mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
ACPI / nouveau: replace open-coded _DSM code with helper functions
Use helper functions to simplify _DSM related code in nouveau driver. After analyzing the ACPI _DSM related code, I changed nouveau_optimus_dsm() to expect a buffer and nouveau_dsm() to expect an integer only. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
parent
4988d0aeb6
commit
b072e53b0a
2 changed files with 53 additions and 129 deletions
|
@ -87,55 +87,39 @@ mxm_shadow_dsm(struct nouveau_mxm *mxm, u8 version)
|
|||
0xB8, 0x9C, 0x79, 0xB6, 0x2F, 0xD5, 0x56, 0x65
|
||||
};
|
||||
u32 mxms_args[] = { 0x00000000 };
|
||||
union acpi_object args[4] = {
|
||||
/* _DSM MUID */
|
||||
{ .buffer.type = 3,
|
||||
.buffer.length = sizeof(muid),
|
||||
.buffer.pointer = muid,
|
||||
},
|
||||
/* spec says this can be zero to mean "highest revision", but
|
||||
* of course there's at least one bios out there which fails
|
||||
* unless you pass in exactly the version it supports..
|
||||
*/
|
||||
{ .integer.type = ACPI_TYPE_INTEGER,
|
||||
.integer.value = (version & 0xf0) << 4 | (version & 0x0f),
|
||||
},
|
||||
/* MXMS function */
|
||||
{ .integer.type = ACPI_TYPE_INTEGER,
|
||||
.integer.value = 0x00000010,
|
||||
},
|
||||
/* Pointer to MXMS arguments */
|
||||
{ .buffer.type = ACPI_TYPE_BUFFER,
|
||||
.buffer.length = sizeof(mxms_args),
|
||||
.buffer.pointer = (char *)mxms_args,
|
||||
},
|
||||
union acpi_object argv4 = {
|
||||
.buffer.type = ACPI_TYPE_BUFFER,
|
||||
.buffer.length = sizeof(mxms_args),
|
||||
.buffer.pointer = (char *)mxms_args,
|
||||
};
|
||||
struct acpi_object_list list = { ARRAY_SIZE(args), args };
|
||||
struct acpi_buffer retn = { ACPI_ALLOCATE_BUFFER, NULL };
|
||||
union acpi_object *obj;
|
||||
acpi_handle handle;
|
||||
int ret;
|
||||
int rev;
|
||||
|
||||
handle = ACPI_HANDLE(&device->pdev->dev);
|
||||
if (!handle)
|
||||
return false;
|
||||
|
||||
ret = acpi_evaluate_object(handle, "_DSM", &list, &retn);
|
||||
if (ret) {
|
||||
nv_debug(mxm, "DSM MXMS failed: %d\n", ret);
|
||||
/*
|
||||
* spec says this can be zero to mean "highest revision", but
|
||||
* of course there's at least one bios out there which fails
|
||||
* unless you pass in exactly the version it supports..
|
||||
*/
|
||||
rev = (version & 0xf0) << 4 | (version & 0x0f);
|
||||
obj = acpi_evaluate_dsm(handle, muid, rev, 0x00000010, &argv4);
|
||||
if (!obj) {
|
||||
nv_debug(mxm, "DSM MXMS failed\n");
|
||||
return false;
|
||||
}
|
||||
|
||||
obj = retn.pointer;
|
||||
if (obj->type == ACPI_TYPE_BUFFER) {
|
||||
mxm->mxms = kmemdup(obj->buffer.pointer,
|
||||
obj->buffer.length, GFP_KERNEL);
|
||||
} else
|
||||
if (obj->type == ACPI_TYPE_INTEGER) {
|
||||
} else if (obj->type == ACPI_TYPE_INTEGER) {
|
||||
nv_debug(mxm, "DSM MXMS returned 0x%llx\n", obj->integer.value);
|
||||
}
|
||||
|
||||
kfree(obj);
|
||||
ACPI_FREE(obj);
|
||||
return mxm->mxms != NULL;
|
||||
}
|
||||
#endif
|
||||
|
|
|
@ -78,127 +78,66 @@ static const char nouveau_op_dsm_muid[] = {
|
|||
|
||||
static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
|
||||
{
|
||||
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
|
||||
