diff options
| -rw-r--r-- | drivers/gpu/drm/amd/acp/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c | 206 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_acp.h | 1 |
3 files changed, 207 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/acp/Kconfig b/drivers/gpu/drm/amd/acp/Kconfig index 28b5e70b502f..2b07813bceed 100644 --- a/drivers/gpu/drm/amd/acp/Kconfig +++ b/drivers/gpu/drm/amd/acp/Kconfig @@ -4,6 +4,7 @@ config DRM_AMD_ACP bool "Enable ACP IP support" default y select MFD_CORE + select PM_GENERIC_DOMAINS if PM help Choose this option to enable ACP IP support for AMD SOCs. diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c index 71f26e93ef58..9f8cfaab3004 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.c @@ -24,6 +24,7 @@ */ #include <linux/irqdomain.h> +#include <linux/pm_domain.h> #include <linux/platform_device.h> #include <sound/designware_i2s.h> #include <sound/pcm.h> @@ -102,6 +103,155 @@ static int acp_sw_fini(void *handle) return 0; } +/* power off a tile/block within ACP */ +static int acp_suspend_tile(void *cgs_dev, int tile) +{ + u32 val = 0; + u32 count = 0; + + if ((tile < ACP_TILE_P1) || (tile > ACP_TILE_DSP2)) { + pr_err("Invalid ACP tile : %d to suspend\n", tile); + return -1; + } + + val = cgs_read_register(cgs_dev, mmACP_PGFSM_READ_REG_0 + tile); + val &= ACP_TILE_ON_MASK; + + if (val == 0x0) { + val = cgs_read_register(cgs_dev, mmACP_PGFSM_RETAIN_REG); + val = val | (1 << tile); + cgs_write_register(cgs_dev, mmACP_PGFSM_RETAIN_REG, val); + cgs_write_register(cgs_dev, mmACP_PGFSM_CONFIG_REG, + 0x500 + tile); + + count = ACP_TIMEOUT_LOOP; + while (true) { + val = cgs_read_register(cgs_dev, mmACP_PGFSM_READ_REG_0 + + tile); + val = val & ACP_TILE_ON_MASK; + if (val == ACP_TILE_OFF_MASK) + break; + if (--count == 0) { + pr_err("Timeout reading ACP PGFSM status\n"); + return -ETIMEDOUT; + } + udelay(100); + } + + val = cgs_read_register(cgs_dev, mmACP_PGFSM_RETAIN_REG); + + val |= ACP_TILE_OFF_RETAIN_REG_MASK; + cgs_write_register(cgs_dev, mmACP_PGFSM_RETAIN_REG, val); + } + return 0; +} + +/* power on a tile/block within ACP */ +static int acp_resume_tile(void *cgs_dev, int tile) +{ + u32 val = 0; + u32 count = 0; + + if ((tile < ACP_TILE_P1) || (tile > ACP_TILE_DSP2)) { + pr_err("Invalid ACP tile to resume\n"); + return -1; + } + + val = cgs_read_register(cgs_dev, mmACP_PGFSM_READ_REG_0 + tile); + val = val & ACP_TILE_ON_MASK; + + if (val != 0x0) { + cgs_write_register(cgs_dev, mmACP_PGFSM_CONFIG_REG, + 0x600 + tile); + count = ACP_TIMEOUT_LOOP; + while (true) { + val = cgs_read_register(cgs_dev, mmACP_PGFSM_READ_REG_0 + + tile); + val = val & ACP_TILE_ON_MASK; + if (val == 0x0) + break; + if (--count == 0) { + pr_err("Timeout reading ACP PGFSM status\n"); + return -ETIMEDOUT; + } + udelay(100); + } + val = cgs_read_register(cgs_dev, mmACP_PGFSM_RETAIN_REG); + if (tile == ACP_TILE_P1) + val = val & (ACP_TILE_P1_MASK); + else if (tile == ACP_TILE_P2) + val = val & (ACP_TILE_P2_MASK); + + cgs_write_register(cgs_dev, mmACP_PGFSM_RETAIN_REG, val); + } + return 0; +} + +struct acp_pm_domain { + void *cgs_dev; + struct generic_pm_domain gpd; +}; + +static int acp_poweroff(struct generic_pm_domain *genpd) +{ + int i, ret; + struct acp_pm_domain *apd; + + apd = container_of(genpd, struct acp_pm_domain, gpd); + if (apd != NULL) { + /* Donot return abruptly if any of power tile fails to suspend. + * Log it and continue powering off other tile + */ + for (i = 4; i >= 0 ; i--) { + ret = acp_suspend_tile(apd->cgs_dev, ACP_TILE_P1 + i); + if (ret) + pr_err("ACP tile %d tile suspend failed\n", i); + } + } + return 0; +} + +static int acp_poweron(struct generic_pm_domain *genpd) +{ + int i, ret; + struct acp_pm_domain *apd; + + apd = container_of(genpd, struct acp_pm_domain, gpd); + if (apd != NULL) { + for (i = 0; i < 2; i++) { + ret = acp_resume_tile(apd->cgs_dev, ACP_TILE_P1 + i); + if (ret) { + pr_err("ACP tile %d resume failed\n", i); + break; + } + } + + /* Disable DSPs which are not going to be used */ + for (i = 0; i < 3; i++) { + ret = acp_suspend_tile(apd->cgs_dev, ACP_TILE_DSP0 + i); + /* Continue suspending other DSP, even if one fails */ + if (ret) + pr_err("ACP DSP %d suspend failed\n", i); + } + } + return 0; +} + +static struct device *get_mfd_cell_dev(const char *device_name, int r) +{ + char auto_dev_name[25]; + char buf[8]; + struct device *dev; + + sprintf(buf, ".%d.auto", r); + strcpy(auto_dev_name, device_name); + strcat(auto_dev_name, buf); + dev = bus_find_device_by_name(&platform_bus_type, NULL, auto_dev_name); + dev_info(dev, "device %s added to pm domain\n", auto_dev_name); + + return dev; +} + /** * acp_hw_init - start and test ACP block * @@ -110,8 +260,9 @@ static int acp_sw_fini(void *handle) */ static int acp_hw_init(void *handle) { - int r; + int r, i; uint64_t acp_base; + struct device *dev; struct i2s_platform_data *i2s_pdata; struct amdgpu_device *adev = (struct amdgpu_device *)handle; @@ -137,6 +288,19 @@ static int acp_hw_init(void *handle) else if (r) return r; + adev->acp.acp_genpd = kzalloc(sizeof(struct acp_pm_domain), GFP_KERNEL); + if (adev->acp.acp_genpd == NULL) + return -ENOMEM; + + adev->acp.acp_genpd->gpd.name = "ACP_AUDIO"; + adev->acp.acp_genpd->gpd.power_off = acp_poweroff; + adev->acp.acp_genpd->gpd.power_on = acp_poweron; + + + adev->acp.acp_genpd->cgs_dev = adev->acp.cgs_device; + + pm_genpd_init(&adev->acp.acp_genpd->gpd, NULL, false); + adev->acp.acp_cell = kzalloc(sizeof(struct mfd_cell) * ACP_DEVS, GFP_KERNEL); @@ -211,6 +375,15 @@ static int acp_hw_init(void *handle) if (r) return r; + for (i = 0; i < ACP_DEVS ; i++) { + dev = get_mfd_cell_dev(adev->acp.acp_cell[i].name, i); + r = pm_genpd_add_device(&adev->acp.acp_genpd->gpd, dev); + if (r) { + dev_err(dev, "Failed to add dev to genpd\n"); + return r; + } + } + return 0; } @@ -222,10 +395,22 @@ static int acp_hw_init(void *handle) */ static int acp_hw_fini(void *handle) { + int i, ret; + struct device *dev; + struct amdgpu_device *adev = (struct amdgpu_device *)handle; + for (i = 0; i < ACP_DEVS ; i++) { + dev = get_mfd_cell_dev(adev->acp.acp_cell[i].name, i); + ret = pm_genpd_remove_device(&adev->acp.acp_genpd->gpd, dev); + /* If removal fails, dont giveup and try rest */ + if (ret) + dev_err(dev, "remove dev from genpd failed\n"); + } + mfd_remove_devices(adev->acp.parent); kfree(adev->acp.acp_res); + kfree(adev->acp.acp_genpd); kfree(adev->acp.acp_cell); return 0; @@ -238,6 +423,25 @@ static int acp_suspend(void *handle) static int acp_resume(void *handle) { + int i, ret; + struct acp_pm_domain *apd; + struct amdgpu_device *adev = (struct amdgpu_device *)handle; + + /* SMU block will power on ACP irrespective of ACP runtime status. + * Power off explicitly based on genpd ACP runtime status so that ACP + * hw and ACP-genpd status are in sync. + * 'suspend_power_off' represents "Power status before system suspend" + */ + if (adev->acp.acp_genpd->gpd.suspend_power_off == true) { + apd = container_of(&adev->acp.acp_genpd->gpd, + struct acp_pm_domain, gpd); + + for (i = 4; i >= 0 ; i--) { + ret = acp_suspend_tile(apd->cgs_dev, ACP_TILE_P1 + i); + if (ret) + pr_err("ACP tile %d tile suspend failed\n", i); + } + } return 0; } diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.h index 24952ed8209e..f6e32a639107 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acp.h @@ -34,6 +34,7 @@ struct amdgpu_acp { struct amd_acp_private *private; struct mfd_cell *acp_cell; struct resource *acp_res; + struct acp_pm_domain *acp_genpd; }; extern const struct amd_ip_funcs acp_ip_funcs; |