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Date: Thu, 20 Aug 2020 11:21:33 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Philipp Zabel <p.zabel@...gutronix.de>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>, NXP Linux Team <linux-imx@....com>, Liu Ying <victor.liu@....com> Subject: [PATCH 4.19 48/92] drm/imx: imx-ldb: Disable both channels for split mode in enc->disable() From: Liu Ying <victor.liu@....com> 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@...gutronix.de> Cc: Sascha Hauer <s.hauer@...gutronix.de> Cc: Pengutronix Kernel Team <kernel@...gutronix.de> Cc: NXP Linux Team <linux-imx@....com> Cc: <stable@...r.kernel.org> Signed-off-by: Liu Ying <victor.liu@....com> Signed-off-by: Philipp Zabel <p.zabel@...gutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- 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 @@ -311,18 +311,19 @@ 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]); }
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