[PATCH v5 1/5] drm/msm/dpu: simplify clocks handling
Dmitry Baryshkov
dmitry.baryshkov at linaro.org
Thu Feb 17 05:55:25 UTC 2022
DPU driver contains code to parse clock items from device tree into
special data struct and then enable/disable/set rate for the clocks
using that data struct. However the DPU driver itself uses only parsing
and enabling/disabling part (the rate setting is used by DP driver).
Move this implementation to the DP driver (which actually uses rate
setting) and replace hand-coded enable/disable/get loops in the DPU
with the respective clk_bulk operations. Put operation is removed
completely because, it is handled using devres instead.
DP implementation is unchanged for now.
Tested-by: Jessica Zhang <quic_jesszhan at quicinc.com> # RB3 (sdm845) and RB5 (qrb5165)
Reviewed-by: Jessica Zhang <quic_jesszhan at quicinc.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
drivers/gpu/drm/msm/Makefile | 2 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c | 23 ++-----
drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h | 6 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 46 +++----------
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h | 4 +-
drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c | 26 +++----
.../dpu1/dpu_io_util.c => dp/dp_clk_util.c} | 69 +------------------
.../dpu1/dpu_io_util.h => dp/dp_clk_util.h} | 8 +--
drivers/gpu/drm/msm/dp/dp_parser.h | 2 +-
9 files changed, 36 insertions(+), 150 deletions(-)
rename drivers/gpu/drm/msm/{disp/dpu1/dpu_io_util.c => dp/dp_clk_util.c} (61%)
rename drivers/gpu/drm/msm/{disp/dpu1/dpu_io_util.h => dp/dp_clk_util.h} (85%)
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile
index 03ab55c37beb..a44abf0a7660 100644
--- a/drivers/gpu/drm/msm/Makefile
+++ b/drivers/gpu/drm/msm/Makefile
@@ -66,7 +66,6 @@ msm-y := \
disp/dpu1/dpu_hw_top.o \
disp/dpu1/dpu_hw_util.o \
disp/dpu1/dpu_hw_vbif.o \
- disp/dpu1/dpu_io_util.o \
disp/dpu1/dpu_kms.o \
disp/dpu1/dpu_mdss.o \
disp/dpu1/dpu_plane.o \
@@ -102,6 +101,7 @@ msm-$(CONFIG_DRM_MSM_GPU_STATE) += adreno/a6xx_gpu_state.o
msm-$(CONFIG_DRM_MSM_DP)+= dp/dp_aux.o \
dp/dp_catalog.o \
+ dp/dp_clk_util.o \
dp/dp_ctrl.o \
dp/dp_display.o \
dp/dp_drm.o \
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 60fe06018581..a7492dd6ed65 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
@@ -284,17 +284,6 @@ void dpu_core_perf_crtc_release_bw(struct drm_crtc *crtc)
}
}
-static int _dpu_core_perf_set_core_clk_rate(struct dpu_kms *kms, u64 rate)
-{
- struct dss_clk *core_clk = kms->perf.core_clk;
-
- if (core_clk->max_rate && (rate > core_clk->max_rate))
- rate = core_clk->max_rate;
-
- core_clk->rate = rate;
- 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)
{
u64 clk_rate = kms->perf.perf_tune.min_core_clk;
@@ -306,7 +295,7 @@ static u64 _dpu_core_perf_get_core_clk_rate(struct dpu_kms *kms)
dpu_cstate = to_dpu_crtc_state(crtc->state);
clk_rate = max(dpu_cstate->new_perf.core_clk_rate,
clk_rate);
- clk_rate = clk_round_rate(kms->perf.core_clk->clk,
+ clk_rate = clk_round_rate(kms->perf.core_clk,
clk_rate);
}
}
@@ -405,10 +394,10 @@ int dpu_core_perf_crtc_update(struct drm_crtc *crtc,
