From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ville =?iso-8859-1?Q?Syrj=E4l=E4?= Subject: Re: [PATCH v2 4/4] drm/i915: Determine DP++ type 1 DVI adaptor presence based on VBT Date: Wed, 4 May 2016 14:29:22 +0300 Message-ID: <20160504112922.GN4329@intel.com> References: <1462216105-20881-1-git-send-email-ville.syrjala@linux.intel.com> <1462216105-20881-5-git-send-email-ville.syrjala@linux.intel.com> <5729CDE9.9040800@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <5729CDE9.9040800@intel.com> Sender: stable-owner@vger.kernel.org To: "Sharma, Shashank" Cc: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, stable@vger.kernel.org, Tore Anderson , Paulo Zanoni , Daniel Vetter List-Id: intel-gfx@lists.freedesktop.org On Wed, May 04, 2016 at 03:54:41PM +0530, Sharma, Shashank wrote: >=20 >=20 > On 5/3/2016 12:38 AM, ville.syrjala@linux.intel.com wrote: > > From: Ville Syrj=E4l=E4 > > > > DP dual mode type 1 DVI adaptors aren't required to implement any > > registers, so it's a bit hard to detect them. The best way would > > be to check the state of the CONFIG1 pin, but we have no way to > > do that. So as a last resort, check the VBT to see if the HDMI > > port is in fact a dual mode capable DP port. > > > > v2: Deal with VBT code reorganization > > Deal with DRM_DP_DUAL_MODE_UNKNOWN > > Reduce DEVICE_TYPE_DP_DUAL_MODE_BITS a bit > > Accept both DP and HDMI dvo_port in VBT as my BSW > > at least declare its DP port as HDMI :( > > > > Cc: stable@vger.kernel.org > > Cc: Tore Anderson > > Reported-by: Tore Anderson > > Fixes: 7a0baa623446 ("Revert "drm/i915: Disable 12bpc hdmi for now"= ") > > Cc: Paulo Zanoni > > Cc: Shashank Sharma > > Cc: Daniel Vetter > > Signed-off-by: Ville Syrj=E4l=E4 > > --- > > drivers/gpu/drm/i915/i915_drv.h | 1 + > > drivers/gpu/drm/i915/intel_bios.c | 36 ++++++++++++++++++++++= +++++++++++++ > > drivers/gpu/drm/i915/intel_hdmi.c | 30 ++++++++++++++++++++++= +++---- > > drivers/gpu/drm/i915/intel_vbt_defs.h | 13 +++++++++++++ > > 4 files changed, 76 insertions(+), 4 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915= /i915_drv.h > > index ff6aaf0c4e1e..abe43922a08f 100644 > > --- a/drivers/gpu/drm/i915/i915_drv.h > > +++ b/drivers/gpu/drm/i915/i915_drv.h > > @@ -3489,6 +3489,7 @@ bool intel_bios_is_valid_vbt(const void *buf,= size_t size); > > bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv); > > bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv= , u8 *i2c_pin); > > bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, en= um port port); > > +bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_= priv, enum port port); > > bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv,= enum port *port); > > bool intel_bios_is_port_hpd_inverted(struct drm_i915_private *dev= _priv, > > enum port port); > > diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i9= 15/intel_bios.c > > index 81518116e00d..8b68c4882fba 100644 > > --- a/drivers/gpu/drm/i915/intel_bios.c > > +++ b/drivers/gpu/drm/i915/intel_bios.c > > @@ -1597,6 +1597,42 @@ bool intel_bios_is_port_edp(struct drm_i915_= private *dev_priv, enum port port) > > return false; > > } > > > > +bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_= priv, enum port port) > > +{ > > + static const struct { > > + u16 dp, hdmi; > > + } port_mapping[] =3D { > > + /* > > + * Buggy VBTs may declare DP ports as having > > + * HDMI type dvo_port :( So let's check both. > > + */ > > + [PORT_B] =3D { DVO_PORT_DPB, DVO_PORT_HDMIB, }, > > + [PORT_C] =3D { DVO_PORT_DPC, DVO_PORT_HDMIC, }, > > + [PORT_D] =3D { DVO_PORT_DPD, DVO_PORT_HDMID, }, > > + [PORT_E] =3D { DVO_PORT_DPE, DVO_PORT_HDMIE, }, > > + }; > > + int i; > > + > > + if (port =3D=3D PORT_A || port >=3D ARRAY_SIZE(port_mapping)) > > + return false; > > + > > + if (!dev_priv->vbt.child_dev_num) > > + return false; > > + > > + for (i =3D 0; i < dev_priv->vbt.child_dev_num; i++) { > > + const union child_device_config *p_child =3D > > + &dev_priv->vbt.child_dev[i]; > > + > > + if ((p_child->common.dvo_port =3D=3D port_mapping[port].dp || > > + p_child->common.dvo_port =3D=3D