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authorVijendar Mukunda <Vijendar.Mukunda@amd.com>2023-03-21 08:08:59 +0300
committerVinod Koul <vkoul@kernel.org>2023-04-12 13:00:36 +0300
commit81ff58ff71ad9dcddf5caffcf912cde6589d07bd (patch)
tree852cad3676e8c044878fc0c96cecf77a5978c1d5 /drivers/soundwire
parent65f93e4096a07abd41acf0d240715bd8c7ef7eeb (diff)
downloadlinux-81ff58ff71ad9dcddf5caffcf912cde6589d07bd.tar.xz
soundwire: amd: add runtime pm ops for AMD SoundWire manager driver
Add support for runtime pm ops for AMD SoundWire manager driver. Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@amd.com> Signed-off-by: Mastan Katragadda <Mastan.Katragadda@amd.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/lkml/20230227154801.50319-7-Vijendar.Mukunda@amd.com Link: https://lore.kernel.org/r/20230321050901.115439-7-Vijendar.Mukunda@amd.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'drivers/soundwire')
-rw-r--r--drivers/soundwire/amd_manager.c140
-rw-r--r--drivers/soundwire/amd_manager.h3
2 files changed, 143 insertions, 0 deletions
diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manager.c
index 49b7133cb41f..6172b3cb84d4 100644
--- a/drivers/soundwire/amd_manager.c
+++ b/drivers/soundwire/amd_manager.c
@@ -14,6 +14,7 @@
#include <linux/slab.h>
#include <linux/soundwire/sdw.h>
#include <linux/soundwire/sdw_registers.h>
+#include <linux/pm_runtime.h>
#include <linux/wait.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
@@ -133,6 +134,12 @@ static void amd_disable_sdw_interrupts(struct amd_sdw_manager *amd_manager)
writel(0x00, amd_manager->mmio + ACP_SW_ERROR_INTR_MASK);
}
+static int amd_deinit_sdw_manager(struct amd_sdw_manager *amd_manager)
+{
+ amd_disable_sdw_interrupts(amd_manager);
+ return amd_disable_sdw_manager(amd_manager);
+}
+
static void amd_sdw_set_frameshape(struct amd_sdw_manager *amd_manager)
{
u32 frame_size;
@@ -866,6 +873,12 @@ static void amd_sdw_probe_work(struct work_struct *work)
return;
amd_sdw_set_frameshape(amd_manager);
}
+ /* Enable runtime PM */
+ pm_runtime_set_autosuspend_delay(amd_manager->dev, AMD_SDW_MASTER_SUSPEND_DELAY_MS);
+ pm_runtime_use_autosuspend(amd_manager->dev);
+ pm_runtime_mark_last_busy(amd_manager->dev);
+ pm_runtime_set_active(amd_manager->dev);
+ pm_runtime_enable(amd_manager->dev);
}
static int amd_sdw_manager_probe(struct platform_device *pdev)
@@ -953,17 +966,144 @@ static int amd_sdw_manager_remove(struct platform_device *pdev)
{
struct amd_sdw_manager *amd_manager = dev_get_drvdata(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
cancel_work_sync(&amd_manager->probe_work);
amd_disable_sdw_interrupts(amd_manager);
sdw_bus_master_delete(&amd_manager->bus);
return amd_disable_sdw_manager(amd_manager);
}
+static int amd_sdw_clock_stop(struct amd_sdw_manager *amd_manager)
+{
+ u32 val;
+ int ret;
+
+ ret = sdw_bus_prep_clk_stop(&amd_manager->bus);
+ if (ret < 0 && ret != -ENODATA) {
+ dev_err(amd_manager->dev, "prepare clock stop failed %d", ret);
+ return 0;
+ }
+ ret = sdw_bus_clk_stop(&amd_manager->bus);
+ if (ret < 0 && ret != -ENODATA) {
+ dev_err(amd_manager->dev, "bus clock stop failed %d", ret);
+ return 0;
+ }
+
+ ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL, val,
+ (val & AMD_SDW_CLK_STOP_DONE), ACP_DELAY_US, AMD_SDW_TIMEOUT);
+ if (ret) {
+ dev_err(amd_manager->dev, "SDW%x clock stop failed\n", amd_manager->instance);
+ return 0;
+ }
+
+ amd_manager->clk_stopped = true;
+ if (amd_manager->wake_en_mask)
+ writel(0x01, amd_manager->acp_mmio + ACP_SW_WAKE_EN(amd_manager->instance));
+
+ dev_dbg(amd_manager->dev, "SDW%x clock stop successful\n", amd_manager->instance);
+ return 0;
+}
+
