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drm/amd/display: Fix takover from VGA mode

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HW Engineer's Notes:
 During switch from vga->extended, if we set the VGA_TEST_ENABLE and then
 hit the VGA_TEST_RENDER_START, then the DCHUBP timing gets updated correctly.
 Then vBIOS will have it poll for the VGA_TEST_RENDER_DONE and unset
 VGA_TEST_ENABLE, to leave it in the same state as before.

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Bhawanpreet Lakha 2018-02-27 12:12:46 -05:00 committed by Alex Deucher
parent 9fe8f03bc0
commit bd9bc355be
2 changed files with 18 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.h
View file

@ -236,6 +236,7 @@
SR(D2VGA_CONTROL), \
SR(D3VGA_CONTROL), \
SR(D4VGA_CONTROL), \
SR(VGA_TEST_CONTROL), \
SR(DC_IP_REQUEST_CNTL), \
BL_REG_LIST()
@ -337,6 +338,7 @@ struct dce_hwseq_registers {
uint32_t D2VGA_CONTROL;
uint32_t D3VGA_CONTROL;
uint32_t D4VGA_CONTROL;
uint32_t VGA_TEST_CONTROL;
/* MMHUB registers. read only. temporary hack */
uint32_t VM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32;
uint32_t VM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32;
@ -494,7 +496,9 @@ struct dce_hwseq_registers {
HWS_SF(, DOMAIN7_PG_STATUS, DOMAIN7_PGFSM_PWR_STATUS, mask_sh), \
HWS_SF(, DC_IP_REQUEST_CNTL, IP_REQUEST_EN, mask_sh), \
HWS_SF(, LVTMA_PWRSEQ_CNTL, LVTMA_BLON, mask_sh), \
HWS_SF(, LVTMA_PWRSEQ_STATE, LVTMA_PWRSEQ_TARGET_STATE_R, mask_sh)
HWS_SF(, LVTMA_PWRSEQ_STATE, LVTMA_PWRSEQ_TARGET_STATE_R, mask_sh), \
HWS_SF(, VGA_TEST_CONTROL, VGA_TEST_ENABLE, mask_sh),\
HWS_SF(, VGA_TEST_CONTROL, VGA_TEST_RENDER_START, mask_sh)
#define HWSEQ_REG_FIELD_LIST(type) \
type DCFE_CLOCK_ENABLE; \
@ -583,7 +587,9 @@ struct dce_hwseq_registers {
type DCFCLK_GATE_DIS; \
type DCHUBBUB_GLOBAL_TIMER_REFDIV; \
type DENTIST_DPPCLK_WDIVIDER; \
type DENTIST_DISPCLK_WDIVIDER;
type DENTIST_DISPCLK_WDIVIDER; \
type VGA_TEST_ENABLE; \
type VGA_TEST_RENDER_START;
struct dce_hwseq_shift {
HWSEQ_REG_FIELD_LIST(uint8_t)

10
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
View file

@ -242,6 +242,16 @@ static void disable_vga(
REG_WRITE(D2VGA_CONTROL, 0);
REG_WRITE(D3VGA_CONTROL, 0);
REG_WRITE(D4VGA_CONTROL, 0);
/* HW Engineer's Notes:
* During switch from vga->extended, if we set the VGA_TEST_ENABLE and
* then hit the VGA_TEST_RENDER_START, then the DCHUBP timing gets updated correctly.
*
* Then vBIOS will have it poll for the VGA_TEST_RENDER_DONE and unset
* VGA_TEST_ENABLE, to leave it in the same state as before.
*/
REG_UPDATE(VGA_TEST_CONTROL, VGA_TEST_ENABLE, 1);
REG_UPDATE(VGA_TEST_CONTROL, VGA_TEST_RENDER_START, 1);
}
static void dpp_pg_control(