trace_dpu_core_perf_update_clk(kms->dev, stop_req, clk_rate);
- ret = _dpu_core_perf_set_core_clk_rate(kms, clk_rate);
+ clk_rate = min(clk_rate, kms->perf.max_core_clk_rate);
+ ret = dev_pm_opp_set_rate(&kms->pdev->dev, clk_rate);
if (ret) {
- DPU_ERROR("failed to set %s clock rate %llu\n",
- kms->perf.core_clk->clk_name, clk_rate);
+ DPU_ERROR("failed to set core clock rate %llu\n", clk_rate);
return ret;
}
@@ -529,13 +518,13 @@ void dpu_core_perf_destroy(struct dpu_core_perf *perf)
int dpu_core_perf_init(struct dpu_core_perf *perf,
struct drm_device *dev,
struct dpu_mdss_cfg *catalog,
- struct dss_clk *core_clk)
+ struct clk *core_clk)
{
perf->dev = dev;
perf->catalog = catalog;
perf->core_clk = core_clk;
- perf->max_core_clk_rate = core_clk->max_rate;
+ perf->max_core_clk_rate = clk_get_rate(core_clk);
if (!perf->max_core_clk_rate) {
DPU_DEBUG("optional max core clk rate, use default\n");
perf->max_core_clk_rate = DPU_PERF_DEFAULT_MAX_CORE_CLK_RATE;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h
index cf4b9b5964c6..8dfcc6db7176 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h
@@ -56,7 +56,7 @@ struct dpu_core_perf_tune {
* @dev: Pointer to drm device
* @debugfs_root: top level debug folder
* @catalog: Pointer to catalog configuration
- * @core_clk: Pointer to core clock structure
+ * @core_clk: Pointer to the core clock
* @core_clk_rate: current core clock rate
* @max_core_clk_rate: maximum allowable core clock rate
* @perf_tune: debug control for performance tuning
@@ -69,7 +69,7 @@ struct dpu_core_perf {
struct drm_device *dev;
struct dentry *debugfs_root;
struct dpu_mdss_cfg *catalog;
- struct dss_clk *core_clk;
+ struct clk *core_clk;
u64 core_clk_rate;
u64 max_core_clk_rate;
struct dpu_core_perf_tune perf_tune;
@@ -120,7 +120,7 @@ void dpu_core_perf_destroy(struct dpu_core_perf *perf);
int dpu_core_perf_init(struct dpu_core_perf *perf,
struct drm_device *dev,
struct dpu_mdss_cfg *catalog,
- struct dss_clk *core_clk);
+ struct clk *core_clk);
struct dpu_kms;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 47fe11a84a77..9059c6d3631a 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -998,29 +998,15 @@ static int _dpu_kms_mmu_init(struct dpu_kms *dpu_kms)
return 0;
}
-static struct dss_clk *_dpu_kms_get_clk(struct dpu_kms *dpu_kms,
- char *clock_name)
-{
- struct dss_module_power *mp = &dpu_kms->mp;
- int i;
-
- for (i = 0; i < mp->num_clk; i++) {
- if (!strcmp(mp->clk_config[i].clk_name, clock_name))
- return &mp->clk_config[i];
- }
-
- return NULL;
-}
-
u64 dpu_kms_get_clk_rate(struct dpu_kms *dpu_kms, char *clock_name)
{
- struct dss_clk *clk;
+ struct clk *clk;
- clk = _dpu_kms_get_clk(dpu_kms, clock_name);
+ clk = msm_clk_bulk_get_clock(dpu_kms->clocks, dpu_kms->num_clocks, clock_name);
if (!clk)
return -EINVAL;
- return clk_get_rate(clk->clk);
+ return clk_get_rate(clk);
}
static int dpu_kms_hw_init(struct msm_kms *kms)
@@ -1132,7 +1118,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
}
rc = dpu_core_perf_init(&dpu_kms->perf, dev, dpu_kms->catalog,
- _dpu_kms_get_clk(dpu_kms, "core"));
+ msm_clk_bulk_get_clock(dpu_kms->clocks, dpu_kms->num_clocks, "core"));
