linux-kernel - [PATCH 7/7] drm/vc4: dpi: Fix format mapping for RGB565

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Message-Id: <20221013-rpi-dpi-improvements-v1-7-8a7a96949cb0@cerno.tech>
Date:   Thu, 13 Oct 2022 11:56:51 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     Maxime Ripard <mripard@...nel.org>, Eric Anholt <eric@...olt.net>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>, Rob Herring <robh@...nel.org>,
        Emma Anholt <emma@...olt.net>
Cc:     dri-devel@...ts.freedesktop.org,
        Joerg Quinten <aBUGSworstnightmare@...il.com>,
        Chris Morgan <macromorgan@...mail.com>,
        Maxime Ripard <maxime@...no.tech>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        linux-kernel@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: [PATCH 7/7] drm/vc4: dpi: Fix format mapping for RGB565

From: Dave Stevenson <dave.stevenson@...pberrypi.com>

The mapping is incorrect for RGB565_1X16 as it should be
DPI_FORMAT_18BIT_666_RGB_1 instead of DPI_FORMAT_18BIT_666_RGB_3.

Fixes: 08302c35b59d ("drm/vc4: Add DPI driver")
Signed-off-by: Dave Stevenson <dave.stevenson@...pberrypi.com>
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 drivers/gpu/drm/vc4/vc4_dpi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vc4/vc4_dpi.c b/drivers/gpu/drm/vc4/vc4_dpi.c
index fdae02760b6d..a7bebfa5d5b0 100644
--- a/drivers/gpu/drm/vc4/vc4_dpi.c
+++ b/drivers/gpu/drm/vc4/vc4_dpi.c
@@ -185,7 +185,7 @@ static void vc4_dpi_encoder_enable(struct drm_encoder *encoder)
 						       DPI_FORMAT);
 				break;
 			case MEDIA_BUS_FMT_RGB565_1X16:
-				dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_3,
+				dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_1,
 						       DPI_FORMAT);
 				break;
 			case MEDIA_BUS_FMT_RGB565_1X24_CPADHI:

-- 
b4 0.11.0-dev-7da52