drm/amdgpu: Fix Vega20 I2C to be agnostic (v2)

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Teach Vega20 I2C to be agnostic. Allow addressing
different devices while the master holds the bus.
Set STOP as per the controller's specification.

v2: Qualify generating ReSTART before the 1st byte
    of the message, when set by the caller, as
    those functions are separated, as caught by
    Andrey G.

Cc: Jean Delvare <jdelvare@suse.de>
Cc: Alexander Deucher <Alexander.Deucher@amd.com>
Cc: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Cc: Lijo Lazar <Lijo.Lazar@amd.com>
Cc: Stanley Yang <Stanley.Yang@amd.com>
Cc: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Acked-by: Alexander Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Luben Tuikov 2021-01-26 15:56:45 -05:00 • committed by Alex Deucher

parent 35ed27032c

commit daaa75fd98

2 changed files with 69 additions and 40 deletions

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4

drivers/gpu/drm/amd/amdgpu/amdgpu_eeprom.c

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107

drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c

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