From 4680e9cc9d8bc9db8a7489cb77a8d19962bd580e Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Wed, 11 Nov 2020 00:46:52 +0100 Subject: [PATCH] drm/panel: s6e63m0: Support 3WIRE protocol MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The panel can be connected using 3WIRE, then it is however necessary that the flag SPI_3WIRE is preserved on the device, as we set this from generic device tree parsing code (or similar). Just |= the SPI mode. Signed-off-by: Linus Walleij Acked-by: Sam Ravnborg Cc: Stephan Gerhold Cc: Paweł Chmiel Link: https://patchwork.freedesktop.org/patch/msgid/20201110234653.2248594-5-linus.walleij@linaro.org --- drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c index fa24e6889ec18..326deb3177b6c 100644 --- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c +++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c @@ -72,7 +72,8 @@ static int s6e63m0_spi_probe(struct spi_device *spi) int ret; spi->bits_per_word = 9; - spi->mode = SPI_MODE_3; + /* Preserve e.g. SPI_3WIRE setting */ + spi->mode |= SPI_MODE_3; ret = spi_setup(spi); if (ret < 0) { dev_err(dev, "spi setup failed.\n"); -- 2.30.2