linux-kernel - [PATCH v1 5/6] drm/bridge: tc358768: Add parallel data format cfg

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Message-Id: <20230330095941.428122-6-francesco@dolcini.it>
Date:   Thu, 30 Mar 2023 11:59:40 +0200
From:   Francesco Dolcini <francesco@...cini.it>
To:     Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        dri-devel@...ts.freedesktop.org
Cc:     Francesco Dolcini <francesco.dolcini@...adex.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, linux-kernel@...r.kernel.org
Subject: [PATCH v1 5/6] drm/bridge: tc358768: Add parallel data format cfg

From: Francesco Dolcini <francesco.dolcini@...adex.com>

Add configuration for parallel data format register, tc358768 supports
different mapping on the parallel input RGB interface, enable the
configuration for it.

Valid values, and the related meaning, are:
  0 = R[7:0], G[7:0], B[7:0]
  1 = R[1:0], G[1:0], B[1:0], R[7:2], G[7:2], B[7:2]
  2 = 8’b0, R[4:0], G[5:0], B[4:0]

Use 0 by default, consistently with the HW default.

Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
---
 drivers/gpu/drm/bridge/tc358768.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c
index f4499ae7bee6..4462264274af 100644
--- a/drivers/gpu/drm/bridge/tc358768.c
+++ b/drivers/gpu/drm/bridge/tc358768.c
@@ -854,6 +854,11 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge)
 	if (mode->flags & DRM_MODE_FLAG_PHSYNC)
 		tc358768_update_bits(priv, TC358768_PP_MISC, BIT(0), BIT(0));
 
+	/* PDataF: Parallel Data Format */
+	val = 0;
+	of_property_read_u32(bridge->of_node, "toshiba,input-rgb-mode", &val);
+	tc358768_update_bits(priv, TC358768_CONFCTL, BIT(8) | BIT(9), val << 8);
+
 	/* Start DSI Tx */
 	tc358768_write(priv, TC358768_DSI_START, 0x1);
 
-- 
2.25.1