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libpayload: cbgfx: Allow rotation of the display 

Sometimes the display native orientation does not match the device
default orientation, so allow rotation of the framebuffer before
it is displayed on screen.

set_pixel now take coordinates in the rotated coordinate system,
and converts the coordinates before writing to the framebuffer.

Also, screen.size now matches the rotated system (_not_ the
framebuffer size).

BUG=b:132049716
TEST=Boot krane, see that FW screen is orientation properly.

Change-Id: If9316c0ce33c17057372ef5995a2c68de4f11f02
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34732
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Christian Walter <christian.walter@9elements.com>
This commit is contained in:
Nicolas Boichat 2019-08-06 08:23:54 +08:00 committed by Martin Roth
parent 87f265b210
commit 564720f2c8
2 changed files with 44 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
payloads/libpayload/drivers/video/graphics.c
View File

@ -129,8 +129,30 @@ static inline void set_pixel(struct vector *coord, uint32_t color)
{
const int bpp = fbinfo->bits_per_pixel;
const int bpl = fbinfo->bytes_per_line;
struct vector rcoord;
int i;
uint8_t * const pixel = fbaddr + coord->y * bpl + coord->x * bpp / 8;
switch (fbinfo->orientation) {
case CB_FB_ORIENTATION_NORMAL:
default:
rcoord.x = coord->x;
rcoord.y = coord->y;
break;
case CB_FB_ORIENTATION_BOTTOM_UP:
rcoord.x = screen.size.width - 1 - coord->x;
rcoord.y = screen.size.height - 1 - coord->y;
break;
case CB_FB_ORIENTATION_LEFT_UP:
rcoord.x = coord->y;
rcoord.y = screen.size.width - 1 - coord->x;
break;
case CB_FB_ORIENTATION_RIGHT_UP:
rcoord.x = screen.size.height - 1 - coord->y;
rcoord.y = coord->x;
break;
}
uint8_t * const pixel = fbaddr + rcoord.y * bpl + rcoord.x * bpp / 8;
for (i = 0; i < bpp / 8; i++)
pixel[i] = (color >> (i * 8));
}
@ -152,8 +174,17 @@ static int cbgfx_init(void)
if (!fbaddr)
return CBGFX_ERROR_FRAMEBUFFER_ADDR;
screen.size.width = fbinfo->x_resolution;
screen.size.height = fbinfo->y_resolution;
switch (fbinfo->orientation) {
default: /* Normal or rotated 180 degrees. */
screen.size.width = fbinfo->x_resolution;
screen.size.height = fbinfo->y_resolution;
break;
case CB_FB_ORIENTATION_LEFT_UP: /* 90 degree rotation. */
case CB_FB_ORIENTATION_RIGHT_UP:
screen.size.width = fbinfo->y_resolution;
screen.size.height = fbinfo->x_resolution;
break;
}
screen.offset.x = 0;
screen.offset.y = 0;
@ -242,7 +273,7 @@ int clear_screen(const struct rgb_color *rgb)
* We assume that for 32bpp the high byte gets ignored anyway. */
if ((((color >> 8) & 0xff) == (color & 0xff)) && (bpp == 16 ||
(((color >> 16) & 0xff) == (color & 0xff)))) {
memset(fbaddr, color & 0xff, screen.size.height * bpl);
memset(fbaddr, color & 0xff, fbinfo->y_resolution * bpl);
} else {
for (p.y = 0; p.y < screen.size.height; p.y++)
for (p.x = 0; p.x < screen.size.width; p.x++)

9
payloads/libpayload/include/coreboot_tables.h
View File

@ -189,6 +189,14 @@ struct cb_forward {
u64 forward;
};
/* Panel orientation, matches drm_connector.h in the Linux kernel. */
enum cb_fb_orientation {
CB_FB_ORIENTATION_NORMAL = 0,
CB_FB_ORIENTATION_BOTTOM_UP = 1,
CB_FB_ORIENTATION_LEFT_UP = 2,
CB_FB_ORIENTATION_RIGHT_UP = 3,
};
struct cb_framebuffer {
u32 tag;
u32 size;
@ -206,6 +214,7 @@ struct cb_framebuffer {
u8 blue_mask_size;
u8 reserved_mask_pos;
u8 reserved_mask_size;
u8 orientation;
};
#define CB_GPIO_ACTIVE_LOW 0