File plymouth-only_use_fb_for_cirrus_bochs.patch of Package plymouth

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File plymouth-only_use_fb_for_cirrus_bochs.patch of Package plymouth (Revision 18e5475de9a457c72a51eabf1300a870)

Currently displaying revision 18e5475de9a457c72a51eabf1300a870 , Show latest

From: Fabian Vogt <fvogt@suse.com>
Subject: force fb for cirrus and bochs, force drm otherwise
References: bsc#888590, bsc#980750

DRM does not work well with cirrus and bochs (no display) but the framebuffer driver
prevents DRM drivers from loading.
As we need to support cirrus for libvirt and bochs for QEMU, we cannot just remove support for frame-buffer.

Index: plymouth-0.9.3+git20180807.7663b0c/src/libply-splash-core/ply-device-manager.c
===================================================================

diff -Nura plymouth-0.9.5~git20220412.e960111/src/libply-splash-core/ply-device-manager.c plymouth-0.9.5~git20220412.e960111_new/src/libply-splash-core/ply-device-manager.c
--- plymouth-0.9.5~git20220412.e960111/src/libply-splash-core/ply-device-manager.c	2022-04-15 16:39:24.000000000 +0800
+++ plymouth-0.9.5~git20220412.e960111_new/src/libply-splash-core/ply-device-manager.c	2022-04-18 16:33:00.126364096 +0800
@@ -279,13 +279,33 @@
                 subsystem = udev_device_get_subsystem (device);
                 ply_trace ("device subsystem is %s", subsystem);
 
+                const char *card_vendor = udev_device_get_sysattr_value (device, "device/vendor");
+                const char *card_device = udev_device_get_sysattr_value (device, "device/device");
+                bool use_fb = false;
+                if (card_vendor) {
+                        /* Cirrus */
+                        if (strcmp ("0x1013", card_vendor) == 0)
+                                use_fb = true;
+                        /* "Technical Corp", also used by bochs */
+                        else if (strcmp ("0x1234", card_vendor) == 0)
+                                use_fb = strcmp("0x1111", card_device) == 0;
+                }
+
                 if (strcmp (subsystem, SUBSYSTEM_DRM) == 0) {
                         ply_trace ("found DRM device %s", device_path);
                         renderer_type = PLY_RENDERER_TYPE_DRM;
+                        if (use_fb) {
+                                ply_trace ("forcing use of framebuffer for cirrusdrmfb");
+                                renderer_type = PLY_RENDERER_TYPE_NONE;
+                        }
                 } else if (strcmp (subsystem, SUBSYSTEM_FRAME_BUFFER) == 0) {
                         ply_trace ("found frame buffer device %s", device_path);
-                        if (!fb_device_has_drm_device (manager, device))
+                        if (use_fb) {
                                 renderer_type = PLY_RENDERER_TYPE_FRAME_BUFFER;
+                        }
+                        else if (!fb_device_has_drm_device (manager, device)) {
+                                ply_trace ("avoiding use of framebuffer to not block DRM drivers from working");
+                        }
                         else
                                 ply_trace ("ignoring, since there's a DRM device associated with it");
                 }

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File plymouth-only_use_fb_for_cirrus_bochs.patch of Package plymouth (Revision 18e5475de9a457c72a51eabf1300a870)

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