From 04dd17822334871b23ea2862f7798fb0e0007777 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 11 May 2024 08:53:19 +0000
Subject: [PATCH] change otg to host mode
---
kernel/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowacpi.c | 65 +++++++++++++++++++++++---------
1 files changed, 47 insertions(+), 18 deletions(-)
diff --git a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowacpi.c b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowacpi.c
index 06572f8..f9c4275 100644
--- a/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowacpi.c
+++ b/kernel/drivers/gpu/drm/nouveau/nvkm/subdev/bios/shadowacpi.c
@@ -22,22 +22,39 @@
*/
#include "priv.h"
+static int
+acpi_read_bios(acpi_handle rom_handle, u8 *bios, u32 offset, u32 length)
+{
#if defined(CONFIG_ACPI) && defined(CONFIG_X86)
-int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len);
-bool nouveau_acpi_rom_supported(struct device *);
-#else
-static inline bool
-nouveau_acpi_rom_supported(struct device *dev)
-{
- return false;
-}
+ acpi_status status;
+ union acpi_object rom_arg_elements[2], *obj;
+ struct acpi_object_list rom_arg;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
-static inline int
-nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len)
-{
+ rom_arg.count = 2;
+ rom_arg.pointer = &rom_arg_elements[0];
+
+ rom_arg_elements[0].type = ACPI_TYPE_INTEGER;
+ rom_arg_elements[0].integer.value = offset;
+
+ rom_arg_elements[1].type = ACPI_TYPE_INTEGER;
+ rom_arg_elements[1].integer.value = length;
+
+ status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer);
+ if (ACPI_FAILURE(status)) {
+ pr_info("failed to evaluate ROM got %s\n",
+ acpi_format_exception(status));
+ return -ENODEV;
+ }
+ obj = (union acpi_object *)buffer.pointer;
+ length = min(length, obj->buffer.length);
+ memcpy(bios+offset, obj->buffer.pointer, length);
+ kfree(buffer.pointer);
+ return length;
+#else
return -EINVAL;
-}
#endif
+}
/* This version of the shadow function disobeys the ACPI spec and tries
* to fetch in units of more than 4KiB at a time. This is a LOT faster
@@ -51,7 +68,7 @@
u32 fetch = limit - start;
if (nvbios_extend(bios, limit) >= 0) {
- int ret = nouveau_acpi_get_bios_chunk(bios->data, start, fetch);
+ int ret = acpi_read_bios(data, bios->data, start, fetch);
if (ret == fetch)
return fetch;
}
@@ -73,9 +90,8 @@
if (nvbios_extend(bios, limit) >= 0) {
while (start + fetch < limit) {
- int ret = nouveau_acpi_get_bios_chunk(bios->data,
- start + fetch,
- 0x1000);
+ int ret = acpi_read_bios(data, bios->data,
+ start + fetch, 0x1000);
if (ret != 0x1000)
break;
fetch += 0x1000;
@@ -88,9 +104,22 @@
static void *
acpi_init(struct nvkm_bios *bios, const char *name)
{
- if (!nouveau_acpi_rom_supported(bios->subdev.device->dev))
+#if defined(CONFIG_ACPI) && defined(CONFIG_X86)
+ acpi_status status;
+ acpi_handle dhandle, rom_handle;
+
+ dhandle = ACPI_HANDLE(bios->subdev.device->dev);
+ if (!dhandle)
return ERR_PTR(-ENODEV);
- return NULL;
+
+ status = acpi_get_handle(dhandle, "_ROM", &rom_handle);
+ if (ACPI_FAILURE(status))
+ return ERR_PTR(-ENODEV);
+
+ return rom_handle;
+#else
+ return ERR_PTR(-ENODEV);
+#endif
}
const struct nvbios_source
--
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