[2/2] ARM: dts: Modernize the Vexpress PL111 integration

Message ID 20180427195411.19610-1-linus.walleij@linaro.org
State New
Headers show
Series
  • Untitled series #11064
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Commit Message

Linus Walleij April 27, 2018, 7:54 p.m.
The Versatile Express was submitted with the actual display
bridges unconnected (but defined in the device tree) and
mock "panels" encoded in the device tree node of the PL111
controller.

This doesn't even remotely describe the actual Versatile
Express hardware. Exploit the SiI9022 bridge by connecting
the PL111 pads to it, making it use EDID or fallback values
to drive the monitor.

The  also has to use the reserved memory through the
CMA pool rather than by open coding a memory region and
remapping it explicitly in the driver. To achieve this,
a reserved-memory node must exist in the root of the
device tree, so we need to pull that out of the
motherboard .dtsi include files, and push it into each
top-level device tree instead.

We do the same manouver for all the Versatile Express
boards, taking into account the different location of the
video RAM depending on which chip select is used on
each platform.

This plays nicely with the new PL111 DRM driver and
follows the standard ways of assigning bridges and
memory pools for graphics.

Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Mali DP Maintainers <malidp@foss.arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
 arch/arm/boot/dts/vexpress-v2m-rs1.dtsi          | 51 +++++++++--------------
 arch/arm/boot/dts/vexpress-v2m.dtsi              | 52 ++++++++++--------------
 arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts      | 14 +++++++
 arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts       | 14 +++++++
 arch/arm/boot/dts/vexpress-v2p-ca5s.dts          | 14 +++++++
 arch/arm/boot/dts/vexpress-v2p-ca9.dts           | 41 ++++++++-----------
 arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts       | 14 +++++++
 arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi | 37 +++--------------
 8 files changed, 119 insertions(+), 118 deletions(-)

Comments

Robin Murphy April 30, 2018, 3:25 p.m. | #1
On 27/04/18 20:54, Linus Walleij wrote:
> The Versatile Express was submitted with the actual display
> bridges unconnected (but defined in the device tree) and
> mock "panels" encoded in the device tree node of the PL111
> controller.
> 
> This doesn't even remotely describe the actual Versatile
> Express hardware. Exploit the SiI9022 bridge by connecting
> the PL111 pads to it, making it use EDID or fallback values
> to drive the monitor.
> 
> The  also has to use the reserved memory through the
> CMA pool rather than by open coding a memory region and
> remapping it explicitly in the driver. To achieve this,
> a reserved-memory node must exist in the root of the
> device tree, so we need to pull that out of the
> motherboard .dtsi include files, and push it into each
> top-level device tree instead.
> 
> We do the same manouver for all the Versatile Express
> boards, taking into account the different location of the
> video RAM depending on which chip select is used on
> each platform.
> 
> This plays nicely with the new PL111 DRM driver and
> follows the standard ways of assigning bridges and
> memory pools for graphics.
> 
> Cc: Liviu Dudau <liviu.dudau@arm.com>
> Cc: Mali DP Maintainers <malidp@foss.arm.com>
> Cc: Robin Murphy <robin.murphy@arm.com>
> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
> ---
>   arch/arm/boot/dts/vexpress-v2m-rs1.dtsi          | 51 +++++++++--------------
>   arch/arm/boot/dts/vexpress-v2m.dtsi              | 52 ++++++++++--------------
>   arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts      | 14 +++++++
>   arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts       | 14 +++++++
>   arch/arm/boot/dts/vexpress-v2p-ca5s.dts          | 14 +++++++
>   arch/arm/boot/dts/vexpress-v2p-ca9.dts           | 41 ++++++++-----------
>   arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts       | 14 +++++++
>   arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi | 37 +++--------------
>   8 files changed, 119 insertions(+), 118 deletions(-)
> 
> diff --git a/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi b/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
> index 7b8ff5b3b912..51517c832b9b 100644
> --- a/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
> +++ b/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
> @@ -43,11 +43,6 @@
>   				bank-width = <4>;
>   			};
>   
> -			v2m_video_ram: vram@2,00000000 {
> -				compatible = "arm,vexpress-vram";
> -				reg = <2 0x00000000 0x00800000>;
> -			};
> -
>   			ethernet@2,02000000 {
>   				compatible = "smsc,lan9118", "smsc,lan9115";
>   				reg = <2 0x02000000 0x10000>;
> @@ -224,6 +219,21 @@
>   					dvi-transmitter@39 {
>   						compatible = "sil,sii9022-tpi", "sil,sii9022";
>   						reg = <0x39>;
> +						#address-cells = <1>;
> +						#size-cells = <0>;

These aren't used, since the ports node has no "reg" property to decode.

