From a8b517e5312124e2dd7b6d6d9afac458aaecfbf3 Mon Sep 17 00:00:00 2001 From: Jean-Francois Moine Date: Sat, 25 Jan 2014 18:14:39 +0100 Subject: [PATCH] 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 Acked-by: Russell King Signed-off-by: Jean-Francois Moine Signed-off-by: Russell King --- drivers/gpu/drm/i2c/tda998x_drv.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c index 4352294d75cd..666ee24329b9 100644 --- a/drivers/gpu/drm/i2c/tda998x_drv.c +++ b/drivers/gpu/drm/i2c/tda998x_drv.c @@ -669,10 +669,8 @@ tda998x_configure_audio(struct tda998x_priv *priv, } 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 @@ tda998x_encoder_mode_set(struct drm_encoder *encoder, 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 @@ tda998x_encoder_mode_set(struct drm_encoder *encoder, /* set BIAS tmds value: */ reg_write(priv, REG_ANA_GENERAL, 0x09); - reg_write(priv, REG_TBG_CNTRL_0, 0); - /* * Sync on rising HSYNC/VSYNC */ -- 2.11.0