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* [PATCH v2 0/5] 32-bit Meson: add the canvas module
@ 2019-05-20 19:43 Martin Blumenstingl
  2019-05-20 19:43 ` [PATCH v2 1/5] dt-bindings: soc: amlogic: canvas: document support for Meson8/8b/8m2 Martin Blumenstingl
                   ` (5 more replies)
  0 siblings, 6 replies; 9+ messages in thread
From: Martin Blumenstingl @ 2019-05-20 19:43 UTC (permalink / raw)
  To: linux-amlogic, khilman, mjourdan, robh+dt, mark.rutland, devicetree
  Cc: Martin Blumenstingl, linux-kernel, linux-arm-kernel

This adds the canvas module on Meson8, Meson8b and Meson8m2. The canvas
IP is used by the video decoder hardware as well as the VPU (video
output) hardware.

Neither the VPU nor the video decoder driver support the 32-bit SoCs
yet. However, we can still add the canvas module to have it available
once these drivers gain support for the older SoCs.

I have tested this on my Meson8m2 board by hacking the VPU driver to
not re-initialize the VPU (and to use the configuration set by u-boot).
With that hack I could get some image out of the CVBS connector. No
changes to the canvas driver were required.

Due to lack of hardware I could not test Meson8, but I'm following (as
always) what the Amlogic 3.10 vendor kernel uses.
Meson8b is also not tested because u-boot of my EC-100 doesn't have
video output enabled (so I couldn't use the same hack I used on my
Meson8m2 board).

This series meant to be applied on top of "Meson8b: add support for the
RTC on EC-100 and Odroid-C1" from [0]


changes since v1 at [1]:
- added new bindings for the 32-bit SoCs because they don't support the
  "endianness" configuration (new patch #1, thanks to Maxime Jourdan
  for pointing this out)
- update the driver to reject the "endianness" configuration on the
  32-bit SoCs (new patch #2)
- patches #3 to #5 haven't changed compared to v1


[0] https://patchwork.kernel.org/cover/10899509/
[1] https://patchwork.kernel.org/cover/10899565/


Martin Blumenstingl (5):
  dt-bindings: soc: amlogic: canvas: document support for Meson8/8b/8m2
  soc: amlogic: canvas: add support for Meson8, Meson8b and Meson8m2
  ARM: dts: meson8: add the canvas module
  ARM: dts: meson8m2: update the offset of the canvas module
  ARM: dts: meson8b: add the canvas module

 .../bindings/soc/amlogic/amlogic,canvas.txt   | 10 ++++++---
 arch/arm/boot/dts/meson8.dtsi                 | 22 +++++++++++++++++++
 arch/arm/boot/dts/meson8b.dtsi                | 22 +++++++++++++++++++
 arch/arm/boot/dts/meson8m2.dtsi               | 10 +++++++++
 drivers/soc/amlogic/meson-canvas.c            | 14 +++++++++++-
 5 files changed, 74 insertions(+), 4 deletions(-)

-- 
2.21.0


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^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v2 1/5] dt-bindings: soc: amlogic: canvas: document support for Meson8/8b/8m2
  2019-05-20 19:43 [PATCH v2 0/5] 32-bit Meson: add the canvas module Martin Blumenstingl
@ 2019-05-20 19:43 ` Martin Blumenstingl
  2019-05-21 11:26   ` Maxime Jourdan
  2019-05-20 19:43 ` [PATCH v2 2/5] soc: amlogic: canvas: add support for Meson8, Meson8b and Meson8m2 Martin Blumenstingl
                   ` (4 subsequent siblings)
  5 siblings, 1 reply; 9+ messages in thread
From: Martin Blumenstingl @ 2019-05-20 19:43 UTC (permalink / raw)
  To: linux-amlogic, khilman, mjourdan, robh+dt, mark.rutland, devicetree
  Cc: Martin Blumenstingl, linux-kernel, linux-arm-kernel

The canvas IP on Meson8, Meson8b and Meson8m2 is similar to the one
found on GXBB and newer. The only known difference is that the older
SoCs cannot configure the "endianness".

