From cc83959891cbb437dd8e1309c7d0bca287634bfa Mon Sep 17 00:00:00 2001
From: Maxime Ripard <mripard@kernel.org>
Date: Tue, 7 Jul 2026 17:11:32 +0200
Subject: [PATCH] drm/bridge: waveshare-dsi: Switch to atomic bridge callbacks

The waveshare-dsi bridge uses the legacy non-atomic enable and disable
bridge callbacks.

In order to remove the legacy bridge callback support from the DRM
bridge core, switch to their atomic counterparts and add the bridge
atomic state handlers.

Generated by the following Coccinelle script:

@ is_bridge @
identifier funcs;
@@

 struct drm_bridge_funcs funcs = {
	...,
 };

@ has_create_state depends on is_bridge @
identifier funcs, f;
@@

struct drm_bridge_funcs funcs = {
  ...,
  .atomic_create_state = f,
  ...,
};

@ update_struct depends on (is_bridge && !has_create_state) @
identifier is_bridge.funcs;
identifier f;
@@

 struct drm_bridge_funcs funcs = {
+	.atomic_create_state = drm_atomic_helper_bridge_create_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
 	...,
 };

@ update_pre_enable_struct depends on (is_bridge && !has_create_state) @
identifier is_bridge.funcs;
identifier f;
@@

 struct drm_bridge_funcs funcs = {
 	...,
-	.pre_enable = f,
+	.atomic_pre_enable = f,
 	...,
 };

@ update_pre_enable_impl depends on update_pre_enable_struct @
identifier update_pre_enable_struct.f;
identifier b;
@@

-void f(struct drm_bridge *b)
+void f(struct drm_bridge *b, struct drm_atomic_commit *commit)
 {
	...
 }

@ update_enable_struct depends on (is_bridge && !has_create_state) @
identifier is_bridge.funcs;
identifier f;
@@

 struct drm_bridge_funcs funcs = {
 	...,
-	.enable = f,
+	.atomic_enable = f,
 	...,
 };

@ update_enable_impl depends on update_enable_struct @
identifier update_enable_struct.f;
identifier b;
@@

-void f(struct drm_bridge *b)
+void f(struct drm_bridge *b, struct drm_atomic_commit *commit)
 {
	...
 }

@ update_disable_struct depends on (is_bridge && !has_create_state) @
identifier is_bridge.funcs;
identifier f;
@@

 struct drm_bridge_funcs funcs = {
 	...,
-	.disable = f,
+	.atomic_disable = f,
 	...,
 };

@ update_disable_impl depends on update_disable_struct @
identifier update_disable_struct.f;
identifier b;
@@

-void f(struct drm_bridge *b)
+void f(struct drm_bridge *b, struct drm_atomic_commit *commit)
 {
	...
 }

@ update_post_disable_struct depends on (is_bridge && !has_create_state) @
identifier is_bridge.funcs;
identifier f;
@@

 struct drm_bridge_funcs funcs = {
 	...,
-	.post_disable = f,
+	.atomic_post_disable = f,
 	...,
 };

@ update_post_disable_impl depends on update_post_disable_struct @
identifier update_post_disable_struct.f;
identifier b;
@@

-void f(struct drm_bridge *b)
+void f(struct drm_bridge *b, struct drm_atomic_commit *commit)
 {
	...
 }

Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://patch.msgid.link/20260707-drm-all-atomic-bridges-v2-25-21d03cbca446@kernel.org
Signed-off-by: Maxime Ripard <mripard@kernel.org>
---
 drivers/gpu/drm/bridge/waveshare-dsi.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/waveshare-dsi.c b/drivers/gpu/drm/bridge/waveshare-dsi.c
index ded57f298d64..9c9825c9b7c5 100644
--- a/drivers/gpu/drm/bridge/waveshare-dsi.c
+++ b/drivers/gpu/drm/bridge/waveshare-dsi.c
@@ -12,6 +12,7 @@
 #include <linux/of_graph.h>
 #include <linux/regmap.h>
 
+#include <drm/drm_atomic_state_helper.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_mipi_dsi.h>
 #include <drm/drm_of.h>
@@ -92,7 +93,8 @@ static int ws_bridge_bridge_attach(struct drm_bridge *bridge,
 				 &ws->bridge, flags);
 }
 
-static void ws_bridge_bridge_enable(struct drm_bridge *bridge)
+static void ws_bridge_bridge_enable(struct drm_bridge *bridge,
+				    struct drm_atomic_commit *commit)
 {
 	struct ws_bridge *ws = bridge_to_ws_bridge(bridge);
 
@@ -100,7 +102,8 @@ static void ws_bridge_bridge_enable(struct drm_bridge *bridge)
 	backlight_enable(ws->backlight);
 }
 
-static void ws_bridge_bridge_disable(struct drm_bridge *bridge)
+static void ws_bridge_bridge_disable(struct drm_bridge *bridge,
+				     struct drm_atomic_commit *commit)
 {
 	struct ws_bridge *ws = bridge_to_ws_bridge(bridge);
 
@@ -109,8 +112,11 @@ static void ws_bridge_bridge_disable(struct drm_bridge *bridge)
 }
 
 static const struct drm_bridge_funcs ws_bridge_bridge_funcs = {
-	.enable = ws_bridge_bridge_enable,
-	.disable = ws_bridge_bridge_disable,
+	.atomic_create_state = drm_atomic_helper_bridge_create_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+	.atomic_enable = ws_bridge_bridge_enable,
+	.atomic_disable = ws_bridge_bridge_disable,
 	.attach = ws_bridge_bridge_attach,
 };