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Subject[PATCH v1 2/2] drm/radeon: make MacBook Pro d3_delay quirk more generic
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The PCI Power Management Spec, r1.2, sec 5.6.1, requires a 10 millisecond
delay when powering on a device, i.e., transitioning from state D3hot to
D0.

Apparently some devices require more time, and d1f9809ed131 ("drm/radeon:
add quirk for d3 delay during switcheroo poweron for apple macbooks") added
an additional delay for the Radeon device in a MacBook Pro. 4807c5a8a0c8
("drm/radeon: add a PX quirk list") made the affected device more explicit.

Add a generic PCI quirk to increase the d3_delay. This means we will use
the additional delay for *all* wakeups from D3, not just those initiated by
radeon_switcheroo_set_state().

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
CC: Maarten Lankhorst <maarten.lankhorst@canonical.com>
---
drivers/gpu/drm/radeon/radeon_device.c | 12 ------------
drivers/pci/quirks.c | 13 +++++++++++++
2 files changed, 13 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 8a1df2a1afbd..8b8fd981cae5 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -113,7 +113,6 @@ static inline bool radeon_is_atpx_hybrid(void) { return false; }
#endif

#define RADEON_PX_QUIRK_DISABLE_PX (1 << 0)
-#define RADEON_PX_QUIRK_LONG_WAKEUP (1 << 1)

struct radeon_px_quirk {
u32 chip_vendor;
@@ -136,9 +135,6 @@ static struct radeon_px_quirk radeon_px_quirk_list[] = {
* https://bugzilla.kernel.org/show_bug.cgi?id=51381
*/
{ PCI_VENDOR_ID_ATI, 0x6840, 0x1043, 0x2122, RADEON_PX_QUIRK_DISABLE_PX },
- /* macbook pro 8.2 */
- { PCI_VENDOR_ID_ATI, 0x6741, PCI_VENDOR_ID_APPLE, 0x00e2, RADEON_PX_QUIRK_LONG_WAKEUP },
- { 0, 0, 0, 0, 0 },
};

bool radeon_is_px(struct drm_device *dev)
@@ -1241,25 +1237,17 @@ static void radeon_check_arguments(struct radeon_device *rdev)
static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
{
struct drm_device *dev = pci_get_drvdata(pdev);
- struct radeon_device *rdev = dev->dev_private;

if (radeon_is_px(dev) && state == VGA_SWITCHEROO_OFF)
return;

if (state == VGA_SWITCHEROO_ON) {
- unsigned d3_delay = dev->pdev->d3_delay;
-
printk(KERN_INFO "radeon: switched on\n");
/* don't suspend or resume card normally */
dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;

- if (d3_delay < 20 && (rdev->px_quirk_flags & RADEON_PX_QUIRK_LONG_WAKEUP))
- dev->pdev->d3_delay = 20;
-
radeon_resume_kms(dev, true, true);

- dev->pdev->d3_delay = d3_delay;
-
dev->switch_power_state = DRM_SWITCH_POWER_ON;
drm_kms_helper_poll_enable(dev);
} else {
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 1800befa8b8b..512d7a875d62 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1683,6 +1683,19 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2609, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260a, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260b, quirk_intel_pcie_pm);

+static void quirk_radeon_pm(struct pci_dev *dev)
+{
+ if (dev->subsystem_vendor == PCI_VENDOR_ID_APPLE &&
+ dev->subsystem_device == 0x00e2) {
+ if (dev->d3_delay < 20) {
+ dev->d3_delay = 20;
+ dev_info(&dev->dev, "extending delay after power-on from D3 to %d msec\n",
+ dev->d3_delay);
+ }
+ }
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6741, quirk_radeon_pm);
+
#ifdef CONFIG_X86_IO_APIC
/*
* Boot interrupts on some chipsets cannot be turned off. For these chipsets,
\
 
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