nvidia-390xx-kmod-0093-kernel-6.12-adaptation.patch

From bf29f9a510ddd01412e11b6bf578a1fa1b32ae4a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nicolas=20Vi=C3=A9ville?= <nicolas.vieville@uphf.fr>
Date: Mon, 16 Dec 2024 17:43:36 +0100
Subject: [PATCH] Linux 6.12: nvidia-drm-drv.c adaptation inspired from
 Archlinux and Joan Bruguera gist repository
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Nicolas Viéville <nicolas.vieville@uphf.fr>
---
 kernel/nvidia-drm/nvidia-drm-drv.c | 53 ++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)

diff --git a/kernel/nvidia-drm/nvidia-drm-drv.c b/kernel/nvidia-drm/nvidia-drm-drv.c
index f649202..a0887ff 100644
--- a/kernel/nvidia-drm/nvidia-drm-drv.c
+++ b/kernel/nvidia-drm/nvidia-drm-drv.c
@@ -84,6 +84,10 @@
 #include <drm/drm_atomic_helper.h>
 #endif
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 12, 0)
+#include <drm/drm_client.h>
+#endif
+
 static struct nv_drm_device *dev_list = NULL;
 
 #if defined(NV_DRM_ATOMIC_MODESET_AVAILABLE)
@@ -168,7 +172,15 @@ static const struct drm_mode_config_funcs nv_mode_config_funcs = {
     .atomic_check  = nv_drm_atomic_check,
     .atomic_commit = nv_drm_atomic_commit,
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(6, 12, 0)
+    // Removed by commit 446d0f4849b101bfc35c0d00835c3e3a4804616d
+    // "drm: Remove struct drm_mode_config_funcs.output_poll_changed" in
+    // kernel 6.12 - Thomas Zimmermann, 12 Aug 2024.
+    // Hotplug event support is handled through the fbdev emulation interface
+    // going forward (required for for example /sys/class/drm/card*/modes
+    // to work).
     .output_poll_changed = nv_drm_output_poll_changed,
+#endif
 };
 
 static void nv_drm_event_callback(const struct NvKmsKapiEvent *event)
@@ -652,6 +664,13 @@ static const struct file_operations nv_drm_fops = {
     .read           = drm_read,
 
     .llseek         = noop_llseek,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 12, 0)
+    // Removed by commit 641bb4394f405cba498b100b44541ffc0aed5be1
+    // "fs: move FMODE_UNSIGNED_OFFSET to fop_flags" the FMODE_UNSIGNED_OFFSET
+    // flag has been moved to fop_flags and renamed
+    // Christian Brauner, 9 Aug 2024.
+    .fop_flags      = FOP_UNSIGNED_OFFSET,
+#endif
 };
 
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 8, 0)
@@ -796,6 +815,18 @@ static void nv_drm_update_drm_driver_features(void)
 #endif /* NV_DRM_ATOMIC_MODESET_AVAILABLE */
 }
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 12, 0)
+static int hotplug_helper_client_hotplug(struct drm_client_dev *client)
+{
+    nv_drm_output_poll_changed(client->dev);
+    return 0;
+}
+
+static const struct drm_client_funcs nv_hotplug_helper_client_funcs = {
+    .owner      = THIS_MODULE,
+    .hotplug    = hotplug_helper_client_hotplug,
+};
+#endif
 
 
 /*
@@ -850,6 +881,20 @@ static void nv_drm_register_drm_device(const nv_gpu_info_t *gpu_info)
         goto failed_drm_register;
     }
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 12, 0)
+    /* Register a DRM client for receiving hotplug events */
+    struct drm_client_dev *client = kzalloc(sizeof(*client), GFP_KERNEL);
+    if (client == NULL || drm_client_init(dev, client,
+        "nv-hotplug-helper", &nv_hotplug_helper_client_funcs)) {
+        printk(KERN_WARNING "Failed to initialize the nv-hotplug-helper DRM client"
+            " (ensure DRM kernel mode setting is enabled via nvidia-drm.modeset=1).\n");
+        goto failed_drm_client_init;
+    }
+
+    drm_client_register(client);
+    pr_info("Registered the nv-hotplug-helper DRM client.\n");
+#endif
+
     /* Add NVIDIA-DRM device into list */
 
     nv_dev->next = dev_list;
@@ -857,6 +902,14 @@ static void nv_drm_register_drm_device(const nv_gpu_info_t *gpu_info)
 
     return; /* Success */
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(6, 12, 0)
+failed_drm_client_init:
+
+    kfree(client);
+    drm_dev_unregister(dev);
+
+#endif
+
 failed_drm_register:
 
     nv_drm_dev_free(dev);
-- 
2.47.1