struct acpi_object_list input;
|
||||
union acpi_object params[4];
|
||||
int i;
|
||||
union acpi_object *obj;
|
||||
int i, err;
|
||||
char args_buff[4];
|
||||
union acpi_object argv4 = {
|
||||
.buffer.type = ACPI_TYPE_BUFFER,
|
||||
.buffer.length = 4,
|
||||
.buffer.pointer = args_buff
|
||||
};
|
||||
|
||||
input.count = 4;
|
||||
input.pointer = params;
|
||||
params[0].type = ACPI_TYPE_BUFFER;
|
||||
params[0].buffer.length = sizeof(nouveau_op_dsm_muid);
|
||||
params[0].buffer.pointer = (char *)nouveau_op_dsm_muid;
|
||||
params[1].type = ACPI_TYPE_INTEGER;
|
||||
params[1].integer.value = 0x00000100;
|
||||
params[2].type = ACPI_TYPE_INTEGER;
|
||||
params[2].integer.value = func;
|
||||
params[3].type = ACPI_TYPE_BUFFER;
|
||||
params[3].buffer.length = 4;
|
||||
/* ACPI is little endian, AABBCCDD becomes {DD,CC,BB,AA} */
|
||||
for (i = 0; i < 4; i++)
|
||||
args_buff[i] = (arg >> i * 8) & 0xFF;
|
||||
params[3].buffer.pointer = args_buff;
|
||||
|
||||
err = acpi_evaluate_object(handle, "_DSM", &input, &output);
|
||||
if (err) {
|
||||
printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
obj = (union acpi_object *)output.pointer;
|
||||
|
||||
if (obj->type == ACPI_TYPE_INTEGER)
|
||||
if (obj->integer.value == 0x80000002) {
|
||||
kfree(output.pointer);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (obj->type == ACPI_TYPE_BUFFER) {
|
||||
if (obj->buffer.length == 4 && result) {
|
||||
*result = 0;
|
||||
*result = 0;
|
||||
obj = acpi_evaluate_dsm_typed(handle, nouveau_op_dsm_muid, 0x00000100,
|
||||
func, &argv4, ACPI_TYPE_BUFFER);
|
||||
if (!obj) {
|
||||
acpi_handle_info(handle, "failed to evaluate _DSM\n");
|
||||
return AE_ERROR;
|
||||
} else {
|
||||
if (obj->buffer.length == 4) {
|
||||
*result |= obj->buffer.pointer[0];
|
||||
*result |= (obj->buffer.pointer[1] << 8);
|
||||
*result |= (obj->buffer.pointer[2] << 16);
|
||||
*result |= (obj->buffer.pointer[3] << 24);
|
||||
}
|
||||
ACPI_FREE(obj);
|
||||
}
|
||||
|
||||
kfree(output.pointer);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nouveau_dsm(acpi_handle handle, int func, int arg, uint32_t *result)
|
||||
static int nouveau_dsm(acpi_handle handle, int func, int arg)
|
||||
{
|
||||
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
|
||||
struct acpi_object_list input;
|
||||
union acpi_object params[4];
|
||||
int ret = 0;
|
||||
union acpi_object *obj;
|
||||
int err;
|
||||
union acpi_object argv4 = {
|
||||
.integer.type = ACPI_TYPE_INTEGER,
|
||||
.integer.value = arg,
|
||||
};
|
||||
|
||||
input.count = 4;
|
||||
input.pointer = params;
|
||||
params[0].type = ACPI_TYPE_BUFFER;
|
||||
params[0].buffer.length = sizeof(nouveau_dsm_muid);
|
||||
params[0].buffer.pointer = (char *)nouveau_dsm_muid;
|
||||
params[1].type = ACPI_TYPE_INTEGER;
|
||||
params[1].integer.value = 0x00000102;
|
||||
params[2].type = ACPI_TYPE_INTEGER;
|
||||
params[2].integer.value = func;
|
||||
params[3].type = ACPI_TYPE_INTEGER;
|
||||
params[3].integer.value = arg;
|
||||
|
||||
err = acpi_evaluate_object(handle, "_DSM", &input, &output);
|
||||
if (err) {
|
||||
printk(KERN_INFO "failed to evaluate _DSM: %d\n", err);
|
||||
return err;
|
||||
