[PATCH v1 06/12] drm/bridge: cros-ec-anx7688: Use drm_bridge_funcs.atomic_check

[Sam Ravnborg <sam@ravnborg.org>]

Replace the deprecated drm_bridge_funcs.mode_fixup() with
drm_bridge_funcs.atomic_check().

drm_bridge_funcs.atomic_check() requires the atomic state operations,
update these to the default implementations.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Andrzej Hajda <andrzej.hajda@intel.com>
Cc: Neil Armstrong <narmstrong@baylibre.com>
Cc: Robert Foss <robert.foss@linaro.org>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Jonas Karlman <jonas@kwiboo.se>
Cc: Jernej Skrabec <jernej.skrabec@gmail.com>
Cc: Benson Leung <bleung@chromium.org>
Cc: Guenter Roeck <groeck@chromium.org>
Cc: chrome-platform@lists.linux.dev
---
 drivers/gpu/drm/bridge/cros-ec-anx7688.c | 28 +++++++++++++++---------
 1 file changed, 18 insertions(+), 10 deletions(-)

diff --git a/drivers/gpu/drm/bridge/cros-ec-anx7688.c b/drivers/gpu/drm/bridge/cros-ec-anx7688.c
index 0f6d907432e3..fc19ea87926f 100644
--- a/drivers/gpu/drm/bridge/cros-ec-anx7688.c
+++ b/drivers/gpu/drm/bridge/cros-ec-anx7688.c
@@ -5,6 +5,7 @@
  * Copyright 2020 Google LLC
  */
 
+#include <drm/drm_atomic_state_helper.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_print.h>
 #include <linux/i2c.h>
@@ -45,9 +46,10 @@ bridge_to_cros_ec_anx7688(struct drm_bridge *bridge)
 	return container_of(bridge, struct cros_ec_anx7688, bridge);
 }
 
-static bool cros_ec_anx7688_bridge_mode_fixup(struct drm_bridge *bridge,
-					      const struct drm_display_mode *mode,
-					      struct drm_display_mode *adjusted_mode)
+static int cros_ec_anx7688_bridge_atomic_check(struct drm_bridge *bridge,
+					       struct drm_bridge_state *bridge_state,
+					       struct drm_crtc_state *crtc_state,
+					       struct drm_connector_state *conn_state)
 {
 	struct cros_ec_anx7688 *anx = bridge_to_cros_ec_anx7688(bridge);
 	int totalbw, requiredbw;
@@ -56,13 +58,13 @@ static bool cros_ec_anx7688_bridge_mode_fixup(struct drm_bridge *bridge,
 	int ret;
 
 	if (!anx->filter)
-		return true;
+		return 0;
 
 	/* Read both regs 0x85 (bandwidth) and 0x86 (lane count). */
 	ret = regmap_bulk_read(anx->regmap, ANX7688_DP_BANDWIDTH_REG, regs, 2);
 	if (ret < 0) {
 		DRM_ERROR("Failed to read bandwidth/lane count\n");
-		return false;
+		return ret;
 	}
 	dpbw = regs[0];
 	lanecount = regs[1];
@@ -71,28 +73,34 @@ static bool cros_ec_anx7688_bridge_mode_fixup(struct drm_bridge *bridge,
 	if (dpbw > 0x19 || lanecount > 2) {
 		DRM_ERROR("Invalid bandwidth/lane count (%02x/%d)\n", dpbw,
 			  lanecount);
-		return false;
+		return -EINVAL;
 	}
 
 	/* Compute available bandwidth (kHz) */
 	totalbw = dpbw * lanecount * 270000 * 8 / 10;
 
 	/* Required bandwidth (8 bpc, kHz) */
-	requiredbw = mode->clock * 8 * 3;
+	requiredbw = crtc_state->mode.clock * 8 * 3;
 
 	DRM_DEBUG_KMS("DP bandwidth: %d kHz (%02x/%d); mode requires %d Khz\n",
 		      totalbw, dpbw, lanecount, requiredbw);
 
 	if (totalbw == 0) {
 		DRM_ERROR("Bandwidth/lane count are 0, not rejecting modes\n");
-		return true;
+		return 0;
 	}
 
-	return totalbw >= requiredbw;
+	if (totalbw < requiredbw)
+		return -EINVAL;
+
+	return 0;
 }
 
 static const struct drm_bridge_funcs cros_ec_anx7688_bridge_funcs = {
-	.mode_fixup = cros_ec_anx7688_bridge_mode_fixup,
+	.atomic_check = cros_ec_anx7688_bridge_atomic_check,
+	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
+	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
+	.atomic_reset = drm_atomic_helper_bridge_reset,
 };
 
 static int cros_ec_anx7688_bridge_probe(struct i2c_client *client)
-- 
2.34.1