Commit 5ff048f4 authored Feb 10, 2022 by Oliver Graute Committed by Greg Kroah-Hartman Mar 28, 2022

staging: fbtft: fb_st7789v: reset display before initialization



commit b6821b0d9b56386d2bf14806f90ec401468c799f upstream.

In rare cases the display is flipped or mirrored. This was observed more
often in a low temperature environment. A clean reset on init_display()
should help to get registers in a sane state.

Fixes: ef8f3177 (staging: fbtft: use init function instead of init sequence)
Cc: stable@vger.kernel.org
Signed-off-by: Oliver Graute <oliver.graute@kococonnector.com>
Link: https://lore.kernel.org/r/20220210085322.15676-1-oliver.graute@kococonnector.com


[sudip: adjust context]
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 637d12f9

drivers/staging/fbtft/fb_st7789v.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -76,6 +76,8 @@ enum st7789v_command {
		*/
		static int init_display(struct fbtft_par *par)
		{
		par->fbtftops.reset(par);

		/* turn off sleep mode */
		write_reg(par, MIPI_DCS_EXIT_SLEEP_MODE);
		mdelay(120);