diff mbox series

[02/12] soc: qcom: aoss: Drop power domain support

Message ID 1618574638-5117-3-git-send-email-sibis@codeaurora.org (mailing list archive)
State New
Headers show
Series Use qmp_send to update co-processor load state | expand

Commit Message

Sibi Sankar April 16, 2021, 12:03 p.m. UTC
The load state resources are expected to follow the life cycle of the
remote processor it tracks. However, modeling load state resources as
power-domains result in them getting turned off during system suspend
and thereby falling out of sync with the remote processors that are still
on. Fix this by replacing load state resource control through the generic
qmp message send interface instead.

Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
---
 drivers/soc/qcom/qcom_aoss.c | 109 ++-----------------------------------------
 1 file changed, 3 insertions(+), 106 deletions(-)

Comments

Stephen Boyd April 18, 2021, 2:01 a.m. UTC | #1
Quoting Sibi Sankar (2021-04-16 05:03:48)
> The load state resources are expected to follow the life cycle of the
> remote processor it tracks. However, modeling load state resources as
> power-domains result in them getting turned off during system suspend
> and thereby falling out of sync with the remote processors that are still
> on. Fix this by replacing load state resource control through the generic
> qmp message send interface instead.
> 
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> ---

Is it possible to keep this code around for a cycle so that there isn't
the chance that someone is using the deprecated DT bindings with a new
kernel? I worry that ripping the code out will cause them angst.
Certainly we have to keep the code in place until DT is updated, so this
patch should come last?
Sibi Sankar April 27, 2021, 6:25 a.m. UTC | #2
On 2021-04-18 07:31, Stephen Boyd wrote:
> Quoting Sibi Sankar (2021-04-16 05:03:48)
>> The load state resources are expected to follow the life cycle of the
>> remote processor it tracks. However, modeling load state resources as
>> power-domains result in them getting turned off during system suspend
>> and thereby falling out of sync with the remote processors that are 
>> still
>> on. Fix this by replacing load state resource control through the 
>> generic
>> qmp message send interface instead.
>> 
>> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
>> ---
> 
> Is it possible to keep this code around for a cycle so that there isn't
> the chance that someone is using the deprecated DT bindings with a new
> kernel? I worry that ripping the code out will cause them angst.

deprecated bindings with a newer kernel
shouldn't cause any problems since it is
the driver changes that make AOSS PD
mandatory or not. So the newer kernel will
just use qmp_send and leave the PD unused.

> Certainly we have to keep the code in place until DT is updated, so 
> this
> patch should come last?

sure I don't mind, as long as it simplifies
the merge process.
diff mbox series

Patch

diff --git a/drivers/soc/qcom/qcom_aoss.c b/drivers/soc/qcom/qcom_aoss.c
index 51b32f6d9bdb..f084ea9f6b66 100644
--- a/drivers/soc/qcom/qcom_aoss.c
+++ b/drivers/soc/qcom/qcom_aoss.c
@@ -2,7 +2,6 @@ 
 /*
  * Copyright (c) 2019, Linaro Ltd
  */
-#include <dt-bindings/power/qcom-aoss-qmp.h>
 #include <linux/clk-provider.h>
 #include <linux/debugfs.h>
 #include <linux/interrupt.h>
@@ -11,7 +10,6 @@ 
 #include <linux/module.h>
 #include <linux/of_platform.h>
 #include <linux/platform_device.h>
-#include <linux/pm_domain.h>
 #include <linux/thermal.h>
 #include <linux/slab.h>
 #include <linux/soc/qcom/qcom_aoss.h>
@@ -68,7 +66,6 @@  struct qmp_cooling_device {
  * @event: wait_queue for synchronization with the IRQ
  * @tx_lock: provides synchronization between multiple callers of qmp_send()
  * @qdss_clk: QDSS clock hw struct
- * @pd_data: genpd data
  * @cooling_devs: thermal cooling devices
  */
 struct qmp {
@@ -87,20 +84,12 @@  struct qmp {
 	struct mutex tx_lock;
 
 	struct clk_hw qdss_clk;
-	struct genpd_onecell_data pd_data;
 	struct qmp_cooling_device *cooling_devs;
 #if IS_ENABLED(CONFIG_DEBUG_FS)
 	struct dentry *debugfs_file;
 #endif /* CONFIG_DEBUG_FS */
 };
 