+static int amd_sdw_clock_stop_exit(struct amd_sdw_manager *amd_manager)
+{
+ int ret;
+ u32 val;
+
+ if (amd_manager->clk_stopped) {
+ val = readl(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
+ val |= AMD_SDW_CLK_RESUME_REQ;
+ writel(val, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
+ ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL, val,
+ (val & AMD_SDW_CLK_RESUME_DONE), ACP_DELAY_US,
+ AMD_SDW_TIMEOUT);
+ if (val & AMD_SDW_CLK_RESUME_DONE) {
+ writel(0, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
+ ret = sdw_bus_exit_clk_stop(&amd_manager->bus);
+ if (ret < 0)
+ dev_err(amd_manager->dev, "bus failed to exit clock stop %d\n",
+ ret);
+ amd_manager->clk_stopped = false;
+ }
+ }
+ if (amd_manager->clk_stopped) {
+ dev_err(amd_manager->dev, "SDW%x clock stop exit failed\n", amd_manager->instance);
+ return 0;
+ }
+ dev_dbg(amd_manager->dev, "SDW%x clock stop exit successful\n", amd_manager->instance);
+ return 0;
+}
+
+static int __maybe_unused amd_suspend_runtime(struct device *dev)
+{
+ struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev);
+ struct sdw_bus *bus = &amd_manager->bus;
+ int ret;
+
+ if (bus->prop.hw_disabled) {
+ dev_dbg(bus->dev, "SoundWire manager %d is disabled,\n",
+ bus->link_id);
+ return 0;
+ }
+ if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
+ return amd_sdw_clock_stop(amd_manager);
+ } else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
+ ret = amd_sdw_clock_stop(amd_manager);
+ if (ret)
+ return ret;
+ return amd_deinit_sdw_manager(amd_manager);
+ }
+ return 0;
+}
+
+static int __maybe_unused amd_resume_runtime(struct device *dev)
+{
+ struct amd_sdw_manager *amd_manager = dev_get_drvdata(dev);
+ struct sdw_bus *bus = &amd_manager->bus;
+ int ret;
+ u32 val;
+
+ if (bus->prop.hw_disabled) {
+ dev_dbg(bus->dev, "SoundWire manager %d is disabled, ignoring\n",
+ bus->link_id);
+ return 0;
+ }
+
+ if (amd_manager->power_mode_mask & AMD_SDW_CLK_STOP_MODE) {
+ return amd_sdw_clock_stop_exit(amd_manager);
+ } else if (amd_manager->power_mode_mask & AMD_SDW_POWER_OFF_MODE) {
+ val = readl(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
+ if (val) {
+ val |= AMD_SDW_CLK_RESUME_REQ;
+ writel(val, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
+ ret = readl_poll_timeout(amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL, val,
+ (val & AMD_SDW_CLK_RESUME_DONE), ACP_DELAY_US,
+ AMD_SDW_TIMEOUT);
+ if (val & AMD_SDW_CLK_RESUME_DONE) {
+ writel(0, amd_manager->mmio + ACP_SW_CLK_RESUME_CTRL);
+ amd_manager->clk_stopped = false;
+ }
+ }
+ sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
+ amd_init_sdw_manager(amd_manager);
+ amd_enable_sdw_interrupts(amd_manager);
+ ret = amd_enable_sdw_manager(amd_manager);
+ if (ret)
+ return ret;
+ amd_sdw_set_frameshape(amd_manager);
+ }
+ return 0;
+}
+
+static const struct dev_pm_ops amd_pm = {
+ SET_RUNTIME_PM_OPS(amd_suspend_runtime, amd_resume_runtime, NULL)
+};
+
static struct platform_driver amd_sdw_driver = {
.probe = &amd_sdw_manager_probe,
.remove = &amd_sdw_manager_remove,
.driver = {
.name = "amd_sdw_manager",
+ .pm = &amd_pm,
}
};
module_platform_driver(amd_sdw_driver);
diff --git a/drivers/soundwire/amd_manager.h b/drivers/soundwire/amd_manager.h
index fca7d792bf5f..b101f4536230 100644
--- a/drivers/soundwire/amd_manager.h
+++ b/drivers/soundwire/amd_manager.h
@@ -186,6 +186,9 @@
#define AMD_SDW0_PAD_KEEPER_DISABLE_MASK 0x1e
#define AMD_SDW1_PAD_KEEPER_DISABLE_MASK 0xf
#define AMD_SDW_PREQ_INTR_STAT BIT(19)
+#define AMD_SDW_CLK_STOP_DONE 1
+#define AMD_SDW_CLK_RESUME_REQ 2
+#define AMD_SDW_CLK_RESUME_DONE 3
static u32 amd_sdw_freq_tbl[AMD_SDW_MAX_FREQ_NUM] = {
AMD_SDW_DEFAULT_CLK_FREQ,