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)++;
diff --git a/drivers/gpu/drm/radeon/atom.h b/drivers/gpu/drm/radeon/atom.h
index e6eb38f..6671848 100644
--- a/drivers/gpu/drm/radeon/atom.h
+++ b/drivers/gpu/drm/radeon/atom.h
@@ -132,6 +132,7 @@
uint8_t shift;
int cs_equal, cs_above;
int io_mode;
+ uint32_t *scratch;
};
extern int atom_debug;
@@ -142,6 +143,7 @@
void atom_destroy(struct atom_context *);
void atom_parse_data_header(struct atom_context *ctx, int index, uint16_t *size, uint8_t *frev, uint8_t *crev, uint16_t *data_start);
void atom_parse_cmd_header(struct atom_context *ctx, int index, uint8_t *frev, uint8_t *crev);
+int atom_allocate_fb_scratch(struct atom_context *ctx);
#include "atom-types.h"
#include "atombios.h"
#include "ObjectID.h"
diff --git a/drivers/gpu/drm/radeon/radeon_device.c b/drivers/gpu/drm/radeon/radeon_device.c
index a014ba4..60ee6a8 100644
--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -481,11 +481,13 @@
rdev->mode_info.atom_context = atom_parse(atom_card_info, rdev->bios);
radeon_atom_initialize_bios_scratch_regs(rdev->ddev);
+ atom_allocate_fb_scratch(rdev->mode_info.atom_context);
return 0;
}
void radeon_atombios_fini(struct radeon_device *rdev)
{
+ kfree(rdev->mode_info.atom_context->scratch);
kfree(rdev->mode_info.atom_context);
kfree(rdev->mode_info.atom_card_info);
}