drm/radeon/kms: add support to atom parser for FB read/write
FB read/write really doesn't need to access the actual VRAM, we
can just use a scratch area. This is required for using atom displayport
calls later.
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/atom.c b/drivers/gpu/drm/radeon/atom.c
index d67c425..85abc08 100644
--- a/drivers/gpu/drm/radeon/atom.c
+++ b/drivers/gpu/drm/radeon/atom.c
@@ -263,10 +263,10 @@
case ATOM_ARG_FB:
idx = U8(*ptr);
(*ptr)++;
+ val = gctx->scratch[((gctx->fb_base + idx) / 4)];
if (print)
DEBUG("FB[0x%02X]", idx);
- printk(KERN_INFO "FB access is not implemented.\n");
- return 0;
+ break;
case ATOM_ARG_IMM:
switch (align) {
case ATOM_SRC_DWORD:
@@ -488,9 +488,9 @@
case ATOM_ARG_FB:
idx = U8(*ptr);
(*ptr)++;
+ gctx->scratch[((gctx->fb_base + idx) / 4)] = val;
DEBUG("FB[0x%02X]", idx);
- printk(KERN_INFO "FB access is not implemented.\n");
- return;
+ break;
case ATOM_ARG_PLL:
idx = U8(*ptr);
(*ptr)++;