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drm/amd/display: Get fb base and fb offset for DMUB from registers

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[Why]
Under some hardware initialization sequences the fb base/fb offset
provided can be zero or hardwareinit can happen too late.

We want to ensure that we always have the correct fb_base/fb_offset
when performing DMCUB hardware initialization so we can do DMCUB
command table offloading during first dc hardware init.

[How]
Read from the DCN registers. VBIOS already filled these in for us.

Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Wesley Chalmers <Wesley.Chalmers@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nicholas Kazlauskas
2020-01-06 10:29:13 -05:00
committed by Alex Deucher
parent 07d4f90532
commit 153ca76021
3 changed files with 27 additions and 4 deletions
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21
drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.c
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@@ -54,6 +54,19 @@ const struct dmub_srv_common_regs dmub_srv_dcn20_regs = {
/* Shared functions. */
static void dmub_dcn20_get_fb_base_offset(struct dmub_srv *dmub,
uint64_t *fb_base,
uint64_t *fb_offset)
{
uint32_t tmp;
REG_GET(DCN_VM_FB_LOCATION_BASE, FB_BASE, &tmp);
*fb_base = (uint64_t)tmp << 24;
REG_GET(DCN_VM_FB_OFFSET, FB_OFFSET, &tmp);
*fb_offset = (uint64_t)tmp << 24;
}
static inline void dmub_dcn20_translate_addr(const union dmub_addr *addr_in,
uint64_t fb_base,
uint64_t fb_offset,
@@ -82,7 +95,9 @@ void dmub_dcn20_backdoor_load(struct dmub_srv *dmub,
const struct dmub_window *cw1)
{
union dmub_addr offset;
uint64_t fb_base = dmub->fb_base, fb_offset = dmub->fb_offset;
uint64_t fb_base, fb_offset;
dmub_dcn20_get_fb_base_offset(dmub, &fb_base, &fb_offset);
REG_UPDATE(DMCUB_SEC_CNTL, DMCUB_SEC_RESET, 1);
REG_UPDATE_2(DMCUB_MEM_CNTL, DMCUB_MEM_READ_SPACE, 0x3,
@@ -118,7 +133,9 @@ void dmub_dcn20_setup_windows(struct dmub_srv *dmub,
const struct dmub_window *cw6)
{
union dmub_addr offset;
uint64_t fb_base = dmub->fb_base, fb_offset = dmub->fb_offset;
uint64_t fb_base, fb_offset;
dmub_dcn20_get_fb_base_offset(dmub, &fb_base, &fb_offset);
dmub_dcn20_translate_addr(&cw2->offset, fb_base, fb_offset, &offset);