From e13e2b2c468bc54e872ad68126411d6a3f77001a Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Tue, 6 May 2014 14:56:51 +0300 Subject: [PATCH] drm/i915: clean up VBT eDP link param decoding Use defines, do not set anything if VBT has values unknown to us. Reviewed-by: Damien Lespiau Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/intel_bios.c | 52 ++++++++++++++++++++++--------- 1 file changed, 38 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index fa486c5fbb02..aff4a113cda3 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -560,47 +560,71 @@ parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb) dev_priv->vbt.edp_pps = *edp_pps; - dev_priv->vbt.edp_rate = edp_link_params->rate ? DP_LINK_BW_2_7 : - DP_LINK_BW_1_62; + switch (edp_link_params->rate) { + case EDP_RATE_1_62: + dev_priv->vbt.edp_rate = DP_LINK_BW_1_62; + break; + case EDP_RATE_2_7: + dev_priv->vbt.edp_rate = DP_LINK_BW_2_7; + break; + default: + DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n", + edp_link_params->rate); + break; + } + switch (edp_link_params->lanes) { - case 0: + case EDP_LANE_1: dev_priv->vbt.edp_lanes = 1; break; - case 1: + case EDP_LANE_2: dev_priv->vbt.edp_lanes = 2; break; - case 3: - default: + case EDP_LANE_4: dev_priv->vbt.edp_lanes = 4; break; + default: + DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n", + edp_link_params->lanes); + break; } + switch (edp_link_params->preemphasis) { - case 0: + case EDP_PREEMPHASIS_NONE: dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_0; break; - case 1: + case EDP_PREEMPHASIS_3_5dB: dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_3_5; break; - case 2: + case EDP_PREEMPHASIS_6dB: dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_6; break; - case 3: + case EDP_PREEMPHASIS_9_5dB: dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPHASIS_9_5; break; + default: + DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n", + edp_link_params->preemphasis); + break; } + switch (edp_link_params->vswing) { - case 0: + case EDP_VSWING_0_4V: dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_400; break; - case 1: + case EDP_VSWING_0_6V: dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_600; break; - case 2: + case EDP_VSWING_0_8V: dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_800; break; - case 3: + case EDP_VSWING_1_2V: dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_1200; break; + default: + DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n", + edp_link_params->vswing); + break; } } -- 2.30.2