drm/tegra: dpaux: Keep reset defaults for hybrid pad parameters

Keep the reset values for the common mode voltage, output driver
impedance control and output driver current control parameters. This
fixes errors seen during SCDC communication with HDMI sinks.

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/gpu/drm/tegra/dpaux.c b/drivers/gpu/drm/tegra/dpaux.c
index 312b93c0323cb50adc0477f858c77936bd1b8d85..d84e81ff36ad0d906b1002650093748d728ec95b 100644 (file)
--- a/drivers/gpu/drm/tegra/dpaux.c
+++ b/drivers/gpu/drm/tegra/dpaux.c
@@ -322,6 +322,9 @@ static int tegra_dpaux_pad_config(struct tegra_dpaux *dpaux, unsigned function)
        case DPAUX_PADCTL_FUNC_I2C:
                value = DPAUX_HYBRID_PADCTL_I2C_SDA_INPUT_RCV |
                        DPAUX_HYBRID_PADCTL_I2C_SCL_INPUT_RCV |
+                       DPAUX_HYBRID_PADCTL_AUX_CMH(2) |
+                       DPAUX_HYBRID_PADCTL_AUX_DRVZ(4) |
+                       DPAUX_HYBRID_PADCTL_AUX_DRVI(0x18) |
                        DPAUX_HYBRID_PADCTL_MODE_I2C;
                break;