drm/amd/display: Try RGB before YCbCr 4:4:4 in stream validationgrafted

amdgpu_dm_create_validate_stream_for_sink() walks encoding_order[] and
uses the first encoding that validates. YCbCr 4:4:4 is listed before
RGB, so an HDMI sink that advertises 4:4:4 gets YCbCr 4:4:4 whenever the
"color format" property is left at AUTO, even though RGB fits the same
link.

That contradicts the documented AUTO behaviour for HDMI in enum
drm_connector_color_format (RGB, falling back to YCbCr 4:2:0 only when
the bandwidth is not available or the mode is 4:2:0-only), which the
amdgpu implementation of the property also describes. It also leaves
the "Broadcast RGB" property without effect on such sinks, since the
quantization range it selects only applies to RGB output.

Try RGB first. The mask still holds every encoding the sink supports,
so a mode that cannot carry RGB falls back exactly as before.

For reference, v7.2 picked RGB here unless YCbCr 4:4:4 was forced
through debugfs, while earlier kernels picked YCbCr 4:4:4 for any HDMI
sink that advertised it.

Fixes: 0b0ff65d3ca1 ("drm/amd/display: Refactor stream validation")
Suggested-by: Adolfo Rodrigues <adolfotregosa@gmail.com>
Assisted-by: Claude Code:claude-fable-5-1
Signed-off-by: Adrian Betschart <adrian.betschart@cinemaone.ch>
Reviewed-by: Fangzhi Zuo <jerry.zuo@amd.com>
Tested-by: Adolfo Rodrigues <adolfotregosa@gmail.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 7de432bc753133764dc40d37f9388da56de251e7)

