[PATCH v2 1/2] media: dt-bindings: nxp,imx8-jpeg: Document optional SRAM support

[Marek Vasut <marek.vasut@mailbox.org>]

Document optional phandle to mmio-sram, which can describe an SRAM
region used for descriptor storage instead of regular DRAM region.
Use of SRAM instead of DRAM for descriptor storage may improve bus
access pattern and performance.

Signed-off-by: Marek Vasut <marek.vasut@mailbox.org>
---
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Ming Qian <ming.qian@oss.nxp.com>
Cc: Mirela Rabulea <mirela.rabulea@nxp.com>
Cc: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: imx@lists.linux.dev
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-media@vger.kernel.org
---
V2: - New patch
---
 Documentation/devicetree/bindings/media/nxp,imx8-jpeg.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/nxp,imx8-jpeg.yaml b/Documentation/devicetree/bindings/media/nxp,imx8-jpeg.yaml
index 4cba42ba7cf72..e3170647f44db 100644
--- a/Documentation/devicetree/bindings/media/nxp,imx8-jpeg.yaml
+++ b/Documentation/devicetree/bindings/media/nxp,imx8-jpeg.yaml
@@ -55,6 +55,12 @@ properties:
     minItems: 1               # Wrapper and all slots
     maxItems: 5               # Wrapper and 4 slots
 
+  sram:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: |
+      Optional phandle to a reserved on-chip SRAM regions. The SRAM can
+      be used for descriptor storage, which may improve bus utilization.
+
 required:
   - compatible
   - reg
-- 
2.51.0