[PATCH v2] drm/amdgpu: fix power distribution issue for Polaris10 XT

[zhoucm1]

On 2016年07月12日 10:39, Ken Wang wrote:
> Change-Id: I8676174acd3273dd8dccc72ecc1d54e9626bdb71
> Signed-off-by: Ken Wang <Qingqing.Wang at amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/atombios_i2c.c | 15 +++++++++++++++
>   drivers/gpu/drm/amd/amdgpu/atombios_i2c.h |  1 +
>   drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c     |  5 +++++
>   3 files changed, 21 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> index 13cdb01..145d752 100644
> --- a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> +++ b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.c
> @@ -156,3 +156,18 @@ u32 amdgpu_atombios_i2c_func(struct i2c_adapter *adap)
>   	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
>   }
>   
> +void amdgpu_atombios_i2c_channel_trans(struct amdgpu_device* adev, u8 offset, u8 data)
> +{
> +	PROCESS_I2C_CHANNEL_TRANSACTION_PS_ALLOCATION args;
> +	int index = GetIndexIntoMasterTable(COMMAND, ProcessI2cChannelTransaction);
> +
> +	args.ucRegIndex = offset;
> +	args.lpI2CDataOut = data;
> +	args.ucFlag = 1;
> +	args.ucI2CSpeed = TARGET_HW_I2C_CLOCK;
> +	args.ucTransBytes = 1;
> +	args.ucSlaveAddr = 0x10;

Is this Polaris10 XT specific? if yes, seems the func name need to be 
specific as well.

Regards,
David Zhou

> +	args.ucLineNumber = 0x96;
> +
> +	amdgpu_atom_execute_table(adev->mode_info.atom_context, index, (uint32_t *)&args);
> +}
> diff --git a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.h b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.h
> index d6128d9d..d31344f 100644
> --- a/drivers/gpu/drm/amd/amdgpu/atombios_i2c.h
> +++ b/drivers/gpu/drm/amd/amdgpu/atombios_i2c.h
> @@ -27,5 +27,6 @@
>   int amdgpu_atombios_i2c_xfer(struct i2c_adapter *i2c_adap,
>   		      struct i2c_msg *msgs, int num);
>   u32 amdgpu_atombios_i2c_func(struct i2c_adapter *adap);
> +void amdgpu_atombios_i2c_channel_trans(struct amdgpu_device* adev, u8 offset, u8 data);
>   
>   #endif
> diff --git a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> index dbef1ed..362eab7 100644
> --- a/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/gfx_v8_0.c
> @@ -28,6 +28,7 @@
>   #include "vid.h"
>   #include "amdgpu_ucode.h"
>   #include "amdgpu_atombios.h"
> +#include "atombios_i2c.h"
>   #include "clearstate_vi.h"
>   
>   #include "gmc/gmc_8_2_d.h"
> @@ -693,6 +694,10 @@ static void gfx_v8_0_init_golden_registers(struct amdgpu_device *adev)
>   		amdgpu_program_register_sequence(adev,
>   						 polaris10_golden_common_all,
>   						 (const u32)ARRAY_SIZE(polaris10_golden_common_all));
> +		if (adev->pdev->revision == 0xc7) {
> +			amdgpu_atombios_i2c_channel_trans(adev, 0x1E, 0xDD);
> +			amdgpu_atombios_i2c_channel_trans(adev, 0x1F, 0xD0);
> +		}
>   		break;
>   	case CHIP_CARRIZO:
>   		amdgpu_program_register_sequence(adev,