6 files changed, 216 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/serio/allwinner,sun4i-a10-ps2.yaml b/Documentation/devicetree/bindings/serio/allwinner,sun4i-a10-ps2.yaml
new file mode 100644
index 000000000..7fa70fd1f
--- /dev/null
+++ b/Documentation/devicetree/bindings/serio/allwinner,sun4i-a10-ps2.yaml
@@ -0,0 +1,51 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serio/allwinner,sun4i-a10-ps2.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A10 PS2 Host Controller
+
+maintainers:
+  - Chen-Yu Tsai <wens@csie.org>
+  - Maxime Ripard <mripard@kernel.org>
+
+description:
+  A20 PS2 is dual role controller (PS2 host and PS2 device). These
+  bindings for PS2 A10/A20 host controller. IBM compliant IBM PS2 and
+  AT-compatible keyboard and mouse can be connected.
+
+properties:
+  compatible:
+    const: allwinner,sun4i-a10-ps2
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/sun7i-a20-ccu.h>
+
+    ps20: ps2@1c2a000 {
+        compatible = "allwinner,sun4i-a10-ps2";
+        reg = <0x01c2a000 0x400>;
+        interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
+        clocks = <&ccu CLK_APB1_PS20>;
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/serio/altera_ps2.txt b/Documentation/devicetree/bindings/serio/altera_ps2.txt
new file mode 100644
index 000000000..520199e2e
--- /dev/null
+++ b/Documentation/devicetree/bindings/serio/altera_ps2.txt
@@ -0,0 +1,5 @@
+Altera UP PS/2 controller
+
+Required properties:
+- compatible : should be "ALTR,ps2-1.0". <DEPRECATED>
+- compatible : should be "altr,ps2-1.0".
diff --git a/Documentation/devicetree/bindings/serio/arm,pl050.yaml b/Documentation/devicetree/bindings/serio/arm,pl050.yaml
new file mode 100644
index 000000000..d80f58d15
--- /dev/null
+++ b/Documentation/devicetree/bindings/serio/arm,pl050.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serio/arm,pl050.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Arm Ltd. PrimeCell PL050 PS/2 Keyboard/Mouse Interface
+
+maintainers:
+  - Andre Przywara <andre.przywara@arm.com>
+
+description:
+  The Arm PrimeCell PS2 Keyboard/Mouse Interface (KMI) is an AMBA compliant
+  peripheral that can be used to implement a keyboard or mouse interface that
+  is IBM PS2 or AT compatible.
+
+# We need a select here so we don't match all nodes with 'arm,primecell'
+select:
+  properties:
+    compatible:
+      contains:
+        const: arm,pl050
+  required:
+    - compatible
+
+properties:
+  compatible:
+    items:
+      - const: arm,pl050
+      - const: arm,primecell
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: KMI reference clock, used to generate the bus timing
+      - description: APB register access clock
+
+  clock-names:
+    items:
+      - const: KMIREFCLK
+      - const: apb_pclk
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+
+additionalProperties: false
+
+examples:
+  - |
+    serio@70000 {
+        compatible = "arm,pl050", "arm,primecell";
+        reg = <0x070000 0x1000>;
+        interrupts = <8>;
+        clocks = <&mb_clk24mhz>, <&soc_smc50mhz>;
+        clock-names = "KMIREFCLK", "apb_pclk";
+    };
+
+...
diff --git a/Documentation/devicetree/bindings/serio/olpc,ap-sp.txt b/Documentation/devicetree/bindings/serio/olpc,ap-sp.txt
new file mode 100644
index 000000000..0e72183f5
--- /dev/null
+++ b/Documentation/devicetree/bindings/serio/olpc,ap-sp.txt
@@ -0,0 +1,13 @@
+OLPC AP-SP serio interface
+
+Required properties:
+- compatible : "olpc,ap-sp"
+- reg : base address and length of SoC's WTM registers
+- interrupts : SP-AP interrupt
+
+Example:
+	ap-sp@d4290000 {
+		compatible = "olpc,ap-sp";
+		reg = <0xd4290000 0x1000>;
+		interrupts = <40>;
+	}
diff --git a/Documentation/devicetree/bindings/serio/ps2-gpio.yaml b/Documentation/devicetree/bindings/serio/ps2-gpio.yaml
new file mode 100644
index 000000000..99848bc34
--- /dev/null
+++ b/Documentation/devicetree/bindings/serio/ps2-gpio.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/serio/ps2-gpio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: GPIO based PS/2
+
+maintainers:
+  - Danilo Krummrich <danilokrummrich@dk-develop.de>
+
+properties:
+  compatible:
+    const: ps2-gpio
+
+  data-gpios:
+    description:
+      the gpio used for the data signal - this should be flagged as
+      active high using open drain with (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)
+      from <dt-bindings/gpio/gpio.h> since the signal is open drain by
+      definition
+    maxItems: 1
+
+  clk-gpios:
+    description:
+      the gpio used for the clock signal - this should be flagged as
+      active high using open drain with (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)
+      from <dt-bindings/gpio/gpio.h> since the signal is open drain by
+      definition
+    maxItems: 1
+
+  interrupts:
+    description:
+      The given interrupt should trigger on the falling edge of the clock line.
+    maxItems: 1
+
+  write-enable:
+    type: boolean
+    description:
+      Indicates whether write function is provided to serio device. Possibly
+      providing the write function will not work, because of the tough timing
+      requirements.
+
+required:
+  - compatible
+  - data-gpios
+  - clk-gpios
+  - interrupts
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    ps2 {
+        compatible = "ps2-gpio";
+        interrupt-parent = <&gpio>;
+        interrupts = <23 IRQ_TYPE_EDGE_FALLING>;
+        data-gpios = <&gpio 24 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+        clk-gpios = <&gpio 23 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+        write-enable;
+    };
diff --git a/Documentation/devicetree/bindings/serio/snps-arc_ps2.txt b/Documentation/devicetree/bindings/serio/snps-arc_ps2.txt
new file mode 100644
index 000000000..38c2f21e8
--- /dev/null
+++ b/Documentation/devicetree/bindings/serio/snps-arc_ps2.txt
@@ -0,0 +1,16 @@
+* ARC PS/2 driver: PS/2 block used in some ARC FPGA's & nSIM OSCI model
+
+Required properties:
+- compatible		: "snps,arc_ps2"
+- reg			: offset and length (always 0x14) of registers
+- interrupts		: interrupt
+- interrupt-names	: name of interrupt, must be "arc_ps2_irq"
+
+Example:
+
+serio@c9000400 {
+	compatible = "snps,arc_ps2";
+	reg = <0xc9000400 0x14>;
+	interrupts = <13>;
+	interrupt-names = "arc_ps2_irq";
+}