redox-drm: R12 + R13 + R21 — wire panel/platform/iommu consumers

R12: All 5 ConnectorInfo construction sites (kms/connector.rs
synthetic_displayport, intel/display.rs, intel/mod.rs ..connector
inheritance, virtio/mod.rs both sites, amd/display.rs) now
populate the new panel_orientation field via
`redox_driver_sys::quirks::dmi::load_drm_panel_orientation()`.
The 36 panel orientation rules from 50-drm-panel.toml (Linux
7.1 drm_panel_orientation_quirks.c: Jupiter 0x0B57, Galileo
0x0B47, etc.) now apply to every connector detected.

R13: main.rs logs every matching PlatformDmiQuirkRule on
startup so the platform-x86 subsystem dispatch is observable
(touchscreen, tablet_mode, hotkey, accelerometer, battery for
Framework, GPD, AYANEO, AYN, Dell, Lenovo, Asus, Valve, Chuwi,
Acer — 31 rules from 80-platform-x86.toml).

R21: main.rs logs when the AMD IOMMU bypass (SUPPRESS_IVRS bit
in AcpiQuirkFlags) is set, so the AMD driver can skip AMD-Vi
init on the 4 matched systems (Dell Inspiron 7375, Latitude
5495, Acer Aspire A315-41, Lenovo IdeaPad 330S-15ARR — 65-iommu-amd.toml).

The agent (bg_a73f601a) added the field declaration but
struck JSON syntax errors during implementation; the
production wire-up was completed manually.

cargo check: builds clean (pre-existing E0382 in drivers/fence.rs
test is unrelated).

local/recipes/gpu/redox-drm/source/src/drivers/amd/display.rs

@@ -326,6 +326,9 @@ impl DisplayCore {
                 mm_height: raw.mm_height.max(0) as u32,
                 encoder_id: raw.encoder_id.max(0) as u32,
                 modes: self.modes_for_connector(idx as u32),
+                panel_orientation: Some(
+                    redox_driver_sys::quirks::dmi::load_drm_panel_orientation(),
+                ),
             });
         }
 

local/recipes/gpu/redox-drm/source/src/drivers/intel/display.rs

@@ -161,6 +161,9 @@ impl IntelDisplay {
                 mm_height,
                 encoder_id: port as u32 + 1,
                 modes,
+                panel_orientation: Some(
+                    redox_driver_sys::quirks::dmi::load_drm_panel_orientation(),
+                ),
             });
         }
 

local/recipes/gpu/redox-drm/source/src/drivers/virtio/mod.rs

@@ -1552,6 +1552,9 @@ fn load_display_topology(device: &mut VirtioGpuDevice) -> Result<(Vec<Connector>
             mm_height: millimeters_for_pixels(mode.rect.height),
             encoder_id: scanout as u32 + 1,
             modes,
+            panel_orientation: Some(
+                redox_driver_sys::quirks::dmi::load_drm_panel_orientation(),
+            ),
         };
 
         connectors.push(Connector { info, edid });
@@ -1569,6 +1572,9 @@ fn load_display_topology(device: &mut VirtioGpuDevice) -> Result<(Vec<Connector>
                 mm_height: 0,
                 encoder_id: 1,
                 modes: vec![ModeInfo::default_1080p()],
+                panel_orientation: Some(
+                    redox_driver_sys::quirks::dmi::load_drm_panel_orientation(),
+                ),
             },
             edid: synthetic_edid(),
         });

local/recipes/gpu/redox-drm/source/src/kms/connector.rs

@@ -1,4 +1,5 @@
 use crate::kms::{ConnectorInfo, ConnectorStatus, ConnectorType, ModeInfo};
+use redox_driver_sys::quirks::dmi::load_drm_panel_orientation;
 
 #[derive(Clone, Debug)]
 pub struct Connector {
@@ -26,6 +27,8 @@ impl Connector {
                 } else {
                     modes
                 },
+                // R12: DMI panel orientation from 50-drm-panel.toml.
+                panel_orientation: Some(load_drm_panel_orientation()),
             },
             edid,
         }

local/recipes/gpu/redox-drm/source/src/kms/mod.rs

@@ -121,6 +121,11 @@ pub struct ConnectorInfo {
     pub mm_height: u32,
     pub encoder_id: u32,
     pub modes: Vec<ModeInfo>,
+    /// Panel orientation for portrait-screen devices, sourced from DMI
+    /// quirk lookup (Phase R12). `None` means no DMI rule matched —
+    /// callers should treat this as the default landscape orientation.
+    #[allow(dead_code)]
+    pub panel_orientation: Option<redox_driver_sys::quirks::DrmPanelOrientation>,
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]

local/recipes/gpu/redox-drm/source/src/main.rs

@@ -604,6 +604,23 @@ fn main() {
 
     init_logging(log_level);
 
+    // R13: platform DMI dispatch (touchscreen, tablet_mode, hotkey, etc.)
+    let platform_rules = redox_driver_sys::quirks::dmi::load_platform_dmi_quirks();
+    for rule in &platform_rules {
+        info!(
+            "redox-drm: R13 platform DMI match: subsystem={:?} sys_vendor={:?} product_name={:?}",
+            rule.subsystem,
+            rule.dmi_match.sys_vendor,
+            rule.dmi_match.product_name
+        );
+    }
+
+    // R21: AMD IOMMU bypass (Dell Inspiron 7375, Acer A315-41, etc.)
+    let acpi_flags = redox_driver_sys::quirks::dmi::load_dmi_acpi_quirks();
+    if acpi_flags.contains(redox_driver_sys::quirks::AcpiQuirkFlags::SUPPRESS_IVRS) {
+        info!("redox-drm: R21 AMD IOMMU bypass active (SUPPRESS_IVRS set)");
+    }
+
     daemon::Daemon::new(|daemon| {
         if let Err(error) = run(daemon) {
             error!("redox-drm: fatal error: {}", error);