if (rc) {
DPU_ERROR("failed to init perf %d\n", rc);
goto perf_err;
@@ -1219,7 +1205,6 @@ static int dpu_bind(struct device *dev, struct device *master, void *data)
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *ddev = priv->dev;
struct dpu_kms *dpu_kms;
- struct dss_module_power *mp;
int ret = 0;
dpu_kms = devm_kzalloc(&pdev->dev, sizeof(*dpu_kms), GFP_KERNEL);
@@ -1236,12 +1221,12 @@ static int dpu_bind(struct device *dev, struct device *master, void *data)
return ret;
}
- mp = &dpu_kms->mp;
- ret = msm_dss_parse_clock(pdev, mp);
- if (ret) {
+ ret = devm_clk_bulk_get_all(&pdev->dev, &dpu_kms->clocks);
+ if (ret < 0) {
DPU_ERROR("failed to parse clocks, ret=%d\n", ret);
return ret;
}
+ dpu_kms->num_clocks = ret;
platform_set_drvdata(pdev, dpu_kms);
@@ -1265,11 +1250,6 @@ static void dpu_unbind(struct device *dev, struct device *master, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct dpu_kms *dpu_kms = platform_get_drvdata(pdev);
- struct dss_module_power *mp = &dpu_kms->mp;
-
- msm_dss_put_clk(mp->clk_config, mp->num_clk);
- devm_kfree(&pdev->dev, mp->clk_config);
- mp->num_clk = 0;
if (dpu_kms->rpm_enabled)
pm_runtime_disable(&pdev->dev);
@@ -1293,21 +1273,18 @@ static int dpu_dev_remove(struct platform_device *pdev)
static int __maybe_unused dpu_runtime_suspend(struct device *dev)
{
- int i, rc = -1;
+ int i;
struct platform_device *pdev = to_platform_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);
+ clk_bulk_disable_unprepare(dpu_kms->num_clocks, dpu_kms->clocks);
for (i = 0; i < dpu_kms->num_paths; i++)
icc_set_bw(dpu_kms->path[i], 0, 0);
- return rc;
+ return 0;
}
static int __maybe_unused dpu_runtime_resume(struct device *dev)
@@ -1317,7 +1294,6 @@ static int __maybe_unused dpu_runtime_resume(struct device *dev)
struct dpu_kms *dpu_kms = platform_get_drvdata(pdev);
struct drm_encoder *encoder;
struct drm_device *ddev;
- struct dss_module_power *mp = &dpu_kms->mp;
int i;
ddev = dpu_kms->dev;
@@ -1327,7 +1303,7 @@ static int __maybe_unused dpu_runtime_resume(struct device *dev)
for (i = 0; i < dpu_kms->num_paths; i++)
icc_set_bw(dpu_kms->path[i], 0, Bps_to_icc(MIN_IB_BW));
- rc = msm_dss_enable_clk(mp->clk_config, mp->num_clk, true);
+ rc = clk_bulk_prepare_enable(dpu_kms->num_clocks, dpu_kms->clocks);
if (rc) {
DPU_ERROR("clock enable failed rc:%d\n", rc);
return rc;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
index 2d385b4b7f5e..26984bf8b8c7 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.h
@@ -21,7 +21,6 @@
#include "dpu_hw_lm.h"
#include "dpu_hw_interrupts.h"
#include "dpu_hw_top.h"
-#include "dpu_io_util.h"
#include "dpu_rm.h"
#include "dpu_core_perf.h"
@@ -113,7 +112,8 @@ struct dpu_kms {
struct platform_device *pdev;
bool rpm_enabled;
- struct dss_module_power mp;
+ struct clk_bulk_data *clocks;
+ size_t num_clocks;
/* reference count bandwidth requests, so we know when we can
* release bandwidth. Each atomic update increments, and frame-
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
index 131c1f1a869c..25b0fe67ea9c 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
@@ -29,7 +29,8 @@ struct dpu_irq_controller {
struct dpu_mdss {
struct msm_mdss base;