> +
> +						ports {
> +							#address-cells = <1>;
> +							#size-cells = <0>;
> +
> +							port@0 {
> +								reg = <0>;

Similarly, if this "reg" is only there to satisfy the unit address the 
whole business could just be elided at this level too - I don't think 
it's particularly meaningful if the SiI9022 doesn't have multiple 
addressable inputs itself.

> +
> +								dvi_bridge_in: endpoint {
> +									remote-endpoint = <&clcd_pads>;
> +								};
> +							};
> +						};
>   					};
>   
>   					dvi-transmitter@60 {
> @@ -254,37 +264,16 @@
>   					interrupts = <14>;
>   					clocks = <&v2m_oscclk1>, <&smbclk>;
>   					clock-names = "clcdclk", "apb_pclk";
> -					memory-region = <&v2m_video_ram>;
> -					max-memory-bandwidth = <50350000>; /* 16bpp @ 25.175MHz */
> +					/* 800x600 16bpp @36MHz works fine */
> +					max-memory-bandwidth = <54000000>;
> +					memory-region = <&vram>;
>   
>   					port {
> -						v2m_clcd_pads: endpoint {
> -							remote-endpoint = <&v2m_clcd_panel>;
> +						clcd_pads: endpoint {
> +							remote-endpoint = <&dvi_bridge_in>;
>   							arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
>   						};
>   					};
> -
> -					panel {
> -						compatible = "panel-dpi";
> -
> -						port {
> -							v2m_clcd_panel: endpoint {
> -								remote-endpoint = <&v2m_clcd_pads>;
> -							};
> -						};
> -
> -						panel-timing {
> -							clock-frequency = <25175000>;
> -							hactive = <640>;
> -							hback-porch = <40>;
> -							hfront-porch = <24>;
> -							hsync-len = <96>;
> -							vactive = <480>;
> -							vback-porch = <32>;
> -							vfront-porch = <11>;
> -							vsync-len = <2>;
> -						};
> -					};
>   				};
>   			};
>   
> diff --git a/arch/arm/boot/dts/vexpress-v2m.dtsi b/arch/arm/boot/dts/vexpress-v2m.dtsi
> index 9cd5e146abd5..39e2b1b648b2 100644
> --- a/arch/arm/boot/dts/vexpress-v2m.dtsi
> +++ b/arch/arm/boot/dts/vexpress-v2m.dtsi
> @@ -43,11 +43,6 @@
>   				bank-width = <4>;
>   			};
>   
> -			v2m_video_ram: vram@3,00000000 {
> -				compatible = "arm,vexpress-vram";
> -				reg = <3 0x00000000 0x00800000>;
> -			};
> -
>   			ethernet@3,02000000 {
>   				compatible = "smsc,lan9118", "smsc,lan9115";
>   				reg = <3 0x02000000 0x10000>;
> @@ -224,6 +219,21 @@
>   					dvi-transmitter@39 {
>   						compatible = "sil,sii9022-tpi", "sil,sii9022";
>   						reg = <0x39>;
> +						#address-cells = <1>;
> +						#size-cells = <0>;
> +
> +						ports {
> +							#address-cells = <1>;
> +							#size-cells = <0>;
> +
> +							port@0 {
> +								reg = <0>;
> +
> +								dvi_bridge_in: endpoint {
> +									remote-endpoint = <&clcd_pads>;
> +								};
> +							};
> +						};
>   					};
>   
>   					dvi-transmitter@60 {
> @@ -247,6 +257,7 @@
>   					reg-shift = <2>;
>   				};
>   
> +
>   				clcd@1f000 {
>   					compatible = "arm,pl111", "arm,primecell";
>   					reg = <0x1f000 0x1000>;
> @@ -254,37 +265,16 @@
>   					interrupts = <14>;
>   					clocks = <&v2m_oscclk1>, <&smbclk>;
>   					clock-names = "clcdclk", "apb_pclk";
> -					memory-region = <&v2m_video_ram>;
> -					max-memory-bandwidth = <50350000>; /* 16bpp @ 25.175MHz */
> +					/* 800x600 16bpp @36MHz works fine */
> +					max-memory-bandwidth = <54000000>;
> +					memory-region = <&vram>;
>   
>   					port {
> -						v2m_clcd_pads: endpoint {
> -							remote-endpoint = <&v2m_clcd_panel>;
> +						clcd_pads_mb: endpoint {
> +							remote-endpoint = <&dvi_bridge_in>;
>   							arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
>   						};
>   					};
> -
> -					panel {
> -						compatible = "panel-dpi";
> -
> -						port {
> -							v2m_clcd_panel: endpoint {
> -								remote-endpoint = <&v2m_clcd_pads>;
> -							};
> -						};
> -
> -						panel-timing {
> -							clock-frequency = <25175000>;
> -							hactive = <640>;
> -							hback-porch = <40>;
> -							hfront-porch = <24>;
> -							hsync-len = <96>;
> -							vactive = <480>;
> -							vback-porch = <32>;
> -							vfront-porch = <11>;
> -							vsync-len = <2>;
> -						};
> -					};
>   				};
>   			};
>   
> diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
> index 3971427a105b..62f2a7ff356a 100644
> --- a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
> +++ b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
> @@ -53,6 +53,20 @@
>   		reg = <0 0x80000000 0 0x40000000>;
>   	};
>   
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		/* Chipselect 2 is physically at 0x48000000 */
> +		vram: vram@48000000 {
> +			/* 8 MB of designated video RAM */
> +			compatible = "shared-dma-pool";
> +			reg = <0 0x48000000 0 0x00800000>;
> +			no-map;
> +		};
> +	};
> +
>   	hdlcd@2b000000 {
>   		compatible = "arm,hdlcd";
>   		reg = <0 0x2b000000 0 0x1000>;
> diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
> index 65a874ea66be..3ae06f406c9a 100644
> --- a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
> +++ b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
> @@ -104,6 +104,20 @@
>   		reg = <0 0x80000000 0 0x40000000>;
>   	};
>   
> +	reserved-memory {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		/* Chipselect 2 is physically at 0x48000000 */

