target/linux/bcm27xx/patches-6.1/950-0742-panel-sitronix-st7701-Fix-panel-prepare-over-SPI.patch

   1 From 162aedd492c420bbfe3d44dae1770c60a6c367bb Mon Sep 17 00:00:00 2001
   2 From: Jack Andersen <jackoalan@gmail.com>
   3 Date: Fri, 26 May 2023 12:19:19 -0700
   4 Subject: [PATCH] panel-sitronix-st7701: Fix panel prepare over SPI
   5
   6 A DSI write is issued in st7701_prepare even when the probed panel
   7 runs on SPI. In practice, this results in a panic with the
   8 vc4-kms-dpi-hyperpixel2r overlay active.
   9
  10 Perform the equivalent write over SPI in this case.
  11
  12 Signed-off-by: Jack Andersen <jackoalan@gmail.com>
  13 ---
  14  drivers/gpu/drm/panel/panel-sitronix-st7701.c | 12 ++++++++++--
  15  1 file changed, 10 insertions(+), 2 deletions(-)
  16
  17 --- a/drivers/gpu/drm/panel/panel-sitronix-st7701.c
  18 +++ b/drivers/gpu/drm/panel/panel-sitronix-st7701.c
  19 @@ -571,8 +571,16 @@ static int st7701_prepare(struct drm_pan
  20                 st7701->desc->gip_sequence(st7701);
  21
  22         /* Disable Command2 */
  23 -       ST7701_DSI(st7701, DSI_CMD2BKX_SEL,
  24 -                  0x77, 0x01, 0x00, 0x00, DSI_CMD2BKX_SEL_NONE);
  25 +       switch (st7701->desc->interface) {
  26 +       case ST7701_CTRL_DSI:
  27 +               ST7701_DSI(st7701, DSI_CMD2BKX_SEL,
  28 +                          0x77, 0x01, 0x00, 0x00, DSI_CMD2BKX_SEL_NONE);
  29 +               break;
  30 +       case ST7701_CTRL_SPI:
  31 +               ST7701_SPI(st7701, DSI_CMD2BKX_SEL,
  32 +                          0x177, 0x101, 0x100, 0x100, SPI_CMD2BKX_SEL_NONE);
  33 +               break;
  34 +       }
  35
  36         return 0;
  37  }