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Date: Mon, 26 Jul 2021 07:46:48 -0700
From: Rob Clark <robdclark@...il.com>
To: dri-devel@...ts.freedesktop.org
Cc: Rob Clark <robdclark@...omium.org>,
Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Jordan Crouse <jordan@...micpenguin.net>,
Jonathan Marek <jonathan@...ek.ca>,
Akhil P Oommen <akhilpo@...eaurora.org>,
Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
Sharat Masetty <smasetty@...eaurora.org>,
Douglas Anderson <dianders@...omium.org>,
linux-kernel@...r.kernel.org (open list),
linux-arm-msm@...r.kernel.org (open list:DRM DRIVER FOR MSM ADRENO GPU),
freedreno@...ts.freedesktop.org (open list:DRM DRIVER FOR MSM ADRENO
GPU)
Subject: [PATCH v2 1/3] drm/msm: Split out devfreq handling
From: Rob Clark <robdclark@...omium.org>
Before we start adding more cleverness, split it into it's own file.
Signed-off-by: Rob Clark <robdclark@...omium.org>
---
drivers/gpu/drm/msm/Makefile | 1 +
drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 4 +-
drivers/gpu/drm/msm/msm_gpu.c | 116 +---------------------
drivers/gpu/drm/msm/msm_gpu.h | 32 +++++--
drivers/gpu/drm/msm/msm_gpu_devfreq.c | 133 ++++++++++++++++++++++++++
5 files changed, 165 insertions(+), 121 deletions(-)
create mode 100644 drivers/gpu/drm/msm/msm_gpu_devfreq.c
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index 2c00aa70b708..904535eda0c4 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -90,6 +90,7 @@ msm-y := \
msm_gem_submit.o \
msm_gem_vma.o \
msm_gpu.o \
+ msm_gpu_devfreq.o \
msm_iommu.o \
msm_perf.o \
msm_rd.o \
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
index 9db9f7847ea8..91f637b908f4 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
@@ -1477,7 +1477,7 @@ static int a6xx_pm_resume(struct msm_gpu *gpu)
if (ret)
return ret;
- msm_gpu_resume_devfreq(gpu);
+ msm_devfreq_resume(gpu);
a6xx_llc_activate(a6xx_gpu);
@@ -1494,7 +1494,7 @@ static int a6xx_pm_suspend(struct msm_gpu *gpu)
a6xx_llc_deactivate(a6xx_gpu);
- devfreq_suspend_device(gpu->devfreq.devfreq);
+ msm_devfreq_suspend(gpu);
ret = a6xx_gmu_stop(a6xx_gpu);
if (ret)
diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c
index 647af45cf892..fedbd785e42f 100644
--- a/drivers/gpu/drm/msm/msm_gpu.c
+++ b/drivers/gpu/drm/msm/msm_gpu.c
@@ -13,8 +13,6 @@
#include <generated/utsrelease.h>
#include <linux/string_helpers.h>
-#include <linux/devfreq.h>
-#include <linux/devfreq_cooling.h>
#include <linux/devcoredump.h>
#include <linux/sched/task.h>
@@ -22,106 +20,6 @@
* Power Management:
*/
-static int msm_devfreq_target(struct device *dev, unsigned long *freq,
- u32 flags)
-{
- struct msm_gpu *gpu = dev_to_gpu(dev);
- struct dev_pm_opp *opp;
-
- opp = devfreq_recommended_opp(dev, freq, flags);
-
- if (IS_ERR(opp))
- return PTR_ERR(opp);
-
- trace_msm_gpu_freq_change(dev_pm_opp_get_freq(opp));
-
- if (gpu->funcs->gpu_set_freq)
- gpu->funcs->gpu_set_freq(gpu, opp);
- else
- clk_set_rate(gpu->core_clk, *freq);
-
- dev_pm_opp_put(opp);
-
- return 0;
-}
-
-static int msm_devfreq_get_dev_status(struct device *dev,
- struct devfreq_dev_status *status)
-{
- struct msm_gpu *gpu = dev_to_gpu(dev);
- ktime_t time;
-
- if (gpu->funcs->gpu_get_freq)
- status->current_frequency = gpu->funcs->gpu_get_freq(gpu);
- else