That should be 0x18000000 - the only thing to be found at 0x48000000 is 
an imprecise external abort ;)

(I guess that might apply to the other RS1 tiles too).

Robin.

> +		vram: vram@48000000 {
> +			/* 8 MB of designated video RAM */
> +			compatible = "shared-dma-pool";
> +			reg = <0 0x48000000 0 0x00800000>;
> +			no-map;
> +		};
> +	};
> +
>   	wdt@2a490000 {
>   		compatible = "arm,sp805", "arm,primecell";
>   		reg = <0 0x2a490000 0 0x1000>;
> diff --git a/arch/arm/boot/dts/vexpress-v2p-ca5s.dts b/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
> index e5b4a7570a01..a79185ecc059 100644
> --- a/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
> +++ b/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
> @@ -55,6 +55,20 @@
>   		reg = <0x80000000 0x40000000>;
>   	};
>   
> +	reserved-memory {
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges;
> +
> +		/* Chipselect 2 is physically at 0x48000000 */
> +		vram: vram@48000000 {
> +			/* 8 MB of designated video RAM */
> +			compatible = "shared-dma-pool";
> +			reg = <0x48000000 0x00800000>;
> +			no-map;
> +		};
> +	};
> +
>   	hdlcd@2a110000 {
>   		compatible = "arm,hdlcd";
>   		reg = <0x2a110000 0x1000>;
> diff --git a/arch/arm/boot/dts/vexpress-v2p-ca9.dts b/arch/arm/boot/dts/vexpress-v2p-ca9.dts
> index 7ec3dac1f61d..7252bcce2086 100644
> --- a/arch/arm/boot/dts/vexpress-v2p-ca9.dts
> +++ b/arch/arm/boot/dts/vexpress-v2p-ca9.dts
> @@ -69,6 +69,20 @@
>   		reg = <0x60000000 0x40000000>;
>   	};
>   
> +	reserved-memory {
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges;
> +
> +		/* Chipselect 3 is physically at 0x4c000000 */
> +		vram: vram@4c000000 {
> +			/* 8 MB of designated video RAM */
> +			compatible = "shared-dma-pool";
> +			reg = <0x4c000000 0x00800000>;
> +			no-map;
> +		};
> +	};
> +
>   	clcd@10020000 {
>   		compatible = "arm,pl111", "arm,primecell";
>   		reg = <0x10020000 0x1000>;
> @@ -76,36 +90,15 @@
>   		interrupts = <0 44 4>;
>   		clocks = <&oscclk1>, <&oscclk2>;
>   		clock-names = "clcdclk", "apb_pclk";
> -		max-memory-bandwidth = <130000000>; /* 16bpp @ 63.5MHz */
> +		/* 1024x768 16bpp @65MHz */
> +		max-memory-bandwidth = <95000000>;
>   
>   		port {
>   			clcd_pads: endpoint {
> -				remote-endpoint = <&clcd_panel>;
> +				remote-endpoint = <&dvi_bridge_in>;
>   				arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
>   			};
>   		};
> -
> -		panel {
> -			compatible = "panel-dpi";
> -
> -			port {
> -				clcd_panel: endpoint {
> -					remote-endpoint = <&clcd_pads>;
> -				};
> -			};
> -
> -			panel-timing {
> -				clock-frequency = <63500127>;
> -				hactive = <1024>;
> -				hback-porch = <152>;
> -				hfront-porch = <48>;
> -				hsync-len = <104>;
> -				vactive = <768>;
> -				vback-porch = <23>;
