From: Lukas Wunner <lukas@xxxxxxxxx> [ Upstream commit 8948ca1a12c9a039361bbc3e4627064153971d57 ] If DRM drivers use runtime PM, they currently notify vga_switcheroo whenever they ->runtime_suspend or ->runtime_resume to update vga_switcheroo's internal power state tracking. That's essentially a duplication of a functionality performed by the PM core as it already tracks the GPU's power state and vga_switcheroo can always query it. Introduce a new internal helper vga_switcheroo_pwr_state() which does just that if runtime PM is used, or falls back to vga_switcheroo's internal power state tracking if manual power control is used. Drop a redundant power state check in set_audio_state() while at it. This removes one of the two purposes of the notification mechanism implemented by vga_switcheroo_set_dynamic_switch(). The other one is power management of the audio device and we'll remove that next. Cc: Dave Airlie <airlied@xxxxxxxxxx> Cc: Ben Skeggs <bskeggs@xxxxxxxxxx> Cc: Takashi Iwai <tiwai@xxxxxxx> Cc: Alex Deucher <alexander.deucher@xxxxxxx> Cc: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> Reviewed-by: Peter Wu <peter@xxxxxxxxxxxxx> Tested-by: Kai Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> # AMD PowerXpress Tested-by: Mike Lothian <mike@xxxxxxxxxxxxxx> # AMD PowerXpress Tested-by: Denis Lisov <dennis.lissov@xxxxxxxxx> # Nvidia Optimus Tested-by: Peter Wu <peter@xxxxxxxxxxxxx> # Nvidia Optimus Tested-by: Lukas Wunner <lukas@xxxxxxxxx> # MacBook Pro Signed-off-by: Lukas Wunner <lukas@xxxxxxxxx> Link: https://patchwork.freedesktop.org/patch/msgid/0aa49d735b988aa04524a8dc339582ace33f0f94.1520068884.git.lukas@xxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/vga/vga_switcheroo.c | 35 +++++++++++++++++++++----------- 1 file changed, 23 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c index 3cd153c6d271..5da45325621c 100644 --- a/drivers/gpu/vga/vga_switcheroo.c +++ b/drivers/gpu/vga/vga_switcheroo.c @@ -92,7 +92,8 @@ * struct vga_switcheroo_client - registered client * @pdev: client pci device * @fb_info: framebuffer to which console is remapped on switching - * @pwr_state: current power state + * @pwr_state: current power state if manual power control is used. + * For driver power control, call vga_switcheroo_pwr_state(). * @ops: client callbacks * @id: client identifier. Determining the id requires the handler, * so gpus are initially assigned VGA_SWITCHEROO_UNKNOWN_ID @@ -406,6 +407,19 @@ bool vga_switcheroo_client_probe_defer(struct pci_dev *pdev) } EXPORT_SYMBOL(vga_switcheroo_client_probe_defer); +static enum vga_switcheroo_state +vga_switcheroo_pwr_state(struct vga_switcheroo_client *client) +{ + if (client->driver_power_control) + if (pm_runtime_enabled(&client->pdev->dev) && + pm_runtime_active(&client->pdev->dev)) + return VGA_SWITCHEROO_ON; + else + return VGA_SWITCHEROO_OFF; + else + return client->pwr_state; +} + /** * vga_switcheroo_get_client_state() - obtain power state of a given client * @pdev: client pci device @@ -425,7 +439,7 @@ enum vga_switcheroo_state vga_switcheroo_get_client_state(struct pci_dev *pdev) if (!client) ret = VGA_SWITCHEROO_NOT_FOUND; else - ret = client->pwr_state; + ret = vga_switcheroo_pwr_state(client); mutex_unlock(&vgasr_mutex); return ret; } @@ -598,7 +612,7 @@ static int vga_switcheroo_show(struct seq_file *m, void *v) client_is_vga(client) ? "" : "-Audio", client->active ? '+' : ' ', client->driver_power_control ? "Dyn" : "", - client->pwr_state ? "Pwr" : "Off", + vga_switcheroo_pwr_state(client) ? "Pwr" : "Off", pci_name(client->pdev)); i++; } @@ -641,7 +655,7 @@ static void set_audio_state(enum vga_switcheroo_client_id id, struct vga_switcheroo_client *client; client = find_client_from_id(&vgasr_priv.clients, id | ID_BIT_AUDIO); - if (client && client->pwr_state != state) { + if (client) { client->ops->set_gpu_state(client->pdev, state); client->pwr_state = state; } @@ -656,7 +670,7 @@ static int vga_switchto_stage1(struct vga_switcheroo_client *new_client) if (!active) return 0; - if (new_client->pwr_state == VGA_SWITCHEROO_OFF) + if (vga_switcheroo_pwr_state(new_client) == VGA_SWITCHEROO_OFF) vga_switchon(new_client); vga_set_default_device(new_client->pdev); @@ -695,7 +709,7 @@ static int vga_switchto_stage2(struct vga_switcheroo_client *new_client) if (new_client->ops->reprobe) new_client->ops->reprobe(new_client->pdev); - if (active->pwr_state == VGA_SWITCHEROO_ON) + if (vga_switcheroo_pwr_state(active) == VGA_SWITCHEROO_ON) vga_switchoff(active); set_audio_state(new_client->id, VGA_SWITCHEROO_ON); @@ -940,8 +954,7 @@ EXPORT_SYMBOL(vga_switcheroo_process_delayed_switch); * command line disables it. * * When the driver decides to power up or down, it notifies vga_switcheroo - * thereof so that it can (a) power the audio device on the GPU up or down, - * and (b) update its internal power state representation for the device. + * thereof so that it can power the audio device on the GPU up or down. * This is achieved by vga_switcheroo_set_dynamic_switch(). * * After the GPU has been suspended, the handler needs to be called to cut @@ -985,9 +998,8 @@ static void vga_switcheroo_power_switch(struct pci_dev *pdev, * * Helper for GPUs whose power state is controlled by the driver's runtime pm. * When the driver decides to power up or down, it notifies vga_switcheroo - * thereof using this helper so that it can (a) power the audio device on - * the GPU up or down, and (b) update its internal power state representation - * for the device. + * thereof using this helper so that it can power the audio device on the GPU + * up or down. */ void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, enum vga_switcheroo_state dynamic) @@ -1001,7 +1013,6 @@ void vga_switcheroo_set_dynamic_switch(struct pci_dev *pdev, return; } - client->pwr_state = dynamic; set_audio_state(client->id, dynamic); mutex_unlock(&vgasr_mutex); } -- 2.25.1
