaurora.org>2020-07-09 16:34:31 +0530
committerRob Clark <robdclark@chromium.org>2020-07-31 06:46:15 -0700
commitb0530eb1191307e9038d75e5c83973a396137681 (patch)
treebb44252fa740a46f32123b182f8bce732ddaa42b /drivers/gpu
parent5e16372b5940b1fecc3cc887fc02a50ba148d373 (diff)
drm/msm/dpu: Use OPP API to set clk/perf state
On some qualcomm platforms DPU needs to express a performance state requirement on a power domain depending on the clock rates. 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> Reviewed-by: Rob Clark <robdclark@chromium.org> Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Signed-off-by: Rob Clark <robdclark@chromium.org>
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c3
-rw-r--r--drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c27
-rw-r--r--drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h4
3 files changed, 32 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 7c230f719ad3..b36919d95362 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>
@@ -218,7 +219,7 @@ 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);
}
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 7d7171633ec8..f2bbce42c760 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>
@@ -1025,11 +1026,24 @@ 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");
+ dev_pm_opp_put_clkname(dpu_kms->opp_table);
+ 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);
@@ -1043,6 +1057,11 @@ 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)
@@ -1057,6 +1076,10 @@ static void dpu_unbind(struct device *dev, struct device *master, void *data)
if (dpu_kms->rpm_enabled)
pm_runtime_disable(&pdev->dev);
+
+ if (dpu_kms->has_opp_table)
+ dev_pm_opp_of_remove_table(dev);
+ dev_pm_opp_put_clkname(dpu_kms->opp_table);
}
static const struct component_ops dpu_ops = {
@@ -1082,6 +1105,8 @@ 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 a3b122bfb676..7400cd758a49 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