obj = acpi_evaluate_dsm_typed(handle, nouveau_dsm_muid, 0x00000102,
|
||||
func, &argv4, ACPI_TYPE_INTEGER);
|
||||
if (!obj) {
|
||||
acpi_handle_info(handle, "failed to evaluate _DSM\n");
|
||||
return AE_ERROR;
|
||||
} else {
|
||||
if (obj->integer.value == 0x80000002)
|
||||
ret = -ENODEV;
|
||||
ACPI_FREE(obj);
|
||||
}
|
||||
|
||||
obj = (union acpi_object *)output.pointer;
|
||||
|
||||
if (obj->type == ACPI_TYPE_INTEGER)
|
||||
if (obj->integer.value == 0x80000002) {
|
||||
kfree(output.pointer);
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
if (obj->type == ACPI_TYPE_BUFFER) {
|
||||
if (obj->buffer.length == 4 && result) {
|
||||
*result = 0;
|
||||
*result |= obj->buffer.pointer[0];
|
||||
*result |= (obj->buffer.pointer[1] << 8);
|
||||
*result |= (obj->buffer.pointer[2] << 16);
|
||||
*result |= (obj->buffer.pointer[3] << 24);
|
||||
}
|
||||
}
|
||||
|
||||
kfree(output.pointer);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Returns 1 if a DSM function is usable and 0 otherwise */
|
||||
static int nouveau_test_dsm(acpi_handle test_handle,
|
||||
int (*dsm_func)(acpi_handle, int, int, uint32_t *),
|
||||
int sfnc)
|
||||
{
|
||||
u32 result = 0;
|
||||
|
||||
/* Function 0 returns a Buffer containing available functions. The args
|
||||
* parameter is ignored for function 0, so just put 0 in it */
|
||||
if (dsm_func(test_handle, 0, 0, &result))
|
||||
return 0;
|
||||
|
||||
/* ACPI Spec v4 9.14.1: if bit 0 is zero, no function is supported. If
|
||||
* the n-th bit is enabled, function n is supported */
|
||||
return result & 1 && result & (1 << sfnc);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int nouveau_dsm_switch_mux(acpi_handle handle, int mux_id)
|
||||
{
|
||||
mxm_wmi_call_mxmx(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
|
||||
mxm_wmi_call_mxds(mux_id == NOUVEAU_DSM_LED_STAMINA ? MXM_MXDS_ADAPTER_IGD : MXM_MXDS_ADAPTER_0);
|
||||
return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id, NULL);
|
||||
return nouveau_dsm(handle, NOUVEAU_DSM_LED, mux_id);
|
||||
}
|
||||
|
||||
static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switcheroo_state state)
|
||||
|
@ -208,7 +147,7 @@ static int nouveau_dsm_set_discrete_state(acpi_handle handle, enum vga_switchero
|
|||
arg = NOUVEAU_DSM_POWER_SPEED;
|
||||
else
|
||||
arg = NOUVEAU_DSM_POWER_STAMINA;
|
||||
nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg, NULL);
|
||||
nouveau_dsm(handle, NOUVEAU_DSM_POWER, arg);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
@ -268,11 +207,12 @@ static int nouveau_dsm_pci_probe(struct pci_dev *pdev)
|
|||
nouveau_dsm_priv.other_handle = dhandle;
|
||||
return false;
|
||||
}
|
||||
if (nouveau_test_dsm(dhandle, nouveau_dsm, NOUVEAU_DSM_POWER))
|
||||
if (acpi_check_dsm(dhandle, nouveau_dsm_muid, 0x00000102,
|
||||
1 << NOUVEAU_DSM_POWER))
|
||||
retval |= NOUVEAU_DSM_HAS_MUX;
|
||||
|
||||
if (nouveau_test_dsm(dhandle, nouveau_optimus_dsm,
|
||||
NOUVEAU_DSM_OPTIMUS_CAPS))
|
||||
if (acpi_check_dsm(dhandle, nouveau_op_dsm_muid, 0x00000100,
|
||||
1 << NOUVEAU_DSM_OPTIMUS_CAPS))
|
||||
retval |= NOUVEAU_DSM_HAS_OPT;
|
||||
|
||||
if (retval & NOUVEAU_DSM_HAS_OPT) {
|
||||
|
|
Loading…
Reference in a new issue