drm/radeon/kms: add thermal chip quirk for asus 9600xt

The board has an lm63 compatible thermal chip, but no
thermal chip entry in the vbios tables.

Fixes:
https://bugs.freedesktop.org/show_bug.cgi?id=39513

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index a74217cd192fed2facc49f8ae65f2367dff212d4..e0138b674aca038e99b020000cdfec0285aef405 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -2557,6 +2557,7 @@ void radeon_combios_get_power_modes(struct radeon_device *rdev)
        u16 offset, misc, misc2 = 0;
        u8 rev, blocks, tmp;
        int state_index = 0;
+       struct radeon_i2c_bus_rec i2c_bus;
 
        rdev->pm.default_power_state_index = -1;
 
@@ -2575,7 +2576,6 @@ void radeon_combios_get_power_modes(struct radeon_device *rdev)
        offset = combios_get_table_offset(dev, COMBIOS_OVERDRIVE_INFO_TABLE);
        if (offset) {
                u8 thermal_controller = 0, gpio = 0, i2c_addr = 0, clk_bit = 0, data_bit = 0;
-               struct radeon_i2c_bus_rec i2c_bus;
 
                rev = RBIOS8(offset);
 
@@ -2617,6 +2617,25 @@ void radeon_combios_get_power_modes(struct radeon_device *rdev)
                                i2c_new_device(&rdev->pm.i2c_bus->adapter, &info);
                        }
                }
+       } else {
+               /* boards with a thermal chip, but no overdrive table */
+
+               /* Asus 9600xt has an f75375 on the monid bus */
+               if ((dev->pdev->device == 0x4152) &&
+                   (dev->pdev->subsystem_vendor == 0x1043) &&
+                   (dev->pdev->subsystem_device == 0xc002)) {
+                       i2c_bus = combios_setup_i2c_bus(rdev, DDC_MONID, 0, 0);
+                       rdev->pm.i2c_bus = radeon_i2c_lookup(rdev, &i2c_bus);
+                       if (rdev->pm.i2c_bus) {
+                               struct i2c_board_info info = { };
+                               const char *name = "f75375";
+                               info.addr = 0x28;
+                               strlcpy(info.type, name, sizeof(info.type));
+                               i2c_new_device(&rdev->pm.i2c_bus->adapter, &info);
+                               DRM_INFO("Possible %s thermal controller at 0x%02x\n",
+                                        name, info.addr);
+                       }
+               }
        }
 
        if (rdev->flags & RADEON_IS_MOBILITY) {