linux-kernel - [PATCH v3 2/3] drm/mipi-dsi: Add flag to support dual-panel configurations

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Message-Id: <20250924-dsi-dual-panel-upstream-v3-2-6927284f1098@linaro.org>
Date: Wed, 24 Sep 2025 23:08:11 +0800
From: Jun Nie <jun.nie@...aro.org>
To: Rob Clark <robin.clark@....qualcomm.com>, 
 Abhinav Kumar <abhinav.kumar@...ux.dev>, 
 Jessica Zhang <jessica.zhang@....qualcomm.com>, 
 Dmitry Baryshkov <lumag@...nel.org>, Sean Paul <sean@...rly.run>, 
 Marijn Suijten <marijn.suijten@...ainline.org>, 
 David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Krishna Manikandan <quic_mkrishn@...cinc.com>
Cc: linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
 freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org, 
 devicetree@...r.kernel.org, Jun Nie <jun.nie@...aro.org>
Subject: [PATCH v3 2/3] drm/mipi-dsi: Add flag to support dual-panel
 configurations

Some devices treat two independent physical DSI panels as a single
logical panel from the CRTC's perspective. However, two separate DSI
hosts are still required to drive the panels individually.

Introduce a `dual_panel` flag to the `mipi_dsi_device` struct. This
allows a panel driver to inform the DSI host that it is part of a
dual-panel setup, enabling the host to coordinate both physical
displays as one.

Signed-off-by: Jun Nie <jun.nie@...aro.org>
---
 include/drm/drm_mipi_dsi.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 5a85ba01f402a3866b70828391bb417bb8dd5956..0faff285d9ffeb19e4523cdc7bf21c1ec20e6eff 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -170,6 +170,7 @@ struct mipi_dsi_device_info {
  * @host: DSI host for this peripheral
  * @dev: driver model device node for this peripheral
  * @attached: the DSI device has been successfully attached
+ * @dual_panel: the DSI device is one instance of dual panel
  * @name: DSI peripheral chip type
  * @channel: virtual channel assigned to the peripheral
  * @format: pixel format for video mode
@@ -188,6 +189,7 @@ struct mipi_dsi_device {
 	struct mipi_dsi_host *host;
 	struct device dev;
 	bool attached;
+	bool dual_panel;
 
 	char name[DSI_DEV_NAME_SIZE];
 	unsigned int channel;

-- 
2.34.1