Add a compatible string for each of the older SoCs to make sure we won't
be using unsupported features on these SoCs.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 .../devicetree/bindings/soc/amlogic/amlogic,canvas.txt | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/soc/amlogic/amlogic,canvas.txt b/Documentation/devicetree/bindings/soc/amlogic/amlogic,canvas.txt
index 436d2106e80d..e876f3ce54f6 100644
--- a/Documentation/devicetree/bindings/soc/amlogic/amlogic,canvas.txt
+++ b/Documentation/devicetree/bindings/soc/amlogic/amlogic,canvas.txt
@@ -2,8 +2,8 @@ Amlogic Canvas
 ================================
 
 A canvas is a collection of metadata that describes a pixel buffer.
-Those metadata include: width, height, phyaddr, wrapping, block mode
-and endianness.
+Those metadata include: width, height, phyaddr, wrapping and block mode.
+Starting with GXBB the endianness can also be described.
 
 Many IPs within Amlogic SoCs rely on canvas indexes to read/write pixel data
 rather than use the phy addresses directly. For instance, this is the case for
@@ -18,7 +18,11 @@ Video Lookup Table
 --------------------------
 
 Required properties:
-- compatible: "amlogic,canvas"
+- compatible: has to be one of:
+		- "amlogic,meson8-canvas", "amlogic,canvas" on Meson8
+		- "amlogic,meson8b-canvas", "amlogic,canvas" on Meson8b
+		- "amlogic,meson8m2-canvas", "amlogic,canvas" on Meson8m2
+		- "amlogic,canvas" on GXBB and newer
 - reg: Base physical address and size of the canvas registers.
 
 Example:
-- 
2.21.0


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^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v2 2/5] soc: amlogic: canvas: add support for Meson8, Meson8b and Meson8m2
  2019-05-20 19:43 [PATCH v2 0/5] 32-bit Meson: add the canvas module Martin Blumenstingl
  2019-05-20 19:43 ` [PATCH v2 1/5] dt-bindings: soc: amlogic: canvas: document support for Meson8/8b/8m2 Martin Blumenstingl
@ 2019-05-20 19:43 ` Martin Blumenstingl
  2019-05-21  8:07   ` Maxime Jourdan
  2019-05-20 19:43 ` [PATCH v2 3/5] ARM: dts: meson8: add the canvas module Martin Blumenstingl
                   ` (3 subsequent siblings)
  5 siblings, 1 reply; 9+ messages in thread
From: Martin Blumenstingl @ 2019-05-20 19:43 UTC (permalink / raw)
  To: linux-amlogic, khilman, mjourdan, robh+dt, mark.rutland, devicetree
  Cc: Martin Blumenstingl, linux-kernel, linux-arm-kernel

The canvas IP on Meson8, Meson8b and Meson8m2 is mostly identical to the
one on GXBB and newer. The only known difference so far is that that the
"endianness" bits are not supported on Meson8m2 and earlier.

Add new compatible strings and a check in meson_canvas_config() to
validate that the endianness bits cannot be configured on the 32-bit
SoCs.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 drivers/soc/amlogic/meson-canvas.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/soc/amlogic/meson-canvas.c b/drivers/soc/amlogic/meson-canvas.c
index be95a37c3fec..c655f5f92b12 100644
--- a/drivers/soc/amlogic/meson-canvas.c
+++ b/drivers/soc/amlogic/meson-canvas.c
@@ -35,6 +35,7 @@ struct meson_canvas {
 	void __iomem *reg_base;
 	spinlock_t lock; /* canvas device lock */
 	u8 used[NUM_CANVAS];
+	bool supports_endianness;
 };
 
 static void canvas_write(struct meson_canvas *canvas, u32 reg, u32 val)
@@ -86,6 +87,12 @@ int meson_canvas_config(struct meson_canvas *canvas, u8 canvas_index,
 {
 	unsigned long flags;
 
+	if (endian && !canvas->supports_endianness) {
+		dev_err(canvas->dev,
+			"Endianness is not supported on this SoC\n");
+		return -EINVAL;
+	}
+
 	spin_lock_irqsave(&canvas->lock, flags);
 	if (!canvas->used[canvas_index]) {
 		dev_err(canvas->dev,
@@ -172,6 +179,8 @@ static int meson_canvas_probe(struct platform_device *pdev)
 	if (IS_ERR(canvas->reg_base))
 		return PTR_ERR(canvas->reg_base);
 
