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From: Ulf Hansson <ulf.hansson@linaro.org>
To: "Rafael J . Wysocki" <rafael@kernel.org>,
	linux-pm@vger.kernel.org
Cc: Ulf Hansson <ulf.hansson@linaro.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Viresh Kumar <viresh.kumar@linaro.org>,
	Sudeep Holla <sudeep.holla@arm.com>,
	Kevin Hilman <khilman@kernel.org>,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	Bjorn Andersson <andersson@kernel.org>,
	Nikunj Kela <nkela@quicinc.com>,
	Prasad Sodagudi <psodagud@quicinc.com>,
	Stephan Gerhold <stephan@gerhold.net>,
	Ben Horgan <Ben.Horgan@arm.com>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-remoteproc@vger.kernel.org,
	linux-media@vger.kernel.org,
	Mauro Carvalho Chehab <mchehab@kernel.org>,
	Stanimir Varbanov <stanimir.k.varbanov@gmail.com>,
	Vikash Garodia <quic_vgarodia@quicinc.com>,
	Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Subject: [PATCH v3 5/5] media: venus: Convert to dev_pm_domain_attach|detach_list() for vcodec
Date: Tue, 30 Jan 2024 13:39:51 +0100
Message-Id: <20240130123951.236243-6-ulf.hansson@linaro.org>
In-Reply-To: <20240130123951.236243-1-ulf.hansson@linaro.org>
References: <20240130123951.236243-1-ulf.hansson@linaro.org>
Precedence: bulk
MIME-Version: 1.0
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Let's avoid some of the boilerplate code to manage the vcodec PM domains,
by converting into using dev_pm_domain_attach|detach_list().

Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Stanimir Varbanov <stanimir.k.varbanov@gmail.com>
Cc: Vikash Garodia <quic_vgarodia@quicinc.com>
Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Konrad Dybcio <konrad.dybcio@linaro.org>
Cc: <linux-media@vger.kernel.org>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

Changes in v3:
	- None.

Changes in v2:
	- Added reviewed-by and tested-by tags.

---
 drivers/media/platform/qcom/venus/core.c      | 12 +++--
 drivers/media/platform/qcom/venus/core.h      |  7 ++-
 .../media/platform/qcom/venus/pm_helpers.c    | 48 +++++++------------
 3 files changed, 26 insertions(+), 41 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index a712dd4f02a5..ce206b709754 100644
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -16,6 +16,7 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/types.h>
+#include <linux/pm_domain.h>
 #include <linux/pm_runtime.h>
 #include <media/videobuf2-v4l2.h>
 #include <media/v4l2-mem2mem.h>
@@ -114,7 +115,8 @@ static void venus_sys_error_handler(struct work_struct *work)
 	pm_runtime_put_sync(core->dev);
 
