This is a note to let you know that I've just added the patch titled drm/imx: imx-ldb: Disable both channels for split mode in enc->disable() to the 5.8-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-imx-imx-ldb-disable-both-channels-for-split-mode-in-enc-disable.patch and it can be found in the queue-5.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 3b2a999582c467d1883716b37ffcc00178a13713 Mon Sep 17 00:00:00 2001 From: Liu Ying <victor.liu@xxxxxxx> Date: Thu, 9 Jul 2020 10:28:52 +0800 Subject: drm/imx: imx-ldb: Disable both channels for split mode in enc->disable() From: Liu Ying <victor.liu@xxxxxxx> commit 3b2a999582c467d1883716b37ffcc00178a13713 upstream. 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@xxxxxxxxxxxxxx> Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx> Cc: Pengutronix Kernel Team <kernel@xxxxxxxxxxxxxx> Cc: NXP Linux Team <linux-imx@xxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Signed-off-by: Liu Ying <victor.liu@xxxxxxx> Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/imx/imx-ldb.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) --- a/drivers/gpu/drm/imx/imx-ldb.c +++ b/drivers/gpu/drm/imx/imx-ldb.c @@ -304,18 +304,19 @@ static void imx_ldb_encoder_disable(stru { 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]); } Patches currently in stable-queue which might be from victor.liu@xxxxxxx are queue-5.8/drm-imx-imx-ldb-disable-both-channels-for-split-mode-in-enc-disable.patch