From: "Luis R. Rodriguez" <mcg...@do-not-panic.com>
This adds helpers to enable and test for the skip_vt_switch.
This gets us two things:
1) It allows us to require less collateral evolutions
should we need changes on the fb_info data structure
later (perhaps a bitmap flag).
2) Allows this feature to be backported with 0 delta
required on the upstream drivers, we'd just require
the static inline to do a no-op.
1) may be worth while considering, 2) is a new consideration
I'm trying to get others to evaluate to help with automatically
backporting the Linux kernel. This is the first time I am
aware someone argues for it.
Cc: co...@systeme.lip6.fr
Cc: backpo...@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: Julia Lawall <julia.law...@lip6.fr>
Cc: Rodrigo Vivi <rodrigo.v...@gmail.com>
Cc: Daniel Vetter <daniel.vet...@ffwll.ch>
Cc: Jesse Barnes <jbar...@virtuousgeek.org>
Cc: Rafael J. Wysocki <rafael.j.wyso...@intel.com>
Signed-off-by: Luis R. Rodriguez <mcg...@do-not-panic.com>
---
drivers/gpu/drm/i915/intel_fb.c | 2 +-
drivers/video/fbmem.c | 2 +-
include/linux/fb.h | 10 ++++++++++
3 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_fb.c b/drivers/gpu/drm/i915/intel_fb.c
index 8d81c929..c0f306c 100644
--- a/drivers/gpu/drm/i915/intel_fb.c
+++ b/drivers/gpu/drm/i915/intel_fb.c
@@ -151,7 +151,7 @@ static int intelfb_create(struct drm_fb_helper *helper,
info->screen_size = size;
/* This driver doesn't need a VT switch to restore the mode on resume */
- info->skip_vt_switch = true;
+ fb_enable_skip_vt_switch(info);
drm_fb_helper_fill_fix(info, fb->pitches[0], fb->depth);
drm_fb_helper_fill_var(info, &ifbdev->helper, sizes->fb_width,
sizes->fb_height);
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index ccd44b0..daffadc 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1645,7 +1645,7 @@ static int do_register_framebuffer(struct fb_info
*fb_info)
if (!fb_info->modelist.prev || !fb_info->modelist.next)
INIT_LIST_HEAD(&fb_info->modelist);
- if (fb_info->skip_vt_switch)
+ if (fb_skip_vt_switch_isset(fb_info))
pm_vt_switch_required(fb_info->dev, false);
else
pm_vt_switch_required(fb_info->dev, true);
diff --git a/include/linux/fb.h b/include/linux/fb.h
index d49c60f..d534966 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -505,6 +505,16 @@ struct fb_info {
bool skip_vt_switch; /* no VT switch on suspend/resume required */
};
+static inline void fb_enable_skip_vt_switch(struct fb_info *info)
+{
+ info->skip_vt_switch = true;
+}
+
+static inline bool fb_skip_vt_switch_isset(struct fb_info *info)
+{
+ return info->skip_vt_switch;
+}
+
static inline struct apertures_struct *alloc_apertures(unsigned int max_num) {
struct apertures_struct *a = kzalloc(sizeof(struct apertures_struct)
+ max_num * sizeof(struct aperture), GFP_KERNEL);
--
1.7.10.4
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