[PATCH 03/15] vga_switcheroo: Set active attribute to false for audio clients

[Lukas Wunner]

After sending the below patch away I realized that this change allows
us to simplify the code a bit by dropping the client_is_vga() call
from find_active_client().

I force-pushed an amended version of the commit to my vga_switcheroo_docs
branch on GitHub:
https://github.com/l1k/linux/commit/85dc1f299dec5a52266d82e2f4c02adfb04f77e6


On Thu, Aug 27, 2015 at 04:43:43PM +0200, Lukas Wunner wrote:
> The active attribute in struct vga_switcheroo_client denotes whether
> the outputs are currently switched to this client. The attribute is
> only meaningful for vga clients. It is never used for audio clients.
> 
> The function vga_switcheroo_register_audio_client() misuses this
> attribute to store whether the audio device is fully initialized.
> Most likely there was a misunderstanding about the meaning of
> "active" when this was added.
> 
> Set the active attribute to false for audio clients. Remove the
> active parameter from vga_switcheroo_register_audio_client() and
> its sole caller, hda_intel.c:register_vga_switcheroo().
> 
> vga_switcheroo_register_audio_client() was introduced by 3e9e63dbd374
> ("vga_switcheroo: Add the support for audio clients"). Its use in
> hda_intel.c was introduced by a82d51ed24bb ("ALSA: hda - Support
> VGA-switcheroo").
> 
> Cc: Takashi Iwai <tiwai at suse.de>
> Signed-off-by: Lukas Wunner <lukas at wunner.de>
> ---
>  drivers/gpu/vga/vga_switcheroo.c | 5 ++---
>  include/linux/vga_switcheroo.h   | 4 ++--
>  sound/pci/hda/hda_intel.c        | 3 +--
>  3 files changed, 5 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
> index b19a72f..fe32536 100644
> --- a/drivers/gpu/vga/vga_switcheroo.c
> +++ b/drivers/gpu/vga/vga_switcheroo.c
> @@ -290,7 +290,6 @@ EXPORT_SYMBOL(vga_switcheroo_register_client);
>   * @pdev: client pci device
>   * @ops: client callbacks
>   * @id: client identifier, see enum vga_switcheroo_client_id
> - * @active: whether the audio device is fully initialized
>   *
>   * Register audio client (audio device on a GPU). The power state of the
>   * client is assumed to be ON.
> @@ -299,9 +298,9 @@ EXPORT_SYMBOL(vga_switcheroo_register_client);
>   */
>  int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
>  					 const struct vga_switcheroo_client_ops *ops,
> -					 int id, bool active)
> +					 int id)
>  {
> -	return register_client(pdev, ops, id | ID_BIT_AUDIO, active, false);
> +	return register_client(pdev, ops, id | ID_BIT_AUDIO, false, false);
>  }
>  EXPORT_SYMBOL(vga_switcheroo_register_audio_client);
>  
> diff --git a/include/linux/vga_switcheroo.h b/include/linux/vga_switcheroo.h
> index fe90bfc..3764991 100644
> --- a/include/linux/vga_switcheroo.h
> +++ b/include/linux/vga_switcheroo.h
> @@ -128,7 +128,7 @@ int vga_switcheroo_register_client(struct pci_dev *dev,
>  				   bool driver_power_control);
>  int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
>  					 const struct vga_switcheroo_client_ops *ops,
> -					 int id, bool active);
> +					 int id);
>  
>  void vga_switcheroo_client_fb_set(struct pci_dev *dev,
>  				  struct fb_info *info);
> @@ -154,7 +154,7 @@ static inline void vga_switcheroo_client_fb_set(struct pci_dev *dev, struct fb_i
>  static inline int vga_switcheroo_register_handler(struct vga_switcheroo_handler *handler) { return 0; }
>  static inline int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
>  	const struct vga_switcheroo_client_ops *ops,
> -	int id, bool active) { return 0; }
> +	int id) { return 0; }
>  static inline void vga_switcheroo_unregister_handler(void) {}
>  static inline int vga_switcheroo_process_delayed_switch(void) { return 0; }
>  static inline int vga_switcheroo_get_client_state(struct pci_dev *dev) { return VGA_SWITCHEROO_ON; }
> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
> index c38c68f..e819013 100644
> --- a/sound/pci/hda/hda_intel.c
> +++ b/sound/pci/hda/hda_intel.c
> @@ -1143,8 +1143,7 @@ static int register_vga_switcheroo(struct azx *chip)
>  	 * is there any machine with two switchable HDMI audio controllers?
>  	 */
>  	err = vga_switcheroo_register_audio_client(chip->pci, &azx_vs_ops,
> -						    VGA_SWITCHEROO_DIS,
> -						    hda->probe_continued);
> +						   VGA_SWITCHEROO_DIS);
>  	if (err < 0)
>  		return err;
>  	hda->vga_switcheroo_registered = 1;
> -- 
> 1.8.5.2 (Apple Git-48)
> 
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