/*
* Starting with Haswell, DDI port buffers must be programmed with correct
* values in advance. The buffer values are different for FDI and DP modes,
* but the HDMI/DVI fields are shared among those. So we program the DDI
* in either FDI or DP modes only, as HDMI connections will work with both
* of those
*/
static void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 reg;
int i;
int hdmi_level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift;
const u32 *ddi_translations_fdi;
const u32 *ddi_translations_dp;
const u32 *ddi_translations_edp;
const u32 *ddi_translations;
if (IS_BROADWELL(dev)) {
ddi_translations_fdi = bdw_ddi_translations_fdi;
ddi_translations_dp = bdw_ddi_translations_dp;
ddi_translations_edp = bdw_ddi_translations_edp;
} else if (IS_HASWELL(dev)) {
ddi_translations_fdi = hsw_ddi_translations_fdi;
ddi_translations_dp = hsw_ddi_translations_dp;
ddi_translations_edp = hsw_ddi_translations_dp;
} else {
WARN(1, "ddi translation table missing\n");
ddi_translations_edp = bdw_ddi_translations_dp;
ddi_translations_fdi = bdw_ddi_translations_fdi;
ddi_translations_dp = bdw_ddi_translations_dp;
}
switch (port) {
case PORT_A:
ddi_translations = ddi_translations_edp;
break;
case PORT_B:
case PORT_C:
ddi_translations = ddi_translations_dp;
break;
case PORT_D:
if (intel_dp_is_edp(dev, PORT_D))
ddi_translations = ddi_translations_edp;
else
ddi_translations = ddi_translations_dp;
break;
case PORT_E:
ddi_translations = ddi_translations_fdi;
break;
default:
BUG();
}
for (i = 0, reg = DDI_BUF_TRANS(port);
i < ARRAY_SIZE(hsw_ddi_translations_fdi); i++) {
I915_WRITE(reg, ddi_translations[i]);
reg += 4;
}
/* Entry 9 is for HDMI: */
for (i = 0; i < 2; i++) {
I915_WRITE(reg, hsw_ddi_translations_hdmi[hdmi_level * 2 + i]);
reg += 4;
}
}
/*
* Starting with Haswell, DDI port buffers must be programmed with correct
* values in advance. The buffer values are different for FDI and DP modes,
* but the HDMI/DVI fields are shared among those. So we program the DDI
* in either FDI or DP modes only, as HDMI connections will work with both
* of those
*/
static void intel_prepare_ddi_buffers(struct drm_device *dev, enum port port)
{
struct drm_i915_private *dev_priv = dev->dev_private;
u32 reg;
int i, n_hdmi_entries, hdmi_800mV_0dB;
int hdmi_level = dev_priv->vbt.ddi_port_info[port].hdmi_level_shift;
const u32 *ddi_translations_fdi;
const u32 *ddi_translations_dp;
const u32 *ddi_translations_edp;
const u32 *ddi_translations_hdmi;
const u32 *ddi_translations;
if (IS_BROADWELL(dev)) {
ddi_translations_fdi = bdw_ddi_translations_fdi;
ddi_translations_dp = bdw_ddi_translations_dp;
ddi_translations_edp = bdw_ddi_translations_edp;
ddi_translations_hdmi = bdw_ddi_translations_hdmi;
n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
hdmi_800mV_0dB = 7;
} else if (IS_HASWELL(dev)) {
ddi_translations_fdi = hsw_ddi_translations_fdi;
ddi_translations_dp = hsw_ddi_translations_dp;
ddi_translations_edp = hsw_ddi_translations_dp;
ddi_translations_hdmi = hsw_ddi_translations_hdmi;
n_hdmi_entries = ARRAY_SIZE(hsw_ddi_translations_hdmi);
hdmi_800mV_0dB = 6;
} else {
WARN(1, "ddi translation table missing\n");
ddi_translations_edp = bdw_ddi_translations_dp;
ddi_translations_fdi = bdw_ddi_translations_fdi;
ddi_translations_dp = bdw_ddi_translations_dp;
ddi_translations_hdmi = bdw_ddi_translations_hdmi;
n_hdmi_entries = ARRAY_SIZE(bdw_ddi_translations_hdmi);
hdmi_800mV_0dB = 7;
}
switch (port) {
case PORT_A:
ddi_translations = ddi_translations_edp;
break;
case PORT_B:
case PORT_C:
ddi_translations = ddi_translations_dp;
break;
case PORT_D:
if (intel_dp_is_edp(dev, PORT_D))
ddi_translations = ddi_translations_edp;
else
ddi_translations = ddi_translations_dp;
break;
case PORT_E:
ddi_translations = ddi_translations_fdi;
break;
default:
BUG();
}
for (i = 0, reg = DDI_BUF_TRANS(port);
i < ARRAY_SIZE(hsw_ddi_translations_fdi); i++) {
I915_WRITE(reg, ddi_translations[i]);
reg += 4;
}
/* Choose a good default if VBT is badly populated */
if (hdmi_level == HDMI_LEVEL_SHIFT_UNKNOWN ||
hdmi_level >= n_hdmi_entries)
hdmi_level = hdmi_800mV_0dB;
/* Entry 9 is for HDMI: */
for (i = 0; i < 2; i++) {
I915_WRITE(reg, ddi_translations_hdmi[hdmi_level * 2 + i]);
reg += 4;
}
}
