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drm/amd/display: Set i2c speed to 100khz for DCE11.2 and later.

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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>
This commit is contained in:
Zeyu Fan 2017-07-19 16:46:42 -04:00 committed by Alex Deucher
parent 6631e5a911
commit 3d696cbfd4
1 changed files with 10 additions and 2 deletions
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12
drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c
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@ -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;
}