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drm/i915: don't init DP or HDMI when not supported by DDI port

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There's no reason to init a DP connector if the encoder just supports
HDMI: we'll just waste hundreds and hundreds of cycles trying to do DP
AUX transactions to detect if there's something there. Same goes for a
DP connector that doesn't support HDMI, but I'm not sure these
actually exist.

v2: - Use bit fields
    - Remove useless identation level
    - Replace DRM_ERROR with DRM_DEBUG_KMS

Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com> (v1)
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Paulo Zanoni 2013-09-12 17:12:18 -03:00 committed by Daniel Vetter
parent 554d6af50a
commit 311a20949f
3 changed files with 32 additions and 5 deletions
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4
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1059,6 +1059,10 @@ enum modeset_restore {
struct ddi_vbt_port_info {
uint8_t hdmi_level_shift;
uint8_t supports_dvi:1;
uint8_t supports_hdmi:1;
uint8_t supports_dp:1;
};
struct intel_vbt_data {

13
drivers/gpu/drm/i915/intel_bios.c
View File

@ -632,6 +632,10 @@ static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
is_hdmi = is_dvi && (child->common.device_type & (1 << 11)) == 0;
is_edp = is_dp && (child->common.device_type & (1 << 12));
info->supports_dvi = is_dvi;
info->supports_hdmi = is_hdmi;
info->supports_dp = is_dp;
DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);
@ -792,8 +796,15 @@ init_vbt_defaults(struct drm_i915_private *dev_priv)
DRM_DEBUG_KMS("Set default to SSC at %dMHz\n", dev_priv->vbt.lvds_ssc_freq);
for (port = PORT_A; port < I915_MAX_PORTS; port++) {
struct ddi_vbt_port_info *info =
&dev_priv->vbt.ddi_port_info[port];
/* Recommended BSpec default: 800mV 0dB. */
dev_priv->vbt.ddi_port_info[port].hdmi_level_shift = 6;
info->hdmi_level_shift = 6;
info->supports_dvi = (port != PORT_A && port != PORT_E);
info->supports_hdmi = info->supports_dvi;
info->supports_dp = (port != PORT_E);
}
}

20
drivers/gpu/drm/i915/intel_ddi.c
View File

@ -1356,6 +1356,17 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
struct drm_encoder *encoder;
struct intel_connector *hdmi_connector = NULL;
struct intel_connector *dp_connector = NULL;
bool init_hdmi, init_dp;
init_hdmi = (dev_priv->vbt.ddi_port_info[port].supports_dvi ||
dev_priv->vbt.ddi_port_info[port].supports_hdmi);
init_dp = dev_priv->vbt.ddi_port_info[port].supports_dp;
if (!init_dp && !init_hdmi) {
DRM_DEBUG_KMS("VBT says port %c is not DVI/HDMI/DP compatible\n",
port_name(port));
init_hdmi = true;
init_dp = true;
}
intel_dig_port = kzalloc(sizeof(*intel_dig_port), GFP_KERNEL);
if (!intel_dig_port)
@ -1393,19 +1404,20 @@ void intel_ddi_init(struct drm_device *dev, enum port port)
intel_encoder->cloneable = false;
intel_encoder->hot_plug = intel_ddi_hot_plug;
if (!intel_dp_init_connector(intel_dig_port, dp_connector)) {
if (init_dp && !intel_dp_init_connector(intel_dig_port, dp_connector)) {
drm_encoder_cleanup(encoder);
kfree(intel_dig_port);
kfree(dp_connector);
return;
}
if (intel_encoder->type != INTEL_OUTPUT_EDP) {
/* In theory we don't need the encoder->type check, but leave it just in
* case we have some really bad VBTs... */
if (intel_encoder->type != INTEL_OUTPUT_EDP && init_hdmi) {
hdmi_connector = kzalloc(sizeof(*hdmi_connector),
GFP_KERNEL);
if (!hdmi_connector) {
if (!hdmi_connector)
return;
}
intel_dig_port->hdmi.hdmi_reg = DDI_BUF_CTL(port);
intel_hdmi_init_connector(intel_dig_port, hdmi_connector);