port_mapping[port].hdmi) && > > + (p_child->common.device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS= ) =3D=3D > > + (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS)) > > + return true; > > + } > > + > > + return false; > > +} > > + > > /** > > * intel_bios_is_dsi_present - is DSI present in VBT > > * @dev_priv: i915 device instance > > diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i9= 15/intel_hdmi.c > > index c4d93e6b4bed..6b52c6accf6a 100644 > > --- a/drivers/gpu/drm/i915/intel_hdmi.c > > +++ b/drivers/gpu/drm/i915/intel_hdmi.c > > @@ -1396,16 +1396,38 @@ intel_hdmi_unset_edid(struct drm_connector = *connector) > > } > > > > static void > > -intel_hdmi_dp_dual_mode_detect(struct drm_connector *connector) > > +intel_hdmi_dp_dual_mode_detect(struct drm_connector *connector, bo= ol has_edid) > > { > > struct drm_i915_private *dev_priv =3D to_i915(connector->dev); > > struct intel_hdmi *hdmi =3D intel_attached_hdmi(connector); > > + enum port port =3D hdmi_to_dig_port(hdmi)->port; > > struct i2c_adapter *adapter =3D > > intel_gmbus_get_adapter(dev_priv, hdmi->ddc_bus); > > enum drm_dp_dual_mode_type type =3D drm_dp_dual_mode_detect(adap= ter); > > > > - if (type =3D=3D DRM_DP_DUAL_MODE_NONE || > > - type =3D=3D DRM_DP_DUAL_MODE_UNKNOWN) > > + /* > > + * Type 1 DVI adaptors are not required to implement any > > + * registers, so we can't always detect their presence. > > + * Ideally we should be able to check the state of the > > + * CONFIG1 pin, but no such luck on our hardware. > > + * > > + * The only method left to us is to check the VBT to see > > + * if the port is a dual mode capable DP port. But let's > > + * only do that when we sucesfully read the EDID, to avoid > > + * confusing log messages about DP dual mode adaptors when > > + * there's nothing connected to the port. > > + */ > > + if (type =3D=3D DRM_DP_DUAL_MODE_UNKNOWN) { > > + if (has_edid && > > + intel_bios_is_port_dp_dual_mode(dev_priv, port)) { > > + DRM_DEBUG_KMS("Assuming DP dual mode adaptor presence based on = VBT\n"); > > + type =3D DRM_DP_DUAL_MODE_TYPE1_DVI; > > + } else { > > + type =3D DRM_DP_DUAL_MODE_NONE; > > + } > > + } > > + > > + if (type =3D=3D DRM_DP_DUAL_MODE_NONE) > > return; > > > > hdmi->dp_dual_mode.type =3D type; > > @@ -1432,7 +1454,7 @@ intel_hdmi_set_edid(struct drm_connector *con= nector, bool force) > > intel_gmbus_get_adapter(dev_priv, > > intel_hdmi->ddc_bus)); > > > > - intel_hdmi_dp_dual_mode_detect(connector); > > + intel_hdmi_dp_dual_mode_detect(connector, edid !=3D NULL); > > > > intel_display_power_put(dev_priv, POWER_DOMAIN_GMBUS); > > } > > diff --git a/drivers/gpu/drm/i915/intel_vbt_defs.h b/drivers/gpu/dr= m/i915/intel_vbt_defs.h > > index a4a42f254c35..b1019e01e51d 100644 > > --- a/drivers/gpu/drm/i915/intel_vbt_defs.h > > +++ b/drivers/gpu/drm/i915/intel_vbt_defs.h > > @@ -746,6 +746,7 @@ struct bdb_psr { > > #define DEVICE_TYPE_INT_TV 0x1009 > > #define DEVICE_TYPE_HDMI 0x60D2 > > #define DEVICE_TYPE_DP 0x68C6 > > +#define DEVICE_TYPE_DP_DUAL_MODE 0x60D6 > > #define DEVICE_TYPE_eDP 0x78C6 > > > > #define DEVICE_TYPE_CLASS_EXTENSION (1 << 15) > > @@ -780,6 +781,18 @@ struct bdb_psr { > > DEVICE_TYPE_DISPLAYPORT_OUTPUT | \ > > DEVICE_TYPE_ANALOG_OUTPUT) > > > > +#define DEVICE_TYPE_DP_DUAL_MODE_BITS \ > > + (DEVICE_TYPE_INTERNAL_CONNECTOR | \ > > + DEVICE_TYPE_NOT_HDMI_OUTPUT | \ > Why do we need this one ? Shouldn't the others cover all the cases ? > Is there a special case in your mind ? Doh. That bit shouldn't be here. It's the only bit I was ignoring in the previous version, and definitely we should ignore it still. I'll send out a v3. Good catch there. >=20 > Regards > Shashank > > + DEVICE_TYPE_MIPI_OUTPUT | \ > > + DEVICE_TYPE_COMPOSITE_OUTPUT | \ > > + DEVICE_TYPE_LVDS_SINGALING | \ > > + DEVICE_TYPE_TMDS_DVI_SIGNALING | \ > > + DEVICE_TYPE_VIDEO_SIGNALING | \ > > + DEVICE_TYPE_DISPLAYPORT_OUTPUT | \ > > + DEVICE_TYPE_DIGITAL_OUTPUT | \ > > + DEVICE_TYPE_ANALOG_OUTPUT) > > + > > /* define the DVO port for HDMI output type */ > > #define DVO_B 1 > > #define DVO_C 2 > > --=20 Ville Syrj=E4l=E4 Intel OTC