JLT
July 28, 2023, 4:26pm
1
Hey,
Help is welcome. As owner of a super handy USB screen I seek to install displaylink/evdi on SLED 15.5
Which operating systems does DisplayLink currently support? – DisplayLink Support
However, this is the typical ordeal as with almost any other distro outside of Ubuntu.
Working with Rocky/RHEL9.X i managed to get the rpm to compile with minor modifcation.
install fail on Rocky Linux 9.1 , root cause identified + patch proposed in issue · Issue #232 · displaylink-rpm/displaylink-rpm · GitHub
root cause dma-buf-map.h is now iosys-map solution changes required in just one file evdi_gem.c
rename dma-buf-map.h to iosys-map.h
change dma_buf_map to iosys_map
change DMA_BUF_MAP_INIT_VADDR to IOSYS_MAP_INIT_VADDR
Not with SLED 15.5 though; code for evdi/displaylink appears to have changed even more, the OpenSuse repo packages all fail to install and i don’t find the work around to have it compile.
https://software.opensuse.org/package/displaylink?search_term=DisplayLink
@JLT Here’s a quick patch for the 1.14.0 evdi version…
diff -Nuar a/module/evdi_drm_drv.h b/module/evdi_drm_drv.h
--- a/module/evdi_drm_drv.h 2023-05-16 07:47:57.000000000 -0500
+++ b/module/evdi_drm_drv.h 2023-07-29 10:10:30.139876763 -0500
@@ -26,7 +26,7 @@
#else
#include <drm/drmP.h>
#endif
-#if KERNEL_VERSION(5, 15, 0) <= LINUX_VERSION_CODE || defined(EL8) || defined(EL9)
+#if KERNEL_VERSION(5, 14, 0) <= LINUX_VERSION_CODE
#include <drm/drm_framebuffer.h>
#else
#include <drm/drm_irq.h>
diff -Nuar a/module/evdi_gem.c b/module/evdi_gem.c
--- a/module/evdi_gem.c 2023-05-16 07:47:57.000000000 -0500
+++ b/module/evdi_gem.c 2023-07-29 10:21:48.032411571 -0500
@@ -10,10 +10,7 @@
#include <linux/sched.h>
#include <linux/version.h>
-#if KERNEL_VERSION(5, 18, 0) <= LINUX_VERSION_CODE || defined(EL8) || defined(EL9)
-#elif KERNEL_VERSION(5, 11, 0) <= LINUX_VERSION_CODE
-#include <linux/dma-buf-map.h>
-#endif
+#include <linux/iosys-map.h>
#if KERNEL_VERSION(5, 16, 0) <= LINUX_VERSION_CODE || defined(EL9)
#include <drm/drm_prime.h>
#include <drm/drm_file.h>
@@ -292,7 +289,7 @@
#if KERNEL_VERSION(5, 18, 0) <= LINUX_VERSION_CODE || defined(EL8) || defined(EL9)
struct iosys_map map = IOSYS_MAP_INIT_VADDR(NULL);
#elif KERNEL_VERSION(5, 11, 0) <= LINUX_VERSION_CODE || defined(EL8)
- struct dma_buf_map map = DMA_BUF_MAP_INIT_VADDR(NULL);
+ struct iosys_map map = IOSYS_MAP_INIT_VADDR(NULL);
#endif
#if KERNEL_VERSION(5, 11, 0) <= LINUX_VERSION_CODE || defined(EL8)
@@ -333,12 +330,12 @@
dma_buf_vunmap(obj->base.import_attach->dmabuf, &map);
#elif KERNEL_VERSION(5, 11, 0) <= LINUX_VERSION_CODE || defined(EL8)
- struct dma_buf_map map;
+ struct iosys_map map;
if (obj->vmap_is_iomem)
- dma_buf_map_set_vaddr_iomem(&map, obj->vmapping);
+ iosys_map_set_vaddr_iomem(&map, obj->vmapping);
else
- dma_buf_map_set_vaddr(&map, obj->vmapping);
+ iosys_map_set_vaddr(&map, obj->vmapping);
dma_buf_vunmap(obj->base.import_attach->dmabuf, &map);
#else
diff -Nuar a/module/evdi_params.h b/module/evdi_params.h
--- a/module/evdi_params.h 2023-05-16 07:47:57.000000000 -0500
+++ b/module/evdi_params.h 2023-07-29 10:13:36.520544757 -0500
@@ -12,4 +12,7 @@
extern unsigned int evdi_loglevel;
extern unsigned short int evdi_initial_device_count;
+#include <linux/module.h>
+MODULE_IMPORT_NS(DMA_BUF);
+
#endif /* EVDI_PARAMS_H */