void __iomem *mmio;
- struct dss_module_power mp;
+ struct clk_bulk_data *clocks;
+ size_t num_clocks;
struct dpu_irq_controller irq_controller;
};
@@ -136,10 +137,9 @@ static void _dpu_mdss_irq_domain_fini(struct dpu_mdss *dpu_mdss)
static int dpu_mdss_enable(struct msm_mdss *mdss)
{
struct dpu_mdss *dpu_mdss = to_dpu_mdss(mdss);
- struct dss_module_power *mp = &dpu_mdss->mp;
int ret;
- ret = msm_dss_enable_clk(mp->clk_config, mp->num_clk, true);
+ ret = clk_bulk_prepare_enable(dpu_mdss->num_clocks, dpu_mdss->clocks);
if (ret) {
DPU_ERROR("clock enable failed, ret:%d\n", ret);
return ret;
@@ -174,21 +174,16 @@ static int dpu_mdss_enable(struct msm_mdss *mdss)
static int dpu_mdss_disable(struct msm_mdss *mdss)
{
struct dpu_mdss *dpu_mdss = to_dpu_mdss(mdss);
- struct dss_module_power *mp = &dpu_mdss->mp;
- int ret;
- ret = msm_dss_enable_clk(mp->clk_config, mp->num_clk, false);
- if (ret)
- DPU_ERROR("clock disable failed, ret:%d\n", ret);
+ clk_bulk_disable_unprepare(dpu_mdss->num_clocks, dpu_mdss->clocks);
- return ret;
+ return 0;
}
static void dpu_mdss_destroy(struct msm_mdss *mdss)
{
struct platform_device *pdev = to_platform_device(mdss->dev);
struct dpu_mdss *dpu_mdss = to_dpu_mdss(mdss);
- struct dss_module_power *mp = &dpu_mdss->mp;
int irq;
pm_runtime_suspend(mdss->dev);
@@ -196,8 +191,6 @@ static void dpu_mdss_destroy(struct msm_mdss *mdss)
_dpu_mdss_irq_domain_fini(dpu_mdss);
irq = platform_get_irq(pdev, 0);
irq_set_chained_handler_and_data(irq, NULL, NULL);
- msm_dss_put_clk(mp->clk_config, mp->num_clk);
- devm_kfree(&pdev->dev, mp->clk_config);
if (dpu_mdss->mmio)
devm_iounmap(&pdev->dev, dpu_mdss->mmio);
@@ -214,7 +207,6 @@ int dpu_mdss_init(struct platform_device *pdev)
{
struct msm_drm_private *priv = platform_get_drvdata(pdev);
struct dpu_mdss *dpu_mdss;
- struct dss_module_power *mp;
int ret;
int irq;
@@ -228,12 +220,12 @@ int dpu_mdss_init(struct platform_device *pdev)
DRM_DEBUG("mapped mdss address space @%pK\n", dpu_mdss->mmio);
- mp = &dpu_mdss->mp;
- ret = msm_dss_parse_clock(pdev, mp);
- if (ret) {
+ ret = devm_clk_bulk_get_all(&pdev->dev, &dpu_mdss->clocks);
+ if (ret < 0) {
DPU_ERROR("failed to parse clocks, ret=%d\n", ret);
goto clk_parse_err;
}
+ dpu_mdss->num_clocks = ret;
dpu_mdss->base.dev = &pdev->dev;
dpu_mdss->base.funcs = &mdss_funcs;
@@ -260,9 +252,7 @@ int dpu_mdss_init(struct platform_device *pdev)
irq_error:
_dpu_mdss_irq_domain_fini(dpu_mdss);
irq_domain_error:
- msm_dss_put_clk(mp->clk_config, mp->num_clk);
clk_parse_err:
- devm_kfree(&pdev->dev, mp->clk_config);
if (dpu_mdss->mmio)
devm_iounmap(&pdev->dev, dpu_mdss->mmio);
dpu_mdss->mmio = NULL;
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_io_util.c b/drivers/gpu/drm/msm/dp/dp_clk_util.c
similarity index 61%
rename from drivers/gpu/drm/msm/disp/dpu1/dpu_io_util.c
rename to drivers/gpu/drm/msm/dp/dp_clk_util.c
index 078afc5f5882..44a4fc59ff31 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_io_util.c
+++ b/drivers/gpu/drm/msm/dp/dp_clk_util.c
@@ -11,7 +11,7 @@
#include <drm/drm_print.h>
-#include "dpu_io_util.h"
+#include "dp_clk_util.h"
void msm_dss_put_clk(struct dss_clk *clk_arry, int num_clk)
