From: Eric Yang <Eric.Yang2@amd.com>
Date: Tue, 27 Feb 2018 15:34:30 -0500
Subject: drm/amd/display: fix check condition for edp power control
Git-commit: d03f3f6304336b85737d77393d55cd4d89154c72
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Per discussion with VBIOS team, the orginal check is not correct in
all cases on latest VBIOS. Additional check is needed. This change should
maintain old behaviour on older VBIOS.

Signed-off-by: Eric Yang <Eric.Yang2@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.h              |    8 +++++++-
 drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c |   10 +++++++---
 2 files changed, 14 insertions(+), 4 deletions(-)

--- a/drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.h
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_hwseq.h
@@ -329,6 +329,8 @@ struct dce_hwseq_registers {
 	HWSEQ_DCE10_MASK_SH_LIST(mask_sh),\
 	SF(DCFEV_CLOCK_CONTROL, DCFEV_CLOCK_ENABLE, mask_sh),\
 	HWS_SF(, LVTMA_PWRSEQ_CNTL, LVTMA_BLON, mask_sh),\
+	HWS_SF(, LVTMA_PWRSEQ_CNTL, LVTMA_DIGON, mask_sh),\
+	HWS_SF(, LVTMA_PWRSEQ_CNTL, LVTMA_DIGON_OVRD, mask_sh),\
 	HWS_SF(, LVTMA_PWRSEQ_STATE, LVTMA_PWRSEQ_TARGET_STATE_R, mask_sh),\
 	HWSEQ_PIXEL_RATE_MASK_SH_LIST(mask_sh, CRTC0_)
 
@@ -412,6 +414,8 @@ struct dce_hwseq_registers {
 	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), \
+	HWS_SF(, LVTMA_PWRSEQ_CNTL, LVTMA_DIGON, mask_sh), \
+	HWS_SF(, LVTMA_PWRSEQ_CNTL, LVTMA_DIGON_OVRD, mask_sh), \
 	HWS_SF(, LVTMA_PWRSEQ_STATE, LVTMA_PWRSEQ_TARGET_STATE_R, mask_sh)
 
 #define HWSEQ_REG_FIELD_LIST(type) \
@@ -444,7 +448,9 @@ struct dce_hwseq_registers {
 	type ENABLE_L1_TLB;\
 	type SYSTEM_ACCESS_MODE;\
 	type LVTMA_BLON;\
-	type LVTMA_PWRSEQ_TARGET_STATE_R;
+	type LVTMA_PWRSEQ_TARGET_STATE_R;\
+	type LVTMA_DIGON;\
+	type LVTMA_DIGON_OVRD;
 
 #define HWSEQ_DCN_REG_FIELD_LIST(type) \
 	type HUBP_VTG_SEL; \
--- a/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c
@@ -737,10 +737,14 @@ static bool is_panel_backlight_on(struct
 
 static bool is_panel_powered_on(struct dce_hwseq *hws)
 {
-	uint32_t value;
+	uint32_t pwr_seq_state, dig_on, dig_on_ovrd;
 
-	REG_GET(LVTMA_PWRSEQ_STATE, LVTMA_PWRSEQ_TARGET_STATE_R, &value);
-	return value == 1;
+
+	REG_GET(LVTMA_PWRSEQ_STATE, LVTMA_PWRSEQ_TARGET_STATE_R, &pwr_seq_state);
+
+	REG_GET_2(LVTMA_PWRSEQ_CNTL, LVTMA_DIGON, &dig_on, LVTMA_DIGON_OVRD, &dig_on_ovrd);
+
+	return (pwr_seq_state == 1) || (dig_on == 1 && dig_on_ovrd == 1);
 }
 
 static enum bp_result link_transmitter_control(