drm/amd/display: fix eDP fast bootup for pre-raven asic

[Why]
For fastboot, Bios will light up eDP before SW driver is loaded. SW
driver will check if eDP is lit by bios through reading the
BIOS_SCRATCH_3 register. If lit, SW driver will not power down eDP
power and phy to save time.

Definition of BIOS_SCRATCH_3 are missing for pre-raven asic. This
causes eDP fast boot to not work property. For some eDP panels, even
if dp tx sends NoVideoStream_flag =1 and dpcd 0x600=2, eDP rx may not
handle properly. This may cause a short flash on screen.

[How] Add definition of BIOS_SCRATCH_3 for all asic
Signed-off-by: hersen wu <hersenxs.wu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Acked-by: Yongqiang Sun <yongqiang.sun@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/bios/bios_parser_helper.c

@@ -83,7 +83,6 @@ uint32_t bios_get_vga_enabled_displays(
 {
 	uint32_t active_disp = 1;
 
-	if (bios->regs->BIOS_SCRATCH_3) /*follow up with other asic, todo*/
 	active_disp = REG_READ(BIOS_SCRATCH_3) & 0XFFFF;
 	return active_disp;
 }

drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c

@@ -76,6 +76,7 @@
 
 #ifndef mmBIOS_SCRATCH_2
 	#define mmBIOS_SCRATCH_2 0x05CB
+	#define mmBIOS_SCRATCH_3 0x05CC
 	#define mmBIOS_SCRATCH_6 0x05CF
 #endif
 
@@ -365,6 +366,7 @@ static const struct dce_abm_mask abm_mask = {
 #define DCFE_MEM_PWR_CTRL_REG_BASE 0x1b03
 
 static const struct bios_registers bios_regs = {
+	.BIOS_SCRATCH_3 = mmBIOS_SCRATCH_3,
 	.BIOS_SCRATCH_6 = mmBIOS_SCRATCH_6
 };
 

drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c

@@ -84,6 +84,7 @@
 
 #ifndef mmBIOS_SCRATCH_2
 	#define mmBIOS_SCRATCH_2 0x05CB
+	#define mmBIOS_SCRATCH_3 0x05CC
 	#define mmBIOS_SCRATCH_6 0x05CF
 #endif
 
@@ -369,6 +370,7 @@ static const struct dce110_clk_src_mask cs_mask = {
 };
 
 static const struct bios_registers bios_regs = {
+	.BIOS_SCRATCH_3 = mmBIOS_SCRATCH_3,
 	.BIOS_SCRATCH_6 = mmBIOS_SCRATCH_6
 };
 

drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c

@@ -76,6 +76,7 @@
 
 #ifndef mmBIOS_SCRATCH_2
 	#define mmBIOS_SCRATCH_2 0x05CB
+	#define mmBIOS_SCRATCH_3 0x05CC
 	#define mmBIOS_SCRATCH_6 0x05CF
 #endif
 
@@ -376,6 +377,7 @@ static const struct dce110_clk_src_mask cs_mask = {
 };
 
 static const struct bios_registers bios_regs = {
+	.BIOS_SCRATCH_3 = mmBIOS_SCRATCH_3,
 	.BIOS_SCRATCH_6 = mmBIOS_SCRATCH_6
 };
 

drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c

@@ -442,6 +442,7 @@ struct dce_i2c_hw *dce120_i2c_hw_create(
 	return dce_i2c_hw;
 }
 static const struct bios_registers bios_regs = {
+	.BIOS_SCRATCH_3 = mmBIOS_SCRATCH_3 + NBIO_BASE(mmBIOS_SCRATCH_3_BASE_IDX),
 	.BIOS_SCRATCH_6 = mmBIOS_SCRATCH_6 + NBIO_BASE(mmBIOS_SCRATCH_6_BASE_IDX)
 };
 

drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c

@@ -77,6 +77,7 @@
 
 #ifndef mmBIOS_SCRATCH_2
 	#define mmBIOS_SCRATCH_2 0x05CB
+	#define mmBIOS_SCRATCH_3 0x05CC
 	#define mmBIOS_SCRATCH_6 0x05CF
 #endif
 
@@ -358,6 +359,7 @@ static const struct dce110_clk_src_mask cs_mask = {
 };
 
 static const struct bios_registers bios_regs = {
+	.BIOS_SCRATCH_3 = mmBIOS_SCRATCH_3,
 	.BIOS_SCRATCH_6 = mmBIOS_SCRATCH_6
 };