On 09/12/2012 07:52 AM, Jingoo Han wrote: > The value of AUX channel differential amplitude current is changed > from 8 mA to 16 mA, in order to increase AUX channel voltage level. > In this case, AUX channel voltage level can be changed from 400 mV > to 800 mV, when resistance between AUX TX and RX is 100 ohm. > > According to DP spec, although the normative voltage level is 390 mV, > the informative voltage level is 430 mV. So, 800 mV can be helpful > to improve voltage margin of AUX channel. > > Signed-off-by: Jingoo Han <jg1.han@xxxxxxxxxxx> Applied. But it might be a good idea to keep the old definition in the header file for documentation purposes. Thanks, Florian Tobias Schandinat > --- > drivers/video/exynos/exynos_dp_reg.c | 2 +- > drivers/video/exynos/exynos_dp_reg.h | 2 +- > 2 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/video/exynos/exynos_dp_reg.c b/drivers/video/exynos/exynos_dp_reg.c > index 20e441f..5fd1214 100644 > --- a/drivers/video/exynos/exynos_dp_reg.c > +++ b/drivers/video/exynos/exynos_dp_reg.c > @@ -77,7 +77,7 @@ void exynos_dp_init_analog_param(struct exynos_dp_device *dp) > writel(reg, dp->reg_base + EXYNOS_DP_ANALOG_CTL_3); > > reg = PD_RING_OSC | AUX_TERMINAL_CTRL_50_OHM | > - TX_CUR1_2X | TX_CUR_8_MA; > + TX_CUR1_2X | TX_CUR_16_MA; > writel(reg, dp->reg_base + EXYNOS_DP_PLL_FILTER_CTL_1); > > reg = CH3_AMP_400_MV | CH2_AMP_400_MV | > diff --git a/drivers/video/exynos/exynos_dp_reg.h b/drivers/video/exynos/exynos_dp_reg.h > index 125b27c..0e79031 100644 > --- a/drivers/video/exynos/exynos_dp_reg.h > +++ b/drivers/video/exynos/exynos_dp_reg.h > @@ -187,7 +187,7 @@ > #define PD_RING_OSC (0x1 << 6) > #define AUX_TERMINAL_CTRL_50_OHM (0x2 << 4) > #define TX_CUR1_2X (0x1 << 2) > -#define TX_CUR_8_MA (0x2 << 0) > +#define TX_CUR_16_MA (0x3 << 0) > > /* EXYNOS_DP_TX_AMP_TUNING_CTL */ > #define CH3_AMP_400_MV (0x0 << 24) -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
