linux-kernel - Re: [PATCH v2] drm/panel: kingdisplay-kd097d04: Disable EoTp

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Message-ID: <cdb7ab69-3037-44c9-834b-1d747b299ea4@linaro.org>
Date: Wed, 29 Oct 2025 21:39:38 +0100
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Sebastian Fleer <dev@...rp.de>, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Cc: Christoph Fritz <chf.fritz@...glemail.com>,
 Jessica Zhang <jesszhan0024@...il.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
 Jens Reidel <adrian@...tmarketos.org>
Subject: Re: [PATCH v2] drm/panel: kingdisplay-kd097d04: Disable EoTp

On 10/29/25 13:35, Sebastian Fleer wrote:
> Since commit d97e71e44937 ("drm/bridge: synopsys: dw-mipi-dsi: enable EoTp by
> default") panel output on an Acer Chromebook Tab 10 (google-dru) is corrupted.
> The tablet I use is equipped with a kingdisplay-kd097d04 panel, disabling EoTp
> restores the correct functionality.
> 
> Fixes: 2a994cbed6b2 ("drm/panel: Add Kingdisplay KD097D04 panel driver")
> Suggested-by: Jens Reidel <adrian@...tmarketos.org>
> Signed-off-by: Sebastian Fleer <dev@...rp.de>
> ---
> 
> Changes in v2:
> - Reference correct commit in Fixes tag
> - Added Suggested-by
> 
> ---
>   drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c
> index 2fc7b0779b37..893af9b16756 100644
> --- a/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c
> +++ b/drivers/gpu/drm/panel/panel-kingdisplay-kd097d04.c
> @@ -359,7 +359,7 @@ static int kingdisplay_panel_probe(struct mipi_dsi_device *dsi)
>   	dsi->lanes = 4;
>   	dsi->format = MIPI_DSI_FMT_RGB888;
>   	dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
> -			  MIPI_DSI_MODE_LPM;
> +			  MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_NO_EOT_PACKET;
>   
>   	kingdisplay = devm_drm_panel_alloc(&dsi->dev, __typeof(*kingdisplay), base,
>   					   &kingdisplay_panel_funcs,

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>