drm/radeon: add a PX quirk list

Some PX laptops seems to have problems turning the dGPU on/off.
Add a quirk list to disable runpm by default on those systems.
Also convert the current PX d3 delay handling to a quirk.

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=51381
https://bugzilla.kernel.org/show_bug.cgi?id=74551

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2 files changed, 51 insertions, 20 deletions

diff --git a/drivers/gpu/drm/radeon/radeon.h b/drivers/gpu/drm/radeon/radeon.h
index f9ffd98aa6a4..8d0ce11ef47b 100644
--- a/drivers/gpu/drm/radeon/radeon.h
+++ b/drivers/gpu/drm/radeon/radeon.h
@@ -2353,6 +2353,7 @@ struct radeon_device {
 
         struct dev_pm_domain vga_pm_domain;
         bool have_disp_power_ref;
+        u32 px_quirk_flags;
 
         /* tracking pinned memory */
         u64 vram_pin_size;
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index 61990bda285d..248bce86af51 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -103,6 +103,31 @@ static const char radeon_family_name[][16] = {
         "LAST",
 };
 
+#define RADEON_PX_QUIRK_DISABLE_PX  (1 << 0)
+#define RADEON_PX_QUIRK_LONG_WAKEUP (1 << 1)
+
+struct radeon_px_quirk {
+        u32 chip_vendor;
+        u32 chip_device;
+        u32 subsys_vendor;
+        u32 subsys_device;
+        u32 px_quirk_flags;
+};
+
+static struct radeon_px_quirk radeon_px_quirk_list[] = {
+        /* Acer aspire 5560g (CPU: AMD A4-3305M; GPU: AMD Radeon HD 6480g + 7470m)
+         * https://bugzilla.kernel.org/show_bug.cgi?id=74551
+         */
+        { PCI_VENDOR_ID_ATI, 0x6760, 0x1025, 0x0672, RADEON_PX_QUIRK_DISABLE_PX },
+        /* Asus K73TA laptop with AMD A6-3400M APU and Radeon 6550 GPU
+         * https://bugzilla.kernel.org/show_bug.cgi?id=51381
+         */
+        { PCI_VENDOR_ID_ATI, 0x6741, 0x1043, 0x108c, 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)
 {
         struct radeon_device *rdev = dev->dev_private;
@@ -112,6 +137,26 @@ bool radeon_is_px(struct drm_device *dev)
         return false;
 }
 
+static void radeon_device_handle_px_quirks(struct radeon_device *rdev)
+{
+        struct radeon_px_quirk *p = radeon_px_quirk_list;
+
+        /* Apply PX quirks */
+        while (p && p->chip_device != 0) {
+                if (rdev->pdev->vendor == p->chip_vendor &&
+                    rdev->pdev->device == p->chip_device &&
+                    rdev->pdev->subsystem_vendor == p->subsys_vendor &&
+                    rdev->pdev->subsystem_device == p->subsys_device) {
+                        rdev->px_quirk_flags = p->px_quirk_flags;
+                        break;
+                }
+                ++p;
+        }
+
+        if (rdev->px_quirk_flags & RADEON_PX_QUIRK_DISABLE_PX)
+                rdev->flags &= ~RADEON_IS_PX;
+}
+
 /**
  * radeon_program_register_sequence - program an array of registers.
  *
@@ -1093,25 +1138,6 @@ static void radeon_check_arguments(struct radeon_device *rdev)
 }
 
 /**
- * radeon_switcheroo_quirk_long_wakeup - return true if longer d3 delay is
- * needed for waking up.
- *
- * @pdev: pci dev pointer
- */
-static bool radeon_switcheroo_quirk_long_wakeup(struct pci_dev *pdev)
-{
-
-        /* 6600m in a macbook pro */
-        if (pdev->subsystem_vendor == PCI_VENDOR_ID_APPLE &&
-            pdev->subsystem_device == 0x00e2) {
-                printk(KERN_INFO "radeon: quirking longer d3 wakeup delay\n");
-                return true;
-        }
-
-        return false;
-}
-
-/**
  * radeon_switcheroo_set_state - set switcheroo state
  *
  * @pdev: pci dev pointer
@@ -1123,6 +1149,7 @@ static bool radeon_switcheroo_quirk_long_wakeup(struct pci_dev *pdev)
 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;
@@ -1134,7 +1161,7 @@ static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switchero
                 /* don't suspend or resume card normally */
                 dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
 
-                if (d3_delay < 20 && radeon_switcheroo_quirk_long_wakeup(pdev))
+                if (d3_delay < 20 && (rdev->px_quirk_flags & RADEON_PX_QUIRK_LONG_WAKEUP))
                         dev->pdev->d3_delay = 20;
 
                 radeon_resume_kms(dev, true, true);
@@ -1338,6 +1365,9 @@ int radeon_device_init(struct radeon_device *rdev,
         if (rdev->rio_mem == NULL)
                 DRM_ERROR("Unable to find PCI I/O BAR\n");
 
+        if (rdev->flags & RADEON_IS_PX)
+                radeon_device_handle_px_quirks(rdev);
+
         /* if we have > 1 VGA cards, then disable the radeon VGA resources */
         /* this will fail for cards that aren't VGA class devices, just
          * ignore it */