[PATCH] drm/bridge: tc358775: Do not soft reset i2c-slave controller

[Robert Foss]

On Thu, 1 Sept 2022 at 15:20, Teresa Remmet <t.remmet at phytec.de> wrote:
>
> Soft reset during tc_bridge_enable() is triggered by setting all available
> reset control bits in the SYSRST register.
> But as noted in the data sheet resetting the i2c-slave controller should
> be only done over DSI and is only useful for chip debugging.
> So do not set RSTI2CS (bit0).
>
> Signed-off-by: Teresa Remmet <t.remmet at phytec.de>
> ---
>  drivers/gpu/drm/bridge/tc358775.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/bridge/tc358775.c b/drivers/gpu/drm/bridge/tc358775.c
> index f1c6e62b0e1d..a5f5eae1e80f 100644
> --- a/drivers/gpu/drm/bridge/tc358775.c
> +++ b/drivers/gpu/drm/bridge/tc358775.c
> @@ -408,7 +408,7 @@ static void tc_bridge_enable(struct drm_bridge *bridge)
>                  (val >> 8) & 0xFF, val & 0xFF);
>
>         d2l_write(tc->i2c, SYSRST, SYS_RST_REG | SYS_RST_DSIRX | SYS_RST_BM |
> -                 SYS_RST_LCD | SYS_RST_I2CM | SYS_RST_I2CS);
> +                 SYS_RST_LCD | SYS_RST_I2CM);
>         usleep_range(30000, 40000);
>
>         d2l_write(tc->i2c, PPI_TX_RX_TA, TTA_GET | TTA_SURE);
> --
> 2.25.1
>

Reviewed-by: Robert Foss <robert.foss at linaro.org>

Waiting a few days before applying this patch.