Re: [PATCH] drm/radeon: fix runpm handling on APUs (v4)

["Christian König" <deathsimple@vodafone.de>]

Am 11.04.2014 04:29, schrieb Alex Deucher:
> Don't try and runtime suspend the APU in PX systems.  We
> only want to power down the dGPU.
>
> v2: fix harder
> v3: fix stupid typo
> v4: consolidate runpm enablement to a single flag
>
> bugs:
> https://bugs.freedesktop.org/show_bug.cgi?id=75127
> https://bugzilla.kernel.org/show_bug.cgi?id=72701
>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> Cc: stable@vger.kernel.org

All three patches added to my drm-fixes-3.15 queue.

Is it correct that "[PATCH] drm/radeon: update CI DPM powertune 
settings" doesn't have a "CC: stable..." ?

Christian.

> ---
>   drivers/gpu/drm/radeon/radeon.h              |  1 +
>   drivers/gpu/drm/radeon/radeon_atpx_handler.c |  2 +-
>   drivers/gpu/drm/radeon/radeon_device.c       | 19 ++++++++++---------
>   drivers/gpu/drm/radeon/radeon_drv.c          | 24 ++++--------------------
>   drivers/gpu/drm/radeon/radeon_family.h       |  1 +
>   drivers/gpu/drm/radeon/radeon_kms.c          | 14 ++++++++++----
>   6 files changed, 27 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
> index f0fc2c8..3d94c0d 100644
> --- a/drivers/gpu/drm/radeon/radeon.h
> +++ b/drivers/gpu/drm/radeon/radeon.h
> @@ -2318,6 +2318,7 @@ struct radeon_device {
>   	bool have_disp_power_ref;
>   };
>   
> +bool radeon_is_px(struct drm_device *dev);
>   int radeon_device_init(struct radeon_device *rdev,
>   		       struct drm_device *ddev,
>   		       struct pci_dev *pdev,
> diff --git a/drivers/gpu/drm/radeon/radeon_atpx_handler.c b/drivers/gpu/drm/radeon/radeon_atpx_handler.c
> index fa9a9c0..dedea72 100644
> --- a/drivers/gpu/drm/radeon/radeon_atpx_handler.c
> +++ b/drivers/gpu/drm/radeon/radeon_atpx_handler.c
> @@ -59,7 +59,7 @@ struct atpx_mux {
>   	u16 mux;
>   } __packed;
>   
> -bool radeon_is_px(void) {
> +bool radeon_has_atpx(void) {
>   	return radeon_atpx_priv.atpx_detected;
>   }
>   
> diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
> index 2e72dcd..00b19d0 100644
> --- a/drivers/gpu/drm/radeon/radeon_device.c
> +++ b/drivers/gpu/drm/radeon/radeon_device.c
> @@ -102,11 +102,14 @@ static const char radeon_family_name[][16] = {
>   	"LAST",
>   };
>   
> -#if defined(CONFIG_VGA_SWITCHEROO)
> -bool radeon_is_px(void);
> -#else
> -static inline bool radeon_is_px(void) { return false; }
> -#endif
> +bool radeon_is_px(struct drm_device *dev)
> +{
> +	struct radeon_device *rdev = dev->dev_private;
> +
> +	if (rdev->flags & RADEON_IS_PX)
> +		return true;
> +	return false;
> +}
>   
>   /**
>    * radeon_program_register_sequence - program an array of registers.
> @@ -1082,7 +1085,7 @@ static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switchero
>   {
>   	struct drm_device *dev = pci_get_drvdata(pdev);
>   
> -	if (radeon_is_px() && state == VGA_SWITCHEROO_OFF)
> +	if (radeon_is_px(dev) && state == VGA_SWITCHEROO_OFF)
>   		return;
>   
>   	if (state == VGA_SWITCHEROO_ON) {
> @@ -1301,9 +1304,7 @@ int radeon_device_init(struct radeon_device *rdev,
>   	 * ignore it */
>   	vga_client_register(rdev->pdev, rdev, NULL, radeon_vga_set_decode);
>   
> -	if (radeon_runtime_pm == 1)
> -		runtime = true;
> -	if ((radeon_runtime_pm == -1) && radeon_is_px())
> +	if (rdev->flags & RADEON_IS_PX)
>   		runtime = true;
>   	vga_switcheroo_register_client(rdev->pdev, &radeon_switcheroo_ops, runtime);
>   	if (runtime)
> diff --git a/drivers/gpu/drm/radeon/radeon_drv.c b/drivers/gpu/drm/radeon/radeon_drv.c
> index 2dc2cc4..3811812 100644
> --- a/drivers/gpu/drm/radeon/radeon_drv.c
> +++ b/drivers/gpu/drm/radeon/radeon_drv.c
> @@ -114,6 +114,7 @@ extern int radeon_get_crtc_scanoutpos(struct drm_device *dev, int crtc,
>   				      unsigned int flags,
>   				      int *vpos, int *hpos, ktime_t *stime,
