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| author | Peter Wu <peter@lekensteyn.nl> | 2016-05-24 18:12:57 +0200 |
|---|---|---|
| committer | Peter Wu <peter@lekensteyn.nl> | 2016-05-30 16:16:41 +0200 |
| commit | b3f2c7fad4f8b16b48f36ec1f96e46395340effa (patch) | |
| tree | e63fdf9cce13199160940e35d67b4ebcd78ecf1a | |
| parent | c3a7aeb6b3e57c81709372b1d5e7d849259ebfdb (diff) | |
| download | linux-b3f2c7fad4f8b16b48f36ec1f96e46395340effa.tar.gz | |
drm/nouveau/acpi: return supported DSM functions
Return the set of supported functions to the caller. No functional
changes.
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_acpi.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c index 2c80c7efc78f..915c5449cb24 100644 --- a/drivers/gpu/drm/nouveau/nouveau_acpi.c +++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c @@ -107,7 +107,7 @@ static int nouveau_optimus_dsm(acpi_handle handle, int func, int arg, uint32_t * * requirements on the fourth parameter, so a private implementation * instead of using acpi_check_dsm(). */ -static int nouveau_check_optimus_dsm(acpi_handle handle) +static int nouveau_dsm_get_optimus_functions(acpi_handle handle) { int result; @@ -122,7 +122,9 @@ static int nouveau_check_optimus_dsm(acpi_handle handle) * 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 << NOUVEAU_DSM_OPTIMUS_CAPS); + if (result & 1 && result & (1 << NOUVEAU_DSM_OPTIMUS_CAPS)) + return result; + return 0; } static int nouveau_dsm(acpi_handle handle, int func, int arg) @@ -214,7 +216,7 @@ static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out { acpi_handle dhandle; bool supports_mux; - bool supports_opt; + int optimus_funcs; dhandle = ACPI_HANDLE(&pdev->dev); if (!dhandle) @@ -225,17 +227,17 @@ static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out supports_mux = acpi_check_dsm(dhandle, nouveau_dsm_muid, 0x00000102, 1 << NOUVEAU_DSM_POWER); - supports_opt = nouveau_check_optimus_dsm(dhandle); + optimus_funcs = nouveau_dsm_get_optimus_functions(dhandle); /* Does not look like a Nvidia device. */ - if (!supports_mux && !supports_opt) + if (!supports_mux && !optimus_funcs) return; *dhandle_out = dhandle; *has_mux = supports_mux; - *has_opt = supports_opt; + *has_opt = !!optimus_funcs; - if (supports_opt) { + if (optimus_funcs) { uint32_t result; nouveau_optimus_dsm(dhandle, NOUVEAU_DSM_OPTIMUS_CAPS, 0, &result); |