> -				vfront-porch = <3>;
> -				vsync-len = <4>;
> -			};
> -		};
>   	};
>   
>   	memory-controller@100e0000 {
> diff --git a/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts b/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
> index 06c8117e812a..e9423a099573 100644
> --- a/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
> +++ b/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
> @@ -76,6 +76,20 @@
>   		      <0x00000008 0x80000000 0 0x80000000>;
>   	};
>   
> +	reserved-memory {
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges;
> +
> +		/* Chipselect 2 is physically at 0x48000000 */
> +		vram: vram@48000000 {
> +			/* 8 MB of designated video RAM */
> +			compatible = "shared-dma-pool";
> +			reg = <0x48000000 0x00800000>;
> +			no-map;
> +		};
> +	};
> +
>   	gic: interrupt-controller@2c001000 {
>   		compatible = "arm,cortex-a15-gic", "arm,cortex-a9-gic";
>   		#interrupt-cells = <3>;
> diff --git a/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi b/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi
> index 1134e5d8df18..737d0a0c0854 100644
> --- a/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi
> +++ b/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi
> @@ -23,11 +23,6 @@
>   			bank-width = <4>;
>   		};
>   
> -		v2m_video_ram: vram@2,00000000 {
> -			compatible = "arm,vexpress-vram";
> -			reg = <2 0x00000000 0x00800000>;
> -		};
> -
>   		ethernet@2,02000000 {
>   			compatible = "smsc,lan91c111";
>   			reg = <2 0x02000000 0x10000>;
> @@ -186,38 +181,16 @@
>   				interrupts = <14>;
>   				clocks = <&v2m_oscclk1>, <&v2m_clk24mhz>;
>   				clock-names = "clcdclk", "apb_pclk";
> -				arm,pl11x,framebuffer = <0x18000000 0x00180000>;
> -				memory-region = <&v2m_video_ram>;
> -				max-memory-bandwidth = <130000000>; /* 16bpp @ 63.5MHz */
> +				/* 800x600 16bpp @36MHz works fine */
> +				max-memory-bandwidth = <54000000>;
> +				memory-region = <&vram>;
>   
>   				port {
> -					v2m_clcd_pads: endpoint {
> -						remote-endpoint = <&v2m_clcd_panel>;
> +					clcd_pads: endpoint {
> +						remote-endpoint = <&dvi_bridge_in>;
>   						arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
>   					};
>   				};
> -
> -				panel {
> -					compatible = "panel-dpi";
> -
> -					port {
> -						v2m_clcd_panel: endpoint {
> -							remote-endpoint = <&v2m_clcd_pads>;
> -						};
> -					};
> -
> -					panel-timing {
> -						clock-frequency = <63500127>;
> -						hactive = <1024>;
> -						hback-porch = <152>;
> -						hfront-porch = <48>;
> -						hsync-len = <104>;
> -						vactive = <768>;
> -						vback-porch = <23>;
> -						vfront-porch = <3>;
> -						vsync-len = <4>;
> -					};
> -				};
>   			};
>   
>   			virtio-block@130000 {
>

