[PATCH] drm/imx: imx-ldb: Disable both channels for split mode in enc->disable()

[Liu Ying]

Gentle ping...

On Tue, 2020-05-12 at 15:31 +0800, Liu Ying wrote:
> Both of the two LVDS channels should be disabled for split mode
> in the encoder's ->disable() callback, because they are enabled
> in the encoder's ->enable() callback.
> 
> Fixes: 6556f7f82b9c ("drm: imx: Move imx-drm driver out of staging")
> Cc: Philipp Zabel <p.zabel at pengutronix.de>
> Cc: Sascha Hauer <s.hauer at pengutronix.de>
> Cc: Pengutronix Kernel Team <kernel at pengutronix.de>
> Cc: NXP Linux Team <linux-imx at nxp.com>
> Cc: <stable at vger.kernel.org>
> Signed-off-by: Liu Ying <victor.liu at nxp.com>
> ---
>  drivers/gpu/drm/imx/imx-ldb.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/imx/imx-ldb.c b/drivers/gpu/drm/imx/imx-
> ldb.c
> index 4da22a9..af4d0d8 100644
> --- a/drivers/gpu/drm/imx/imx-ldb.c
> +++ b/drivers/gpu/drm/imx/imx-ldb.c
> @@ -303,18 +303,19 @@ static void imx_ldb_encoder_disable(struct
> drm_encoder *encoder)
>  {
>  	struct imx_ldb_channel *imx_ldb_ch =
> enc_to_imx_ldb_ch(encoder);
>  	struct imx_ldb *ldb = imx_ldb_ch->ldb;
> +	int dual = ldb->ldb_ctrl & LDB_SPLIT_MODE_EN;
>  	int mux, ret;
>  
>  	drm_panel_disable(imx_ldb_ch->panel);
>  
> -	if (imx_ldb_ch == &ldb->channel[0])
> +	if (imx_ldb_ch == &ldb->channel[0] || dual)
>  		ldb->ldb_ctrl &= ~LDB_CH0_MODE_EN_MASK;
> -	else if (imx_ldb_ch == &ldb->channel[1])
> +	if (imx_ldb_ch == &ldb->channel[1] || dual)
>  		ldb->ldb_ctrl &= ~LDB_CH1_MODE_EN_MASK;
>  
>  	regmap_write(ldb->regmap, IOMUXC_GPR2, ldb->ldb_ctrl);
>  
> -	if (ldb->ldb_ctrl & LDB_SPLIT_MODE_EN) {
> +	if (dual) {
>  		clk_disable_unprepare(ldb->clk[0]);
>  		clk_disable_unprepare(ldb->clk[1]);
>  	}