From e26a2d9e36d0ccb2526e9f3455abe3f22f0971c7 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@redhat.com>
Date: Thu, 26 Mar 2020 16:10:09 +0100
Subject: drm/fb-helper: Add TODO for making drm_fb_helper_alloc_fbi fill
Git-commit: 1a8bf67df6d87912ab1fc17fa1a7d63fbddddaee
Patch-mainline: v5.8-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
apertures
Currently drivers using drm_fbdev_generic_setup() end up with a single
empty aperture in their fb_info struct.
Not having the proper info in the apertures list causes
register_framebuffer to not remove conflicting framebuffers,
which some drivers currently workaround by manually calling
drm_fb_helper_remove_conflicting_pci_framebuffers().
Add a TODO as a reminder that we need to fix this.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200326151009.102377-1-hdegoede@redhat.com
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/drm_fb_helper.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index a9771de4d17e..165c8dab5079 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -514,6 +514,14 @@ struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper)
if (ret)
goto err_release;
+ /*
+ * TODO: We really should be smarter here and alloc an apperture
+ * for each IORESOURCE_MEM resource helper->dev->dev has and also
+ * init the ranges of the appertures based on the resources.
+ * Note some drivers currently count on there being only 1 empty
+ * aperture and fill this themselves, these will need to be dealt
+ * with somehow when fixing this.
+ */
info->apertures = alloc_apertures(1);
if (!info->apertures) {
ret = -ENOMEM;
--
2.28.0