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>

1 files changed, 9 insertions, 0 deletions

diff --git a/payloads/libpayload/include/coreboot_tables.h b/payloads/libpayload/include/coreboot_tables.h
index 9b69a6d3d3..bf2cf022d1 100644
--- a/payloads/libpayload/include/coreboot_tables.h
+++ b/payloads/libpayload/include/coreboot_tables.h
@@ -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