[PATCH v3 0/2] drm/panel: simple: add Waveshare LCD panels

[PATCH v3 0/2] drm/panel: simple: add Waveshare LCD panels

[Dmitry Baryshkov]

Waveshare have a serie of DSI panel kits with the DPI or LVDS panel
being attached to the DSI2DPI or DSI2LVDS bridge. Commit 80b0eb11f8e0
("dt-bindings: display: panel: Add waveshare DPI panel support")
described two of them in the bindings and commit 46be11b678e0
("drm/panel: simple: Add Waveshare 13.3" panel support") added
definitions for one of those panels. Add support for the rest of them.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
Changes in v3:
- Rebased on drm-misc-next, dropping applied patches
- Link to v2: https://patch.msgid.link/20260331-ws-lcd-v2-0-a1add63b6eb6@oss.qualcomm.com

Changes in v2:
- Updated waveshare,dsi2dpi schema to implicitly mention LVDS
  (Krzysztof)
- Updated commit message to explain why the ICN6202 / ICN6211 bridges
  are not a part of the DT bindings.
- Link to v1: https://patch.msgid.link/20260330-ws-lcd-v1-0-309834a435c0@oss.qualcomm.com

---
Dmitry Baryshkov (2):
      dt-bindings: display: waveshare,dsp2dpi: describe DSI2LVDS setup
      drm/bridge: waveshare-dsi: support DSI LCD kits with LVDS panels

 .../devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml    | 9 ++++++---
 drivers/gpu/drm/bridge/waveshare-dsi.c                           | 5 +++--
 2 files changed, 9 insertions(+), 5 deletions(-)
---
base-commit: efcd474ed273ae7da614b30e798651c6d57d3109
change-id: 20260330-ws-lcd-b65c03c5ac17

Best regards,
--  
With best wishes
Dmitry

[PATCH v3 1/2] dt-bindings: display: waveshare,dsp2dpi: describe DSI2LVDS setup

[Dmitry Baryshkov]

Several the Waveshare DSI LCD panel kits use DSI2LVDS ICN6202 bridge
together with the LVDS panels. Define new compatible for the on-kit
bridge setup (it is not itmized and it uses Waveshare prefix since the
rest of the integration details are not known).

Note: the ICN6202 / ICN6211 bridges are completely handled by the board
itself, they should not be programmed by the host (which otherwise might
override correct params), etc. As such, it doesn't make sense to use
those in the compat strings. I consider those to be an internal detail
of the setup.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
 .../devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml    | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml b/Documentation/devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml
index 3820dd7e11af..4d34a92192bf 100644
--- a/Documentation/devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml
@@ -10,11 +10,14 @@ maintainers:
   - Joseph Guo <qijian.guo@nxp.com>
 
 description:
-  Waveshare bridge board is part of Waveshare panel which converts DSI to DPI.
+  Waveshare bridge board is part of Waveshare panel which converts DSI to DPI
+  or LVDS.
 
 properties:
   compatible:
-    const: waveshare,dsi2dpi
+    enum:
+      - waveshare,dsi2dpi
+      - waveshare,dsi2lvds
 
   reg:
     maxItems: 1
@@ -53,7 +56,7 @@ properties:
       port@1:
         $ref: /schemas/graph.yaml#/properties/port
         description:
-          Video port for MIPI DPI output panel.
+          Video port for MIPI DPI or LVDS output to the panel.
 
     required:
       - port@0

-- 
2.47.3

Re: [PATCH v3 1/2] dt-bindings: display: waveshare,dsp2dpi: describe DSI2LVDS setup

[Krzysztof Kozlowski]

On Sun, Apr 12, 2026 at 08:32:24PM +0300, Dmitry Baryshkov wrote:
> Several the Waveshare DSI LCD panel kits use DSI2LVDS ICN6202 bridge
> together with the LVDS panels. Define new compatible for the on-kit
> bridge setup (it is not itmized and it uses Waveshare prefix since the
> rest of the integration details are not known).
> 
> Note: the ICN6202 / ICN6211 bridges are completely handled by the board
> itself, they should not be programmed by the host (which otherwise might
> override correct params), etc. As such, it doesn't make sense to use
> those in the compat strings. I consider those to be an internal detail
> of the setup.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---
>  .../devicetree/bindings/display/bridge/waveshare,dsi2dpi.yaml    | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof

[PATCH v3 2/2] drm/bridge: waveshare-dsi: support DSI LCD kits with LVDS panels

[Dmitry Baryshkov]

