linux-kernel - [PATCH v4 1/2] dt-bindings: display: ti,am65x-dss: Add support for common1 region

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Message-ID: <20240215115516.3157909-2-devarsht@ti.com>
Date: Thu, 15 Feb 2024 17:25:15 +0530
From: Devarsh Thakkar <devarsht@...com>
To: <jyri.sarha@....fi>, <tomi.valkeinen@...asonboard.com>,
        <airlied@...il.com>, <daniel@...ll.ch>,
        <maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
        <tzimmermann@...e.de>, <robh@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>
CC: <praneeth@...com>, <a-bhatia1@...com>, <j-luthra@...com>,
        <devarsht@...com>
Subject: [PATCH v4 1/2] dt-bindings: display: ti,am65x-dss: Add support for common1 region

TI keystone display subsystem present in AM65 and other SoCs such as AM62
support two separate register spaces namely "common" and "common1" which
can be used by two separate hosts to program the display controller as
described in respective Technical Reference Manuals [1].

The common1 register space has similar set of configuration registers as
supported in common register space except the global configuration
registers which are exclusive to common region.

This adds binding for "common1" register region too as supported by the
hardware.

[1]:
AM62x TRM:
https://www.ti.com/lit/pdf/spruiv7 (Section 14.8.9.1 DSS Registers)

AM65x TRM:
https://www.ti.com/lit/pdf/spruid7 (Section 12.6.5 DSS Registers)

AM62A TRM:
https://www.ti.com/lit/pdf/spruj16 (Section 14.9.9 Display Subsystem Registers)

Fixes: 2d8730f1021f ("dt-bindings: display: ti,am65x-dss: Add dt-schema yaml binding")
Signed-off-by: Devarsh Thakkar <devarsht@...com>
Reviewed-by: Aradhya Bhatia <a-bhatia1@...com>
Acked-by: Conor Dooley <conor.dooley@...rochip.com>
---
V2: Add Acked-by tag
V3: Add Fixes tag
V4: Add Reviewed-by and AM62A TRM link
---
 .../devicetree/bindings/display/ti/ti,am65x-dss.yaml       | 7 +++++--
 1 file changed, 5 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 b6767ef0d24d..55e3e490d0e6 100644
--- a/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
+++ b/Documentation/devicetree/bindings/display/ti/ti,am65x-dss.yaml
@@ -37,6 +37,7 @@ properties:
       - description: OVR2 overlay manager for vp2
       - description: VP1 video port 1
       - description: VP2 video port 2
+      - description: common1 DSS register area
 
   reg-names:
     items:
@@ -47,6 +48,7 @@ properties:
       - const: ovr2
       - const: vp1
       - const: vp2
+      - const: common1
 
   clocks:
     items:
@@ -147,9 +149,10 @@ examples:
                     <0x04a07000 0x1000>, /* ovr1 */
                     <0x04a08000 0x1000>, /* ovr2 */
                     <0x04a0a000 0x1000>, /* vp1 */
-                    <0x04a0b000 0x1000>; /* vp2 */
+                    <0x04a0b000 0x1000>, /* vp2 */
+                    <0x04a01000 0x1000>; /* common1 */
             reg-names = "common", "vidl1", "vid",
-                    "ovr1", "ovr2", "vp1", "vp2";
+                    "ovr1", "ovr2", "vp1", "vp2", "common1";
             ti,am65x-oldi-io-ctrl = <&dss_oldi_io_ctrl>;
             power-domains = <&k3_pds 67 TI_SCI_PD_EXCLUSIVE>;
             clocks =        <&k3_clks 67 1>,
-- 
2.34.1