target/linux/bcm27xx/patches-6.1/950-0989-drm-panel-simple-Alter-the-timing-for-the-Pi-7-DSI-d.patch

   1 From b1bd2f406eab321be642decd6aee6b6222aec62b Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Fri, 28 Jul 2023 17:40:27 +0100
   4 Subject: [PATCH] drm/panel: simple: Alter the timing for the Pi 7" DSI display
   5
   6 vc4 has always fixed up the timing, so the values defined have
   7 never actually appeared on the wire.
   8 The display appears to want a slightly longer HFP, so extend
   9 the timings and recompute the clock to give the same frame rate.
  10
  11 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  12 ---
  13  drivers/gpu/drm/panel/panel-simple.c | 8 ++++----
  14  1 file changed, 4 insertions(+), 4 deletions(-)
  15
  16 --- a/drivers/gpu/drm/panel/panel-simple.c
  17 +++ b/drivers/gpu/drm/panel/panel-simple.c
  18 @@ -3241,11 +3241,11 @@ static const struct panel_desc qishenglo
  19  };
  20
  21  static const struct drm_display_mode raspberrypi_7inch_mode = {
  22 -       .clock = 25979400 / 1000,
  23 +       .clock = 27777,
  24         .hdisplay = 800,
  25 -       .hsync_start = 800 + 2,
  26 -       .hsync_end = 800 + 2 + 2,
  27 -       .htotal = 800 + 2 + 2 + 46,
  28 +       .hsync_start = 800 + 59,
  29 +       .hsync_end = 800 + 59 + 2,
  30 +       .htotal = 800 + 59 + 2 + 46,
  31         .vdisplay = 480,
  32         .vsync_start = 480 + 7,
  33         .vsync_end = 480 + 7 + 2,