Re: [PATCH] drm/i915: Fix module initialisation, v2.

[Matt Roper <matthew.d.roper@intel.com>]

On Thu, Aug 27, 2015 at 03:15:15PM +0200, Maarten Lankhorst wrote:
> Set DRIVER_MODESET and DRIVER_ATOMIC by default. The driver is fully atomic.
> Remove the legacy suspend/resume, to fix a warning introduced by:
> 
> "drm: WARN_ON if a modeset driver uses legacy suspend/resume helpers"
> 
> and removing the .get_vblank_timestamp reset to NULL. It's a noop without UMS.
> 
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

Reviewed-by: Matt Roper <matthew.d.roper@intel.com>

> ---
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index 097d4ba0421c..f0eaa6f8826b 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -364,12 +364,12 @@ static void i915_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_
>  		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
>  		/* i915 resume handler doesn't set to D0 */
>  		pci_set_power_state(dev->pdev, PCI_D0);
> -		i915_resume_legacy(dev);
> +		i915_resume_switcheroo(dev);
>  		dev->switch_power_state = DRM_SWITCH_POWER_ON;
>  	} else {
>  		pr_err("switched off\n");
>  		dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
> -		i915_suspend_legacy(dev, pmm);
> +		i915_suspend_switcheroo(dev, pmm);
>  		dev->switch_power_state = DRM_SWITCH_POWER_OFF;
>  	}
>  }
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index ce3bd0c713b9..4646fe1a0499 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -679,7 +679,7 @@ static int i915_drm_suspend_late(struct drm_device *drm_dev, bool hibernation)
>  	return 0;
>  }
>  
> -int i915_suspend_legacy(struct drm_device *dev, pm_message_t state)
> +int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state)
>  {
>  	int error;
>  
> @@ -812,7 +812,7 @@ static int i915_drm_resume_early(struct drm_device *dev)
>  	return ret;
>  }
>  
> -int i915_resume_legacy(struct drm_device *dev)
> +int i915_resume_switcheroo(struct drm_device *dev)
>  {
>  	int ret;
>  
> @@ -1649,7 +1649,7 @@ static struct drm_driver driver = {
>  	 */
>  	.driver_features =
>  	    DRIVER_HAVE_IRQ | DRIVER_IRQ_SHARED | DRIVER_GEM | DRIVER_PRIME |
> -	    DRIVER_RENDER,
> +	    DRIVER_RENDER | DRIVER_MODESET,
>  	.load = i915_driver_load,
>  	.unload = i915_driver_unload,
>  	.open = i915_driver_open,
> @@ -1658,10 +1658,6 @@ static struct drm_driver driver = {
>  	.postclose = i915_driver_postclose,
>  	.set_busid = drm_pci_set_busid,
>  
> -	/* Used in place of i915_pm_ops for non-DRIVER_MODESET */
> -	.suspend = i915_suspend_legacy,
> -	.resume = i915_resume_legacy,
> -
>  #if defined(CONFIG_DEBUG_FS)
>  	.debugfs_init = i915_debugfs_init,
>  	.debugfs_cleanup = i915_debugfs_cleanup,
> @@ -1704,7 +1700,6 @@ static int __init i915_init(void)
>  	 * either the i915.modeset prarameter or by the
>  	 * vga_text_mode_force boot option.
>  	 */
> -	driver.driver_features |= DRIVER_MODESET;
>  
>  	if (i915.modeset == 0)
>  		driver.driver_features &= ~DRIVER_MODESET;
> @@ -1715,17 +1710,11 @@ static int __init i915_init(void)
>  #endif
>  
>  	if (!(driver.driver_features & DRIVER_MODESET)) {
> -		driver.get_vblank_timestamp = NULL;
>  		/* Silently fail loading to not upset userspace. */
>  		DRM_DEBUG_DRIVER("KMS and UMS disabled.\n");
>  		return 0;
>  	}
>  
> -	/*
> -	 * FIXME: Note that we're lying to the DRM core here so that we can get access
> -	 * to the atomic ioctl and the atomic properties.  Only plane operations on
> -	 * a single CRTC will actually work.
> -	 */
>  	if (i915.nuclear_pageflip)
>  		driver.driver_features |= DRIVER_ATOMIC;
>  
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 8c938451a05e..5c2541ddf212 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -2607,8 +2607,8 @@ struct drm_i915_cmd_table {
>  extern const struct drm_ioctl_desc i915_ioctls[];
>  extern int i915_max_ioctl;
>  
> -extern int i915_suspend_legacy(struct drm_device *dev, pm_message_t state);
> -extern int i915_resume_legacy(struct drm_device *dev);
> +extern int i915_suspend_switcheroo(struct drm_device *dev, pm_message_t state);
> +extern int i915_resume_switcheroo(struct drm_device *dev);
>  
>  /* i915_params.c */
>  struct i915_params {
> 
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-- 
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795
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