This is a note to let you know that I've just added the patch titled Input: s6sy761 - fix coordinate read bit shift to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: input-s6sy761-fix-coordinate-read-bit-shift.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 30b3f68715595dee7fe4d9bd91a2252c3becdf0a Mon Sep 17 00:00:00 2001 From: Caleb Connolly <caleb@xxxxxxxxxxxxx> Date: Sun, 7 Mar 2021 15:12:22 -0800 Subject: Input: s6sy761 - fix coordinate read bit shift From: Caleb Connolly <caleb@xxxxxxxxxxxxx> commit 30b3f68715595dee7fe4d9bd91a2252c3becdf0a upstream. The touch coordinate register contains the following: byte 3 byte 2 byte 1 +--------+--------+ +-----------------+ +-----------------+ | | | | | | | | X[3:0] | Y[3:0] | | Y[11:4] | | X[11:4] | | | | | | | | +--------+--------+ +-----------------+ +-----------------+ Bytes 2 and 1 need to be shifted left by 4 bits, the least significant nibble of each is stored in byte 3. Currently they are only being shifted by 3 causing the reported coordinates to be incorrect. This matches downstream examples, and has been confirmed on my device (OnePlus 7 Pro). Fixes: 0145a7141e59 ("Input: add support for the Samsung S6SY761 touchscreen") Signed-off-by: Caleb Connolly <caleb@xxxxxxxxxxxxx> Reviewed-by: Andi Shyti <andi@xxxxxxxxxxx> Link: https://lore.kernel.org/r/20210305185710.225168-1-caleb@xxxxxxxxxxxxx Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/input/touchscreen/s6sy761.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/input/touchscreen/s6sy761.c +++ b/drivers/input/touchscreen/s6sy761.c @@ -145,8 +145,8 @@ static void s6sy761_report_coordinates(s u8 major = event[4]; u8 minor = event[5]; u8 z = event[6] & S6SY761_MASK_Z; - u16 x = (event[1] << 3) | ((event[3] & S6SY761_MASK_X) >> 4); - u16 y = (event[2] << 3) | (event[3] & S6SY761_MASK_Y); + u16 x = (event[1] << 4) | ((event[3] & S6SY761_MASK_X) >> 4); + u16 y = (event[2] << 4) | (event[3] & S6SY761_MASK_Y); input_mt_slot(sdata->input, tid); Patches currently in stable-queue which might be from caleb@xxxxxxxxxxxxx are queue-4.19/input-s6sy761-fix-coordinate-read-bit-shift.patch