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_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index 1834035..fa82ca7 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -938,6 +938,43 @@
return false;
}
+union igp_info {
+ struct _ATOM_INTEGRATED_SYSTEM_INFO info;
+ struct _ATOM_INTEGRATED_SYSTEM_INFO_V2 info_2;
+};
+
+bool radeon_atombios_sideport_present(struct radeon_device *rdev)
+{
+ struct radeon_mode_info *mode_info = &rdev->mode_info;
+ int index = GetIndexIntoMasterTable(DATA, IntegratedSystemInfo);
+ union igp_info *igp_info;
+ u8 frev, crev;
+ u16 data_offset;
+
+ atom_parse_data_header(mode_info->atom_context, index, NULL, &frev,
+ &crev, &data_offset);
+
+ igp_info = (union igp_info *)(mode_info->atom_context->bios +
+ data_offset);
+
+ if (igp_info) {
+ switch (crev) {
+ case 1:
+ if (igp_info->info.ucMemoryType & 0xf0)
+ return true;
+ break;
+ case 2:
+ if (igp_info->info_2.ucMemoryType & 0x0f)
+ return true;
+ break;
+ default:
+ DRM_ERROR("Unsupported IGP table: %d %d\n", frev, crev);
+ break;
+ }
+ }
+ return false;
+}
+
bool radeon_atombios_get_tmds_info(struct radeon_encoder *encoder,
struct radeon_encoder_int_tmds *tmds)
{