 	for (i = 0; i < max_attempts; i++) {
-		if (!core->pmdomains[0] || !pm_runtime_active(core->pmdomains[0]))
+		if (!core->pmdomains ||
+		    !pm_runtime_active(core->pmdomains->pd_devs[0]))
 			break;
 		usleep_range(1000, 1500);
 	}
@@ -705,7 +707,7 @@ static const struct venus_resources sdm845_res_v2 = {
 	.vcodec0_clks = { "vcodec0_core", "vcodec0_bus" },
 	.vcodec1_clks = { "vcodec1_core", "vcodec1_bus" },
 	.vcodec_clks_num = 2,
-	.vcodec_pmdomains = { "venus", "vcodec0", "vcodec1" },
+	.vcodec_pmdomains = (const char *[]) { "venus", "vcodec0", "vcodec1" },
 	.vcodec_pmdomains_num = 3,
 	.opp_pmdomain = (const char *[]) { "cx", NULL },
 	.vcodec_num = 2,
@@ -754,7 +756,7 @@ static const struct venus_resources sc7180_res = {
 	.clks_num = 3,
 	.vcodec0_clks = { "vcodec0_core", "vcodec0_bus" },
 	.vcodec_clks_num = 2,
-	.vcodec_pmdomains = { "venus", "vcodec0" },
+	.vcodec_pmdomains = (const char *[]) { "venus", "vcodec0" },
 	.vcodec_pmdomains_num = 2,
 	.opp_pmdomain = (const char *[]) { "cx", NULL },
 	.vcodec_num = 1,
@@ -811,7 +813,7 @@ static const struct venus_resources sm8250_res = {
 	.resets_num = 2,
 	.vcodec0_clks = { "vcodec0_core" },
 	.vcodec_clks_num = 1,
-	.vcodec_pmdomains = { "venus", "vcodec0" },
+	.vcodec_pmdomains = (const char *[]) { "venus", "vcodec0" },
 	.vcodec_pmdomains_num = 2,
 	.opp_pmdomain = (const char *[]) { "mx", NULL },
 	.vcodec_num = 1,
@@ -870,7 +872,7 @@ static const struct venus_resources sc7280_res = {
 	.clks_num = 3,
 	.vcodec0_clks = {"vcodec_core", "vcodec_bus"},
 	.vcodec_clks_num = 2,
-	.vcodec_pmdomains = { "venus", "vcodec0" },
+	.vcodec_pmdomains = (const char *[]) { "venus", "vcodec0" },
 	.vcodec_pmdomains_num = 2,
 	.opp_pmdomain = (const char *[]) { "cx", NULL },
 	.vcodec_num = 1,
diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 4a633261ece4..7ef341bf21cc 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -25,7 +25,6 @@
 
 #define VIDC_CLKS_NUM_MAX		4
 #define VIDC_VCODEC_CLKS_NUM_MAX	2
-#define VIDC_PMDOMAINS_NUM_MAX		3
 #define VIDC_RESETS_NUM_MAX		2
 
 extern int venus_fw_debug;
@@ -72,7 +71,7 @@ struct venus_resources {
 	const char * const vcodec0_clks[VIDC_VCODEC_CLKS_NUM_MAX];
 	const char * const vcodec1_clks[VIDC_VCODEC_CLKS_NUM_MAX];
 	unsigned int vcodec_clks_num;
-	const char * const vcodec_pmdomains[VIDC_PMDOMAINS_NUM_MAX];
+	const char **vcodec_pmdomains;
 	unsigned int vcodec_pmdomains_num;
 	const char **opp_pmdomain;
 	unsigned int vcodec_num;
@@ -134,7 +133,7 @@ struct venus_format {
  * @video_path: an interconnect handle to video to/from memory path
  * @cpucfg_path: an interconnect handle to cpu configuration path
  * @has_opp_table: does OPP table exist
- * @pmdomains:	an array of pmdomains struct device pointers
+ * @pmdomains:	a pointer to a list of pmdomains
  * @opp_dl_venus: an device-link for device OPP
  * @opp_pmdomain: an OPP power-domain
  * @resets: an array of reset signals
@@ -187,7 +186,7 @@ struct venus_core {
 	struct icc_path *video_path;
 	struct icc_path *cpucfg_path;
 	bool has_opp_table;
-	struct device *pmdomains[VIDC_PMDOMAINS_NUM_MAX];
+	struct dev_pm_domain_list *pmdomains;
 	struct device_link *opp_dl_venus;
 	struct device *opp_pmdomain;
 	struct reset_control *resets[VIDC_RESETS_NUM_MAX];
diff --git a/drivers/media/platform/qcom/venus/pm_helpers.c b/drivers/media/platform/qcom/venus/pm_helpers.c
index a1b127caa90a..502822059498 100644
--- a/drivers/media/platform/qcom/venus/pm_helpers.c
+++ b/drivers/media/platform/qcom/venus/pm_helpers.c
@@ -455,7 +455,7 @@ static int poweroff_coreid(struct venus_core *core, unsigned int coreid_mask)
 		if (ret)
 			return ret;
 
-		ret = pm_runtime_put_sync(core->pmdomains[1]);
+		ret = pm_runtime_put_sync(core->pmdomains->pd_devs[1]);
 		if (ret < 0)
 			return ret;
 	}
@@ -471,7 +471,7 @@ static int poweroff_coreid(struct venus_core *core, unsigned int coreid_mask)
 		if (ret)
 			return ret;
 
