[PATCH v2 4/5] remoteproc: qcom_q6v5_adsp: Convert to dev_pm_domain_attach|detach_list()

Ulf Hansson
2024-01-05T16:01:24Z

Let's avoid some of the boilerplate code to manage the various PM domain
cases, by converting into using dev_pm_domain_attach|detach_list().

As a part of the conversion, we are moving over to use device_links, which
simplifies the runtime PM support too. Moreover, while attaching let's
trust that an already attached single PM domain is the correct one.

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Konrad Dybcio <konrad.dybcio@linaro.org>
Cc: <linux-remoteproc@vger.kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

Changes in v2:
- None.

Kind regards
Ulf Hansson
---
drivers/remoteproc/qcom_q6v5_adsp.c | 160 +++++++++++++---------------
1 file changed, 73 insertions(+), 87 deletions(-)

diff --git a/drivers/remoteproc/qcom_q6v5_adsp.c b/drivers/remoteproc/qcom_q6v5_adsp.c
index 6c67514cc493..93f9a1537ec6 100644
--- a/drivers/remoteproc/qcom_q6v5_adsp.c
+++ b/drivers/remoteproc/qcom_q6v5_adsp.c
@@ -55,8 +55,6 @@
#define QDSP6SS_CORE_CBCR 0x20
#define QDSP6SS_SLEEP_CBCR 0x3c

-#define QCOM_Q6V5_RPROC_PROXY_PD_MAX 3
-
#define LPASS_BOOT_CORE_START BIT(0)
#define LPASS_BOOT_CMD_START BIT(0)
#define LPASS_EFUSE_Q6SS_EVB_SEL 0x0
@@ -74,7 +72,8 @@ struct adsp_pil_data {

const char **clk_ids;
int num_clks;
- const char **proxy_pd_names;
+ const char **pd_names;
+ unsigned int num_pds;
const char *load_state;
};

@@ -110,8 +109,7 @@ struct qcom_adsp {
size_t mem_size;
bool has_iommu;

- struct device *proxy_pds[QCOM_Q6V5_RPROC_PROXY_PD_MAX];
- size_t proxy_pd_count;
+ struct dev_pm_domain_list *pd_list;

struct qcom_rproc_glink glink_subdev;
struct qcom_rproc_ssr ssr_subdev;
@@ -120,98 +118,92 @@ struct qcom_adsp {
int (*shutdown)(struct qcom_adsp *adsp);
};

-static int qcom_rproc_pds_attach(struct device *dev, struct qcom_adsp *adsp,
- const char **pd_names)
+static int qcom_rproc_pds_attach(struct qcom_adsp *adsp, const char **pd_names,
+ unsigned int num_pds)
{
- struct device **devs = adsp->proxy_pds;
- size_t num_pds = 0;
+ struct device *dev = adsp->dev;
+ struct dev_pm_domain_attach_data pd_data = {
+ .pd_names = pd_names,
+ .num_pd_names = num_pds,
+ };
int ret;
- int i;
-
- if (!pd_names)
- return 0;

/* Handle single power domain */
- if (dev->pm_domain) {
- devs[0] = dev;
- pm_runtime_enable(dev);
- return 1;
- }
+ if (dev->pm_domain)
+ goto out;

- while (pd_names[num_pds])
- num_pds++;
+ if (!pd_names)
+ return 0;

- if (num_pds > ARRAY_SIZE(adsp->proxy_pds))
- return -E2BIG;
+ ret = dev_pm_domain_attach_list(dev, &pd_data, &adsp->pd_list);
+ if (ret < 0)
+ return ret;

- for (i = 0; i < num_pds; i++) {
- devs[i] = dev_pm_domain_attach_by_name(dev, pd_names[i]);
- if (IS_ERR_OR_NULL(devs[i])) {
- ret = PTR_ERR(devs[i]) ? : -ENODATA;
- goto unroll_attach;
- }
- }
+out:
+ pm_runtime_enable(dev);
+ return 0;
+}

- return num_pds;
+static void qcom_rproc_pds_detach(struct qcom_adsp *adsp)
+{
+ struct device *dev = adsp->dev;
+ struct dev_pm_domain_list *pds = adsp->pd_list;

-unroll_attach:
- for (i--; i >= 0; i--)
- dev_pm_domain_detach(devs[i], false);
+ dev_pm_domain_detach_list(pds);

- return ret;
+ if (dev->pm_domain || pds)
+ pm_runtime_disable(adsp->dev);
}

-static void qcom_rproc_pds_detach(struct qcom_adsp *adsp, struct device **pds,
- size_t pd_count)
+static int qcom_rproc_pds_enable(struct qcom_adsp *adsp)
{
struct device *dev = adsp->dev;
- int i;
+ struct dev_pm_domain_list *pds = adsp->pd_list;
+ int ret, i = 0;

- /* Handle single power domain */
- if (dev->pm_domain && pd_count) {
- pm_runtime_disable(dev);
- return;
- }
+ if (!dev->pm_domain && !pds)
+ return 0;

- for (i = 0; i < pd_count; i++)
- dev_pm_domain_detach(pds[i], false);
-}
+ if (dev->pm_domain)
+ dev_pm_genpd_set_performance_state(dev, INT_MAX);

-static int qcom_rproc_pds_enable(struct qcom_adsp *adsp, struct device **pds,
- size_t pd_count)
-{
- int ret;
- int i;
-
- for (i = 0; i < pd_count; i++) {
- dev_pm_genpd_set_performance_state(pds[i], INT_MAX);
- ret = pm_runtime_resume_and_get(pds[i]);
- if (ret < 0) {
- dev_pm_genpd_set_performance_state(pds[i], 0);
- goto unroll_pd_votes;
- }
+ while (pds && i < pds->num_pds) {
+ dev_pm_genpd_set_performance_state(pds->pd_devs[i], INT_MAX);
+ i++;
}

