target/linux/bcm27xx/patches-5.15/950-0804-drm-panel-panel-ilitek9881c-Add-prepare_upstream_fir.patch

   1 From 3326a363351e727a227a5dfcbec1665b97a1a7e9 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Thu, 31 Mar 2022 12:05:04 +0100
   4 Subject: [PATCH] drm/panel: panel-ilitek9881c: Add
   5  prepare_upstream_first flag
   6
   7 The panel sends MIPI DCS commands during prepare and is expecting
   8 the bus to remain in LP-11 state in-between.
   9
  10 Set the prepare_upstream_first flag so that the upstream DSI host
  11 is prepared / pre_enabled first, and therefore the bus is in a
  12 defined state.
  13
  14 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  15 ---
  16  drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 1 +
  17  1 file changed, 1 insertion(+)
  18
  19 --- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
  20 +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
  21 @@ -888,6 +888,7 @@ static int ili9881c_dsi_probe(struct mip
  22         ctx->dsi = dsi;
  23         ctx->desc = of_device_get_match_data(&dsi->dev);
  24
  25 +       ctx->panel.prepare_upstream_first = true;
  26         drm_panel_init(&ctx->panel, &dsi->dev, &ili9881c_funcs,
  27                        DRM_MODE_CONNECTOR_DSI);
  28