+	canvas->supports_endianness = of_device_get_match_data(dev);
+
 	canvas->dev = dev;
 	spin_lock_init(&canvas->lock);
 	dev_set_drvdata(dev, canvas);
@@ -180,7 +189,10 @@ static int meson_canvas_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id canvas_dt_match[] = {
-	{ .compatible = "amlogic,canvas" },
+	{ .compatible = "amlogic,meson8-canvas", .data = (void *)false, },
+	{ .compatible = "amlogic,meson8b-canvas", .data = (void *)false, },
+	{ .compatible = "amlogic,meson8m2-canvas", .data = (void *)false, },
+	{ .compatible = "amlogic,canvas", .data = (void *)true, },
 	{}
 };
 MODULE_DEVICE_TABLE(of, canvas_dt_match);
-- 
2.21.0


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http://lists.infradead.org/mailman/listinfo/linux-amlogic

^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v2 3/5] ARM: dts: meson8: add the canvas module
  2019-05-20 19:43 [PATCH v2 0/5] 32-bit Meson: add the canvas module Martin Blumenstingl
  2019-05-20 19:43 ` [PATCH v2 1/5] dt-bindings: soc: amlogic: canvas: document support for Meson8/8b/8m2 Martin Blumenstingl
  2019-05-20 19:43 ` [PATCH v2 2/5] soc: amlogic: canvas: add support for Meson8, Meson8b and Meson8m2 Martin Blumenstingl
@ 2019-05-20 19:43 ` Martin Blumenstingl
  2019-05-20 19:43 ` [PATCH v2 4/5] ARM: dts: meson8m2: update the offset of " Martin Blumenstingl
                   ` (2 subsequent siblings)
  5 siblings, 0 replies; 9+ messages in thread
From: Martin Blumenstingl @ 2019-05-20 19:43 UTC (permalink / raw)
  To: linux-amlogic, khilman, mjourdan, robh+dt, mark.rutland, devicetree
  Cc: Martin Blumenstingl, linux-kernel, linux-arm-kernel

Add the canvas module to Meson8 because it's required for the VPU
(video output) and video decoders.

The canvas module is located inside thie "DMC bus" (where also some of
the memory controller registers are located). The "DMC bus" itself is
part of the so-called "MMC bus".

Amlogic's vendor kernel has an explicit #define for the "DMC" register
range on Meson8m2 while there's no such #define for Meson8. However, the
canvas and memory controller registers on Meson8 are all expressed as
"0x6000 + actual offset", while Meson8m2 uses "DMC + actual offset".
Thus it's safe to assume that the DMC bus exists on both SoCs even
though the registers inside are slightly different.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 arch/arm/boot/dts/meson8.dtsi | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm/boot/dts/meson8.dtsi b/arch/arm/boot/dts/meson8.dtsi
index 40c11b6b217a..6a235275b01f 100644
--- a/arch/arm/boot/dts/meson8.dtsi
+++ b/arch/arm/boot/dts/meson8.dtsi
@@ -228,6 +228,28 @@
 		};
 	};
 
+	mmcbus: bus@c8000000 {
+		compatible = "simple-bus";
+		reg = <0xc8000000 0x8000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0xc8000000 0x8000>;
+
+		dmcbus: bus@6000 {
+			compatible = "simple-bus";
+			reg = <0x6000 0x400>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0x0 0x6000 0x400>;
+
+			canvas: video-lut@20 {
+				compatible = "amlogic,meson8-canvas",
+					     "amlogic,canvas";
+				reg = <0x20 0x14>;
+			};
+		};
+	};
+
 	apb: bus@d0000000 {
 		compatible = "simple-bus";
 		reg = <0xd0000000 0x200000>;
-- 
2.21.0


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http://lists.infradead.org/mailman/listinfo/linux-amlogic

^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v2 4/5] ARM: dts: meson8m2: update the offset of the canvas module
  2019-05-20 19:43 [PATCH v2 0/5] 32-bit Meson: add the canvas module Martin Blumenstingl
                   ` (2 preceding siblings ...)
  2019-05-20 19:43 ` [PATCH v2 3/5] ARM: dts: meson8: add the canvas module Martin Blumenstingl
@ 2019-05-20 19:43 ` " Martin Blumenstingl
  2019-05-20 19:43 ` [PATCH v2 5/5] ARM: dts: meson8b: add " Martin Blumenstingl
  2019-05-23  1:21 ` [PATCH v2 0/5] 32-bit Meson: " Kevin Hilman
  5 siblings, 0 replies; 9+ messages in thread
From: Martin Blumenstingl @ 2019-05-20 19:43 UTC (permalink / raw)
  To: linux-amlogic, khilman, mjourdan, robh+dt, mark.rutland, devicetree
  Cc: Martin Blumenstingl, linux-kernel, linux-arm-kernel

With the Meson8m2 SoC the canvas module was moved from offset 0x20
(Meson8) to offset 0x48 (same as on Meson8b). The offsets inside the
canvas module are identical.