Patch

diff --git a/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi b/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
index 7b8ff5b3b912..51517c832b9b 100644
--- a/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
+++ b/arch/arm/boot/dts/vexpress-v2m-rs1.dtsi
@@ -43,11 +43,6 @@ 
 				bank-width = <4>;
 			};
 
-			v2m_video_ram: vram@2,00000000 {
-				compatible = "arm,vexpress-vram";
-				reg = <2 0x00000000 0x00800000>;
-			};
-
 			ethernet@2,02000000 {
 				compatible = "smsc,lan9118", "smsc,lan9115";
 				reg = <2 0x02000000 0x10000>;
@@ -224,6 +219,21 @@ 
 					dvi-transmitter@39 {
 						compatible = "sil,sii9022-tpi", "sil,sii9022";
 						reg = <0x39>;
+						#address-cells = <1>;
+						#size-cells = <0>;
+
+						ports {
+							#address-cells = <1>;
+							#size-cells = <0>;
+
+							port@0 {
+								reg = <0>;
+
+								dvi_bridge_in: endpoint {
+									remote-endpoint = <&clcd_pads>;
+								};
+							};
+						};
 					};
 
 					dvi-transmitter@60 {
@@ -254,37 +264,16 @@ 
 					interrupts = <14>;
 					clocks = <&v2m_oscclk1>, <&smbclk>;
 					clock-names = "clcdclk", "apb_pclk";
-					memory-region = <&v2m_video_ram>;
-					max-memory-bandwidth = <50350000>; /* 16bpp @ 25.175MHz */
+					/* 800x600 16bpp @36MHz works fine */
+					max-memory-bandwidth = <54000000>;
+					memory-region = <&vram>;
 
 					port {
-						v2m_clcd_pads: endpoint {
-							remote-endpoint = <&v2m_clcd_panel>;
+						clcd_pads: endpoint {
+							remote-endpoint = <&dvi_bridge_in>;
 							arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
 						};
 					};
-
-					panel {
-						compatible = "panel-dpi";
-
-						port {
-							v2m_clcd_panel: endpoint {
-								remote-endpoint = <&v2m_clcd_pads>;
-							};
-						};
-
-						panel-timing {
-							clock-frequency = <25175000>;
-							hactive = <640>;
-							hback-porch = <40>;
-							hfront-porch = <24>;
-							hsync-len = <96>;
-							vactive = <480>;
-							vback-porch = <32>;
-							vfront-porch = <11>;
-							vsync-len = <2>;
-						};
-					};
 				};
 			};
 
diff --git a/arch/arm/boot/dts/vexpress-v2m.dtsi b/arch/arm/boot/dts/vexpress-v2m.dtsi
index 9cd5e146abd5..39e2b1b648b2 100644
--- a/arch/arm/boot/dts/vexpress-v2m.dtsi
+++ b/arch/arm/boot/dts/vexpress-v2m.dtsi
@@ -43,11 +43,6 @@ 
 				bank-width = <4>;
 			};
 
-			v2m_video_ram: vram@3,00000000 {
-				compatible = "arm,vexpress-vram";
-				reg = <3 0x00000000 0x00800000>;
-			};
-
 			ethernet@3,02000000 {
 				compatible = "smsc,lan9118", "smsc,lan9115";
 				reg = <3 0x02000000 0x10000>;
@@ -224,6 +219,21 @@ 
 					dvi-transmitter@39 {
 						compatible = "sil,sii9022-tpi", "sil,sii9022";
 						reg = <0x39>;
+						#address-cells = <1>;
+						#size-cells = <0>;
+
+						ports {
+							#address-cells = <1>;
+							#size-cells = <0>;
+
+							port@0 {
+								reg = <0>;
+
+								dvi_bridge_in: endpoint {
+									remote-endpoint = <&clcd_pads>;
+								};
+							};
+						};
 					};
 
 					dvi-transmitter@60 {
@@ -247,6 +257,7 @@ 
 					reg-shift = <2>;
 				};
 
