target/linux/bcm27xx/patches-5.15/950-0624-drm-vc4-hdmi-Add-full-range-RGB-helper.patch

   1 From 4809cf80fdd964c413045e550fb137a18dc98ba2 Mon Sep 17 00:00:00 2001
   2 From: Maxime Ripard <maxime@cerno.tech>
   3 Date: Tue, 12 Jan 2021 15:55:07 +0100
   4 Subject: [PATCH] drm/vc4: hdmi: Add full range RGB helper
   5
   6 We're going to need to tell whether we want to run with a full or
   7 limited range RGB output in multiple places in the code, so let's create
   8 a helper that will return whether we need with full range or not.
   9
  10 Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
  11 Signed-off-by: Maxime Ripard <maxime@cerno.tech>
  12 ---
  13  drivers/gpu/drm/vc4/vc4_hdmi.c | 12 ++++++++++--
  14  1 file changed, 10 insertions(+), 2 deletions(-)
  15
  16 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
  17 +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
  18 @@ -108,6 +108,15 @@ static bool vc4_hdmi_mode_needs_scrambli
  19         return (mode->clock * 1000) > HDMI_14_MAX_TMDS_CLK;
  20  }
  21
  22 +static bool vc4_hdmi_is_full_range_rgb(struct vc4_hdmi *vc4_hdmi,
  23 +                                      const struct drm_display_mode *mode)
  24 +{
  25 +       struct vc4_hdmi_encoder *vc4_encoder = &vc4_hdmi->encoder;
  26 +
  27 +       return !vc4_encoder->hdmi_monitor ||
  28 +               drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_FULL;
  29 +}
  30 +
  31  static int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
  32  {
  33         struct drm_info_node *node = (struct drm_info_node *)m->private;
  34 @@ -1117,8 +1126,7 @@ static void vc4_hdmi_encoder_pre_crtc_en
  35
  36         mutex_lock(&vc4_hdmi->mutex);
  37
  38 -       if (vc4_encoder->hdmi_monitor &&
  39 -           drm_default_rgb_quant_range(mode) == HDMI_QUANTIZATION_RANGE_LIMITED) {
  40 +       if (!vc4_hdmi_is_full_range_rgb(vc4_hdmi, mode)) {
  41                 if (vc4_hdmi->variant->csc_setup)
  42                         vc4_hdmi->variant->csc_setup(vc4_hdmi, true);
  43