Correct the offset so the driver uses the correct registers.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 arch/arm/boot/dts/meson8m2.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/meson8m2.dtsi b/arch/arm/boot/dts/meson8m2.dtsi
index bb87b251e16d..5bde7f502007 100644
--- a/arch/arm/boot/dts/meson8m2.dtsi
+++ b/arch/arm/boot/dts/meson8m2.dtsi
@@ -14,6 +14,16 @@
 	compatible = "amlogic,meson8m2-clkc", "amlogic,meson8-clkc";
 };
 
+&dmcbus {
+	/* the offset of the canvas registers has changed compared to Meson8 */
+	/delete-node/ video-lut@20;
+
+	canvas: video-lut@48 {
+		compatible = "amlogic,meson8m2-canvas", "amlogic,canvas";
+		reg = <0x48 0x14>;
+	};
+};
+
 &ethmac {
 	compatible = "amlogic,meson8m2-dwmac", "snps,dwmac";
 	reg = <0xc9410000 0x10000
-- 
2.21.0


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^ permalink raw reply	[flat|nested] 9+ messages in thread

* [PATCH v2 5/5] ARM: dts: meson8b: add the canvas module
  2019-05-20 19:43 [PATCH v2 0/5] 32-bit Meson: add the canvas module Martin Blumenstingl
                   ` (3 preceding siblings ...)
  2019-05-20 19:43 ` [PATCH v2 4/5] ARM: dts: meson8m2: update the offset of " Martin Blumenstingl
@ 2019-05-20 19:43 ` " Martin Blumenstingl
  2019-05-23  1:21 ` [PATCH v2 0/5] 32-bit Meson: " Kevin Hilman
  5 siblings, 0 replies; 9+ messages in thread
From: Martin Blumenstingl @ 2019-05-20 19:43 UTC (permalink / raw)
  To: linux-amlogic, khilman, mjourdan, robh+dt, mark.rutland, devicetree
  Cc: Martin Blumenstingl, linux-kernel, linux-arm-kernel

Add the canvas module to Meson8b because it's required for the VPU
(video output) and video decoders.

The canvas module is located inside the "DMC bus" (where also some of
the memory controller registers are located). The "DMC bus" itself is
part of the so-called "MMC bus".

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
 arch/arm/boot/dts/meson8b.dtsi | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/arch/arm/boot/dts/meson8b.dtsi b/arch/arm/boot/dts/meson8b.dtsi
index ec67f49116d9..e4134c63a48c 100644
--- a/arch/arm/boot/dts/meson8b.dtsi
+++ b/arch/arm/boot/dts/meson8b.dtsi
@@ -205,6 +205,28 @@
 		};
 	};
 
+	mmcbus: bus@c8000000 {
+		compatible = "simple-bus";
+		reg = <0xc8000000 0x8000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0xc8000000 0x8000>;
+
+		dmcbus: bus@6000 {
+			compatible = "simple-bus";
+			reg = <0x6000 0x400>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0x0 0x6000 0x400>;
+
+			canvas: video-lut@48 {
+				compatible = "amlogic,meson8b-canvas",
+					     "amlogic,canvas";
+				reg = <0x48 0x14>;
+			};
+		};
+	};
+
 	apb: bus@d0000000 {
 		compatible = "simple-bus";
 		reg = <0xd0000000 0x200000>;
-- 
2.21.0


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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH v2 2/5] soc: amlogic: canvas: add support for Meson8, Meson8b and Meson8m2
  2019-05-20 19:43 ` [PATCH v2 2/5] soc: amlogic: canvas: add support for Meson8, Meson8b and Meson8m2 Martin Blumenstingl
@ 2019-05-21  8:07   ` Maxime Jourdan
  0 siblings, 0 replies; 9+ messages in thread
From: Maxime Jourdan @ 2019-05-21  8:07 UTC (permalink / raw)
  To: Martin Blumenstingl
  Cc: mark.rutland, devicetree, Kevin Hilman, linux-kernel,
	Rob Herring, linux-amlogic, linux-arm-kernel

