From 6d5c2d8ca3c15a191a8078316e547c1f4e5ad6eb Mon Sep 17 00:00:00 2001
From: Peter Wu <lekensteyn@gmail.com>
Date: Thu, 1 Aug 2013 18:21:28 +0200
Subject: [PATCH] i915: fix ACPI _DSM warning
Since commit 29a241c (ACPICA: Add argument typechecking for all
predefined ACPI names), _DSM parameters are validated which trigger the
following warning:
ACPI Warning: \_SB_.PCI0.GFX0._DSM: Argument #4 type mismatch - Found [Integer], ACPI requires [Package] (20130517/nsarguments-95)
ACPI Warning: \_SB_.PCI0.GFX0._DSM: Argument #4 type mismatch - Found [Integer], ACPI requires [Package] (20130517/nsarguments-95)
ACPI Warning: \_SB_.PCI0.P0P2.PEGP._DSM: Argument #4 type mismatch - Found [Integer], ACPI requires [Package] (20130517/nsarguments-95)
ACPI Warning: \_SB_.PCI0.P0P2.PEGP._DSM: Argument #4 type mismatch - Found [Integer], ACPI requires [Package] (20130517/nsarguments-95)
As the Intel _DSM method seems to ignore this parameter, let's comply to
the ACPI spec and use a Package instead.
Signed-off-by: Peter Wu <lekensteyn@gmail.com>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=32602
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---
drivers/gpu/drm/i915/intel_acpi.c | 14 ++++++++------
1 file changed, 8 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_acpi.c b/drivers/gpu/drm/i915/intel_acpi.c
index bcbbaea2a78e..57fe1ae32a0d 100644
--- a/drivers/gpu/drm/i915/intel_acpi.c
+++ b/drivers/gpu/drm/i915/intel_acpi.c
@@ -28,7 +28,7 @@ static const u8 intel_dsm_guid[] = {
0x0f, 0x13, 0x17, 0xb0, 0x1c, 0x2c
};
-static int intel_dsm(acpi_handle handle, int func, int arg)
+static int intel_dsm(acpi_handle handle, int func)
{
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_object_list input;
@@ -46,8 +46,9 @@ static int intel_dsm(acpi_handle handle, int func, int arg)
params[1].integer.value = INTEL_DSM_REVISION_ID;
params[2].type = ACPI_TYPE_INTEGER;
params[2].integer.value = func;
- params[3].type = ACPI_TYPE_INTEGER;
- params[3].integer.value = arg;
+ params[3].type = ACPI_TYPE_PACKAGE;
+ params[3].package.count = 0;
+ params[3].package.elements = NULL;
ret = acpi_evaluate_object(handle, "_DSM", &input, &output);
if (ret) {
@@ -151,8 +152,9 @@ static void intel_dsm_platform_mux_info(void)
params[1].integer.value = INTEL_DSM_REVISION_ID;
params[2].type = ACPI_TYPE_INTEGER;
params[2].integer.value = INTEL_DSM_FN_PLATFORM_MUX_INFO;
- params[3].type = ACPI_TYPE_INTEGER;
- params[3].integer.value = 0;
+ params[3].type = ACPI_TYPE_PACKAGE;
+ params[3].package.count = 0;
+ params[3].package.elements = NULL;
ret = acpi_evaluate_object(intel_dsm_priv.dhandle, "_DSM", &input,
&output);
@@ -205,7 +207,7 @@ static bool intel_dsm_pci_probe(struct pci_dev *pdev)
return false;
}
- ret = intel_dsm(dhandle, INTEL_DSM_FN_SUPPORTED_FUNCTIONS, 0);
+ ret = intel_dsm(dhandle, INTEL_DSM_FN_SUPPORTED_FUNCTIONS);
if (ret < 0) {
DRM_DEBUG_KMS("failed to get supported _DSM functions\n");
return false;
--
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