drm/i2c: tda998x: code optimization
This patch reduces the number of I2C exchanges by setting many bits in
one write and removing a useless write.
Tested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 4352294..666ee24 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -669,10 +669,8 @@
}
reg_write(priv, REG_AIP_CLKSEL, clksel_aip);
- reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_LAYOUT);
-
- /* Enable automatic CTS generation */
- reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_ACR_MAN);
+ reg_clear(priv, REG_AIP_CNTRL_0, AIP_CNTRL_0_LAYOUT |
+ AIP_CNTRL_0_ACR_MAN); /* auto CTS */
reg_write(priv, REG_CTS_N, cts_n);
/*
@@ -908,10 +906,10 @@
reg_write(priv, REG_VIP_CNTRL_5, VIP_CNTRL_5_SP_CNT(0));
reg_write(priv, REG_VIP_CNTRL_4, VIP_CNTRL_4_BLANKIT(0) |
VIP_CNTRL_4_BLC(0));
- reg_clear(priv, REG_PLL_SERIAL_3, PLL_SERIAL_3_SRL_CCIR);
reg_clear(priv, REG_PLL_SERIAL_1, PLL_SERIAL_1_SRL_MAN_IZ);
- reg_clear(priv, REG_PLL_SERIAL_3, PLL_SERIAL_3_SRL_DE);
+ reg_clear(priv, REG_PLL_SERIAL_3, PLL_SERIAL_3_SRL_CCIR |
+ PLL_SERIAL_3_SRL_DE);
reg_write(priv, REG_SERIALIZER, 0);
reg_write(priv, REG_HVF_CNTRL_1, HVF_CNTRL_1_VQR(0));
@@ -931,8 +929,6 @@
/* set BIAS tmds value: */
reg_write(priv, REG_ANA_GENERAL, 0x09);
- reg_write(priv, REG_TBG_CNTRL_0, 0);
-
/*
* Sync on rising HSYNC/VSYNC
*/