On Mon, May 20, 2019 at 9:44 PM Martin Blumenstingl
<martin.blumenstingl@googlemail.com> wrote:
>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Maxime Jourdan <mjourdan@baylibre.com>

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH v2 1/5] dt-bindings: soc: amlogic: canvas: document support for Meson8/8b/8m2
  2019-05-20 19:43 ` [PATCH v2 1/5] dt-bindings: soc: amlogic: canvas: document support for Meson8/8b/8m2 Martin Blumenstingl
@ 2019-05-21 11:26   ` Maxime Jourdan
  0 siblings, 0 replies; 9+ messages in thread
From: Maxime Jourdan @ 2019-05-21 11:26 UTC (permalink / raw)
  To: Martin Blumenstingl, linux-amlogic, khilman, robh+dt,
	mark.rutland, devicetree
  Cc: linux-kernel, linux-arm-kernel



On 20/05/2019 21:43, Martin Blumenstingl wrote:
> 
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Maxime Jourdan <mjourdan@baylibre.com>

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^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: [PATCH v2 0/5] 32-bit Meson: add the canvas module
  2019-05-20 19:43 [PATCH v2 0/5] 32-bit Meson: add the canvas module Martin Blumenstingl
                   ` (4 preceding siblings ...)
  2019-05-20 19:43 ` [PATCH v2 5/5] ARM: dts: meson8b: add " Martin Blumenstingl
@ 2019-05-23  1:21 ` " Kevin Hilman
  5 siblings, 0 replies; 9+ messages in thread
From: Kevin Hilman @ 2019-05-23  1:21 UTC (permalink / raw)
  To: Martin Blumenstingl, linux-amlogic, mjourdan, robh+dt,
	mark.rutland, devicetree
  Cc: Martin Blumenstingl, linux-kernel, linux-arm-kernel

Martin Blumenstingl <martin.blumenstingl@googlemail.com> writes:

> This adds the canvas module on Meson8, Meson8b and Meson8m2. The canvas
> IP is used by the video decoder hardware as well as the VPU (video
> output) hardware.
>
> Neither the VPU nor the video decoder driver support the 32-bit SoCs
> yet. However, we can still add the canvas module to have it available
> once these drivers gain support for the older SoCs.
>
> I have tested this on my Meson8m2 board by hacking the VPU driver to
> not re-initialize the VPU (and to use the configuration set by u-boot).
> With that hack I could get some image out of the CVBS connector. No
> changes to the canvas driver were required.
>
> Due to lack of hardware I could not test Meson8, but I'm following (as
> always) what the Amlogic 3.10 vendor kernel uses.
> Meson8b is also not tested because u-boot of my EC-100 doesn't have
> video output enabled (so I couldn't use the same hack I used on my
> Meson8m2 board).

Queued for v5.3...

> Martin Blumenstingl (5):
>   dt-bindings: soc: amlogic: canvas: document support for Meson8/8b/8m2
>   soc: amlogic: canvas: add support for Meson8, Meson8b and Meson8m2

these two in v5.3/drivers

>   ARM: dts: meson8: add the canvas module
>   ARM: dts: meson8m2: update the offset of the canvas module
>   ARM: dts: meson8b: add the canvas module

and these 3 in v5.3/dt.

Thanks,

Kevin



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^ permalink raw reply	[flat|nested] 9+ messages in thread

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Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-05-20 19:43 [PATCH v2 0/5] 32-bit Meson: add the canvas module Martin Blumenstingl
2019-05-20 19:43 ` [PATCH v2 1/5] dt-bindings: soc: amlogic: canvas: document support for Meson8/8b/8m2 Martin Blumenstingl
2019-05-21 11:26   ` Maxime Jourdan
2019-05-20 19:43 ` [PATCH v2 2/5] soc: amlogic: canvas: add support for Meson8, Meson8b and Meson8m2 Martin Blumenstingl
2019-05-21  8:07   ` Maxime Jourdan
2019-05-20 19:43 ` [PATCH v2 3/5] ARM: dts: meson8: add the canvas module Martin Blumenstingl
2019-05-20 19:43 ` [PATCH v2 4/5] ARM: dts: meson8m2: update the offset of " Martin Blumenstingl
2019-05-20 19:43 ` [PATCH v2 5/5] ARM: dts: meson8b: add " Martin Blumenstingl
2019-05-23  1:21 ` [PATCH v2 0/5] 32-bit Meson: " Kevin Hilman

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