[PATCH v2 3/3] arm64: dts: rockchip: enable gamma control on RK3399

[Hugh Cole-Baker]

> On 15 Sep 2022, at 15:40, Robin Murphy <robin.murphy at arm.com> wrote:
> 
> On 2021-10-19 22:58, Hugh Cole-Baker wrote:
>> Define the memory region on RK3399 VOPs containing the gamma LUT at
>> base+0x2000.
>> Signed-off-by: Hugh Cole-Baker <sigmaris at gmail.com>
>> ---
>> Changes from v1: no changes in this patch
>>  arch/arm64/boot/dts/rockchip/rk3399.dtsi | 4 ++--
>>  1 file changed, 2 insertions(+), 2 deletions(-)
>> diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
>> index 3871c7fd83b0..9cbf6ccdd256 100644
>> --- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
>> +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
>> @@ -1619,7 +1619,7 @@ i2s2: i2s at ff8a0000 {
>>    	vopl: vop at ff8f0000 {
>>  		compatible = "rockchip,rk3399-vop-lit";
>> -		reg = <0x0 0xff8f0000 0x0 0x3efc>;
>> +		reg = <0x0 0xff8f0000 0x0 0x2000>, <0x0 0xff8f2000 0x0 0x400>;
>>  		interrupts = <GIC_SPI 119 IRQ_TYPE_LEVEL_HIGH 0>;
>>  		assigned-clocks = <&cru ACLK_VOP1>, <&cru HCLK_VOP1>;
>>  		assigned-clock-rates = <400000000>, <100000000>;
>> @@ -1676,7 +1676,7 @@ vopl_mmu: iommu at ff8f3f00 {
>>    	vopb: vop at ff900000 {
>>  		compatible = "rockchip,rk3399-vop-big";
>> -		reg = <0x0 0xff900000 0x0 0x3efc>;
>> +		reg = <0x0 0xff900000 0x0 0x2000>, <0x0 0xff902000 0x0 0x1000>;
> 
> Doesn't the second range still need to be shorter than 0xf00 to avoid overlapping the IOMMU?
> 
> Robin.

This should be OK, the other registers are in the range ff900000-ff902000, the
gamma LUT occupies the range ff902000-ff903000, and then the IOMMU registers
begin at ff903f00. I don't see any overlaps with the IOMMU unless I'm
misreading the dts.

>>  		interrupts = <GIC_SPI 118 IRQ_TYPE_LEVEL_HIGH 0>;
>>  		assigned-clocks = <&cru ACLK_VOP0>, <&cru HCLK_VOP0>;
>>  		assigned-clock-rates = <400000000>, <100000000>;

br, Hugh.