drm/i915/skl: Support for edp low_vswing param in vbt
v2: Adding VBT version check for low_vswing field, and correcting parsing
v3: (Damien)
- Restrain the scope of the 'vswing' variable
- Use the more idiomatic "ev_priv->vbt.edp_low_vswing = vswing == 0;"
instead of if (foo) var = true; else var = false;
- Shorten edp_vswing_premph_setting to edp_vswing_premph to fit in 80 chars
- Add the version from which the edp_vswing_premph field is valid in the
struct definition
Reviewed-by: Satheeshakrishna M <satheeshakrishna.m@intel.com> (v2)
Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 3f17825..c684085 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -662,6 +662,13 @@
edp_link_params->vswing);
break;
}
+
+ if (bdb->version >= 173) {
+ uint8_t vswing;
+
+ vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
+ dev_priv->vbt.edp_low_vswing = vswing == 0;
+ }
}
static void