Re: [PATCH 17/18] drm: rockchip: Add VOP2 driver

Hi Johan,

On Wed, Dec 08, 2021 at 05:59:16PM +0100, Johan Jonker wrote:

Hi,

On 12/8/21 4:12 PM, Sascha Hauer wrote:

quoted

From: Andy Yan <andy.yan@rock-chips.com>

The VOP2 unit is found on Rockchip SoCs beginning with rk3566/rk3568.
It replaces the VOP unit found in the older Rockchip SoCs.

This driver has been derived from the downstream Rockchip Kernel and
heavily modified:

- All nonstandard DRM properties have been removed
- dropped struct vop2_plane_state and pass around less data between
  functions
- Dropped all DRM_FORMAT_* not known on upstream
- rework register access to get rid of excessively used macros
- Drop all waiting for framesyncs

The driver is tested with HDMI and MIPI-DSI display on a RK3568-EVB
board. Overlay support is tested with the modetest utility. AFBC support
on the cluster windows is tested with weston-simple-dmabuf-egl on
weston using the (yet to be upstreamed) panfrost driver support.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---

[..]

quoted

+
+static const struct of_device_id vop2_dt_match[] = {
+	{
+		.compatible = "rockchip,rk3568-vop",
+		.data = &rk3568_vop
+	}, {

quoted

+		.compatible = "rockchip,rk3568-vop",

Maybe use:
.compatible = "rockchip,rk3566-vop",

Copy/Paste bug. Will fix.

quoted

+		.data = &rk3566_vop
+	}, {
+	},

Maybe sort this list alphabetical based on compatible in case later more
SoCs are added.

rk3566
rk3568

Ok.

===

The structure layout size above could be reduced for if we get more
compatible strings additions.

Example vop1:

static const struct of_device_id vop_driver_dt_match[] = {
	{ .compatible = "rockchip,rk3036-vop",
	  .data = &rk3036_vop },
	{ .compatible = "rockchip,rk3126-vop",
	  .data = &rk3126_vop },
	{ .compatible = "rockchip,px30-vop-big",
	  .data = &px30_vop_big },
	{ .compatible = "rockchip,px30-vop-lit",
	  .data = &px30_vop_lit },
	{ .compatible = "rockchip,rk3066-vop",
	  .data = &rk3066_vop },
	{ .compatible = "rockchip,rk3188-vop",
	  .data = &rk3188_vop },
	{ .compatible = "rockchip,rk3288-vop",
	  .data = &rk3288_vop },
	{ .compatible = "rockchip,rk3368-vop",
	  .data = &rk3368_vop },
	{ .compatible = "rockchip,rk3366-vop",
	  .data = &rk3366_vop },
	{ .compatible = "rockchip,rk3399-vop-big",
	  .data = &rk3399_vop_big },
	{ .compatible = "rockchip,rk3399-vop-lit",
	  .data = &rk3399_vop_lit },
	{ .compatible = "rockchip,rk3228-vop",
	  .data = &rk3228_vop },
	{ .compatible = "rockchip,rk3328-vop",
	  .data = &rk3328_vop },
	{},

It's shorter, but ugly ;)
That's only my personal taste though, I don't care much.

Sascha

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |