linux-kernel - [PATCH 04/10] drm: bridge: it66121: Write AVI infoframe with regmap_bulk

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Date:   Wed, 14 Dec 2022 13:58:15 +0100
From:   Paul Cercueil <paul@...pouillou.net>
To:     Phong LE <ple@...libre.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Andrzej Hajda <andrzej.hajda@...el.com>,
        Robert Foss <robert.foss@...aro.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     list@...ndingux.net, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH 04/10] drm: bridge: it66121: Write AVI infoframe with regmap_bulk_write()

Since all AVI infoframe registers are contiguous in the address space,
the AVI infoframe can be written in one go with regmap_bulk_write().

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
 drivers/gpu/drm/bridge/ite-it66121.c | 27 +++++++--------------------
 1 file changed, 7 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/bridge/ite-it66121.c b/drivers/gpu/drm/bridge/ite-it66121.c
index 12222840df30..0a4fdfd7af44 100644
--- a/drivers/gpu/drm/bridge/ite-it66121.c
+++ b/drivers/gpu/drm/bridge/ite-it66121.c
@@ -773,24 +773,9 @@ void it66121_bridge_mode_set(struct drm_bridge *bridge,
 			     const struct drm_display_mode *mode,
 			     const struct drm_display_mode *adjusted_mode)
 {
-	int ret, i;
 	u8 buf[HDMI_INFOFRAME_SIZE(AVI)];
 	struct it66121_ctx *ctx = container_of(bridge, struct it66121_ctx, bridge);
-	const u16 aviinfo_reg[HDMI_AVI_INFOFRAME_SIZE] = {
-		IT66121_AVIINFO_DB1_REG,
-		IT66121_AVIINFO_DB2_REG,
-		IT66121_AVIINFO_DB3_REG,
-		IT66121_AVIINFO_DB4_REG,
-		IT66121_AVIINFO_DB5_REG,
-		IT66121_AVIINFO_DB6_REG,
-		IT66121_AVIINFO_DB7_REG,
-		IT66121_AVIINFO_DB8_REG,
-		IT66121_AVIINFO_DB9_REG,
-		IT66121_AVIINFO_DB10_REG,
-		IT66121_AVIINFO_DB11_REG,
-		IT66121_AVIINFO_DB12_REG,
-		IT66121_AVIINFO_DB13_REG
-	};
+	int ret;
 
 	mutex_lock(&ctx->lock);
 
@@ -810,10 +795,12 @@ void it66121_bridge_mode_set(struct drm_bridge *bridge,
 	}
 
 	/* Write new AVI infoframe packet */
-	for (i = 0; i < HDMI_AVI_INFOFRAME_SIZE; i++) {
-		if (regmap_write(ctx->regmap, aviinfo_reg[i], buf[i + HDMI_INFOFRAME_HEADER_SIZE]))
-			goto unlock;
-	}
+	ret = regmap_bulk_write(ctx->regmap, IT66121_AVIINFO_DB1_REG,
+				&buf[HDMI_INFOFRAME_HEADER_SIZE],
+				HDMI_AVI_INFOFRAME_SIZE);
+	if (ret)
+		goto unlock;
+
 	if (regmap_write(ctx->regmap, IT66121_AVIINFO_CSUM_REG, buf[3]))
 		goto unlock;
 
-- 
2.35.1