On Thu, Jun 28, 2018 at 2:22 AM, Jim Qu <Jim.Qu at amd.com> wrote:
> On modern laptop, there are more and more platforms
> have two GPUs, and each of them maybe have audio codec
> for HDMP/DP output. For some dGPU which is no output,
> audio codec usually is disabled.
>
> In currect HDA audio driver, it will set all codec as
> VGA_SWITCHEROO_DIS, so if system runtime pm is enabled,
> the audio which is binded to UMA will be suspended.
>
> In HDA driver side, it is difficult to know which GPU
> the audio has binded to. So set the bound gpu pci dev
> to vgaswitchroo, let vgaswitchroo make decision.
>
> Newer dGPUs use PCI_CLASS_DISPLAY_OTHER rather than
> PCI_CLASS_DISPLAY_VGA. Make sure we check for both when
> checking for the dGPU in get_bound_vga()
>
> The patch also combine the HDA change to avoid break
> building.
>
> Change-Id: I9906c1bd4dd5b36108d7133bb1cf724d13f1cd6d
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> Signed-off-by: Jim Qu <Jim.Qu at amd.com>
> ---
> drivers/gpu/vga/vga_switcheroo.c | 11 +++++++++--
> include/linux/vga_switcheroo.h | 4 ++--
> sound/pci/hda/hda_intel.c | 15 +++++++++------
> 3 files changed, 20 insertions(+), 10 deletions(-)
>
Please resend and send it to dri-devel and alsa-devel at alsa-project.org
since this patch touches multiple subsystems. I would propose we
merge this through the drm tree if possible.
Alex
> diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
> index fc4adf3..7b7b0fd 100644
> --- a/drivers/gpu/vga/vga_switcheroo.c
> +++ b/drivers/gpu/vga/vga_switcheroo.c
> @@ -329,7 +329,7 @@ EXPORT_SYMBOL(vga_switcheroo_register_client);
> * vga_switcheroo_register_audio_client - register audio client
> * @pdev: client pci device
> * @ops: client callbacks
> - * @id: client identifier
> + * @bound_vga: client bound vga pci device
> *
> * Register audio client (audio device on a GPU). The client is assumed
> * to use runtime PM. Beforehand, vga_switcheroo_client_probe_defer()
> @@ -339,8 +339,15 @@ EXPORT_SYMBOL(vga_switcheroo_register_client);
> */
> int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
> const struct vga_switcheroo_client_ops *ops,
> - enum vga_switcheroo_client_id id)
> + struct pci_dev *bound_vga)
> {
> + enum vga_switcheroo_client_id id = VGA_SWITCHEROO_DIS;
> +
> + if (bound_vga) {
> + if (vgasr_priv.handler->get_client_id)
> + id = vgasr_priv.handler->get_client_id(bound_vga);
> + }
> +
> return register_client(pdev, ops, id | ID_BIT_AUDIO, false, true);
> }
> EXPORT_SYMBOL(vga_switcheroo_register_audio_client);
> diff --git a/include/linux/vga_switcheroo.h b/include/linux/vga_switcheroo.h
> index 77f0f0a..a0c7b86 100644
> --- a/include/linux/vga_switcheroo.h
> +++ b/include/linux/vga_switcheroo.h
> @@ -151,7 +151,7 @@ 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,
> - enum vga_switcheroo_client_id id);
> + struct pci_dev *bound_vga);
>
> void vga_switcheroo_client_fb_set(struct pci_dev *dev,
> struct fb_info *info);
> @@ -180,7 +180,7 @@ static inline int vga_switcheroo_register_handler(const struct vga_switcheroo_ha
> enum vga_switcheroo_handler_flags_t handler_flags) { return 0; }
> static inline int vga_switcheroo_register_audio_client(struct pci_dev *pdev,
> const struct vga_switcheroo_client_ops *ops,
> - enum vga_switcheroo_client_id id) { return 0; }
> + struct pci_dev *bound_vga) { return 0; }
> static inline void vga_switcheroo_unregister_handler(void) {}
> static inline enum vga_switcheroo_handler_flags_t vga_switcheroo_handler_flags(void) { return 0; }
> static inline int vga_switcheroo_lock_ddc(struct pci_dev *pdev) { return -ENODEV; }
> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
> index 1ae1850..8f992e6 100644
> --- a/sound/pci/hda/hda_intel.c
> +++ b/sound/pci/hda/hda_intel.c
> @@ -1319,15 +1319,17 @@ static const struct vga_switcheroo_client_ops azx_vs_ops = {
> static int register_vga_switcheroo(struct azx *chip)
> {
> struct hda_intel *hda = container_of(chip, struct hda_intel, chip);
> + struct pci_dev *p;
> int err;
>
> if (!hda->use_vga_switcheroo)
> return 0;
> - /* FIXME: currently only handling DIS controller
> - * is there any machine with two switchable HDMI audio controllers?
> - */
> - err = vga_switcheroo_register_audio_client(chip->pci, &azx_vs_ops,
> - VGA_SWITCHEROO_DIS);
> +
> + p = get_bound_vga(chip->pci);
> + err = vga_switcheroo_register_audio_client(chip->pci, &azx_vs_ops, p);
> +
> + if (p)
> + pci_dev_put(p);
> if (err < 0)
> return err;
> hda->vga_switcheroo_registered = 1;
> @@ -1429,7 +1431,8 @@ static struct pci_dev *get_bound_vga(struct pci_dev *pci)
> p = pci_get_domain_bus_and_slot(pci_domain_nr(pci->bus),
> pci->bus->number, 0);
> if (p) {
> - if ((p->class >> 8) == PCI_CLASS_DISPLAY_VGA)
> + if ((p->class >> 8) == PCI_CLASS_DISPLAY_VGA ||
> + (p->class >> 8) == PCI_CLASS_DISPLAY_OTHER)
> return p;
> pci_dev_put(p);
> }
> --
> 2.7.4
>
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