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fbcon: Add fbcon_rotate_hint to struct fb_info

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On some hardware the LCD panel is not mounted upright in the casing,
but upside-down or rotated 90 degrees. In this case we want the console
to automatically be rotated to compensate.

The fbdev-driver may know about the need to rotate. Add a new
fbcon_rotate_hint field to struct fb_info, which gets initialized to -1.
If the fbdev-driver knows that some sort of rotation is necessary then
it can set this field to a FB_ROTATE_* value to tell the fbcon console
driver to rotate the console.

Acked-by: Bartlomiej Zolnierkiewicz <[email protected]>
Signed-off-by: Hans de Goede <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
This commit is contained in:
Hans de Goede 2017-11-25 20:35:47 +01:00 • committed by Hans de Goede
commit c9e6a36492
3 changed files with 18 additions and 6 deletions
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18
drivers/video/fbdev/core/fbcon.c
View file

@ -964,10 +964,13 @@ static const char *fbcon_startup(void)
ops->cur_blink_jiffies = HZ / 5;
ops->info = info;
info->fbcon_par = ops;
if (initial_rotation != -1)
p->con_rotate = initial_rotation;
else
p->con_rotate = initial_rotation;
if (p->con_rotate == -1)
p->con_rotate = info->fbcon_rotate_hint;
if (p->con_rotate == -1)
p->con_rotate = fbcon_platform_get_rotate(info);
set_blitting_type(vc, info);
if (info->fix.type != FB_TYPE_TEXT) {
@ -1104,10 +1107,13 @@ static void fbcon_init(struct vc_data *vc, int init)
ops = info->fbcon_par;
ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms);
if (initial_rotation != -1)
p->con_rotate = initial_rotation;
else
p->con_rotate = initial_rotation;
if (p->con_rotate == -1)
p->con_rotate = info->fbcon_rotate_hint;
if (p->con_rotate == -1)
p->con_rotate = fbcon_platform_get_rotate(info);
set_blitting_type(vc, info);
cols = vc->vc_cols;

1
drivers/video/fbdev/core/fbsysfs.c
View file

@ -58,6 +58,7 @@ struct fb_info *framebuffer_alloc(size_t size, struct device *dev)
info->par = p + fb_info_size;
info->device = dev;
info->fbcon_rotate_hint = -1;
#ifdef CONFIG_FB_BACKLIGHT
mutex_init(&info->bl_curve_mutex);