+
 				clcd@1f000 {
 					compatible = "arm,pl111", "arm,primecell";
 					reg = <0x1f000 0x1000>;
@@ -254,37 +265,16 @@ 
 					interrupts = <14>;
 					clocks = <&v2m_oscclk1>, <&smbclk>;
 					clock-names = "clcdclk", "apb_pclk";
-					memory-region = <&v2m_video_ram>;
-					max-memory-bandwidth = <50350000>; /* 16bpp @ 25.175MHz */
+					/* 800x600 16bpp @36MHz works fine */
+					max-memory-bandwidth = <54000000>;
+					memory-region = <&vram>;
 
 					port {
-						v2m_clcd_pads: endpoint {
-							remote-endpoint = <&v2m_clcd_panel>;
+						clcd_pads_mb: endpoint {
+							remote-endpoint = <&dvi_bridge_in>;
 							arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
 						};
 					};
-
-					panel {
-						compatible = "panel-dpi";
-
-						port {
-							v2m_clcd_panel: endpoint {
-								remote-endpoint = <&v2m_clcd_pads>;
-							};
-						};
-
-						panel-timing {
-							clock-frequency = <25175000>;
-							hactive = <640>;
-							hback-porch = <40>;
-							hfront-porch = <24>;
-							hsync-len = <96>;
-							vactive = <480>;
-							vback-porch = <32>;
-							vfront-porch = <11>;
-							vsync-len = <2>;
-						};
-					};
 				};
 			};
 
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
index 3971427a105b..62f2a7ff356a 100644
--- a/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
+++ b/arch/arm/boot/dts/vexpress-v2p-ca15-tc1.dts
@@ -53,6 +53,20 @@ 
 		reg = <0 0x80000000 0 0x40000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		/* Chipselect 2 is physically at 0x48000000 */
+		vram: vram@48000000 {
+			/* 8 MB of designated video RAM */
+			compatible = "shared-dma-pool";
+			reg = <0 0x48000000 0 0x00800000>;
+			no-map;
+		};
+	};
+
 	hdlcd@2b000000 {
 		compatible = "arm,hdlcd";
 		reg = <0 0x2b000000 0 0x1000>;
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
index 65a874ea66be..3ae06f406c9a 100644
--- a/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
+++ b/arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts
@@ -104,6 +104,20 @@ 
 		reg = <0 0x80000000 0 0x40000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		/* Chipselect 2 is physically at 0x48000000 */
+		vram: vram@48000000 {
+			/* 8 MB of designated video RAM */
+			compatible = "shared-dma-pool";
+			reg = <0 0x48000000 0 0x00800000>;
+			no-map;
+		};
+	};
+
 	wdt@2a490000 {
 		compatible = "arm,sp805", "arm,primecell";
 		reg = <0 0x2a490000 0 0x1000>;
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca5s.dts b/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
index e5b4a7570a01..a79185ecc059 100644
--- a/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
+++ b/arch/arm/boot/dts/vexpress-v2p-ca5s.dts
@@ -55,6 +55,20 @@ 
 		reg = <0x80000000 0x40000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		/* Chipselect 2 is physically at 0x48000000 */
+		vram: vram@48000000 {
+			/* 8 MB of designated video RAM */
+			compatible = "shared-dma-pool";
+			reg = <0x48000000 0x00800000>;
+			no-map;
+		};
+	};
+
 	hdlcd@2a110000 {
 		compatible = "arm,hdlcd";
 		reg = <0x2a110000 0x1000>;
diff --git a/arch/arm/boot/dts/vexpress-v2p-ca9.dts b/arch/arm/boot/dts/vexpress-v2p-ca9.dts
index 7ec3dac1f61d..7252bcce2086 100644
--- a/arch/arm/boot/dts/vexpress-v2p-ca9.dts
+++ b/arch/arm/boot/dts/vexpress-v2p-ca9.dts
@@ -69,6 +69,20 @@ 
 		reg = <0x60000000 0x40000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		/* Chipselect 3 is physically at 0x4c000000 */
+		vram: vram@4c000000 {
+			/* 8 MB of designated video RAM */
+			compatible = "shared-dma-pool";
+			reg = <0x4c000000 0x00800000>;
+			no-map;
+		};
+	};
+
 	clcd@10020000 {
 		compatible = "arm,pl111", "arm,primecell";
 		reg = <0x10020000 0x1000>;
@@ -76,36 +90,15 @@ 
 		interrupts = <0 44 4>;
 		clocks = <&oscclk1>, <&oscclk2>;
 		clock-names = "clcdclk", "apb_pclk";
-		max-memory-bandwidth = <130000000>; /* 16bpp @ 63.5MHz */
+		/* 1024x768 16bpp @65MHz */
+		max-memory-bandwidth = <95000000>;
 
