linux-kernel - [PATCH] drm/mediatek: dsi: Fix EOTp generation

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Message-Id: <20230915075756.263591-1-mwalle@kernel.org>
Date:   Fri, 15 Sep 2023 09:57:56 +0200
From:   Michael Walle <mwalle@...nel.org>
To:     Chun-Kuang Hu <chunkuang.hu@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Jitao Shi <jitao.shi@...iatek.com>,
        dri-devel@...ts.freedesktop.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Michael Walle <mwalle@...nel.org>
Subject: [PATCH] drm/mediatek: dsi: Fix EOTp generation

The commit c87d1c4b5b9a ("drm/mediatek: dsi: Use symbolized register
definition") inverted the logic of the control bit. Maybe it was because
of the bad naming which was fixed in commit 0f3b68b66a6d ("drm/dsi: Add
_NO_ to MIPI_DSI_* flags disabling features"). In any case, the logic
wrong and there will be no EOTp on the DSI link by default. Fix it.

Fixes: c87d1c4b5b9a ("drm/mediatek: dsi: Use symbolized register definition")
Signed-off-by: Michael Walle <mwalle@...nel.org>
---
 drivers/gpu/drm/mediatek/mtk_dsi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c
index d67e5c61a9b9..8024b20f6b13 100644
--- a/drivers/gpu/drm/mediatek/mtk_dsi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dsi.c
@@ -407,7 +407,7 @@ static void mtk_dsi_rxtx_control(struct mtk_dsi *dsi)
 	if (dsi->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS)
 		tmp_reg |= HSTX_CKLP_EN;
 
-	if (!(dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET))
+	if (dsi->mode_flags & MIPI_DSI_MODE_NO_EOT_PACKET)
 		tmp_reg |= DIS_EOT;
 
 	writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL);
-- 
2.39.2