target/linux/bcm27xx/patches-5.4/950-0617-drm-vc4-Fixup-for-firmware-KMS.patch

   1 From 3c10a82ae5ce60ee8b4dbd1d1f8436efaa4593c3 Mon Sep 17 00:00:00 2001
   2 From: Dave Stevenson <dave.stevenson@raspberrypi.com>
   3 Date: Mon, 30 Mar 2020 12:52:26 +0100
   4 Subject: [PATCH] drm/vc4: Fixup for firmware KMS
   5
   6 Fix up "drm/vc4: Kick the core clock up during a mode change" for
   7 firmware KMS mode where we don't have the HVS or core clock
   8 configured.
   9
  10 Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
  11 ---
  12  drivers/gpu/drm/vc4/vc4_kms.c | 6 ++++--
  13  1 file changed, 4 insertions(+), 2 deletions(-)
  14
  15 --- a/drivers/gpu/drm/vc4/vc4_kms.c
  16 +++ b/drivers/gpu/drm/vc4/vc4_kms.c
  17 @@ -239,7 +239,8 @@ vc4_atomic_complete_commit(struct drm_at
  18                 vc4_hvs_mask_underrun(dev, vc4_crtc_state->assigned_channel);
  19         }
  20
  21 -       clk_set_rate(hvs->core_clk, 500000000);
  22 +       if (!vc4->firmware_kms)
  23 +               clk_set_rate(hvs->core_clk, 500000000);
  24
  25         drm_atomic_helper_wait_for_fences(dev, state, false);
  26
  27 @@ -266,7 +267,8 @@ vc4_atomic_complete_commit(struct drm_at
  28
  29         drm_atomic_helper_commit_cleanup_done(state);
  30
  31 -       clk_set_rate(hvs->core_clk, 200000000);
  32 +       if (!vc4->firmware_kms)
  33 +               clk_set_rate(hvs->core_clk, 200000000);
  34
  35         drm_atomic_state_put(state);
  36