drm/radeon/kms: detect sideport memory on IGP chips
This detects if the sideport memory is enabled and
if it is VRAM is evicted on suspend/resume.
This should fix s/r issues on some IGPs.
Signed-off-by: Alex Deucher <alexdeucher@gmail.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 58f3426..7914455 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -595,6 +595,20 @@
return false;
}
+bool radeon_combios_sideport_present(struct radeon_device *rdev)
+{
+ struct drm_device *dev = rdev->ddev;
+ u16 igp_info;
+
+ igp_info = combios_get_table_offset(dev, COMBIOS_INTEGRATED_SYSTEM_INFO_TABLE);
+
+ if (igp_info) {
+ if (RBIOS16(igp_info + 0x4))
+ return true;
+ }
+ return false;
+}
+
static const uint32_t default_primarydac_adj[CHIP_LAST] = {
0x00000808, /* r100 */
0x00000808, /* rv100 */