From 7a0073d662db8712b1bc1dff2e430725dd9ceff8 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Fri, 8 Nov 2019 17:39:48 +0200 Subject: [PATCH] drm/i915/bios: use a flag for vbt hdmi level shift presence MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The pre-initialized magic value is a bit silly, switch to a flag instead. v2: Reduce paranoia to a single sanity check (Ville) Cc: Ville Syrjälä Reviewed-by: Ville Syrjälä Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/74fe24ab6d5f0ea2ff2059cdf044d6d3006080fc.1573227240.git.jani.nikula@intel.com --- drivers/gpu/drm/i915/display/intel_bios.c | 10 +--------- drivers/gpu/drm/i915/display/intel_ddi.c | 13 +++++++------ drivers/gpu/drm/i915/i915_drv.h | 8 ++------ 3 files changed, 10 insertions(+), 21 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c index a03f56b7b4ef..c19b234bebe6 100644 --- a/drivers/gpu/drm/i915/display/intel_bios.c +++ b/drivers/gpu/drm/i915/display/intel_bios.c @@ -1509,6 +1509,7 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, port_name(port), hdmi_level_shift); info->hdmi_level_shift = hdmi_level_shift; + info->hdmi_level_shift_set = true; } if (bdb_version >= 204) { @@ -1692,8 +1693,6 @@ parse_general_definitions(struct drm_i915_private *dev_priv, static void init_vbt_defaults(struct drm_i915_private *dev_priv) { - enum port port; - dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC; /* Default to having backlight */ @@ -1721,13 +1720,6 @@ init_vbt_defaults(struct drm_i915_private *dev_priv) dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv, !HAS_PCH_SPLIT(dev_priv)); DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq); - - for_each_port(port) { - struct ddi_vbt_port_info *info = - &dev_priv->vbt.ddi_port_info[port]; - - info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN; - } } /* Defaults to initialize only if there is no VBT. */ diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index a387aea1c809..e56eb8a49cdd 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -888,11 +888,10 @@ icl_get_combo_buf_trans(struct drm_i915_private *dev_priv, int type, int rate, static int intel_ddi_hdmi_level(struct drm_i915_private *dev_priv, enum port port) { + struct ddi_vbt_port_info *port_info = &dev_priv->vbt.ddi_port_info[port]; int n_entries, level, default_entry; enum phy phy = intel_port_to_phy(dev_priv, port); - level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift; - if (INTEL_GEN(dev_priv) >= 12) { if (intel_phy_is_combo(dev_priv, phy)) icl_get_combo_buf_trans(dev_priv, INTEL_OUTPUT_HDMI, @@ -927,12 +926,14 @@ static int intel_ddi_hdmi_level(struct drm_i915_private *dev_priv, enum port por return 0; } - /* Choose a good default if VBT is badly populated */ - if (level == HDMI_LEVEL_SHIFT_UNKNOWN || level >= n_entries) - level = default_entry; - if (WARN_ON_ONCE(n_entries == 0)) return 0; + + if (port_info->hdmi_level_shift_set) + level = port_info->hdmi_level_shift; + else + level = default_entry; + if (WARN_ON_ONCE(level >= n_entries)) level = n_entries - 1; diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index b82ff0bc6d0c..9d95125f1798 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -627,13 +627,9 @@ struct ddi_vbt_port_info { int max_tmds_clock; - /* - * This is an index in the HDMI/DVI DDI buffer translation table. - * The special value HDMI_LEVEL_SHIFT_UNKNOWN means the VBT didn't - * populate this field. - */ -#define HDMI_LEVEL_SHIFT_UNKNOWN 0xff + /* This is an index in the HDMI/DVI DDI buffer translation table. */ u8 hdmi_level_shift; + u8 hdmi_level_shift_set:1; u8 supports_dvi:1; u8 supports_hdmi:1;