-		ret = pm_runtime_put_sync(core->pmdomains[2]);
+		ret = pm_runtime_put_sync(core->pmdomains->pd_devs[2]);
 		if (ret < 0)
 			return ret;
 	}
@@ -484,7 +484,7 @@ static int poweron_coreid(struct venus_core *core, unsigned int coreid_mask)
 	int ret;
 
 	if (coreid_mask & VIDC_CORE_ID_1) {
-		ret = pm_runtime_get_sync(core->pmdomains[1]);
+		ret = pm_runtime_get_sync(core->pmdomains->pd_devs[1]);
 		if (ret < 0)
 			return ret;
 
@@ -502,7 +502,7 @@ static int poweron_coreid(struct venus_core *core, unsigned int coreid_mask)
 	}
 
 	if (coreid_mask & VIDC_CORE_ID_2) {
-		ret = pm_runtime_get_sync(core->pmdomains[2]);
+		ret = pm_runtime_get_sync(core->pmdomains->pd_devs[2]);
 		if (ret < 0)
 			return ret;
 
@@ -860,19 +860,18 @@ static int vcodec_domains_get(struct venus_core *core)
 	struct device **opp_virt_dev;
 	struct device *dev = core->dev;
 	const struct venus_resources *res = core->res;
-	struct device *pd;
-	unsigned int i;
+	struct dev_pm_domain_attach_data vcodec_data = {
+		.pd_names = res->vcodec_pmdomains,
+		.num_pd_names = res->vcodec_pmdomains_num,
+		.pd_flags = PD_FLAG_NO_DEV_LINK,
+	};
 
 	if (!res->vcodec_pmdomains_num)
 		goto skip_pmdomains;
 
-	for (i = 0; i < res->vcodec_pmdomains_num; i++) {
-		pd = dev_pm_domain_attach_by_name(dev,
-						  res->vcodec_pmdomains[i]);
-		if (IS_ERR_OR_NULL(pd))
-			return pd ? PTR_ERR(pd) : -ENODATA;
-		core->pmdomains[i] = pd;
-	}
+	ret = dev_pm_domain_attach_list(dev, &vcodec_data, &core->pmdomains);
+	if (ret < 0)
+		return ret;
 
 skip_pmdomains:
 	if (!core->res->opp_pmdomain)
@@ -896,30 +895,14 @@ static int vcodec_domains_get(struct venus_core *core)
 	return 0;
 
 opp_attach_err:
-	for (i = 0; i < res->vcodec_pmdomains_num; i++) {
-		if (IS_ERR_OR_NULL(core->pmdomains[i]))
-			continue;
-		dev_pm_domain_detach(core->pmdomains[i], true);
-	}
-
+	dev_pm_domain_detach_list(core->pmdomains);
 	return ret;
 }
 
 static void vcodec_domains_put(struct venus_core *core)
 {
-	const struct venus_resources *res = core->res;
-	unsigned int i;
+	dev_pm_domain_detach_list(core->pmdomains);
 
-	if (!res->vcodec_pmdomains_num)
-		goto skip_pmdomains;
-
-	for (i = 0; i < res->vcodec_pmdomains_num; i++) {
-		if (IS_ERR_OR_NULL(core->pmdomains[i]))
-			continue;
-		dev_pm_domain_detach(core->pmdomains[i], true);
-	}
-
-skip_pmdomains:
 	if (!core->has_opp_table)
 		return;
 
@@ -1035,7 +1018,8 @@ static void core_put_v4(struct venus_core *core)
 static int core_power_v4(struct venus_core *core, int on)
 {
 	struct device *dev = core->dev;
-	struct device *pmctrl = core->pmdomains[0];
+	struct device *pmctrl = core->pmdomains ?
+			core->pmdomains->pd_devs[0] : NULL;
 	int ret = 0;
 
 	if (on == POWER_ON) {
-- 
2.34.1