The patch below does not apply to the 4.4-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 8d8bb85eb7d859aa9bbe36e588690a1d22af7608 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Tue, 12 Jul 2016 15:59:30 +0300
Subject: [PATCH] drm/i915: Program iboost settings for HDMI/DVI on SKL
MIME-Version: 1.0
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Currently we fail to program the iboost stuff for HDMI/DVI. Let's remedy
that.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: f8896f5d58e6 ("drm/i915/skl: Buffer translation improvements")
Cc: David Weinehall <david.weinehall@xxxxxxxxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/1468328376-6380-4-git-send-email-ville.syrjala@xxxxxxxxxxxxxxx
Reviewed-by: David Weinehall <david.weinehall@xxxxxxxxxxxxxxx>
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 78e1fdaec86d..09fe580dfd49 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -388,6 +388,40 @@ skl_get_buf_trans_hdmi(struct drm_i915_private *dev_priv, int *n_entries)
}
}
+static int intel_ddi_hdmi_level(struct drm_i915_private *dev_priv, enum port port)
+{
+ int n_hdmi_entries;
+ int hdmi_level;
+ int hdmi_default_entry;
+
+ hdmi_level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift;
+
+ if (IS_BROXTON(dev_priv))
+ return hdmi_level;
+
+ if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) {
+ skl_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries);
+ hdmi_default_entry = 8;
+ } else if (IS_BROADWELL(dev_priv)) {
+ n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
+ hdmi_default_entry = 7;
+ } else if (IS_HASWELL(dev_priv)) {
+ n_hdmi_entries = ARRAY_SIZE(hsw_ddi_translations_hdmi);
+ hdmi_default_entry = 6;
+ } else {
+ WARN(1, "ddi translation table missing\n");
+ n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
+ hdmi_default_entry = 7;
+ }
+
+ /* Choose a good default if VBT is badly populated */
+ if (hdmi_level == HDMI_LEVEL_SHIFT_UNKNOWN ||
+ hdmi_level >= n_hdmi_entries)
+ hdmi_level = hdmi_default_entry;
+
+ return hdmi_level;
+}
+
/*
* Starting with Haswell, DDI port buffers must be programmed with correct
* values in advance. The buffer values are different for FDI and DP modes,
@@ -399,7 +433,7 @@ void intel_prepare_ddi_buffer(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
u32 iboost_bit = 0;
- int i, n_hdmi_entries, n_dp_entries, n_edp_entries, hdmi_default_entry,
+ int i, n_hdmi_entries, n_dp_entries, n_edp_entries,
size;
int hdmi_level;
enum port port;
@@ -410,7 +444,7 @@ void intel_prepare_ddi_buffer(struct intel_encoder *encoder)
const struct ddi_buf_trans *ddi_translations;
port = intel_ddi_get_encoder_port(encoder);
- hdmi_level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift;
+ hdmi_level = intel_ddi_hdmi_level(dev_priv, port);
if (IS_BROXTON(dev_priv)) {
if (encoder->type != INTEL_OUTPUT_HDMI)
@@ -430,7 +464,6 @@ void intel_prepare_ddi_buffer(struct intel_encoder *encoder)
skl_get_buf_trans_edp(dev_priv, &n_edp_entries);
ddi_translations_hdmi =
skl_get_buf_trans_hdmi(dev_priv, &n_hdmi_entries);
- hdmi_default_entry = 8;
/* If we're boosting the current, set bit 31 of trans1 */
if (dev_priv->vbt.ddi_port_info[port].hdmi_boost_level ||
dev_priv->vbt.ddi_port_info[port].dp_boost_level)
@@ -456,7 +489,6 @@ void intel_prepare_ddi_buffer(struct intel_encoder *encoder)
n_dp_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
- hdmi_default_entry = 7;
} else if (IS_HASWELL(dev_priv)) {
ddi_translations_fdi = hsw_ddi_translations_fdi;
ddi_translations_dp = hsw_ddi_translations_dp;
@@ -464,7 +496,6 @@ void intel_prepare_ddi_buffer(struct intel_encoder *encoder)
ddi_translations_hdmi = hsw_ddi_translations_hdmi;
n_dp_entries = n_edp_entries = ARRAY_SIZE(hsw_ddi_translations_dp);
n_hdmi_entries = ARRAY_SIZE(hsw_ddi_translations_hdmi);
- hdmi_default_entry = 6;
} else {
WARN(1, "ddi translation table missing\n");
ddi_translations_edp = bdw_ddi_translations_dp;
@@ -474,7 +505,6 @@ void intel_prepare_ddi_buffer(struct intel_encoder *encoder)
n_edp_entries = ARRAY_SIZE(bdw_ddi_translations_edp);
n_dp_entries = ARRAY_SIZE(bdw_ddi_translations_dp);
n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
- hdmi_default_entry = 7;
}
switch (encoder->type) {
@@ -505,11 +535,6 @@ void intel_prepare_ddi_buffer(struct intel_encoder *encoder)
if (encoder->type != INTEL_OUTPUT_HDMI)
return;
- /* Choose a good default if VBT is badly populated */
- if (hdmi_level == HDMI_LEVEL_SHIFT_UNKNOWN ||
- hdmi_level >= n_hdmi_entries)
- hdmi_level = hdmi_default_entry;
-
/* Entry 9 is for HDMI: */
I915_WRITE(DDI_BUF_TRANS_LO(port, i),
ddi_translations_hdmi[hdmi_level].trans1 | iboost_bit);
@@ -1647,6 +1672,10 @@ static void intel_ddi_pre_enable(struct intel_encoder *intel_encoder)
intel_dp_stop_link_train(intel_dp);
} else if (type == INTEL_OUTPUT_HDMI) {
struct intel_hdmi *intel_hdmi = enc_to_intel_hdmi(encoder);
+ int level = intel_ddi_hdmi_level(dev_priv, port);
+
+ if (IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv))
+ skl_ddi_set_iboost(intel_encoder, level);
intel_hdmi->set_infoframes(encoder,
crtc->config->has_hdmi_sink,
--
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