>   				      ktime_t *etime);
> +extern bool radeon_is_px(struct drm_device *dev);
>   extern const struct drm_ioctl_desc radeon_ioctls_kms[];
>   extern int radeon_max_kms_ioctl;
>   int radeon_mmap(struct file *filp, struct vm_area_struct *vma);
> @@ -143,11 +144,9 @@ void radeon_debugfs_cleanup(struct drm_minor *minor);
>   #if defined(CONFIG_VGA_SWITCHEROO)
>   void radeon_register_atpx_handler(void);
>   void radeon_unregister_atpx_handler(void);
> -bool radeon_is_px(void);
>   #else
>   static inline void radeon_register_atpx_handler(void) {}
>   static inline void radeon_unregister_atpx_handler(void) {}
> -static inline bool radeon_is_px(void) { return false; }
>   #endif
>   
>   int radeon_no_wb;
> @@ -404,12 +403,7 @@ static int radeon_pmops_runtime_suspend(struct device *dev)
>   	struct drm_device *drm_dev = pci_get_drvdata(pdev);
>   	int ret;
>   
> -	if (radeon_runtime_pm == 0) {
> -		pm_runtime_forbid(dev);
> -		return -EBUSY;
> -	}
> -
> -	if (radeon_runtime_pm == -1 && !radeon_is_px()) {
> +	if (!radeon_is_px(drm_dev)) {
>   		pm_runtime_forbid(dev);
>   		return -EBUSY;
>   	}
> @@ -433,10 +427,7 @@ static int radeon_pmops_runtime_resume(struct device *dev)
>   	struct drm_device *drm_dev = pci_get_drvdata(pdev);
>   	int ret;
>   
> -	if (radeon_runtime_pm == 0)
> -		return -EINVAL;
> -
> -	if (radeon_runtime_pm == -1 && !radeon_is_px())
> +	if (!radeon_is_px(drm_dev))
>   		return -EINVAL;
>   
>   	drm_dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
> @@ -461,14 +452,7 @@ static int radeon_pmops_runtime_idle(struct device *dev)
>   	struct drm_device *drm_dev = pci_get_drvdata(pdev);
>   	struct drm_crtc *crtc;
>   
> -	if (radeon_runtime_pm == 0) {
> -		pm_runtime_forbid(dev);
> -		return -EBUSY;
> -	}
> -
> -	/* are we PX enabled? */
> -	if (radeon_runtime_pm == -1 && !radeon_is_px()) {
> -		DRM_DEBUG_DRIVER("failing to power off - not px\n");
> +	if (!radeon_is_px(drm_dev)) {
>   		pm_runtime_forbid(dev);
>   		return -EBUSY;
>   	}
> diff --git a/drivers/gpu/drm/radeon/radeon_family.h b/drivers/gpu/drm/radeon/radeon_family.h
> index 614ad54..9da5da4 100644
> --- a/drivers/gpu/drm/radeon/radeon_family.h
> +++ b/drivers/gpu/drm/radeon/radeon_family.h
> @@ -115,6 +115,7 @@ enum radeon_chip_flags {
>   	RADEON_NEW_MEMMAP = 0x00400000UL,
>   	RADEON_IS_PCI = 0x00800000UL,
>   	RADEON_IS_IGPGART = 0x01000000UL,
> +	RADEON_IS_PX = 0x02000000UL,
>   };
>   
>   #endif
> diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c
> index 3e49342..9337820 100644
> --- a/drivers/gpu/drm/radeon/radeon_kms.c
> +++ b/drivers/gpu/drm/radeon/radeon_kms.c
> @@ -35,9 +35,9 @@
>   #include <linux/pm_runtime.h>
>   
>   #if defined(CONFIG_VGA_SWITCHEROO)
> -bool radeon_is_px(void);
> +bool radeon_has_atpx(void);
>   #else
> -static inline bool radeon_is_px(void) { return false; }
> +static inline bool radeon_has_atpx(void) { return false; }
>   #endif
>   
>   /**
> @@ -107,6 +107,13 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
>   		flags |= RADEON_IS_PCI;
>   	}
>   
> +	if (radeon_runtime_pm == 1)
> +		flags |= RADEON_IS_PX;
> +	else if ((radeon_runtime_pm == -1) &&
> +		 radeon_has_atpx() &&
> +		 ((flags & RADEON_IS_IGP) == 0))
> +		flags |= RADEON_IS_PX;
> +
>   	/* radeon_device_init should report only fatal error
>   	 * like memory allocation failure or iomapping failure,
>   	 * or memory manager initialization failure, it must
> @@ -137,8 +144,7 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
>   				"Error during ACPI methods call\n");
>   	}
>   
> -	if ((radeon_runtime_pm == 1) ||
> -	    ((radeon_runtime_pm == -1) && radeon_is_px())) {
> +	if (radeon_is_px(dev)) {
>   		pm_runtime_use_autosuspend(dev->dev);
>   		pm_runtime_set_autosuspend_delay(dev->dev, 5000);
>   		pm_runtime_set_active(dev->dev);