diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2017-10-30 16:57:02 +0200 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2017-10-30 19:48:11 +0200 |
| commit | d6038611aa3d7d8080a8ae7f3122779fb4779a13 (patch) | |
| tree | 1544894356d80361c620fce7e3a1d579afc13cdd /drivers/gpu/drm/i915/intel_bios.c | |
| parent | 6e8fbf8d19e48ca3b451233c8939b493a51d030d (diff) | |
drm/i915: Parse max HDMI TMDS clock from VBT
Starting from version 204 VBT can specify the max TMDS clock we are
allowed to use with HDMI ports. Parse that information and take it
into account when filtering modes and computing a crtc state.
Also take the opportunity to sort the platform check if ladder
from new to old.
v2: Add defines for the values into intel_vbt_defs.h (Jani)
Don't fall back to 0 silently for unknown values (Jani)
Skip the debug print for the 0 case (Jani)
Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171030145702.23662-1-ville.syrjala@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/intel_bios.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_bios.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index 5e122673d32a..5c016b1f0f24 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -1227,6 +1227,30 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port, info->hdmi_level_shift = hdmi_level_shift; } + if (bdb_version >= 204) { + int max_tmds_clock; + + switch (child->hdmi_max_data_rate) { + default: + MISSING_CASE(child->hdmi_max_data_rate); + /* fall through */ + case HDMI_MAX_DATA_RATE_PLATFORM: + max_tmds_clock = 0; + break; + case HDMI_MAX_DATA_RATE_297: + max_tmds_clock = 297000; + break; + case HDMI_MAX_DATA_RATE_165: + max_tmds_clock = 165000; + break; + } + + if (max_tmds_clock) + DRM_DEBUG_KMS("VBT HDMI max TMDS clock for port %c: %d kHz\n", + port_name(port), max_tmds_clock); + info->max_tmds_clock = max_tmds_clock; + } + /* Parse the I_boost config for SKL and above */ if (bdb_version >= 196 && child->iboost) { info->dp_boost_level = translate_iboost(child->dp_iboost_level); |