From 106b4a2a78b2a2f14885604891957b84bba502db Mon Sep 17 00:00:00 2001 From: Adrian Betschart Date: Fri, 11 Sep 2026 17:13:14 +0200 Subject: drm/amd/display: Try RGB before YCbCr 4:4:4 in stream validation 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 Assisted-by: Claude Code:claude-fable-5-1 Signed-off-by: Adrian Betschart Reviewed-by: Fangzhi Zuo Tested-by: Adolfo Rodrigues Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher (cherry picked from commit 7de432bc753133764dc40d37f9388da56de251e7) --- drivers/virt/acrn/vm.c | 126 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 126 insertions(+) create mode 100644 drivers/virt/acrn/vm.c (limited to 'drivers/virt/acrn/vm.c') diff --git a/drivers/virt/acrn/vm.c b/drivers/virt/acrn/vm.c new file mode 100644 index 000000000..3753b27c5 --- /dev/null +++ b/drivers/virt/acrn/vm.c @@ -0,0 +1,126 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ACRN_HSM: Virtual Machine management + * + * Copyright (C) 2020 Intel Corporation. All rights reserved. + * + * Authors: + * Jason Chen CJ + * Yakui Zhao + */ +#include +#include +#include + +#include "acrn_drv.h" + +/* List of VMs */ +LIST_HEAD(acrn_vm_list); +/* + * acrn_vm_list is read in a worker thread which dispatch I/O requests and + * is wrote in VM creation ioctl. Use the rwlock mechanism to protect it. + */ +DEFINE_RWLOCK(acrn_vm_list_lock); + +struct acrn_vm *acrn_vm_create(struct acrn_vm *vm, + struct acrn_vm_creation *vm_param) +{ + int ret; + + ret = hcall_create_vm(virt_to_phys(vm_param)); + if (ret < 0 || vm_param->vmid == ACRN_INVALID_VMID) { + dev_err(acrn_dev.this_device, + "Failed to create VM! Error: %d\n", ret); + return NULL; + } + + mutex_init(&vm->regions_mapping_lock); + INIT_LIST_HEAD(&vm->ioreq_clients); + spin_lock_init(&vm->ioreq_clients_lock); + vm->vmid = vm_param->vmid; + vm->vcpu_num = vm_param->vcpu_num; + + if (acrn_ioreq_init(vm, vm_param->ioreq_buf) < 0) { + hcall_destroy_vm(vm_param->vmid); + vm->vmid = ACRN_INVALID_VMID; + return NULL; + } + + write_lock_bh(&acrn_vm_list_lock); + list_add(&vm->list, &acrn_vm_list); + write_unlock_bh(&acrn_vm_list_lock); + + acrn_ioeventfd_init(vm); + acrn_irqfd_init(vm); + dev_dbg(acrn_dev.this_device, "VM %u created.\n", vm->vmid); + return vm; +} + +int acrn_vm_destroy(struct acrn_vm *vm) +{ + int ret; + + if (vm->vmid == ACRN_INVALID_VMID || + test_and_set_bit(ACRN_VM_FLAG_DESTROYED, &vm->flags)) + return 0; + + ret = hcall_destroy_vm(vm->vmid); + if (ret < 0) { + dev_err(acrn_dev.this_device, + "Failed to destroy VM %u\n", vm->vmid); + clear_bit(ACRN_VM_FLAG_DESTROYED, &vm->flags); + return ret; + } + + /* Remove from global VM list */ + write_lock_bh(&acrn_vm_list_lock); + list_del_init(&vm->list); + write_unlock_bh(&acrn_vm_list_lock); + + acrn_ioeventfd_deinit(vm); + acrn_irqfd_deinit(vm); + acrn_ioreq_deinit(vm); + + if (vm->monitor_page) { + put_page(vm->monitor_page); + vm->monitor_page = NULL; + } + + acrn_vm_all_ram_unmap(vm); + + dev_dbg(acrn_dev.this_device, "VM %u destroyed.\n", vm->vmid); + vm->vmid = ACRN_INVALID_VMID; + return 0; +} + +/** + * acrn_msi_inject() - Inject a MSI interrupt into a User VM + * @vm: User VM + * @msi_addr: The MSI address + * @msi_data: The MSI data + * + * Return: 0 on success, <0 on error + */ +int acrn_msi_inject(struct acrn_vm *vm, u64 msi_addr, u64 msi_data) +{ + struct acrn_msi_entry *msi; + int ret; + + /* might be used in interrupt context, so use GFP_ATOMIC */ + msi = kzalloc_obj(*msi, GFP_ATOMIC); + if (!msi) + return -ENOMEM; + + /* + * msi_addr: addr[19:12] with dest vcpu id + * msi_data: data[7:0] with vector + */ + msi->msi_addr = msi_addr; + msi->msi_data = msi_data; + ret = hcall_inject_msi(vm->vmid, virt_to_phys(msi)); + if (ret < 0) + dev_err(acrn_dev.this_device, + "Failed to inject MSI to VM %u!\n", vm->vmid); + kfree(msi); + return ret; +} -- cgit v1.3.1