- status->current_frequency = clk_get_rate(gpu->core_clk);
-
- status->busy_time = gpu->funcs->gpu_busy(gpu);
-
- time = ktime_get();
- status->total_time = ktime_us_delta(time, gpu->devfreq.time);
- gpu->devfreq.time = time;
-
- return 0;
-}
-
-static int msm_devfreq_get_cur_freq(struct device *dev, unsigned long *freq)
-{
- struct msm_gpu *gpu = dev_to_gpu(dev);
-
- if (gpu->funcs->gpu_get_freq)
- *freq = gpu->funcs->gpu_get_freq(gpu);
- else
- *freq = clk_get_rate(gpu->core_clk);
-
- return 0;
-}
-
-static struct devfreq_dev_profile msm_devfreq_profile = {
- .polling_ms = 10,
- .target = msm_devfreq_target,
- .get_dev_status = msm_devfreq_get_dev_status,
- .get_cur_freq = msm_devfreq_get_cur_freq,
-};
-
-static void msm_devfreq_init(struct msm_gpu *gpu)
-{
- /* We need target support to do devfreq */
- if (!gpu->funcs->gpu_busy)
- return;
-
- msm_devfreq_profile.initial_freq = gpu->fast_rate;
-
- /*
- * Don't set the freq_table or max_state and let devfreq build the table
- * from OPP
- * After a deferred probe, these may have be left to non-zero values,
- * so set them back to zero before creating the devfreq device
- */
- msm_devfreq_profile.freq_table = NULL;
- msm_devfreq_profile.max_state = 0;
-
- gpu->devfreq.devfreq = devm_devfreq_add_device(&gpu->pdev->dev,
- &msm_devfreq_profile, DEVFREQ_GOV_SIMPLE_ONDEMAND,
- NULL);
-
- if (IS_ERR(gpu->devfreq.devfreq)) {
- DRM_DEV_ERROR(&gpu->pdev->dev, "Couldn't initialize GPU devfreq\n");
- gpu->devfreq.devfreq = NULL;
- return;
- }
-
- devfreq_suspend_device(gpu->devfreq.devfreq);
-
- gpu->cooling = of_devfreq_cooling_register(gpu->pdev->dev.of_node,
- gpu->devfreq.devfreq);
- if (IS_ERR(gpu->cooling)) {
- DRM_DEV_ERROR(&gpu->pdev->dev,
- "Couldn't register GPU cooling device\n");
- gpu->cooling = NULL;
- }
-}
-
static int enable_pwrrail(struct msm_gpu *gpu)
{
struct drm_device *dev = gpu->dev;
@@ -196,14 +94,6 @@ static int disable_axi(struct msm_gpu *gpu)
return 0;
}
-void msm_gpu_resume_devfreq(struct msm_gpu *gpu)
-{
- gpu->devfreq.busy_cycles = 0;
- gpu->devfreq.time = ktime_get();
-
- devfreq_resume_device(gpu->devfreq.devfreq);
-}
-
int msm_gpu_pm_resume(struct msm_gpu *gpu)
{
int ret;
@@ -223,7 +113,7 @@ int msm_gpu_pm_resume(struct msm_gpu *gpu)
if (ret)
return ret;
- msm_gpu_resume_devfreq(gpu);
+ msm_devfreq_resume(gpu);
gpu->needs_hw_init = true;
@@ -237,7 +127,7 @@ int msm_gpu_pm_suspend(struct msm_gpu *gpu)
DBG("%s", gpu->name);
trace_msm_gpu_suspend(0);
- devfreq_suspend_device(gpu->devfreq.devfreq);
+ msm_devfreq_suspend(gpu);
ret = disable_axi(gpu);
if (ret)
@@ -1116,5 +1006,5 @@ void msm_gpu_cleanup(struct msm_gpu *gpu)
kthread_destroy_worker(gpu->worker);
}
- devfreq_cooling_unregister(gpu->cooling);
+ msm_devfreq_cleanup(gpu);
}
diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h
index ef41ec09f59c..2e61d05293e6 100644
--- a/drivers/gpu/drm/msm/msm_gpu.h
+++ b/drivers/gpu/drm/msm/msm_gpu.h
@@ -80,6 +80,26 @@ struct msm_gpu_fault_info {
const char *block;
};
+/**
+ * struct msm_gpu_devfreq - devfreq related state
+ */
+struct msm_gpu_devfreq {
+ /** devfreq: devfreq instance */
+ struct devfreq *devfreq;
+
+ /**
+ * busy_cycles:
+ *
+ * Used by implementation of gpu->gpu_busy() to track the last
+ * busy counter value, for calculating elapsed busy cycles since
+ * last sampling period.
