drm/radeon/kms: fix i2c map for rv250/280

Those chips have crt2_ddc bus.

Fixes:
https://bugzilla.kernel.org/show_bug.cgi?id=39672

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@kernel.org
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 e459467..a74217c 100644 (file)
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -779,7 +779,8 @@ void radeon_combios_i2c_init(struct radeon_device *rdev)
                                }
                        }
                }
-       } else if (rdev->family >= CHIP_R200) {
+       } else if ((rdev->family == CHIP_R200) ||
+                  (rdev->family >= CHIP_R300)) {
                /* 0x68 */
                i2c = combios_setup_i2c_bus(rdev, DDC_MONID, 0, 0);
                rdev->i2c_bus[3] = radeon_i2c_create(dev, &i2c, "MONID");