- return 0;
+ ret = pm_runtime_resume_and_get(dev);
+ if (ret < 0) {
+ while (pds && i > 0) {
+ i--;
+ dev_pm_genpd_set_performance_state(pds->pd_devs[i], 0);
+ }

-unroll_pd_votes:
- for (i--; i >= 0; i--) {
- dev_pm_genpd_set_performance_state(pds[i], 0);
- pm_runtime_put(pds[i]);
+ if (dev->pm_domain)
+ dev_pm_genpd_set_performance_state(dev, 0);
}

return ret;
}

-static void qcom_rproc_pds_disable(struct qcom_adsp *adsp, struct device **pds,
- size_t pd_count)
+static void qcom_rproc_pds_disable(struct qcom_adsp *adsp)
{
- int i;
+ struct device *dev = adsp->dev;
+ struct dev_pm_domain_list *pds = adsp->pd_list;
+ int i = 0;
+
+ if (!dev->pm_domain && !pds)
+ return;
+
+ if (dev->pm_domain)
+ dev_pm_genpd_set_performance_state(dev, 0);

- for (i = 0; i < pd_count; i++) {
- dev_pm_genpd_set_performance_state(pds[i], 0);
- pm_runtime_put(pds[i]);
+ while (pds && i < pds->num_pds) {
+ dev_pm_genpd_set_performance_state(pds->pd_devs[i], 0);
+ i++;
}
+
+ pm_runtime_put(dev);
}

static int qcom_wpss_shutdown(struct qcom_adsp *adsp)
@@ -397,8 +389,7 @@ static int adsp_start(struct rproc *rproc)
if (ret)
goto adsp_smmu_unmap;

- ret = qcom_rproc_pds_enable(adsp, adsp->proxy_pds,
- adsp->proxy_pd_count);
+ ret = qcom_rproc_pds_enable(adsp);
if (ret < 0)
goto disable_xo_clk;

@@ -448,7 +439,7 @@ static int adsp_start(struct rproc *rproc)
disable_adsp_clks:
clk_bulk_disable_unprepare(adsp->num_clks, adsp->clks);
disable_power_domain:
- qcom_rproc_pds_disable(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
+ qcom_rproc_pds_disable(adsp);
disable_xo_clk:
clk_disable_unprepare(adsp->xo);
adsp_smmu_unmap:
@@ -464,7 +455,7 @@ static void qcom_adsp_pil_handover(struct qcom_q6v5 *q6v5)
struct qcom_adsp *adsp = container_of(q6v5, struct qcom_adsp, q6v5);

clk_disable_unprepare(adsp->xo);
- qcom_rproc_pds_disable(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
+ qcom_rproc_pds_disable(adsp);
}

static int adsp_stop(struct rproc *rproc)
@@ -715,13 +706,11 @@ static int adsp_probe(struct platform_device *pdev)
if (ret)
goto free_rproc;

- ret = qcom_rproc_pds_attach(adsp->dev, adsp,
- desc->proxy_pd_names);
+ ret = qcom_rproc_pds_attach(adsp, desc->pd_names, desc->num_pds);
if (ret < 0) {
dev_err(&pdev->dev, "Failed to attach proxy power domains\n");
goto free_rproc;
}
- adsp->proxy_pd_count = ret;

ret = adsp_init_reset(adsp);
if (ret)
@@ -753,7 +742,7 @@ static int adsp_probe(struct platform_device *pdev)
return 0;

disable_pm:
- qcom_rproc_pds_detach(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
+ qcom_rproc_pds_detach(adsp);

free_rproc:
rproc_free(rproc);
@@ -771,7 +760,7 @@ static void adsp_remove(struct platform_device *pdev)
qcom_remove_glink_subdev(adsp->rproc, &adsp->glink_subdev);
qcom_remove_sysmon_subdev(adsp->sysmon);
qcom_remove_ssr_subdev(adsp->rproc, &adsp->ssr_subdev);
- qcom_rproc_pds_detach(adsp, adsp->proxy_pds, adsp->proxy_pd_count);
+ qcom_rproc_pds_detach(adsp);
rproc_free(adsp->rproc);
}

@@ -788,9 +777,8 @@ static const struct adsp_pil_data adsp_resource_init = {
"qdsp6ss_xo", "qdsp6ss_sleep", "qdsp6ss_core", NULL
},
.num_clks = 7,
- .proxy_pd_names = (const char*[]) {
- "cx", NULL
- },
+ .pd_names = (const char*[]) { "cx" },
+ .num_pds = 1,
};

static const struct adsp_pil_data adsp_sc7280_resource_init = {
@@ -821,9 +809,8 @@ static const struct adsp_pil_data cdsp_resource_init = {
"q6_axim", NULL
},
.num_clks = 7,
- .proxy_pd_names = (const char*[]) {
- "cx", NULL
- },
+ .pd_names = (const char*[]) { "cx" },
+ .num_pds = 1,
};

static const struct adsp_pil_data wpss_resource_init = {
@@ -839,9 +826,8 @@ static const struct adsp_pil_data wpss_resource_init = {
"ahb_bdg", "ahb", "rscp", NULL
},
.num_clks = 3,
- .proxy_pd_names = (const char*[]) {
- "cx", "mx", NULL
- },
+ .pd_names = (const char*[]) { "cx", "mx" },
+ .num_pds = 2,
};

static const struct of_device_id adsp_of_match[] = {
--
2.34.1