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 1/8] dt-bindings: display: ti,am65x-dss: Add port properties for DSS
Date: Tue, 19 Jul 2022 13:38:38 +0530 [thread overview]
Message-ID: <20220719080845.22122-2-a-bhatia1@ti.com> (raw)
In-Reply-To: <20220719080845.22122-1-a-bhatia1@ti.com>
Add "ti,oldi-mode" property to indicate the tidss driver the OLDI output
mode. The 2 OLDI TXes on am625-dss allow a 3 different types of panel
connections with the board.
1. Single Link / Single Mode on OLDI TX 0 OR 1.
2. Single Link / Duplicate Mode on OLDI TX 0 and 1.
3. Dual Link / Single Mode on OLDI TX 0 and 1.
Add "ti,rgb565-to-888" property to override 16bit output from a videoport
for a bridge that only accepts 24bit RGB888 DPI input.
On some boards the HDMI bridge takes a 24bit DPI input, but only 16 data
pins are actually enabled from the SoC. This new property forces the
output to be RGB565 on a specific video port if the bridge requests a
24bit RGB color space.
This assumes that the video port is connected like so:
SoC : Bridge
R0 -> R3
R1 -> R4
R2 -> R5
R3 -> R6
R4 -> R7
G0 -> G2
G1 -> G3
G2 -> G4
G3 -> G5
G4 -> G6
G5 -> G7
B0 -> B3
B1 -> B4
B2 -> B5
B3 -> B6
B4 -> B7
On the bridge side R0->R2, G0->G1, B0->B2 would be tied to ground.
The bridge sees 24bits of data, but the lsb's are always zero.
Signed-off-by: Aradhya Bhatia <a-bhatia1@ti.com>
---
.../bindings/display/ti/ti,am65x-dss.yaml | 25 +++++++++++++++++--
1 file changed, 23 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
index 6bbce921479d..11d9b3821409 100644
--- a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
+++ b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
@@ -80,15 +80,35 @@ properties:
properties:
port@0:
- $ref: /schemas/graph.yaml#/properties/port
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
description:
The DSS OLDI output port node form video port 1
+ properties:
+ ti,oldi-mode:
+ description: TI specific property to indicate the mode the OLDI TXes
+ and the display panel are connected in.
+ 0 -> OLDI TXes OFF (driver default for am625-dss)
+ 1 -> Single link, Single Mode (OLDI0) (driver default for am65x-dss)
+ 2 -> Single link, Single Mode (OLDI1)
+ 3 -> Single link, Duplicate Mode
+ 4 -> Dual link (Only Single Mode)
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1, 2, 3, 4]
+
port@1:
- $ref: /schemas/graph.yaml#/properties/port
+ $ref: /schemas/graph.yaml#/$defs/port-base
+ unevaluatedProperties: false
description:
The DSS DPI output port node from video port 2
+ properties:
+ ti,rgb565-to-888:
+ description:
+ property to override DPI output to 16bit for 24bit bridge
+ type: boolean
+
ti,am65x-oldi-io-ctrl:
$ref: "/schemas/types.yaml#/definitions/phandle"
description:
@@ -144,6 +164,7 @@ examples:
#size-cells = <0>;
port@0 {
reg = <0>;
+ ti,oldi-mode = <1>;
oldi_out0: endpoint {
remote-endpoint = <&lcd_in0>;
};
--
2.37.0
next prev parent reply other threads:[~2022-07-19 8:09 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-19 8:08 sFrom b69208b75f7ae8e223c81783afb04fecd2f5faf8 Mon Sep 17 00:00:00 2001 Aradhya Bhatia
2022-07-19 8:08 ` Aradhya Bhatia [this message]
2022-07-20 23:28 ` [PATCH 1/8] dt-bindings: display: ti,am65x-dss: Add port properties for DSS Rob Herring
2022-07-22 16:16 ` Nishanth Menon
2022-07-28 6:28 ` Tomi Valkeinen
2022-07-25 11:26 ` Aradhya Bhatia
2022-07-25 22:14 ` Francesco Dolcini
2022-08-10 17:48 ` Rob Herring
2022-07-28 11:16 ` Tomi Valkeinen
2022-07-19 8:08 ` [PATCH 2/8] dt-bindings: display: ti,am65x-dss: Add IO CTRL property for AM625 OLDI Aradhya Bhatia
2022-07-20 23:32 ` Rob Herring
2022-07-25 11:34 ` Aradhya Bhatia
2022-07-19 8:08 ` [PATCH 3/8] drm/tidss: Add support for DSS port properties Aradhya Bhatia
2022-07-28 12:07 ` Tomi Valkeinen
2022-07-19 8:08 ` [PATCH 4/8] drm/tidss: Add support for Dual Link LVDS Bus Format Aradhya Bhatia
2022-07-28 11:03 ` Tomi Valkeinen
2022-07-28 11:45 ` Tomi Valkeinen
2022-08-09 5:58 ` Aradhya Bhatia
2022-08-09 6:28 ` Tomi Valkeinen
2022-08-09 9:06 ` Aradhya Bhatia
2022-08-09 9:51 ` Tomi Valkeinen
2022-08-09 13:34 ` Aradhya Bhatia
2022-08-01 3:32 ` Aradhya Bhatia
2022-07-19 8:08 ` [PATCH 5/8] drm/tidss: dt property to force 16bit VP output to a 24bit bridge Aradhya Bhatia
2022-07-19 8:08 ` [PATCH 6/8] drm/tidss: Add IO CTRL and Power support for OLDI TX in AM625 Aradhya Bhatia
2022-07-19 8:08 ` [PATCH 7/8] drm/tidss: Fix clock request value for OLDI videoports Aradhya Bhatia
2022-07-28 10:05 ` Tomi Valkeinen
2022-07-29 3:56 ` Aradhya Bhatia
2022-07-29 8:13 ` Tomi Valkeinen
2022-07-19 8:08 ` [PATCH 8/8] drm/tidss: Enable Dual and Duplicate Modes for OLDI Aradhya Bhatia
2022-07-27 13:22 ` Tomi Valkeinen
2022-07-28 6:46 ` Tomi Valkeinen
2022-07-28 8:49 ` Aradhya Bhatia
2022-07-28 11:29 ` Tomi Valkeinen
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