2019-05-20 09:29:11

by Daniel Vetter

Subject: [PATCH 30/33] vgaswitcheroo: call fbcon_remap_all directly

While at it, clean up the interface a bit and push the console locking
into fbcon.c.

Signed-off-by: Daniel Vetter <[email protected]>
Cc: Lukas Wunner <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Sean Paul <[email protected]>
Cc: Bartlomiej Zolnierkiewicz <[email protected]>
Cc: Hans de Goede <[email protected]>
Cc: Yisheng Xie <[email protected]>
Cc: [email protected]
---
drivers/gpu/vga/vga_switcheroo.c | 11 +++--------
drivers/video/fbdev/core/fbcon.c | 13 +++++--------
include/linux/fb.h | 2 --
include/linux/fbcon.h | 2 ++
4 files changed, 10 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/vga/vga_switcheroo.c b/drivers/gpu/vga/vga_switcheroo.c
index a132c37d7334..65d7541c413a 100644
--- a/drivers/gpu/vga/vga_switcheroo.c
+++ b/drivers/gpu/vga/vga_switcheroo.c
@@ -35,6 +35,7 @@
#include <linux/debugfs.h>
#include <linux/fb.h>
#include <linux/fs.h>
+#include <linux/fbcon.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/pm_domain.h>
@@ -736,14 +737,8 @@ static int vga_switchto_stage2(struct vga_switcheroo_client *new_client)
if (!active->driver_power_control)
set_audio_state(active->id, VGA_SWITCHEROO_OFF);

- if (new_client->fb_info) {
- struct fb_event event;
-
- console_lock();
- event.info = new_client->fb_info;
- fb_notifier_call_chain(FB_EVENT_REMAP_ALL_CONSOLE, &event);
- console_unlock();
- }
+ if (new_client->fb_info)
+ fbcon_remap_all(new_client->fb_info);

mutex_lock(&vgasr_priv.mux_hw_lock);
ret = vgasr_priv.handler->switchto(new_client->id);
diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c
index 8cc62d340387..fd604ffb3c05 100644
--- a/drivers/video/fbdev/core/fbcon.c
+++ b/drivers/video/fbdev/core/fbcon.c
@@ -3146,16 +3146,16 @@ void fbcon_fb_unregistered(struct fb_info *info)
}

/* called with console_lock held */
-static void fbcon_remap_all(int idx)
+void fbcon_remap_all(struct fb_info *info)
{
- int i;
-
- WARN_CONSOLE_UNLOCKED();
+ int i, idx = info->node;

+ console_lock();
if (deferred_takeover) {
for (i = first_fb_vc; i <= last_fb_vc; i++)
con2fb_map_boot[i] = idx;
fbcon_map_override();
+ console_unlock();
return;
}

@@ -3168,6 +3168,7 @@ static void fbcon_remap_all(int idx)
first_fb_vc + 1, last_fb_vc + 1);
info_idx = idx;
}
+ console_unlock();
}

#ifdef CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY
@@ -3333,10 +3334,6 @@ static int fbcon_event_notify(struct notifier_block *self,
con2fb = event->data;
con2fb->framebuffer = con2fb_map[con2fb->console - 1];
break;
- case FB_EVENT_REMAP_ALL_CONSOLE:
- idx = info->node;
- fbcon_remap_all(idx);
- break;
}
return ret;
}
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 54d6bee09121..acd8daa23002 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -130,8 +130,6 @@ struct fb_cursor_user {
#define FB_EVENT_SET_CONSOLE_MAP 0x08
/* A display blank is requested */
#define FB_EVENT_BLANK 0x09
-/* CONSOLE-SPECIFIC: remap all consoles to new fb - for vga_switcheroo */
-#define FB_EVENT_REMAP_ALL_CONSOLE 0x0F
/* A hardware display blank early change occurred */
#define FB_EARLY_EVENT_BLANK 0x10
/* A hardware display blank revert early change occurred */
diff --git a/include/linux/fbcon.h b/include/linux/fbcon.h
index daaa97b0c9e6..3f854e803746 100644
--- a/include/linux/fbcon.h
+++ b/include/linux/fbcon.h
@@ -16,6 +16,7 @@ void fbcon_get_requirement(struct fb_info *info,
struct fb_blit_caps *caps);
void fbcon_fb_blanked(struct fb_info *info, int blank);
void fbcon_update_vcs(struct fb_info *info, bool all);
+void fbcon_remap_all(struct fb_info *info);
#else
static inline void fb_console_init(void) {}
static inline void fb_console_exit(void) {}
@@ -31,6 +32,7 @@ void fbcon_get_requirement(struct fb_info *info,
struct fb_blit_caps *caps) {}
void fbcon_fb_blanked(struct fb_info *info, int blank) {}
void fbcon_update_vcs(struct fb_info *info, bool all) {}
+void fbcon_remap_all(struct fb_info *info) {}
#endif

#endif /* _LINUX_FBCON_H */
--
2.20.1

2019-05-20 11:24:02

by Lukas Wunner

Subject: Re: [PATCH 30/33] vgaswitcheroo: call fbcon_remap_all directly

On Mon, May 20, 2019 at 10:22:13AM +0200, Daniel Vetter wrote:
> --- a/drivers/video/fbdev/core/fbcon.c
> +++ b/drivers/video/fbdev/core/fbcon.c
> @@ -3146,16 +3146,16 @@ void fbcon_fb_unregistered(struct fb_info *info)
> }
>
> /* called with console_lock held */
> -static void fbcon_remap_all(int idx)

That comment needs to be removed as well.

Not an expert on fbcon code but this looks sane to me, so in case it helps:
Acked-by: Lukas Wunner <[email protected]>

Thanks,

Lukas