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vga_switcheroo: Use VGA_SWITCHEROO_UNKNOWN_ID instead of -1

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Signed-off-by: Lukas Wunner <lukas@wunner.de>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Lukas Wunner 2015-08-28 13:30:32 +02:00 committed by Daniel Vetter
parent 203d027de4
commit 21c5ba8c1e
2 changed files with 13 additions and 8 deletions
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17
drivers/gpu/vga/vga_switcheroo.c
View File

@ -84,9 +84,9 @@
* @fb_info: framebuffer to which console is remapped on switching
* @pwr_state: current power state
* @ops: client callbacks
* @id: client identifier, see enum vga_switcheroo_client_id.
* Determining the id requires the handler, so GPUs are initially
* assigned -1 and later given their true id in vga_switcheroo_enable()
* @id: client identifier. Determining the id requires the handler,
* so gpus are initially assigned VGA_SWITCHEROO_UNKNOWN_ID
* and later given their true id in vga_switcheroo_enable()
* @active: whether the outputs are currently switched to this client
* @driver_power_control: whether power state is controlled by the driver's
* runtime pm. If true, writing ON and OFF to the vga_switcheroo debugfs
@ -145,7 +145,8 @@ struct vgasr_priv {
#define ID_BIT_AUDIO 0x100
#define client_is_audio(c) ((c)->id & ID_BIT_AUDIO)
#define client_is_vga(c) ((c)->id == -1 || !client_is_audio(c))
#define client_is_vga(c) ((c)->id == VGA_SWITCHEROO_UNKNOWN_ID || \
!client_is_audio(c))
#define client_id(c) ((c)->id & ~ID_BIT_AUDIO)
static int vga_switcheroo_debugfs_init(struct vgasr_priv *priv);
@ -173,7 +174,7 @@ static void vga_switcheroo_enable(void)
vgasr_priv.handler->init();
list_for_each_entry(client, &vgasr_priv.clients, list) {
if (client->id != -1)
if (client->id != VGA_SWITCHEROO_UNKNOWN_ID)
continue;
ret = vgasr_priv.handler->get_client_id(client->pdev);
if (ret < 0)
@ -277,7 +278,7 @@ int vga_switcheroo_register_client(struct pci_dev *pdev,
const struct vga_switcheroo_client_ops *ops,
bool driver_power_control)
{
return register_client(pdev, ops, -1,
return register_client(pdev, ops, VGA_SWITCHEROO_UNKNOWN_ID,
pdev == vga_default_device(),
driver_power_control);
}
@ -583,7 +584,7 @@ vga_switcheroo_debugfs_write(struct file *filp, const char __user *ubuf,
int ret;
bool delay = false, can_switch;
bool just_mux = false;
int client_id = -1;
int client_id = VGA_SWITCHEROO_UNKNOWN_ID;
struct vga_switcheroo_client *client = NULL;
if (cnt > 63)
@ -652,7 +653,7 @@ vga_switcheroo_debugfs_write(struct file *filp, const char __user *ubuf,
client_id = VGA_SWITCHEROO_DIS;
}
if (client_id == -1)
if (client_id == VGA_SWITCHEROO_UNKNOWN_ID)
goto out;
client = find_client_from_id(&vgasr_priv.clients, client_id);
if (!client)

4
include/linux/vga_switcheroo.h
View File

@ -59,6 +59,9 @@ enum vga_switcheroo_state {
/**
* enum vga_switcheroo_client_id - client identifier
* @VGA_SWITCHEROO_UNKNOWN_ID: initial identifier assigned to vga clients.
* Determining the id requires the handler, so GPUs are given their
* true id in a delayed fashion in vga_switcheroo_enable()
* @VGA_SWITCHEROO_IGD: integrated graphics device
* @VGA_SWITCHEROO_DIS: discrete graphics device
* @VGA_SWITCHEROO_MAX_CLIENTS: currently no more than two GPUs are supported
@ -66,6 +69,7 @@ enum vga_switcheroo_state {
* Client identifier. Audio clients use the same identifier & 0x100.
*/
enum vga_switcheroo_client_id {
VGA_SWITCHEROO_UNKNOWN_ID = -1,
VGA_SWITCHEROO_IGD,
VGA_SWITCHEROO_DIS,
VGA_SWITCHEROO_MAX_CLIENTS,