[PATCH 5/8] drm/tidss: dt property to force 16bit VP output to a 24bit bridge

From: Aradhya Bhatia <a-bhatia1@ti.com>
To: Tomi Valkeinen <tomba@kernel.org>, Jyri Sarha <jyri.sarha@iki.fi>,
	Rob Herring <robh+dt@kernel.org>, David Airlie <airlied@linux.ie>,
	Daniel Vetter <daniel@ffwll.ch>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: Darren Etheridge <detheridge@ti.com>, Nishanth Menon <nm@ti.com>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	Rahul T R <r-ravikumar@ti.com>, Krunal Bhargav <k-bhargav@ti.com>,
	Devarsh Thakkar <devarsht@ti.com>,
	DRI Development List <dri-devel@lists.freedesktop.org>,
	Devicetree List <devicetree@vger.kernel.org>,
	Linux Kernel List <linux-kernel@vger.kernel.org>
Subject: [PATCH 5/8] drm/tidss: dt property to force 16bit VP output to a 24bit bridge
Date: Tue, 19 Jul 2022 13:38:42 +0530	[thread overview]
Message-ID: <20220719080845.22122-6-a-bhatia1@ti.com> (raw)
In-Reply-To: <20220719080845.22122-1-a-bhatia1@ti.com>

Override the DSS Videoport to output 16bit RGB565 instead of 24bit
RGB888 when the dt property "ti,rgb565-to-888" has been enanbled.

Co-developed-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Darren Etheridge <detheridge@ti.com>
Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
---
 drivers/gpu/drm/tidss/tidss_dispc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/tidss/tidss_dispc.c b/drivers/gpu/drm/tidss/tidss_dispc.c
index fb1fdecfc83a..94fce035c1d7 100644
--- a/drivers/gpu/drm/tidss/tidss_dispc.c
+++ b/drivers/gpu/drm/tidss/tidss_dispc.c
@@ -896,6 +896,8 @@ struct dispc_bus_format *dispc_vp_find_bus_fmt(struct dispc_device *dispc,
 	if (dispc->feat->vp_bus_type[hw_videoport] == DISPC_VP_OLDI &&
 	    dispc->oldi_mode == OLDI_DUAL_LINK)
 		is_dual_link = true;
+	else if (bus_fmt == MEDIA_BUS_FMT_RGB888_1X24 && dispc->rgb565_to_888)
+		bus_fmt = MEDIA_BUS_FMT_RGB565_1X16;
 
 	for (i = 0; i < ARRAY_SIZE(dispc_bus_formats); ++i) {
 		if (dispc_bus_formats[i].bus_fmt == bus_fmt &&
-- 
2.37.0

