@@ -63,6 +63,10 @@ bool amdgpu_has_atpx(void) {
return amdgpu_atpx_priv.atpx_detected;
}
+bool amdgpu_has_atpx_dgpu_power_cntl(void) {
+ return amdgpu_atpx_priv.atpx.functions.power_cntl;
+}
+
/**
* amdgpu_atpx_call - call an ATPX method
*
@@ -142,10 +146,6 @@ static void amdgpu_atpx_parse_functions(struct amdgpu_atpx_functions *f, u32 mas
*/
static int amdgpu_atpx_validate(struct amdgpu_atpx *atpx)
{
- /* make sure required functions are enabled */
- /* dGPU power control is required */
- atpx->functions.power_cntl = true;
-
if (atpx->functions.px_params) {
union acpi_object *info;
struct atpx_px_params output;
@@ -59,6 +59,12 @@ static const char *amdgpu_asic_name[] = {
"LAST",
};
+#if defined(CONFIG_VGA_SWITCHEROO)
+bool amdgpu_has_atpx_dgpu_power_cntl(void);
+#else
+static inline bool amdgpu_has_atpx_dgpu_power_cntl(void) { return false; }
+#endif
+
bool amdgpu_device_is_px(struct drm_device *dev)
{
struct amdgpu_device *adev = dev->dev_private;
@@ -1464,7 +1470,7 @@ int amdgpu_device_init(struct amdgpu_device *adev,
if (amdgpu_runtime_pm == 1)
runtime = true;
- if (amdgpu_device_is_px(ddev))
+ if (amdgpu_device_is_px(ddev) && amdgpu_has_atpx_dgpu_power_cntl())
runtime = true;
vga_switcheroo_register_client(adev->pdev, &amdgpu_switcheroo_ops, runtime);
if (runtime)
This is a note to let you know that I have just added a patch titled drm/amdgpu: disable runtime pm on PX laptops without dGPU power control to the linux-4.2.y-queue branch of the 4.2.y-ckt extended stable tree which can be found at: http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-4.2.y-queue This patch is scheduled to be released in version 4.2.8-ckt7. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 4.2.y-ckt tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ---8<------------------------------------------------------------ From 19ce0a86938a4a1b5df72e33b697bc4300312a36 Mon Sep 17 00:00:00 2001 From: Alex Deucher <alexander.deucher@amd.com> Date: Wed, 2 Mar 2016 12:10:20 -0500 Subject: drm/amdgpu: disable runtime pm on PX laptops without dGPU power control MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit bedf2a65c1aa8fb29ba8527fd00c0f68ec1f55f1 upstream. Some PX laptops don't provide an ACPI method to control dGPU power. On those systems, the driver is responsible for handling the dGPU power state. Disable runtime PM on them until support for this is implemented. Reviewed-by: Michel Dänzer <michel.daenzer@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/gpu/drm/amd/amdgpu/amdgpu_atpx_handler.c | 8 ++++---- drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 8 +++++++- 2 files changed, 11 insertions(+), 5 deletions(-) -- 2.7.4