The binding expects the first register space to be VDEC_SYS. However
this register space is already assigned to a different node on both
MT8173 and MT8183: a clock-controller node called 'vdecsys' which is
also a syscon.
In order to resolve the overlapping address ranges, remove the VDEC_SYS
register space from the video decoder, and add a new property to hold
the phandle to the syscon, so that iospace can still be handled.
Also add reg-names to be able to tell that this new register schema is
used, so the driver can keep backward compatibility.
Signed-off-by: Nícolas F. R. A. Prado <[email protected]>
---
(no changes since v4)
Changes in v4:
- Removed VDEC_SYS reg from mt8173 as well
- Reworded commit
Changes in v3:
- Removed the active clock
- Added a mediatek,vdecsys syscon property
Changes in v2:
- Merged with patch 1 (media: dt-bindings: mediatek,vcodec: Allow single
clock for mt8183) to avoid changing number of clocks twice
- Added maxItems to reg-names
- Constrained clocks for each compatible
- Reordered properties for each compatible
.../media/mediatek,vcodec-decoder.yaml | 28 ++++++++++++++++---
1 file changed, 24 insertions(+), 4 deletions(-)
diff --git a/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml b/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
index 1e56ece44aee..b401c67e3ba0 100644
--- a/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
+++ b/Documentation/devicetree/bindings/media/mediatek,vcodec-decoder.yaml
@@ -21,7 +21,22 @@ properties:
- mediatek,mt8183-vcodec-dec
reg:
- maxItems: 12
+ minItems: 11
+ maxItems: 11
+
+ reg-names:
+ items:
+ - const: misc
+ - const: ld
+ - const: top
+ - const: cm
+ - const: ad
+ - const: av
+ - const: pp
+ - const: hwd
+ - const: hwq
+ - const: hwb
+ - const: hwg
interrupts:
maxItems: 1
@@ -60,6 +75,10 @@ properties:
description:
Describes point to scp.
+ mediatek,vdecsys:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description: Phandle to the vdecsys syscon node.
+
required:
- compatible
- reg
@@ -67,6 +86,7 @@ required:
- clocks
- clock-names
- iommus
+ - mediatek,vdecsys
allOf:
- if:
@@ -126,10 +146,9 @@ examples:
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/power/mt8173-power.h>
- vcodec_dec: vcodec@16000000 {
+ vcodec_dec: vcodec@16020000 {
compatible = "mediatek,mt8173-vcodec-dec";
- reg = <0x16000000 0x100>, /*VDEC_SYS*/
- <0x16020000 0x1000>, /*VDEC_MISC*/
+ reg = <0x16020000 0x1000>, /*VDEC_MISC*/
<0x16021000 0x800>, /*VDEC_LD*/
<0x16021800 0x800>, /*VDEC_TOP*/
<0x16022000 0x1000>, /*VDEC_CM*/
@@ -150,6 +169,7 @@ examples:
<&iommu M4U_PORT_HW_VDEC_VLD_EXT>,
<&iommu M4U_PORT_HW_VDEC_VLD2_EXT>;
mediatek,vpu = <&vpu>;
+ mediatek,vdecsys = <&vdecsys>;
power-domains = <&scpsys MT8173_POWER_DOMAIN_VDEC>;
clocks = <&apmixedsys CLK_APMIXED_VCODECPLL>,
<&topckgen CLK_TOP_UNIVPLL_D2>,
--
2.41.0
On 30/06/2023 17:14, Nícolas F. R. A. Prado wrote:
> The binding expects the first register space to be VDEC_SYS. However
> this register space is already assigned to a different node on both
> MT8173 and MT8183: a clock-controller node called 'vdecsys' which is
> also a syscon.
>
> In order to resolve the overlapping address ranges, remove the VDEC_SYS
> register space from the video decoder, and add a new property to hold
> the phandle to the syscon, so that iospace can still be handled.
>
> Also add reg-names to be able to tell that this new register schema is
> used, so the driver can keep backward compatibility.
>
> Signed-off-by: Nícolas F. R. A. Prado <[email protected]>
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Best regards,
Krzysztof