Hi Luca,

On 12/31/2025 7:11 PM, Luca Ceresoli wrote:

Hello Damon,

On Wed Dec 17, 2025 at 10:33 AM CET, Damon Ding wrote:

quoted

In order to move the panel/bridge parsing and attachmenet to the
Analogix side, add component struct drm_bridge *next_bridge to
platform data struct analogix_dp_plat_data.

The movement makes sense because the panel/bridge should logically
be positioned behind the Analogix bridge in the display pipeline.

Signed-off-by: Damon Ding <redacted>
Reviewed-by: Dmitry Baryshkov <redacted>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>

---

Changes in v4:
- Rename the &analogix_dp_plat_data.bridge to
   &analogix_dp_plat_data.next_bridge
---
  include/drm/bridge/analogix_dp.h | 1 +
  1 file changed, 1 insertion(+)

diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h
index cf17646c1310..582357c20640 100644
--- a/include/drm/bridge/analogix_dp.h
+++ b/include/drm/bridge/analogix_dp.h

@@ -27,6 +27,7 @@ static inline bool is_rockchip(enum analogix_dp_devtype type)
  struct analogix_dp_plat_data {
  	enum analogix_dp_devtype dev_type;
  	struct drm_panel *panel;
+	struct drm_bridge *next_bridge;
  	struct drm_encoder *encoder;
  	struct drm_connector *connector;
  	bool skip_connector;

It took a while to understand why you are adding the next_bridge pointer in
struct analogix_dp_plat_data instead of struct analogix_dp_device, where it
would be more natural. I found an answer in patch 16: with current code you
need to place next_bridge in struct analogix_dp_plat_data because it is
used by user drivers to attach, and those drivers have no access to struct
analogix_dp_device. However patch 16 (which looks a very good cleanup BTW)
next_bridge can be moved to struct analogix_dp_device.

So I'd suggest to move patch 16 before this one if it easily doable, so
that you can introduce next_bridge in struct analogix_dp_device from the
beginning. Should that be impossible, you can send a separate patch to move
next_bridge, after patch 16.

Thanks for your nice suggestion! After patch 16, bridge attachment is 
unified to the Analogix side, which acts as a common bridge driver for 
both the Rockchip and Exynos sides, so moving next_bridge there makes 
perfect sense. I will add a separate patch to move next_bridge in v9.

Best regards,
Damon