Commit c9e6a364 authored by Hans de Goede's avatar Hans de Goede Committed by Hans de Goede
Browse files

fbcon: Add fbcon_rotate_hint to struct fb_info 



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: default avatarBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171125193553.23986-2-hdegoede@redhat.com
parent 7b47c66c

drivers/video/fbdev/core/fbcon.c

+12 −6
Original line number Diff line number Diff line
@@ -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

	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

	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;

drivers/video/fbdev/core/fbsysfs.c

+1 −0
Original line number Diff line number Diff line
@@ -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);

include/linux/fb.h

+5 −0
Original line number Diff line number Diff line
@@ -465,6 +465,11 @@ struct fb_info { 
	atomic_t count;

	int node;

	int flags;

	/*

	 * -1 by default, set to a FB_ROTATE_* value by the driver, if it knows

	 * a lcd is not mounted upright and fbcon should rotate to compensate.

	 */

	int fbcon_rotate_hint;

	struct mutex lock;		/* Lock for open/release/ioctl funcs */

	struct mutex mm_lock;		/* Lock for fb_mmap and smem_* fields */

	struct fb_var_screeninfo var;	/* Current var */

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