 		port {
 			clcd_pads: endpoint {
-				remote-endpoint = <&clcd_panel>;
+				remote-endpoint = <&dvi_bridge_in>;
 				arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
 			};
 		};
-
-		panel {
-			compatible = "panel-dpi";
-
-			port {
-				clcd_panel: endpoint {
-					remote-endpoint = <&clcd_pads>;
-				};
-			};
-
-			panel-timing {
-				clock-frequency = <63500127>;
-				hactive = <1024>;
-				hback-porch = <152>;
-				hfront-porch = <48>;
-				hsync-len = <104>;
-				vactive = <768>;
-				vback-porch = <23>;
-				vfront-porch = <3>;
-				vsync-len = <4>;
-			};
-		};
 	};
 
 	memory-controller@100e0000 {
diff --git a/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts b/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
index 06c8117e812a..e9423a099573 100644
--- a/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
+++ b/arch/arm64/boot/dts/arm/rtsm_ve-aemv8a.dts
@@ -76,6 +76,20 @@ 
 		      <0x00000008 0x80000000 0 0x80000000>;
 	};
 
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		/* Chipselect 2 is physically at 0x48000000 */
+		vram: vram@48000000 {
+			/* 8 MB of designated video RAM */
+			compatible = "shared-dma-pool";
+			reg = <0x48000000 0x00800000>;
+			no-map;
+		};
+	};
+
 	gic: interrupt-controller@2c001000 {
 		compatible = "arm,cortex-a15-gic", "arm,cortex-a9-gic";
 		#interrupt-cells = <3>;
diff --git a/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi b/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi
index 1134e5d8df18..737d0a0c0854 100644
--- a/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi
+++ b/arch/arm64/boot/dts/arm/rtsm_ve-motherboard.dtsi
@@ -23,11 +23,6 @@ 
 			bank-width = <4>;
 		};
 
-		v2m_video_ram: vram@2,00000000 {
-			compatible = "arm,vexpress-vram";
-			reg = <2 0x00000000 0x00800000>;
-		};
-
 		ethernet@2,02000000 {
 			compatible = "smsc,lan91c111";
 			reg = <2 0x02000000 0x10000>;
@@ -186,38 +181,16 @@ 
 				interrupts = <14>;
 				clocks = <&v2m_oscclk1>, <&v2m_clk24mhz>;
 				clock-names = "clcdclk", "apb_pclk";
-				arm,pl11x,framebuffer = <0x18000000 0x00180000>;
-				memory-region = <&v2m_video_ram>;
-				max-memory-bandwidth = <130000000>; /* 16bpp @ 63.5MHz */
+				/* 800x600 16bpp @36MHz works fine */
+				max-memory-bandwidth = <54000000>;
+				memory-region = <&vram>;
 
 				port {
-					v2m_clcd_pads: endpoint {
-						remote-endpoint = <&v2m_clcd_panel>;
+					clcd_pads: endpoint {
+						remote-endpoint = <&dvi_bridge_in>;
 						arm,pl11x,tft-r0g0b0-pads = <0 8 16>;
 					};
 				};
-
-				panel {
-					compatible = "panel-dpi";
-
-					port {
-						v2m_clcd_panel: endpoint {
-							remote-endpoint = <&v2m_clcd_pads>;
-						};
-					};
-
-					panel-timing {
-						clock-frequency = <63500127>;
-						hactive = <1024>;
-						hback-porch = <152>;
-						hfront-porch = <48>;
-						hsync-len = <104>;
-						vactive = <768>;
-						vback-porch = <23>;
-						vfront-porch = <3>;
-						vsync-len = <4>;
-					};
-				};
 			};
 
 			virtio-block@130000 {