Several Waveshare DSI LCD kits use LVDS panels and the ICN6202 DSI2LVDS
bridge. Support that setup by handling waveshare,dsi2lvds compatible.
The only difference with the existing waveshare,dsi2dpi is the bridge's
output type (LVDS vs DPI).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
 drivers/gpu/drm/bridge/waveshare-dsi.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/waveshare-dsi.c b/drivers/gpu/drm/bridge/waveshare-dsi.c
index 32d40414adb9..ded57f298d64 100644
--- a/drivers/gpu/drm/bridge/waveshare-dsi.c
+++ b/drivers/gpu/drm/bridge/waveshare-dsi.c
@@ -177,7 +177,7 @@ static int ws_bridge_probe(struct i2c_client *i2c)
 	regmap_write(ws->reg_map, 0xc2, 0x01);
 	regmap_write(ws->reg_map, 0xac, 0x01);
 
-	ws->bridge.type = DRM_MODE_CONNECTOR_DPI;
+	ws->bridge.type = (uintptr_t)i2c_get_match_data(i2c);
 	ws->bridge.of_node = dev->of_node;
 	devm_drm_bridge_add(dev, &ws->bridge);
 
@@ -185,7 +185,8 @@ static int ws_bridge_probe(struct i2c_client *i2c)
 }
 
 static const struct of_device_id ws_bridge_of_ids[] = {
-	{.compatible = "waveshare,dsi2dpi",},
+	{.compatible = "waveshare,dsi2dpi", .data = (void *)DRM_MODE_CONNECTOR_DPI, },
+	{.compatible = "waveshare,dsi2lvds", .data = (void *)DRM_MODE_CONNECTOR_LVDS, },
 	{ }
 };
 

-- 
2.47.3

Re: [PATCH v3 2/2] drm/bridge: waveshare-dsi: support DSI LCD kits with LVDS panels

[Neil Armstrong]

On 4/12/26 19:32, Dmitry Baryshkov wrote:
> Several Waveshare DSI LCD kits use LVDS panels and the ICN6202 DSI2LVDS
> bridge. Support that setup by handling waveshare,dsi2lvds compatible.
> The only difference with the existing waveshare,dsi2dpi is the bridge's
> output type (LVDS vs DPI).
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---
>   drivers/gpu/drm/bridge/waveshare-dsi.c | 5 +++--
>   1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/waveshare-dsi.c b/drivers/gpu/drm/bridge/waveshare-dsi.c
> index 32d40414adb9..ded57f298d64 100644
> --- a/drivers/gpu/drm/bridge/waveshare-dsi.c
> +++ b/drivers/gpu/drm/bridge/waveshare-dsi.c
> @@ -177,7 +177,7 @@ static int ws_bridge_probe(struct i2c_client *i2c)
>   	regmap_write(ws->reg_map, 0xc2, 0x01);
>   	regmap_write(ws->reg_map, 0xac, 0x01);
>   
> -	ws->bridge.type = DRM_MODE_CONNECTOR_DPI;
> +	ws->bridge.type = (uintptr_t)i2c_get_match_data(i2c);
>   	ws->bridge.of_node = dev->of_node;
>   	devm_drm_bridge_add(dev, &ws->bridge);
>   
> @@ -185,7 +185,8 @@ static int ws_bridge_probe(struct i2c_client *i2c)
>   }
>   
>   static const struct of_device_id ws_bridge_of_ids[] = {
> -	{.compatible = "waveshare,dsi2dpi",},
> +	{.compatible = "waveshare,dsi2dpi", .data = (void *)DRM_MODE_CONNECTOR_DPI, },
> +	{.compatible = "waveshare,dsi2lvds", .data = (void *)DRM_MODE_CONNECTOR_LVDS, },
>   	{ }
>   };
>   
> 

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

Thanks,
Neil

Re: [PATCH v3 2/2] drm/bridge: waveshare-dsi: support DSI LCD kits with LVDS panels

[Luca Ceresoli]

On Sun Apr 12, 2026 at 7:32 PM CEST, Dmitry Baryshkov wrote:
> Several Waveshare DSI LCD kits use LVDS panels and the ICN6202 DSI2LVDS
> bridge. Support that setup by handling waveshare,dsi2lvds compatible.
> The only difference with the existing waveshare,dsi2dpi is the bridge's
> output type (LVDS vs DPI).
>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>

Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

--
Luca Ceresoli, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com