[PATCH v1 11/12] drm/bridge: Drop drm_bridge_funcs.mode_fixup

[Sam Ravnborg]

All users are converted over to drm_bridge_funcs.atomic_check()
so it is safe to drop the mode_fixup support.

Update the comment for atomic_check with relevant parts from mode_fixup.

Signed-off-by: Sam Ravnborg <sam at ravnborg.org>
Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
Cc: Maxime Ripard <mripard at kernel.org>
Cc: Thomas Zimmermann <tzimmermann at suse.de>
Cc: David Airlie <airlied at linux.ie>
Cc: Daniel Vetter <daniel at ffwll.ch>
---
 drivers/gpu/drm/drm_bridge.c |  7 +----
 include/drm/drm_bridge.h     | 60 ++++++++++--------------------------
 2 files changed, 17 insertions(+), 50 deletions(-)

diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
index b6f56d8f3547..3f5acb19957c 100644
--- a/drivers/gpu/drm/drm_bridge.c
+++ b/drivers/gpu/drm/drm_bridge.c
@@ -685,10 +685,6 @@ static int drm_atomic_bridge_check(struct drm_bridge *bridge,
 						  crtc_state, conn_state);
 		if (ret)
 			return ret;
-	} else if (bridge->funcs->mode_fixup) {
-		if (!bridge->funcs->mode_fixup(bridge, &crtc_state->mode,
-					       &crtc_state->adjusted_mode))
-			return -EINVAL;
 	}
 
 	return 0;
@@ -934,8 +930,7 @@ drm_atomic_bridge_propagate_bus_flags(struct drm_bridge *bridge,
  * @conn_state: new connector state
  *
  * First trigger a bus format negotiation before calling
- * &drm_bridge_funcs.atomic_check() (falls back on
- * &drm_bridge_funcs.mode_fixup()) op for all the bridges in the encoder chain,
+ * &drm_bridge_funcs.atomic_check() op for all the bridges in the encoder chain,
  * starting from the last bridge to the first. These are called before calling
  * &drm_encoder_helper_funcs.atomic_check()
  *
diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h
index 7496f41535b1..8c93369bcc74 100644
--- a/include/drm/drm_bridge.h
+++ b/include/drm/drm_bridge.h
@@ -106,7 +106,7 @@ struct drm_bridge_funcs {
 	 * to look at anything else but the passed-in mode, and validate it
 	 * against configuration-invariant hardward constraints. Any further
 	 * limits which depend upon the configuration can only be checked in
-	 * @mode_fixup.
+	 * @atomic_check.
 	 *
 	 * RETURNS:
 	 *
@@ -116,46 +116,6 @@ struct drm_bridge_funcs {
 					   const struct drm_display_info *info,
 					   const struct drm_display_mode *mode);
 
-	/**
-	 * @mode_fixup:
-	 *
-	 * This callback is used to validate and adjust a mode. The parameter
-	 * mode is the display mode that should be fed to the next element in
-	 * the display chain, either the final &drm_connector or the next
-	 * &drm_bridge. The parameter adjusted_mode is the input mode the bridge
-	 * requires. It can be modified by this callback and does not need to
-	 * match mode. See also &drm_crtc_state.adjusted_mode for more details.
-	 *
-	 * This is the only hook that allows a bridge to reject a modeset. If
-	 * this function passes all other callbacks must succeed for this
-	 * configuration.
-	 *
-	 * The mode_fixup callback is optional. &drm_bridge_funcs.mode_fixup()
-	 * is not called when &drm_bridge_funcs.atomic_check() is implemented,
-	 * so only one of them should be provided.
-	 *
-	 * NOTE:
-	 *
-	 * This function is called in the check phase of atomic modesets, which
-	 * can be aborted for any reason (including on userspace's request to
-	 * just check whether a configuration would be possible). Drivers MUST
-	 * NOT touch any persistent state (hardware or software) or data
-	 * structures except the passed in @state parameter.
-	 *
-	 * Also beware that userspace can request its own custom modes, neither
-	 * core nor helpers filter modes to the list of probe modes reported by
-	 * the GETCONNECTOR IOCTL and stored in &drm_connector.modes. To ensure
-	 * that modes are filtered consistently put any bridge constraints and
-	 * limits checks into @mode_valid.
-	 *
-	 * RETURNS:
-	 *
-	 * True if an acceptable configuration is possible, false if the modeset
-	 * operation should be rejected.
-	 */
-	bool (*mode_fixup)(struct drm_bridge *bridge,
-			   const struct drm_display_mode *mode,
-			   struct drm_display_mode *adjusted_mode);
 	/**
 	 * @disable:
 	 *
@@ -466,9 +426,7 @@ struct drm_bridge_funcs {
 	 * &drm_bridge_funcs.atomic_check() hooks are called in reverse
 	 * order (from the last to the first bridge).
 	 *
-	 * This method is optional. &drm_bridge_funcs.mode_fixup() is not
-	 * called when &drm_bridge_funcs.atomic_check() is implemented, so only
-	 * one of them should be provided.
+	 * This method is optional.
 	 *
 	 * If drivers need to tweak &drm_bridge_state.input_bus_cfg.flags or
 	 * &drm_bridge_state.output_bus_cfg.flags it should happen in
@@ -478,6 +436,20 @@ struct drm_bridge_funcs {
 	 * &drm_connector.display_info.bus_flags if the bridge is the last
 	 * element in the chain.
 	 *
+	 * NOTE:
+	 *
+	 * This function is called in the check phase of atomic modesets, which
+	 * can be aborted for any reason (including on userspace's request to
+	 * just check whether a configuration would be possible). Drivers MUST
+	 * NOT touch any persistent state (hardware or software) or data
+	 * structures except the passed in @state parameter.
+	 *
+	 * Also beware that userspace can request its own custom modes, neither
+	 * core nor helpers filter modes to the list of probe modes reported by
+	 * the GETCONNECTOR IOCTL and stored in &drm_connector.modes. To ensure
+	 * that modes are filtered consistently put any bridge constraints and
+	 * limits checks into @mode_valid.
+	 *
 	 * RETURNS:
 	 * zero if the check passed, a negative error code otherwise.
 	 */
-- 
2.34.1