169 lines
5 KiB
Diff
169 lines
5 KiB
Diff
From 9002a4c51191dc2c47a85b65011f9aabfa8af22a Mon Sep 17 00:00:00 2001
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From: Pavel Golikov <Paullo612@ya.ru>
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Date: Mon, 6 Jun 2022 18:32:57 +0300
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Subject: [PATCH 2/2] soc: samsung: pm_domains: Bring back old driver
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implementation
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Using new implementation decreases Mali GPU performance significantly
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(with both KBase and Panfrost drivers).
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Signed-off-by: Pavel Golikov <Paullo612@ya.ru>
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---
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drivers/soc/samsung/pm_domains.c | 97 ++++++++++++++++----------------
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1 file changed, 49 insertions(+), 48 deletions(-)
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diff --git a/drivers/soc/samsung/pm_domains.c b/drivers/soc/samsung/pm_domains.c
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index d07f3c9d6903..1022d40eb700 100644
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--- a/drivers/soc/samsung/pm_domains.c
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+++ b/drivers/soc/samsung/pm_domains.c
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@@ -16,7 +16,7 @@
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#include <linux/delay.h>
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#include <linux/of_address.h>
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#include <linux/of_platform.h>
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-#include <linux/pm_runtime.h>
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+#include <linux/sched.h>
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struct exynos_pm_domain_config {
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/* Value for LOCAL_PWR_CFG and STATUS fields for each domain */
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@@ -72,15 +72,15 @@ static int exynos_pd_power_off(struct generic_pm_domain *domain)
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return exynos_pd_power(domain, false);
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}
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-static const struct exynos_pm_domain_config exynos4210_cfg = {
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+static const struct exynos_pm_domain_config exynos4210_cfg __initconst = {
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.local_pwr_cfg = 0x7,
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};
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-static const struct exynos_pm_domain_config exynos5433_cfg = {
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+static const struct exynos_pm_domain_config exynos5433_cfg __initconst = {
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.local_pwr_cfg = 0xf,
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};
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-static const struct of_device_id exynos_pm_domain_of_match[] = {
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+static const struct of_device_id exynos_pm_domain_of_match[] __initconst = {
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{
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.compatible = "samsung,exynos4210-pd",
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.data = &exynos4210_cfg,
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@@ -91,7 +91,7 @@ static const struct of_device_id exynos_pm_domain_of_match[] = {
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{ },
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};
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-static const char *exynos_get_domain_name(struct device_node *node)
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+static __init const char *exynos_get_domain_name(struct device_node *node)
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{
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const char *name;
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@@ -100,44 +100,60 @@ static const char *exynos_get_domain_name(struct device_node *node)
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return kstrdup_const(name, GFP_KERNEL);
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}
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-static int exynos_pd_probe(struct platform_device *pdev)
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+static __init int exynos4_pm_init_power_domain(void)
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{
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- const struct exynos_pm_domain_config *pm_domain_cfg;
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- struct device *dev = &pdev->dev;
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- struct device_node *np = dev->of_node;
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- struct of_phandle_args child, parent;
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- struct exynos_pm_domain *pd;
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- int on, ret;
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+ struct device_node *np;
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+ const struct of_device_id *match;
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- pm_domain_cfg = of_device_get_match_data(dev);
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- pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
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- if (!pd)
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- return -ENOMEM;
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+ for_each_matching_node_and_match(np, exynos_pm_domain_of_match, &match) {
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+ const struct exynos_pm_domain_config *pm_domain_cfg;
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+ struct exynos_pm_domain *pd;
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+ int on;
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- pd->pd.name = exynos_get_domain_name(np);
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- if (!pd->pd.name)
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- return -ENOMEM;
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+ pm_domain_cfg = match->data;
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- pd->base = of_iomap(np, 0);
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- if (!pd->base) {
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- kfree_const(pd->pd.name);
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- return -ENODEV;
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- }
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+ pd = kzalloc(sizeof(*pd), GFP_KERNEL);
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+ if (!pd) {
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+ of_node_put(np);
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+ return -ENOMEM;
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+ }
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+ pd->pd.name = exynos_get_domain_name(np);
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+ if (!pd->pd.name) {
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+ kfree(pd);
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+ of_node_put(np);
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+ return -ENOMEM;
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+ }
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- pd->pd.power_off = exynos_pd_power_off;
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- pd->pd.power_on = exynos_pd_power_on;
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- pd->local_pwr_cfg = pm_domain_cfg->local_pwr_cfg;
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+ pd->base = of_iomap(np, 0);
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+ if (!pd->base) {
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+ pr_warn("%s: failed to map memory\n", __func__);
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+ kfree_const(pd->pd.name);
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+ kfree(pd);
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+ continue;
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+ }
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+
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+ pd->pd.power_off = exynos_pd_power_off;
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+ pd->pd.power_on = exynos_pd_power_on;
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+ pd->local_pwr_cfg = pm_domain_cfg->local_pwr_cfg;
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- on = readl_relaxed(pd->base + 0x4) & pd->local_pwr_cfg;
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+ on = readl_relaxed(pd->base + 0x4) & pd->local_pwr_cfg;
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+
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+ pm_genpd_init(&pd->pd, NULL, !on);
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+ of_genpd_add_provider_simple(np, &pd->pd);
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+ }
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- pm_genpd_init(&pd->pd, NULL, !on);
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- ret = of_genpd_add_provider_simple(np, &pd->pd);
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+ /* Assign the child power domains to their parents */
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+ for_each_matching_node(np, exynos_pm_domain_of_match) {
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+ struct of_phandle_args child, parent;
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- if (ret == 0 && of_parse_phandle_with_args(np, "power-domains",
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- "#power-domain-cells", 0, &parent) == 0) {
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child.np = np;
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child.args_count = 0;
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+ if (of_parse_phandle_with_args(np, "power-domains",
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+ "#power-domain-cells", 0,
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+ &parent) != 0)
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+ continue;
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+
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if (of_genpd_add_subdomain(&parent, &child))
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pr_warn("%pOF failed to add subdomain: %pOF\n",
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parent.np, child.np);
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@@ -146,21 +162,6 @@ static int exynos_pd_probe(struct platform_device *pdev)
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parent.np, child.np);
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}
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- pm_runtime_enable(dev);
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- return ret;
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-}
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-
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-static struct platform_driver exynos_pd_driver = {
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- .probe = exynos_pd_probe,
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- .driver = {
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- .name = "exynos-pd",
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- .of_match_table = exynos_pm_domain_of_match,
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- .suppress_bind_attrs = true,
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- }
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-};
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-
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-static __init int exynos4_pm_init_power_domain(void)
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-{
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- return platform_driver_register(&exynos_pd_driver);
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+ return 0;
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}
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core_initcall(exynos4_pm_init_power_domain);
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--
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2.25.1
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