-struct qmp_pd {
-	struct qmp *qmp;
-	struct generic_pm_domain pd;
-};
-
-#define to_qmp_pd_resource(res) container_of(res, struct qmp_pd, pd)
-
 static void qmp_kick(struct qmp *qmp)
 {
 	mbox_send_message(qmp->mbox_chan, NULL);
@@ -329,95 +318,6 @@  static void qmp_qdss_clk_remove(struct qmp *qmp)
 	clk_hw_unregister(&qmp->qdss_clk);
 }
 
-static int qmp_pd_power_toggle(struct qmp_pd *res, bool enable)
-{
-	char buf[QMP_MSG_LEN] = {};
-
-	snprintf(buf, sizeof(buf),
-		 "{class: image, res: load_state, name: %s, val: %s}",
-		 res->pd.name, enable ? "on" : "off");
-	return qmp_send(res->qmp, buf, sizeof(buf));
-}
-
-static int qmp_pd_power_on(struct generic_pm_domain *domain)
-{
-	return qmp_pd_power_toggle(to_qmp_pd_resource(domain), true);
-}
-
-static int qmp_pd_power_off(struct generic_pm_domain *domain)
-{
-	return qmp_pd_power_toggle(to_qmp_pd_resource(domain), false);
-}
-
-static const char * const sdm845_resources[] = {
-	[AOSS_QMP_LS_CDSP] = "cdsp",
-	[AOSS_QMP_LS_LPASS] = "adsp",
-	[AOSS_QMP_LS_MODEM] = "modem",
-	[AOSS_QMP_LS_SLPI] = "slpi",
-	[AOSS_QMP_LS_SPSS] = "spss",
-	[AOSS_QMP_LS_VENUS] = "venus",
-};
-
-static int qmp_pd_add(struct qmp *qmp)
-{
-	struct genpd_onecell_data *data = &qmp->pd_data;
-	struct device *dev = qmp->dev;
-	struct qmp_pd *res;
-	size_t num = ARRAY_SIZE(sdm845_resources);
-	int ret;
-	int i;
-
-	res = devm_kcalloc(dev, num, sizeof(*res), GFP_KERNEL);
-	if (!res)
-		return -ENOMEM;
-
-	data->domains = devm_kcalloc(dev, num, sizeof(*data->domains),
-				     GFP_KERNEL);
-	if (!data->domains)
-		return -ENOMEM;
-
-	for (i = 0; i < num; i++) {
-		res[i].qmp = qmp;
-		res[i].pd.name = sdm845_resources[i];
-		res[i].pd.power_on = qmp_pd_power_on;
-		res[i].pd.power_off = qmp_pd_power_off;
-
-		ret = pm_genpd_init(&res[i].pd, NULL, true);
-		if (ret < 0) {
-			dev_err(dev, "failed to init genpd\n");
-			goto unroll_genpds;
-		}
-
-		data->domains[i] = &res[i].pd;
-	}
-
-	data->num_domains = i;
-
-	ret = of_genpd_add_provider_onecell(dev->of_node, data);
-	if (ret < 0)
-		goto unroll_genpds;
-
-	return 0;
-
-unroll_genpds:
-	for (i--; i >= 0; i--)
-		pm_genpd_remove(data->domains[i]);
-
-	return ret;
-}
-
-static void qmp_pd_remove(struct qmp *qmp)
-{
-	struct genpd_onecell_data *data = &qmp->pd_data;
-	struct device *dev = qmp->dev;
-	int i;
-
-	of_genpd_del_provider(dev->of_node);
-
-	for (i = 0; i < data->num_domains; i++)
-		pm_genpd_remove(data->domains[i]);
-}
-
 static int qmp_cdev_get_max_state(struct thermal_cooling_device *cdev,
 				  unsigned long *state)
 {
@@ -636,13 +536,11 @@  static int qmp_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_close_qmp;
 
-	ret = qmp_pd_add(qmp);
-	if (ret)
-		goto err_remove_qdss_clk;
-
 	ret = qmp_cooling_devices_register(qmp);
-	if (ret)
+	if (ret) {
 		dev_err(&pdev->dev, "failed to register aoss cooling devices\n");
+		goto err_remove_qdss_clk;
+	}
 
 	platform_set_drvdata(pdev, qmp);
 
@@ -674,7 +572,6 @@  static int qmp_remove(struct platform_device *pdev)
 #endif /* CONFIG_DEBUG_FS */
 
 	qmp_qdss_clk_remove(qmp);
-	qmp_pd_remove(qmp);
 	qmp_cooling_devices_remove(qmp);
 
 	qmp_close(qmp);