From: Linus Walleij linus.walleij@linaro.org
commit 1988e0d84161dabd99d1c27033fbd6ee439bf432 upstream.
Failing to read the MTP over DSI should not bring down the system and make us bail out from using the display, it turns out that this happens when toggling the display off and on, and that write is often still working so the display output is just fine. Printing an error is enough.
Tested by killing the Gnome session repeatedly on the Samsung Skomer.
Fixes: 899f24ed8d3a ("drm/panel: Add driver for Novatek NT35510-based panels") Cc: Stephan Gerhold stephan@gerhold.net Reported-by: newbyte@disroot.org Acked-by: Stefan Hansson newbyte@disroot.org Signed-off-by: Linus Walleij linus.walleij@linaro.org Link: https://patchwork.freedesktop.org/patch/msgid/20210603231830.3200040-1-linus... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/panel/panel-novatek-nt35510.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/gpu/drm/panel/panel-novatek-nt35510.c +++ b/drivers/gpu/drm/panel/panel-novatek-nt35510.c @@ -706,9 +706,7 @@ static int nt35510_power_on(struct nt355 if (ret) return ret;
- ret = nt35510_read_id(nt); - if (ret) - return ret; + nt35510_read_id(nt);
/* Set up stuff in manufacturer control, page 1 */ ret = nt35510_send_long(nt, dsi, MCS_CMD_MAUCCTR,