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| author | Zeyu Fan <Zeyu.Fan@amd.com> | 2017-07-19 16:46:42 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2017-09-26 18:15:21 -0400 |
| commit | 3d696cbfd48f20d482f2aab2c65ce3a540debd89 (patch) | |
| tree | e52f1d309ae4f9ab2d8a7c72ca633506f756ea59 /drivers/gpu/drm/amd/display/dc/i2caux | |
| parent | 6631e5a91139f317caa6c75b38553afda0fa8626 (diff) | |
| download | linux-stable-3d696cbfd48f20d482f2aab2c65ce3a540debd89.tar.gz linux-stable-3d696cbfd48f20d482f2aab2c65ce3a540debd89.tar.bz2 linux-stable-3d696cbfd48f20d482f2aab2c65ce3a540debd89.zip | |
drm/amd/display: Set i2c speed to 100khz for DCE11.2 and later.
Signed-off-by: Zeyu Fan <Zeyu.Fan@amd.com>
Reviewed-by: Charlene Liu <Charlene.Liu@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/i2caux')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c b/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c index 983645b1be78..45e766ea79e3 100644 --- a/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c +++ b/drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c @@ -337,6 +337,9 @@ enum { DEFAULT_I2C_SW_SPEED = 50, DEFAULT_I2C_HW_SPEED = 50, + DEFAULT_I2C_SW_SPEED_100KHZ = 100, + DEFAULT_I2C_HW_SPEED_100KHZ = 100, + /* This is the timeout as defined in DP 1.2a, * 2.3.4 "Detailed uPacket TX AUX CH State Description". */ AUX_TIMEOUT_PERIOD = 400, @@ -436,8 +439,13 @@ bool dal_i2caux_construct( i2caux->aux_timeout_period = SW_AUX_TIMEOUT_PERIOD_MULTIPLIER * AUX_TIMEOUT_PERIOD; - i2caux->default_i2c_sw_speed = DEFAULT_I2C_SW_SPEED; - i2caux->default_i2c_hw_speed = DEFAULT_I2C_HW_SPEED; + if (ctx->dce_version >= DCE_VERSION_11_2) { + i2caux->default_i2c_hw_speed = DEFAULT_I2C_HW_SPEED_100KHZ; + i2caux->default_i2c_sw_speed = DEFAULT_I2C_SW_SPEED_100KHZ; + } else { + i2caux->default_i2c_hw_speed = DEFAULT_I2C_HW_SPEED; + i2caux->default_i2c_sw_speed = DEFAULT_I2C_SW_SPEED; + } return true; } |