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- Only check eDP HPD when AUX CH is shared.

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Merge tag 'drm-intel-fixes-2023-09-14' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Only check eDP HPD when AUX CH is shared.

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ZQL+NqtIZH5F/Nxr@intel.com
This commit is contained in:
Dave Airlie 2023-09-15 10:12:21 +10:00
commit c6fbd2b0ca
3 changed files with 28 additions and 1 deletions
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21
drivers/gpu/drm/i915/display/intel_bios.c
View File

@ -3540,6 +3540,27 @@ enum aux_ch intel_bios_dp_aux_ch(const struct intel_bios_encoder_data *devdata)
return map_aux_ch(devdata->i915, devdata->child.aux_channel);
}
bool intel_bios_dp_has_shared_aux_ch(const struct intel_bios_encoder_data *devdata)
{
struct drm_i915_private *i915;
u8 aux_channel;
int count = 0;
if (!devdata || !devdata->child.aux_channel)
return false;
i915 = devdata->i915;
aux_channel = devdata->child.aux_channel;
list_for_each_entry(devdata, &i915->display.vbt.display_devices, node) {
if (intel_bios_encoder_supports_dp(devdata) &&
aux_channel == devdata->child.aux_channel)
count++;
}
return count > 1;
}
int intel_bios_dp_boost_level(const struct intel_bios_encoder_data *devdata)
{
if (!devdata || devdata->i915->display.vbt.version < 196 || !devdata->child.iboost)

1
drivers/gpu/drm/i915/display/intel_bios.h
View File

@ -273,6 +273,7 @@ enum aux_ch intel_bios_dp_aux_ch(const struct intel_bios_encoder_data *devdata);
int intel_bios_dp_boost_level(const struct intel_bios_encoder_data *devdata);
int intel_bios_dp_max_lane_count(const struct intel_bios_encoder_data *devdata);
int intel_bios_dp_max_link_rate(const struct intel_bios_encoder_data *devdata);
bool intel_bios_dp_has_shared_aux_ch(const struct intel_bios_encoder_data *devdata);
int intel_bios_hdmi_boost_level(const struct intel_bios_encoder_data *devdata);
int intel_bios_hdmi_ddc_pin(const struct intel_bios_encoder_data *devdata);
int intel_bios_hdmi_level_shift(const struct intel_bios_encoder_data *devdata);

7
drivers/gpu/drm/i915/display/intel_dp.c
View File

@ -5512,8 +5512,13 @@ static bool intel_edp_init_connector(struct intel_dp *intel_dp,
/*
* VBT and straps are liars. Also check HPD as that seems
* to be the most reliable piece of information available.
*
* ... expect on devices that forgot to hook HPD up for eDP
* (eg. Acer Chromebook C710), so we'll check it only if multiple
* ports are attempting to use the same AUX CH, according to VBT.
*/
if (!intel_digital_port_connected(encoder)) {
if (intel_bios_dp_has_shared_aux_ch(encoder->devdata) &&
!intel_digital_port_connected(encoder)) {
/*
* If this fails, presume the DPCD answer came
* from some other port using the same AUX CH.