+ */
+ u64 busy_cycles;
+
+ /** time: Time of last sampling period. */
+ ktime_t time;
+};
+
struct msm_gpu {
const char *name;
struct drm_device *dev;
@@ -151,11 +171,7 @@ struct msm_gpu {
struct drm_gem_object *memptrs_bo;
- struct {
- struct devfreq *devfreq;
- u64 busy_cycles;
- ktime_t time;
- } devfreq;
+ struct msm_gpu_devfreq devfreq;
uint32_t suspend_count;
@@ -301,7 +317,11 @@ static inline void gpu_write64(struct msm_gpu *gpu, u32 lo, u32 hi, u64 val)
int msm_gpu_pm_suspend(struct msm_gpu *gpu);
int msm_gpu_pm_resume(struct msm_gpu *gpu);
-void msm_gpu_resume_devfreq(struct msm_gpu *gpu);
+
+void msm_devfreq_init(struct msm_gpu *gpu);
+void msm_devfreq_cleanup(struct msm_gpu *gpu);
+void msm_devfreq_resume(struct msm_gpu *gpu);
+void msm_devfreq_suspend(struct msm_gpu *gpu);
int msm_gpu_hw_init(struct msm_gpu *gpu);
diff --git a/drivers/gpu/drm/msm/msm_gpu_devfreq.c b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
new file mode 100644
index 000000000000..3bcea0baddab
--- /dev/null
+++ b/drivers/gpu/drm/msm/msm_gpu_devfreq.c
@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2013 Red Hat
+ * Author: Rob Clark <robdclark@...il.com>
+ */
+
+#include "msm_gpu.h"
+#include "msm_gpu_trace.h"
+
+#include <linux/devfreq.h>
+#include <linux/devfreq_cooling.h>
+
+/*
+ * Power Management:
+ */
+
+static int msm_devfreq_target(struct device *dev, unsigned long *freq,
+ u32 flags)
+{
+ struct msm_gpu *gpu = dev_to_gpu(dev);
+ struct dev_pm_opp *opp;
+
+ opp = devfreq_recommended_opp(dev, freq, flags);
+
+ if (IS_ERR(opp))
+ return PTR_ERR(opp);
+
+ trace_msm_gpu_freq_change(dev_pm_opp_get_freq(opp));
+
+ if (gpu->funcs->gpu_set_freq)
+ gpu->funcs->gpu_set_freq(gpu, opp);
+ else
+ clk_set_rate(gpu->core_clk, *freq);
+
+ dev_pm_opp_put(opp);
+
+ return 0;
+}
+
+static int msm_devfreq_get_dev_status(struct device *dev,
+ struct devfreq_dev_status *status)
+{
+ struct msm_gpu *gpu = dev_to_gpu(dev);
+ ktime_t time;
+
+ if (gpu->funcs->gpu_get_freq)
+ status->current_frequency = gpu->funcs->gpu_get_freq(gpu);
+ else
+ status->current_frequency = clk_get_rate(gpu->core_clk);
+
+ status->busy_time = gpu->funcs->gpu_busy(gpu);
+
+ time = ktime_get();
+ status->total_time = ktime_us_delta(time, gpu->devfreq.time);
+ gpu->devfreq.time = time;
+
+ return 0;
+}
+
+static int msm_devfreq_get_cur_freq(struct device *dev, unsigned long *freq)
+{
+ struct msm_gpu *gpu = dev_to_gpu(dev);
+
+ if (gpu->funcs->gpu_get_freq)
+ *freq = gpu->funcs->gpu_get_freq(gpu);
+ else
+ *freq = clk_get_rate(gpu->core_clk);
+
+ return 0;
+}
+
+static struct devfreq_dev_profile msm_devfreq_profile = {
+ .polling_ms = 10,
+ .target = msm_devfreq_target,
+ .get_dev_status = msm_devfreq_get_dev_status,
+ .get_cur_freq = msm_devfreq_get_cur_freq,
+};
+
+void msm_devfreq_init(struct msm_gpu *gpu)
+{
+ /* We need target support to do devfreq */
+ if (!gpu->funcs->gpu_busy)
+ return;
+
+ msm_devfreq_profile.initial_freq = gpu->fast_rate;
+
+ /*
+ * Don't set the freq_table or max_state and let devfreq build the table
+ * from OPP
+ * After a deferred probe, these may have be left to non-zero values,
+ * so set them back to zero before creating the devfreq device
+ */
+ msm_devfreq_profile.freq_table = NULL;
+ msm_devfreq_profile.max_state = 0;
+
+ gpu->devfreq.devfreq = devm_devfreq_add_device(&gpu->pdev->dev,
+ &msm_devfreq_profile, DEVFREQ_GOV_SIMPLE_ONDEMAND,
+ NULL);
+
+ if (IS_ERR(gpu->devfreq.devfreq)) {
+ DRM_DEV_ERROR(&gpu->pdev->dev, "Couldn't initialize GPU devfreq\n");
+ gpu->devfreq.devfreq = NULL;
+ return;
+ }
+
+ devfreq_suspend_device(gpu->devfreq.devfreq);
+
+ gpu->cooling = of_devfreq_cooling_register(gpu->pdev->dev.of_node,
+ gpu->devfreq.devfreq);
+ if (IS_ERR(gpu->cooling)) {
+ DRM_DEV_ERROR(&gpu->pdev->dev,
+ "Couldn't register GPU cooling device\n");
+ gpu->cooling = NULL;
+ }
+}
+
+void msm_devfreq_cleanup(struct msm_gpu *gpu)
+{
+ devfreq_cooling_unregister(gpu->cooling);
+}
+
+void msm_devfreq_resume(struct msm_gpu *gpu)
+{
+ gpu->devfreq.busy_cycles = 0;
+ gpu->devfreq.time = ktime_get();
+
+ devfreq_resume_device(gpu->devfreq.devfreq);
+}
+
+void msm_devfreq_suspend(struct msm_gpu *gpu)
+{
+ devfreq_suspend_device(gpu->devfreq.devfreq);
+}
--
2.31.1
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