{
@@ -118,70 +118,3 @@ int msm_dss_enable_clk(struct dss_clk *clk_arry, int num_clk, int enable)
return rc;
}
-
-int msm_dss_parse_clock(struct platform_device *pdev,
- struct dss_module_power *mp)
-{
- u32 i, rc = 0;
- const char *clock_name;
- int num_clk = 0;
-
- if (!pdev || !mp)
- return -EINVAL;
-
- mp->num_clk = 0;
- num_clk = of_property_count_strings(pdev->dev.of_node, "clock-names");
- if (num_clk <= 0) {
- pr_debug("clocks are not defined\n");
- return 0;
- }
-
- mp->clk_config = devm_kcalloc(&pdev->dev,
- num_clk, sizeof(struct dss_clk),
- GFP_KERNEL);
- if (!mp->clk_config)
- return -ENOMEM;
-
- for (i = 0; i < num_clk; i++) {
- rc = of_property_read_string_index(pdev->dev.of_node,
- "clock-names", i,
- &clock_name);
- if (rc) {
- DRM_DEV_ERROR(&pdev->dev, "Failed to get clock name for %d\n",
- i);
- break;
- }
- strlcpy(mp->clk_config[i].clk_name, clock_name,
- sizeof(mp->clk_config[i].clk_name));
-
- mp->clk_config[i].type = DSS_CLK_AHB;
- }
-
- rc = msm_dss_get_clk(&pdev->dev, mp->clk_config, num_clk);
- if (rc) {
- DRM_DEV_ERROR(&pdev->dev, "Failed to get clock refs %d\n", rc);
- goto err;
- }
-
- rc = of_clk_set_defaults(pdev->dev.of_node, false);
- if (rc) {
- DRM_DEV_ERROR(&pdev->dev, "Failed to set clock defaults %d\n", rc);
- goto err;
- }
-
- for (i = 0; i < num_clk; i++) {
- u32 rate = clk_get_rate(mp->clk_config[i].clk);
- if (!rate)
- continue;
- mp->clk_config[i].rate = rate;
- mp->clk_config[i].type = DSS_CLK_PCLK;
- mp->clk_config[i].max_rate = rate;
- }
-
- mp->num_clk = num_clk;
- return 0;
-
-err:
- msm_dss_put_clk(mp->clk_config, num_clk);
- return rc;
-}
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_io_util.h b/drivers/gpu/drm/msm/dp/dp_clk_util.h
similarity index 85%
rename from drivers/gpu/drm/msm/disp/dpu1/dpu_io_util.h
rename to drivers/gpu/drm/msm/dp/dp_clk_util.h
index e6b5c772fa3b..067bf87f3d97 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_io_util.h
+++ b/drivers/gpu/drm/msm/dp/dp_clk_util.h
@@ -2,8 +2,8 @@
/* Copyright (c) 2012, 2017-2018, The Linux Foundation. All rights reserved.
*/
-#ifndef __DPU_IO_UTIL_H__
-#define __DPU_IO_UTIL_H__
+#ifndef __DP_CLK_UTIL_H__
+#define __DP_CLK_UTIL_H__
#include <linux/platform_device.h>
#include <linux/types.h>
@@ -35,6 +35,4 @@ int msm_dss_get_clk(struct device *dev, struct dss_clk *clk_arry, int num_clk);
void msm_dss_put_clk(struct dss_clk *clk_arry, int num_clk);
int msm_dss_clk_set_rate(struct dss_clk *clk_arry, int num_clk);
int msm_dss_enable_clk(struct dss_clk *clk_arry, int num_clk, int enable);
-int msm_dss_parse_clock(struct platform_device *pdev,
- struct dss_module_power *mp);
-#endif /* __DPU_IO_UTIL_H__ */
+#endif /* __DP_CLK_UTIL_H__ */
diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h b/drivers/gpu/drm/msm/dp/dp_parser.h
index 3172da089421..094b39bfed8c 100644
--- a/drivers/gpu/drm/msm/dp/dp_parser.h
+++ b/drivers/gpu/drm/msm/dp/dp_parser.h
@@ -10,7 +10,7 @@
#include <linux/phy/phy.h>
#include <linux/phy/phy-dp.h>
-#include "dpu_io_util.h"
+#include "dp_clk_util.h"
#include "msm_drv.h"
#define DP_LABEL "MDSS DP DISPLAY"
--
2.34.1
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