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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>
This commit is contained in:
Dave Airlie 2009-11-17 06:29:46 +10:00
parent f846761853
commit d904ef9b00
3 changed files with 8 additions and 4 deletions
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8
drivers/gpu/drm/radeon/atom.c
View File

@ -263,10 +263,10 @@ static uint32_t atom_get_src_int(atom_exec_context *ctx, uint8_t attr,
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 @@ static void atom_put_dst(atom_exec_context *ctx, int arg, uint8_t attr,
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)++;

2
drivers/gpu/drm/radeon/atom.h
View File

@ -132,6 +132,7 @@ struct atom_context {
uint8_t shift;
int cs_equal, cs_above;
int io_mode;
uint32_t *scratch;
};
extern int atom_debug;
@ -142,6 +143,7 @@ int atom_asic_init(struct atom_context *);
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"

2
drivers/gpu/drm/radeon/radeon_device.c
View File

@ -481,11 +481,13 @@ int radeon_atombios_init(struct radeon_device *rdev)
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);
}