kernel_5.10 no rt

hc

2023-12-11 6778948f9de86c3cfaf36725a7c87dcff9ba247f

 kernel/drivers/gpu/drm/nouveau/nouveau_acpi.c
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@@ -1,4 +1,4 @@
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-// SPDX-License-Identifier: GPL-2.0
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+// SPDX-License-Identifier: MIT
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 #include <linux/pci.h>
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 #include <linux/acpi.h>
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 #include <linux/slab.h>
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@@ -49,7 +49,6 @@
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 	bool optimus_flags_detected;
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 	bool optimus_skip_dsm;
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 	acpi_handle dhandle;
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-	acpi_handle rom_handle;
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 } nouveau_dsm_priv;
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 bool nouveau_is_optimus(void) {
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@@ -212,37 +211,6 @@
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 	.get_client_id = nouveau_dsm_get_client_id,
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 };
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-/*
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- * Firmware supporting Windows 8 or later do not use _DSM to put the device into
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- * D3cold, they instead rely on disabling power resources on the parent.
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- */
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-static bool nouveau_pr3_present(struct pci_dev *pdev)
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-{
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-	struct pci_dev *parent_pdev = pci_upstream_bridge(pdev);
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-	struct acpi_device *parent_adev;
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-
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-	if (!parent_pdev)
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-		return false;
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-
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-	if (!parent_pdev->bridge_d3) {
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-		/*
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-		 * Parent PCI bridge is currently not power managed.
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-		 * Since userspace can change these afterwards to be on
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-		 * the safe side we stick with _DSM and prevent usage of
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-		 * _PR3 from the bridge.
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-		 */
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-		pci_d3cold_disable(pdev);
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-		return false;
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-	}
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-
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-	parent_adev = ACPI_COMPANION(&parent_pdev->dev);
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-	if (!parent_adev)
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-		return false;
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-
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-	return parent_adev->power.flags.power_resources &&
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-		acpi_has_method(parent_adev->handle, "_PR3");
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-}
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-
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 static void nouveau_dsm_pci_probe(struct pci_dev *pdev, acpi_handle *dhandle_out,
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 				  bool *has_mux, bool *has_opt,
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 				  bool *has_opt_flags, bool *has_pr3)
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@@ -250,6 +218,16 @@
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 	acpi_handle dhandle;
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 	bool supports_mux;
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 	int optimus_funcs;
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+	struct pci_dev *parent_pdev;
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+
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+	*has_pr3 = false;
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+	parent_pdev = pci_upstream_bridge(pdev);
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+	if (parent_pdev) {
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+		if (parent_pdev->bridge_d3)
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+			*has_pr3 = pci_pr3_present(parent_pdev);
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+		else
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+			pci_d3cold_disable(pdev);
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+	}
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 	dhandle = ACPI_HANDLE(&pdev->dev);
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 	if (!dhandle)
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@@ -270,7 +248,6 @@
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 	*has_mux = supports_mux;
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 	*has_opt = !!optimus_funcs;
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 	*has_opt_flags = optimus_funcs & (1 << NOUVEAU_DSM_OPTIMUS_FLAGS);
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-	*has_pr3 = false;
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 	if (optimus_funcs) {
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 		uint32_t result;
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@@ -280,8 +257,6 @@
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 			 (result & OPTIMUS_ENABLED) ? "enabled" : "disabled",
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 			 (result & OPTIMUS_DYNAMIC_PWR_CAP) ? "dynamic power, " : "",
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 			 (result & OPTIMUS_HDA_CODEC_MASK) ? "hda bios codec supported" : "");
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-
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-		*has_pr3 = nouveau_pr3_present(pdev);
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 	}
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 }
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@@ -384,59 +359,6 @@
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 void nouveau_unregister_dsm_handler(void) {}
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 void nouveau_switcheroo_optimus_dsm(void) {}
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 #endif
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-
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-/* retrieve the ROM in 4k blocks */
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-static int nouveau_rom_call(acpi_handle rom_handle, uint8_t *bios,
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-			    int offset, int len)
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-{
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-	acpi_status status;
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-	union acpi_object rom_arg_elements[2], *obj;
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-	struct acpi_object_list rom_arg;
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-	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
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-
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-	rom_arg.count = 2;
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-	rom_arg.pointer = &rom_arg_elements[0];
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-
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-	rom_arg_elements[0].type = ACPI_TYPE_INTEGER;
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-	rom_arg_elements[0].integer.value = offset;
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-
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-	rom_arg_elements[1].type = ACPI_TYPE_INTEGER;
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-	rom_arg_elements[1].integer.value = len;
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-
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-	status = acpi_evaluate_object(rom_handle, NULL, &rom_arg, &buffer);
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-	if (ACPI_FAILURE(status)) {
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-		pr_info("failed to evaluate ROM got %s\n",
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-			acpi_format_exception(status));
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-		return -ENODEV;
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-	}
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-	obj = (union acpi_object *)buffer.pointer;
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-	len = min(len, (int)obj->buffer.length);
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-	memcpy(bios+offset, obj->buffer.pointer, len);
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-	kfree(buffer.pointer);
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-	return len;
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-}
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-
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-bool nouveau_acpi_rom_supported(struct device *dev)
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-{
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-	acpi_status status;
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-	acpi_handle dhandle, rom_handle;
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-
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-	dhandle = ACPI_HANDLE(dev);
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-	if (!dhandle)
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-		return false;
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-
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-	status = acpi_get_handle(dhandle, "_ROM", &rom_handle);
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-	if (ACPI_FAILURE(status))
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-		return false;
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-
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-	nouveau_dsm_priv.rom_handle = rom_handle;
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-	return true;
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-}
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-
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-int nouveau_acpi_get_bios_chunk(uint8_t *bios, int offset, int len)
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-{
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-	return nouveau_rom_call(nouveau_dsm_priv.rom_handle, bios, offset, len);
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-}
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 void *
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 nouveau_acpi_edid(struct drm_device *dev, struct drm_connector *connector)