diff options
| author | Luben Tuikov <luben.tuikov@amd.com> | 2021-03-10 14:02:04 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-07-01 00:24:41 -0400 |
| commit | 36b1a00d2bb496bc9ac010b42ba39413a27de7c8 (patch) | |
| tree | 6c87aee34acb8e242a2a8b462a6882cce0b3fdf6 /drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c | |
| parent | ebe57d0c8ecc7279c81d75746385595bc9eb5fca (diff) | |
| download | linux-stable-36b1a00d2bb496bc9ac010b42ba39413a27de7c8.tar.gz linux-stable-36b1a00d2bb496bc9ac010b42ba39413a27de7c8.tar.bz2 linux-stable-36b1a00d2bb496bc9ac010b42ba39413a27de7c8.zip | |
drm/amdgpu: Fix width of I2C address
The I2C address is kept as a 16-bit quantity in
the kernel. The I2C_TAR::I2C_TAR field is 10-bit
wide.
Fix the width of the I2C address for Vega20 from 8
bits to 16 bits to accommodate the full spectrum
of I2C address space.
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>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c | 19 |
1 files changed, 11 insertions, 8 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c b/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c index e403ba556e55..650352567566 100644 --- a/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c +++ b/drivers/gpu/drm/amd/amdgpu/smu_v11_0_i2c.c @@ -111,12 +111,15 @@ static void smu_v11_0_i2c_set_clock(struct i2c_adapter *control) WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_SDA_HOLD, 20); } -static void smu_v11_0_i2c_set_address(struct i2c_adapter *control, uint8_t address) +static void smu_v11_0_i2c_set_address(struct i2c_adapter *control, u16 address) { struct amdgpu_device *adev = to_amdgpu_device(control); - /* We take 7-bit addresses raw */ - WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_TAR, (address & 0xFF)); + /* The IC_TAR::IC_TAR field is 10-bits wide. + * It takes a 7-bit or 10-bit addresses as an address, + * i.e. no read/write bit--no wire format, just the address. + */ + WREG32_SOC15(SMUIO, 0, mmCKSVII2C_IC_TAR, address & 0x3FF); } static uint32_t smu_v11_0_i2c_poll_tx_status(struct i2c_adapter *control) @@ -215,8 +218,8 @@ static uint32_t smu_v11_0_i2c_poll_rx_status(struct i2c_adapter *control) * Returns 0 on success or error. */ static uint32_t smu_v11_0_i2c_transmit(struct i2c_adapter *control, - uint8_t address, uint8_t *data, - uint32_t numbytes, uint32_t i2c_flag) + u16 address, u8 *data, + u32 numbytes, u32 i2c_flag) { struct amdgpu_device *adev = to_amdgpu_device(control); uint32_t bytes_sent, reg, ret = 0; @@ -225,7 +228,7 @@ static uint32_t smu_v11_0_i2c_transmit(struct i2c_adapter *control, bytes_sent = 0; DRM_DEBUG_DRIVER("I2C_Transmit(), address = %x, bytes = %d , data: ", - (uint16_t)address, numbytes); + address, numbytes); if (drm_debug_enabled(DRM_UT_DRIVER)) { print_hex_dump(KERN_INFO, "data: ", DUMP_PREFIX_NONE, @@ -318,8 +321,8 @@ Err: * Returns 0 on success or error. */ static uint32_t smu_v11_0_i2c_receive(struct i2c_adapter *control, - uint8_t address, uint8_t *data, - uint32_t numbytes, uint8_t i2c_flag) + u16 address, u8 *data, + u32 numbytes, u32 i2c_flag) { struct amdgpu_device *adev = to_amdgpu_device(control); uint32_t bytes_received, ret = I2C_OK; |