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drm/amd/display: early return if not in vga mode in disable_vga

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The work around for hw bug causes S3 resume failure. Don't execute
disable vga logic if not in vga mode.

Signed-off-by: Eric Yang <Eric.Yang2@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:
Eric Yang 2018-02-28 14:45:36 -05:00 committed by Alex Deucher
parent d54ee94603
commit e18d308673
2 changed files with 10 additions and 4 deletions
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4
drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.h
View File

@ -407,6 +407,7 @@ struct dce_hwseq_registers {
HWS_SF(, DOMAIN6_PG_STATUS, DOMAIN6_PGFSM_PWR_STATUS, mask_sh), \
HWS_SF(, DOMAIN7_PG_STATUS, DOMAIN7_PGFSM_PWR_STATUS, mask_sh), \
HWS_SF(, DC_IP_REQUEST_CNTL, IP_REQUEST_EN, mask_sh), \
HWS_SF(, D1VGA_CONTROL, D1VGA_MODE_ENABLE, mask_sh),\
HWS_SF(, VGA_TEST_CONTROL, VGA_TEST_ENABLE, mask_sh),\
HWS_SF(, VGA_TEST_CONTROL, VGA_TEST_RENDER_START, mask_sh),\
HWS_SF(, LVTMA_PWRSEQ_CNTL, LVTMA_BLON, mask_sh), \
@ -495,7 +496,8 @@ struct dce_hwseq_registers {
type DENTIST_DPPCLK_WDIVIDER; \
type DENTIST_DISPCLK_WDIVIDER; \
type VGA_TEST_ENABLE; \
type VGA_TEST_RENDER_START;
type VGA_TEST_RENDER_START; \
type D1VGA_MODE_ENABLE;
struct dce_hwseq_shift {
HWSEQ_REG_FIELD_LIST(uint8_t)

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

@ -220,10 +220,14 @@ static void enable_power_gating_plane(
static void disable_vga(
struct dce_hwseq *hws)
{
unsigned int in_vga_mode = 0;
REG_GET(D1VGA_CONTROL, D1VGA_MODE_ENABLE, &in_vga_mode);
if (in_vga_mode == 0)
return;
REG_WRITE(D1VGA_CONTROL, 0);
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