From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
To: xinlei.lee@mediatek.com, chunkuang.hu@kernel.org,
p.zabel@pengutronix.de, airlied@linux.ie, daniel@ffwll.ch,
matthias.bgg@gmail.com
Cc: dri-devel@lists.freedesktop.org,
linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Project_Global_Chrome_Upstream_Group@mediatek.com,
rex-bc.chen@mediatek.com, jitao.shi@mediatek.com
Subject: Re: [PATCH v5, 4/5] drm/mediatek: keep dsi as LP00 before dcs cmds transfer
Date: Wed, 11 May 2022 17:04:48 +0200 [thread overview]
Message-ID: <20f078a8-f050-127f-b720-b5fc8c893c9c@collabora.com> (raw)
In-Reply-To: <1652236596-21648-5-git-send-email-xinlei.lee@mediatek.com>
Il 11/05/22 04:36, xinlei.lee@mediatek.com ha scritto:
> From: Jitao Shi <jitao.shi@mediatek.com>
>
> To comply with the panel sequence, hold the mipi signal to LP00 before the dcs cmds transmission,
> and pull the mipi signal high from LP00 to LP11 until the start of the dcs cmds transmission.
> The normal panel timing is :
> (1) pp1800 DC pull up
> (2) avdd & avee AC pull high
> (3) lcm_reset pull high -> pull low -> pull high
> (4) Pull MIPI signal high (LP11) -> initial code -> send video data(HS mode)
> The power-off sequence is reversed.
> If dsi is not in cmd mode, then dsi will pull the mipi signal high in the mtk_output_dsi_enable function.
> The delay in lane_ready func is the reaction time of dsi_rx after pulling up the mipi signal.
>
> Fixes: 2dd8075d2185 ("drm/mediatek: mtk_dsi: Use the drm_panel_bridge API")
>
> Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
> Signed-off-by: Xinlei Lee <xinlei.lee@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
next prev parent reply other threads:[~2022-05-11 15:05 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-11 2:36 [PATCH v5,0/5] Cooperate with DSI RX devices to modify dsi funcs and delay mipi high to cooperate with panel sequence xinlei.lee
2022-05-11 2:36 ` [PATCH v5,1/5] drm/mediatek: Adjust the timing of mipi signal from LP00 to LP11 xinlei.lee
2022-05-11 2:36 ` [PATCH v5,2/5] drm/mediatek: Modify dsi funcs to atomic operations xinlei.lee
2022-05-11 2:36 ` [PATCH v5,3/5] drm/mediatek: Separate poweron/poweroff from enable/disable and define new funcs xinlei.lee
2022-05-11 2:36 ` [PATCH v5,4/5] drm/mediatek: keep dsi as LP00 before dcs cmds transfer xinlei.lee
2022-05-11 15:04 ` AngeloGioacchino Del Regno [this message]
2022-05-11 2:36 ` [PATCH v5,5/5] drm/mediatek: Add pull-down MIPI operation in mtk_dsi_poweroff function xinlei.lee
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