Commit 3d696cbf authored by Zeyu Fan's avatar Zeyu Fan Committed by Alex Deucher
Browse files

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



Signed-off-by: default avatarZeyu Fan <Zeyu.Fan@amd.com>
Reviewed-by: default avatarCharlene Liu <Charlene.Liu@amd.com>
Acked-by: default avatarHarry Wentland <Harry.Wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 6631e5a9

drivers/gpu/drm/amd/display/dc/i2caux/i2caux.c

+10 −2
Original line number Original line Diff line number Diff line
@@ -337,6 +337,9 @@ enum { 
	DEFAULT_I2C_SW_SPEED = 50,

	DEFAULT_I2C_SW_SPEED = 50,

	DEFAULT_I2C_HW_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,

	/* This is the timeout as defined in DP 1.2a,

	 * 2.3.4 "Detailed uPacket TX AUX CH State Description". */

	 * 2.3.4 "Detailed uPacket TX AUX CH State Description". */

	AUX_TIMEOUT_PERIOD = 400,

	AUX_TIMEOUT_PERIOD = 400,
@@ -436,8 +439,13 @@ bool dal_i2caux_construct( 
	i2caux->aux_timeout_period =

	i2caux->aux_timeout_period =

		SW_AUX_TIMEOUT_PERIOD_MULTIPLIER * AUX_TIMEOUT_PERIOD;

		SW_AUX_TIMEOUT_PERIOD_MULTIPLIER * AUX_TIMEOUT_PERIOD;





	i2caux->default_i2c_sw_speed = DEFAULT_I2C_SW_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_hw_speed = DEFAULT_I2C_HW_SPEED;

		i2caux->default_i2c_sw_speed = DEFAULT_I2C_SW_SPEED;

	}





	return true;

	return true;

}

}