The BIOS uses this register to write the results of the DAC_LoadDetection command, so we'll need to read this in order to make DAC load detection work.
As a reference, I used the mmBIOS_SCRATCH_0 definition from the amdgpu legacy display code. Signed-off-by: Timur Kristóf <[email protected]> --- drivers/gpu/drm/amd/display/dc/dc_bios_types.h | 1 + .../gpu/drm/amd/display/dc/resource/dce100/dce100_resource.c | 2 ++ .../gpu/drm/amd/display/dc/resource/dce110/dce110_resource.c | 2 ++ .../gpu/drm/amd/display/dc/resource/dce112/dce112_resource.c | 2 ++ .../gpu/drm/amd/display/dc/resource/dce120/dce120_resource.c | 1 + drivers/gpu/drm/amd/display/dc/resource/dce60/dce60_resource.c | 2 ++ drivers/gpu/drm/amd/display/dc/resource/dce80/dce80_resource.c | 2 ++ 7 files changed, 12 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/dc_bios_types.h b/drivers/gpu/drm/amd/display/dc/dc_bios_types.h index 545ce1e15eae..50c8906b74c5 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_bios_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_bios_types.h @@ -168,6 +168,7 @@ struct dc_vbios_funcs { }; struct bios_registers { + uint32_t BIOS_SCRATCH_0; uint32_t BIOS_SCRATCH_3; uint32_t BIOS_SCRATCH_6; }; diff --git a/drivers/gpu/drm/amd/display/dc/resource/dce100/dce100_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dce100/dce100_resource.c index 075815e4041a..891416e0423f 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dce100/dce100_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dce100/dce100_resource.c @@ -78,6 +78,7 @@ #endif #ifndef mmBIOS_SCRATCH_2 + #define mmBIOS_SCRATCH_0 0x05C9 #define mmBIOS_SCRATCH_2 0x05CB #define mmBIOS_SCRATCH_3 0x05CC #define mmBIOS_SCRATCH_6 0x05CF @@ -369,6 +370,7 @@ 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_0 = mmBIOS_SCRATCH_0, .BIOS_SCRATCH_3 = mmBIOS_SCRATCH_3, .BIOS_SCRATCH_6 = mmBIOS_SCRATCH_6 }; diff --git a/drivers/gpu/drm/amd/display/dc/resource/dce110/dce110_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dce110/dce110_resource.c index cccde5a6f3cd..42b0068b1c05 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dce110/dce110_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dce110/dce110_resource.c @@ -82,6 +82,7 @@ #endif #ifndef mmBIOS_SCRATCH_2 + #define mmBIOS_SCRATCH_0 0x05C9 #define mmBIOS_SCRATCH_2 0x05CB #define mmBIOS_SCRATCH_3 0x05CC #define mmBIOS_SCRATCH_6 0x05CF @@ -377,6 +378,7 @@ static const struct dce110_clk_src_mask cs_mask = { }; static const struct bios_registers bios_regs = { + .BIOS_SCRATCH_0 = mmBIOS_SCRATCH_0, .BIOS_SCRATCH_3 = mmBIOS_SCRATCH_3, .BIOS_SCRATCH_6 = mmBIOS_SCRATCH_6 }; diff --git a/drivers/gpu/drm/amd/display/dc/resource/dce112/dce112_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dce112/dce112_resource.c index 869a8e515fc0..328d784ac4c8 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dce112/dce112_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dce112/dce112_resource.c @@ -76,6 +76,7 @@ #endif #ifndef mmBIOS_SCRATCH_2 + #define mmBIOS_SCRATCH_0 0x05C9 #define mmBIOS_SCRATCH_2 0x05CB #define mmBIOS_SCRATCH_3 0x05CC #define mmBIOS_SCRATCH_6 0x05CF @@ -385,6 +386,7 @@ static const struct dce110_clk_src_mask cs_mask = { }; static const struct bios_registers bios_regs = { + .BIOS_SCRATCH_0 = mmBIOS_SCRATCH_0, .BIOS_SCRATCH_3 = mmBIOS_SCRATCH_3, .BIOS_SCRATCH_6 = mmBIOS_SCRATCH_6 }; diff --git a/drivers/gpu/drm/amd/display/dc/resource/dce120/dce120_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dce120/dce120_resource.c index 540e04ec1e2d..efc92381c98d 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dce120/dce120_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dce120/dce120_resource.c @@ -491,6 +491,7 @@ static struct dce_i2c_hw *dce120_i2c_hw_create( return dce_i2c_hw; } static const struct bios_registers bios_regs = { + .BIOS_SCRATCH_0 = mmBIOS_SCRATCH_0 + NBIO_BASE(mmBIOS_SCRATCH_0_BASE_IDX), .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) }; diff --git a/drivers/gpu/drm/amd/display/dc/resource/dce60/dce60_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dce60/dce60_resource.c index 5fa84c622282..1077c59cad39 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dce60/dce60_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dce60/dce60_resource.c @@ -80,6 +80,7 @@ #ifndef mmBIOS_SCRATCH_2 + #define mmBIOS_SCRATCH_0 0x05C9 #define mmBIOS_SCRATCH_2 0x05CB #define mmBIOS_SCRATCH_3 0x05CC #define mmBIOS_SCRATCH_6 0x05CF @@ -368,6 +369,7 @@ static const struct dce110_clk_src_mask cs_mask = { }; static const struct bios_registers bios_regs = { + .BIOS_SCRATCH_0 = mmBIOS_SCRATCH_0, .BIOS_SCRATCH_3 = mmBIOS_SCRATCH_3, .BIOS_SCRATCH_6 = mmBIOS_SCRATCH_6 }; diff --git a/drivers/gpu/drm/amd/display/dc/resource/dce80/dce80_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dce80/dce80_resource.c index 902209a17fe4..e10e70360d0a 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dce80/dce80_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dce80/dce80_resource.c @@ -78,6 +78,7 @@ #ifndef mmBIOS_SCRATCH_2 + #define mmBIOS_SCRATCH_0 0x05C9 #define mmBIOS_SCRATCH_2 0x05CB #define mmBIOS_SCRATCH_3 0x05CC #define mmBIOS_SCRATCH_6 0x05CF @@ -369,6 +370,7 @@ static const struct dce110_clk_src_mask cs_mask = { }; static const struct bios_registers bios_regs = { + .BIOS_SCRATCH_0 = mmBIOS_SCRATCH_0, .BIOS_SCRATCH_3 = mmBIOS_SCRATCH_3, .BIOS_SCRATCH_6 = mmBIOS_SCRATCH_6 }; -- 2.51.0
