From 162aedd492c420bbfe3d44dae1770c60a6c367bb Mon Sep 17 00:00:00 2001 From: Jack Andersen Date: Fri, 26 May 2023 12:19:19 -0700 Subject: [PATCH] panel-sitronix-st7701: Fix panel prepare over SPI A DSI write is issued in st7701_prepare even when the probed panel runs on SPI. In practice, this results in a panic with the vc4-kms-dpi-hyperpixel2r overlay active. Perform the equivalent write over SPI in this case. Signed-off-by: Jack Andersen --- drivers/gpu/drm/panel/panel-sitronix-st7701.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/panel/panel-sitronix-st7701.c +++ b/drivers/gpu/drm/panel/panel-sitronix-st7701.c @@ -571,8 +571,16 @@ static int st7701_prepare(struct drm_pan st7701->desc->gip_sequence(st7701); /* Disable Command2 */ - ST7701_DSI(st7701, DSI_CMD2BKX_SEL, - 0x77, 0x01, 0x00, 0x00, DSI_CMD2BKX_SEL_NONE); + switch (st7701->desc->interface) { + case ST7701_CTRL_DSI: + ST7701_DSI(st7701, DSI_CMD2BKX_SEL, + 0x77, 0x01, 0x00, 0x00, DSI_CMD2BKX_SEL_NONE); + break; + case ST7701_CTRL_SPI: + ST7701_SPI(st7701, DSI_CMD2BKX_SEL, + 0x177, 0x101, 0x100, 0x100, SPI_CMD2BKX_SEL_NONE); + break; + } return 0; }