| Message ID | 20201023122112.15265-7-anshuman.gupta@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | HDCP 2.2 and HDCP 1.4 Gen12 DP MST support | expand |
> -----Original Message----- > From: Anshuman Gupta <anshuman.gupta@intel.com> > Sent: Friday, October 23, 2020 5:51 PM > To: intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org > Cc: seanpaul@chromium.org; Nikula, Jani <jani.nikula@intel.com>; C, > Ramalingam <ramalingam.c@intel.com>; Li, Juston <juston.li@intel.com>; > Shankar, Uma <uma.shankar@intel.com>; Gupta, Anshuman > <anshuman.gupta@intel.com> > Subject: [PATCH v3 06/16] drm/i915/hdcp: HDCP stream encryption support > > Both HDCP_{1.x,2.x} requires to select/deselect Multistream HDCP bit in > TRANS_DDI_FUNC_CTL in order to enable/disable stream HDCP encryption over > DP MST Transport Link. > > HDCP 1.4 stream encryption requires to validate the stream encryption status in > HDCP_STATUS_{TRANSCODER,PORT} register driving that link in order to > enable/disable the stream encryption. > > Both of above requirement are same for all Gen with respect to B.Spec > Documentation. > Cc: Ramalingam C <ramalingam.c@intel.com> > Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> > --- > drivers/gpu/drm/i915/display/intel_ddi.c | 10 +-- > drivers/gpu/drm/i915/display/intel_ddi.h | 6 +- > .../drm/i915/display/intel_display_types.h | 4 + > drivers/gpu/drm/i915/display/intel_dp_hdcp.c | 80 ++++++++++++++++--- > drivers/gpu/drm/i915/display/intel_hdmi.c | 14 ++-- > drivers/gpu/drm/i915/i915_reg.h | 1 + > 6 files changed, 90 insertions(+), 25 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c > b/drivers/gpu/drm/i915/display/intel_ddi.c > index bf8730267cfd..fbeffdfd1a0d 100644 > --- a/drivers/gpu/drm/i915/display/intel_ddi.c > +++ b/drivers/gpu/drm/i915/display/intel_ddi.c > @@ -1948,9 +1948,9 @@ void intel_ddi_disable_transcoder_func(const struct > intel_crtc_state *crtc_state > } > } > > -int intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder, > - enum transcoder cpu_transcoder, > - bool enable) > +int intel_ddi_toggle_hdcp_bits(struct intel_encoder *intel_encoder, > + enum transcoder cpu_transcoder, > + bool enable, u32 hdcp_mask) > { > struct drm_device *dev = intel_encoder->base.dev; > struct drm_i915_private *dev_priv = to_i915(dev); @@ -1965,9 +1965,9 > @@ int intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder, > > tmp = intel_de_read(dev_priv, TRANS_DDI_FUNC_CTL(cpu_transcoder)); > if (enable) > - tmp |= TRANS_DDI_HDCP_SIGNALLING; > + tmp |= hdcp_mask; > else > - tmp &= ~TRANS_DDI_HDCP_SIGNALLING; > + tmp &= ~hdcp_mask; > intel_de_write(dev_priv, TRANS_DDI_FUNC_CTL(cpu_transcoder), tmp); > intel_display_power_put(dev_priv, intel_encoder->power_domain, > wakeref); > return ret; > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.h > b/drivers/gpu/drm/i915/display/intel_ddi.h > index dcc711cfe4fe..a4dd815c0000 100644 > --- a/drivers/gpu/drm/i915/display/intel_ddi.h > +++ b/drivers/gpu/drm/i915/display/intel_ddi.h > @@ -50,9 +50,9 @@ u32 bxt_signal_levels(struct intel_dp *intel_dp, > const struct intel_crtc_state *crtc_state); > u32 ddi_signal_levels(struct intel_dp *intel_dp, > const struct intel_crtc_state *crtc_state); -int > intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder, > - enum transcoder cpu_transcoder, > - bool enable); > +int intel_ddi_toggle_hdcp_bits(struct intel_encoder *intel_encoder, > + enum transcoder cpu_transcoder, > + bool enable, u32 hdcp_mask); > void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder); > > #endif /* __INTEL_DDI_H__ */ > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h > b/drivers/gpu/drm/i915/display/intel_display_types.h > index c47124a679b6..59b8fc21e3e8 100644 > --- a/drivers/gpu/drm/i915/display/intel_display_types.h > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h > @@ -339,6 +339,10 @@ struct intel_hdcp_shim { > enum transcoder cpu_transcoder, > bool enable); > > + /* Enable/Disable stream encryption on DP MST Transport Link */ > + int (*stream_encryption)(struct intel_digital_port *dig_port, > + bool enable); > + > /* Ensures the link is still protected */ > bool (*check_link)(struct intel_digital_port *dig_port, > struct intel_connector *connector); diff --git > a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c > b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c > index 03424d20e9f7..652d4645f255 100644 > --- a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c > +++ b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c > @@ -16,6 +16,30 @@ > #include "intel_dp.h" > #include "intel_hdcp.h" > > +static unsigned int transcoder_to_stream_enc_status(enum transcoder > +cpu_transcoder) { > + u32 stream_enc_mask; > + > + switch (cpu_transcoder) { > + case TRANSCODER_A: > + stream_enc_mask = HDCP_STATUS_STREAM_A_ENC; > + break; > + case TRANSCODER_B: > + stream_enc_mask = HDCP_STATUS_STREAM_B_ENC; > + break; > + case TRANSCODER_C: > + stream_enc_mask = HDCP_STATUS_STREAM_C_ENC; > + break; > + case TRANSCODER_D: > + stream_enc_mask = HDCP_STATUS_STREAM_D_ENC; > + break; > + default: > + stream_enc_mask = 0; > + } > + > + return stream_enc_mask; > +} > + > static void intel_dp_hdcp_wait_for_cp_irq(struct intel_hdcp *hdcp, int timeout) > { > long ret; > @@ -622,24 +646,57 @@ static const struct intel_hdcp_shim > intel_dp_hdcp_shim = { }; > > static int > -intel_dp_mst_hdcp_toggle_signalling(struct intel_digital_port *dig_port, > - enum transcoder cpu_transcoder, > - bool enable) > +intel_dp_mst_toggle_select_hdcp_stream(struct intel_digital_port *dig_port, > + bool enable) I feel ....toggle_hdcp_stream_select will look better. > { > struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); > + struct intel_dp *dp = &dig_port->dp; > + struct intel_hdcp *hdcp = &dp->attached_connector->hdcp; > int ret; > > - if (!enable) > - usleep_range(6, 60); /* Bspec says >= 6us */ Should we not keep this delay. > - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, > - cpu_transcoder, enable); > + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, > + hdcp->stream_transcoder, enable, > + TRANS_DDI_HDCP_SELECT); > if (ret) > - drm_dbg_kms(&i915->drm, "%s HDCP signalling failed (%d)\n", > - enable ? "Enable" : "Disable", ret); > + drm_err(&i915->drm, "%s Multistream HDCP select failed This print doesn't sound good, refine it. > (%d)\n", > + enable ? "Enable" : "Disable", ret); > return ret; > } > > +static int > +intel_dp_mst_hdcp_strem_encryption(struct intel_digital_port *dig_port, > + bool enable) > +{ > + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); > + struct intel_dp *dp = &dig_port->dp; > + struct intel_hdcp *hdcp = &dp->attached_connector->hdcp; > + enum port port = dig_port->base.port; > + enum transcoder cpu_transcoder = hdcp->cpu_transcoder; > + u32 stream_enc_status; > + int ret; > + > + ret = intel_dp_mst_toggle_select_hdcp_stream(dig_port, enable); > + if (ret) > + return ret; > + > + stream_enc_status = transcoder_to_stream_enc_status(hdcp- > >stream_transcoder); > + if (!stream_enc_status) > + return -EINVAL; > + > + /* Wait for encryption confirmation */ > + if (intel_de_wait_for_register(i915, > + HDCP_STATUS(i915, cpu_transcoder, port), > + stream_enc_status, > + enable ? stream_enc_status : 0, > + > HDCP_ENCRYPT_STATUS_CHANGE_TIMEOUT_MS)) { > + drm_err(&i915->drm, "Timed out waiting for stream encryption > %s\n", > + enable ? "enabled" : "disabled"); > + return -ETIMEDOUT; > + } > + > + return 0; > +} > + > static > bool intel_dp_mst_hdcp_check_link(struct intel_digital_port *dig_port, > struct intel_connector *connector) @@ -673,7 > +730,8 @@ static const struct intel_hdcp_shim intel_dp_mst_hdcp_shim = { > .read_ksv_ready = intel_dp_hdcp_read_ksv_ready, > .read_ksv_fifo = intel_dp_hdcp_read_ksv_fifo, > .read_v_prime_part = intel_dp_hdcp_read_v_prime_part, > - .toggle_signalling = intel_dp_mst_hdcp_toggle_signalling, > + .toggle_signalling = intel_dp_hdcp_toggle_signalling, > + .stream_encryption = intel_dp_mst_hdcp_strem_encryption, Typo in stream. > .check_link = intel_dp_mst_hdcp_check_link, > .hdcp_capable = intel_dp_hdcp_capable, > > diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c > b/drivers/gpu/drm/i915/display/intel_hdmi.c > index f90838bc74fb..f58469226694 100644 > --- a/drivers/gpu/drm/i915/display/intel_hdmi.c > +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c > @@ -1495,15 +1495,16 @@ static int kbl_repositioning_enc_en_signal(struct > intel_connector *connector, > usleep_range(25, 50); > } > > - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, cpu_transcoder, > - false); > + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, cpu_transcoder, > + false, TRANS_DDI_HDCP_SIGNALLING); > if (ret) { > drm_err(&dev_priv->drm, > "Disable HDCP signalling failed (%d)\n", ret); > return ret; > } > - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, cpu_transcoder, > - true); > + > + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, cpu_transcoder, > + true, TRANS_DDI_HDCP_SIGNALLING); > if (ret) { > drm_err(&dev_priv->drm, > "Enable HDCP signalling failed (%d)\n", ret); @@ -1526,8 > +1527,9 @@ int intel_hdmi_hdcp_toggle_signalling(struct intel_digital_port > *dig_port, > if (!enable) > usleep_range(6, 60); /* Bspec says >= 6us */ > > - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, cpu_transcoder, > - enable); > + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, > + cpu_transcoder, enable, > + TRANS_DDI_HDCP_SIGNALLING); > if (ret) { > drm_err(&dev_priv->drm, "%s HDCP signalling failed (%d)\n", > enable ? "Enable" : "Disable", ret); diff --git > a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index > d4952c9875fb..86a9a5145e47 100644 > --- a/drivers/gpu/drm/i915/i915_reg.h > +++ b/drivers/gpu/drm/i915/i915_reg.h > @@ -9970,6 +9970,7 @@ enum skl_power_gate { > #define TRANS_DDI_DP_VC_PAYLOAD_ALLOC (1 << 8) > #define TRANS_DDI_HDMI_SCRAMBLER_CTS_ENABLE (1 << 7) #define > TRANS_DDI_HDMI_SCRAMBLER_RESET_FREQ (1 << 6) > +#define TRANS_DDI_HDCP_SELECT REG_BIT(5) > #define TRANS_DDI_BFI_ENABLE (1 << 4) > #define TRANS_DDI_HIGH_TMDS_CHAR_RATE (1 << 4) > #define TRANS_DDI_HDMI_SCRAMBLING (1 << 0) > -- > 2.26.2
On 2020-10-27 at 11:50:13 +0530, Shankar, Uma wrote: > > > > -----Original Message----- > > From: Anshuman Gupta <anshuman.gupta@intel.com> > > Sent: Friday, October 23, 2020 5:51 PM > > To: intel-gfx@lists.freedesktop.org; dri-devel@lists.freedesktop.org > > Cc: seanpaul@chromium.org; Nikula, Jani <jani.nikula@intel.com>; C, > > Ramalingam <ramalingam.c@intel.com>; Li, Juston <juston.li@intel.com>; > > Shankar, Uma <uma.shankar@intel.com>; Gupta, Anshuman > > <anshuman.gupta@intel.com> > > Subject: [PATCH v3 06/16] drm/i915/hdcp: HDCP stream encryption support > > > > Both HDCP_{1.x,2.x} requires to select/deselect Multistream HDCP bit in > > TRANS_DDI_FUNC_CTL in order to enable/disable stream HDCP encryption over > > DP MST Transport Link. > > > > HDCP 1.4 stream encryption requires to validate the stream encryption status in > > HDCP_STATUS_{TRANSCODER,PORT} register driving that link in order to > > enable/disable the stream encryption. > > > > Both of above requirement are same for all Gen with respect to B.Spec > > Documentation. > > Cc: Ramalingam C <ramalingam.c@intel.com> > > Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> > > --- > > drivers/gpu/drm/i915/display/intel_ddi.c | 10 +-- > > drivers/gpu/drm/i915/display/intel_ddi.h | 6 +- > > .../drm/i915/display/intel_display_types.h | 4 + > > drivers/gpu/drm/i915/display/intel_dp_hdcp.c | 80 ++++++++++++++++--- > > drivers/gpu/drm/i915/display/intel_hdmi.c | 14 ++-- > > drivers/gpu/drm/i915/i915_reg.h | 1 + > > 6 files changed, 90 insertions(+), 25 deletions(-) > > > > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c > > b/drivers/gpu/drm/i915/display/intel_ddi.c > > index bf8730267cfd..fbeffdfd1a0d 100644 > > --- a/drivers/gpu/drm/i915/display/intel_ddi.c > > +++ b/drivers/gpu/drm/i915/display/intel_ddi.c > > @@ -1948,9 +1948,9 @@ void intel_ddi_disable_transcoder_func(const struct > > intel_crtc_state *crtc_state > > } > > } > > > > -int intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder, > > - enum transcoder cpu_transcoder, > > - bool enable) > > +int intel_ddi_toggle_hdcp_bits(struct intel_encoder *intel_encoder, > > + enum transcoder cpu_transcoder, > > + bool enable, u32 hdcp_mask) > > { > > struct drm_device *dev = intel_encoder->base.dev; > > struct drm_i915_private *dev_priv = to_i915(dev); @@ -1965,9 +1965,9 > > @@ int intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder, > > > > tmp = intel_de_read(dev_priv, TRANS_DDI_FUNC_CTL(cpu_transcoder)); > > if (enable) > > - tmp |= TRANS_DDI_HDCP_SIGNALLING; > > + tmp |= hdcp_mask; > > else > > - tmp &= ~TRANS_DDI_HDCP_SIGNALLING; > > + tmp &= ~hdcp_mask; > > intel_de_write(dev_priv, TRANS_DDI_FUNC_CTL(cpu_transcoder), tmp); > > intel_display_power_put(dev_priv, intel_encoder->power_domain, > > wakeref); > > return ret; > > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.h > > b/drivers/gpu/drm/i915/display/intel_ddi.h > > index dcc711cfe4fe..a4dd815c0000 100644 > > --- a/drivers/gpu/drm/i915/display/intel_ddi.h > > +++ b/drivers/gpu/drm/i915/display/intel_ddi.h > > @@ -50,9 +50,9 @@ u32 bxt_signal_levels(struct intel_dp *intel_dp, > > const struct intel_crtc_state *crtc_state); > > u32 ddi_signal_levels(struct intel_dp *intel_dp, > > const struct intel_crtc_state *crtc_state); -int > > intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder, > > - enum transcoder cpu_transcoder, > > - bool enable); > > +int intel_ddi_toggle_hdcp_bits(struct intel_encoder *intel_encoder, > > + enum transcoder cpu_transcoder, > > + bool enable, u32 hdcp_mask); > > void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder); > > > > #endif /* __INTEL_DDI_H__ */ > > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h > > b/drivers/gpu/drm/i915/display/intel_display_types.h > > index c47124a679b6..59b8fc21e3e8 100644 > > --- a/drivers/gpu/drm/i915/display/intel_display_types.h > > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h > > @@ -339,6 +339,10 @@ struct intel_hdcp_shim { > > enum transcoder cpu_transcoder, > > bool enable); > > > > + /* Enable/Disable stream encryption on DP MST Transport Link */ > > + int (*stream_encryption)(struct intel_digital_port *dig_port, > > + bool enable); > > + > > /* Ensures the link is still protected */ > > bool (*check_link)(struct intel_digital_port *dig_port, > > struct intel_connector *connector); diff --git > > a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c > > b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c > > index 03424d20e9f7..652d4645f255 100644 > > --- a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c > > +++ b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c > > @@ -16,6 +16,30 @@ > > #include "intel_dp.h" > > #include "intel_hdcp.h" > > > > +static unsigned int transcoder_to_stream_enc_status(enum transcoder > > +cpu_transcoder) { > > + u32 stream_enc_mask; > > + > > + switch (cpu_transcoder) { > > + case TRANSCODER_A: > > + stream_enc_mask = HDCP_STATUS_STREAM_A_ENC; > > + break; > > + case TRANSCODER_B: > > + stream_enc_mask = HDCP_STATUS_STREAM_B_ENC; > > + break; > > + case TRANSCODER_C: > > + stream_enc_mask = HDCP_STATUS_STREAM_C_ENC; > > + break; > > + case TRANSCODER_D: > > + stream_enc_mask = HDCP_STATUS_STREAM_D_ENC; > > + break; > > + default: > > + stream_enc_mask = 0; > > + } > > + > > + return stream_enc_mask; > > +} > > + > > static void intel_dp_hdcp_wait_for_cp_irq(struct intel_hdcp *hdcp, int timeout) > > { > > long ret; > > @@ -622,24 +646,57 @@ static const struct intel_hdcp_shim > > intel_dp_hdcp_shim = { }; > > > > static int > > -intel_dp_mst_hdcp_toggle_signalling(struct intel_digital_port *dig_port, > > - enum transcoder cpu_transcoder, > > - bool enable) > > +intel_dp_mst_toggle_select_hdcp_stream(struct intel_digital_port *dig_port, > > + bool enable) > > I feel ....toggle_hdcp_stream_select will look better. > > > { > > struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); > > + struct intel_dp *dp = &dig_port->dp; > > + struct intel_hdcp *hdcp = &dp->attached_connector->hdcp; > > int ret; > > > > - if (!enable) > > - usleep_range(6, 60); /* Bspec says >= 6us */ > > Should we not keep this delay. Thanks for comment. As per B.Spec:49289 this delay only requires for HDMI/DVI panel while toggling HDCP signalling. I will fix other comments on this patch. Thanks, Anshuman. > > > - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, > > - cpu_transcoder, enable); > > + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, > > + hdcp->stream_transcoder, enable, > > + TRANS_DDI_HDCP_SELECT); > > if (ret) > > - drm_dbg_kms(&i915->drm, "%s HDCP signalling failed (%d)\n", > > - enable ? "Enable" : "Disable", ret); > > + drm_err(&i915->drm, "%s Multistream HDCP select failed > > This print doesn't sound good, refine it. > > > (%d)\n", > > + enable ? "Enable" : "Disable", ret); > > return ret; > > } > > > > +static int > > +intel_dp_mst_hdcp_strem_encryption(struct intel_digital_port *dig_port, > > + bool enable) > > +{ > > + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); > > + struct intel_dp *dp = &dig_port->dp; > > + struct intel_hdcp *hdcp = &dp->attached_connector->hdcp; > > + enum port port = dig_port->base.port; > > + enum transcoder cpu_transcoder = hdcp->cpu_transcoder; > > + u32 stream_enc_status; > > + int ret; > > + > > + ret = intel_dp_mst_toggle_select_hdcp_stream(dig_port, enable); > > + if (ret) > > + return ret; > > + > > + stream_enc_status = transcoder_to_stream_enc_status(hdcp- > > >stream_transcoder); > > + if (!stream_enc_status) > > + return -EINVAL; > > + > > + /* Wait for encryption confirmation */ > > + if (intel_de_wait_for_register(i915, > > + HDCP_STATUS(i915, cpu_transcoder, port), > > + stream_enc_status, > > + enable ? stream_enc_status : 0, > > + > > HDCP_ENCRYPT_STATUS_CHANGE_TIMEOUT_MS)) { > > + drm_err(&i915->drm, "Timed out waiting for stream encryption > > %s\n", > > + enable ? "enabled" : "disabled"); > > + return -ETIMEDOUT; > > + } > > + > > + return 0; > > +} > > + > > static > > bool intel_dp_mst_hdcp_check_link(struct intel_digital_port *dig_port, > > struct intel_connector *connector) @@ -673,7 > > +730,8 @@ static const struct intel_hdcp_shim intel_dp_mst_hdcp_shim = { > > .read_ksv_ready = intel_dp_hdcp_read_ksv_ready, > > .read_ksv_fifo = intel_dp_hdcp_read_ksv_fifo, > > .read_v_prime_part = intel_dp_hdcp_read_v_prime_part, > > - .toggle_signalling = intel_dp_mst_hdcp_toggle_signalling, > > + .toggle_signalling = intel_dp_hdcp_toggle_signalling, > > + .stream_encryption = intel_dp_mst_hdcp_strem_encryption, > > Typo in stream. > > > .check_link = intel_dp_mst_hdcp_check_link, > > .hdcp_capable = intel_dp_hdcp_capable, > > > > diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c > > b/drivers/gpu/drm/i915/display/intel_hdmi.c > > index f90838bc74fb..f58469226694 100644 > > --- a/drivers/gpu/drm/i915/display/intel_hdmi.c > > +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c > > @@ -1495,15 +1495,16 @@ static int kbl_repositioning_enc_en_signal(struct > > intel_connector *connector, > > usleep_range(25, 50); > > } > > > > - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, cpu_transcoder, > > - false); > > + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, cpu_transcoder, > > + false, TRANS_DDI_HDCP_SIGNALLING); > > if (ret) { > > drm_err(&dev_priv->drm, > > "Disable HDCP signalling failed (%d)\n", ret); > > return ret; > > } > > - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, cpu_transcoder, > > - true); > > + > > + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, cpu_transcoder, > > + true, TRANS_DDI_HDCP_SIGNALLING); > > if (ret) { > > drm_err(&dev_priv->drm, > > "Enable HDCP signalling failed (%d)\n", ret); @@ -1526,8 > > +1527,9 @@ int intel_hdmi_hdcp_toggle_signalling(struct intel_digital_port > > *dig_port, > > if (!enable) > > usleep_range(6, 60); /* Bspec says >= 6us */ > > > > - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, cpu_transcoder, > > - enable); > > + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, > > + cpu_transcoder, enable, > > + TRANS_DDI_HDCP_SIGNALLING); > > if (ret) { > > drm_err(&dev_priv->drm, "%s HDCP signalling failed (%d)\n", > > enable ? "Enable" : "Disable", ret); diff --git > > a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index > > d4952c9875fb..86a9a5145e47 100644 > > --- a/drivers/gpu/drm/i915/i915_reg.h > > +++ b/drivers/gpu/drm/i915/i915_reg.h > > @@ -9970,6 +9970,7 @@ enum skl_power_gate { > > #define TRANS_DDI_DP_VC_PAYLOAD_ALLOC (1 << 8) > > #define TRANS_DDI_HDMI_SCRAMBLER_CTS_ENABLE (1 << 7) #define > > TRANS_DDI_HDMI_SCRAMBLER_RESET_FREQ (1 << 6) > > +#define TRANS_DDI_HDCP_SELECT REG_BIT(5) > > #define TRANS_DDI_BFI_ENABLE (1 << 4) > > #define TRANS_DDI_HIGH_TMDS_CHAR_RATE (1 << 4) > > #define TRANS_DDI_HDMI_SCRAMBLING (1 << 0) > > -- > > 2.26.2 >
diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index bf8730267cfd..fbeffdfd1a0d 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -1948,9 +1948,9 @@ void intel_ddi_disable_transcoder_func(const struct intel_crtc_state *crtc_state } } -int intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder, - enum transcoder cpu_transcoder, - bool enable) +int intel_ddi_toggle_hdcp_bits(struct intel_encoder *intel_encoder, + enum transcoder cpu_transcoder, + bool enable, u32 hdcp_mask) { struct drm_device *dev = intel_encoder->base.dev; struct drm_i915_private *dev_priv = to_i915(dev); @@ -1965,9 +1965,9 @@ int intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder, tmp = intel_de_read(dev_priv, TRANS_DDI_FUNC_CTL(cpu_transcoder)); if (enable) - tmp |= TRANS_DDI_HDCP_SIGNALLING; + tmp |= hdcp_mask; else - tmp &= ~TRANS_DDI_HDCP_SIGNALLING; + tmp &= ~hdcp_mask; intel_de_write(dev_priv, TRANS_DDI_FUNC_CTL(cpu_transcoder), tmp); intel_display_power_put(dev_priv, intel_encoder->power_domain, wakeref); return ret; diff --git a/drivers/gpu/drm/i915/display/intel_ddi.h b/drivers/gpu/drm/i915/display/intel_ddi.h index dcc711cfe4fe..a4dd815c0000 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.h +++ b/drivers/gpu/drm/i915/display/intel_ddi.h @@ -50,9 +50,9 @@ u32 bxt_signal_levels(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state); u32 ddi_signal_levels(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state); -int intel_ddi_toggle_hdcp_signalling(struct intel_encoder *intel_encoder, - enum transcoder cpu_transcoder, - bool enable); +int intel_ddi_toggle_hdcp_bits(struct intel_encoder *intel_encoder, + enum transcoder cpu_transcoder, + bool enable, u32 hdcp_mask); void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder); #endif /* __INTEL_DDI_H__ */ diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index c47124a679b6..59b8fc21e3e8 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -339,6 +339,10 @@ struct intel_hdcp_shim { enum transcoder cpu_transcoder, bool enable); + /* Enable/Disable stream encryption on DP MST Transport Link */ + int (*stream_encryption)(struct intel_digital_port *dig_port, + bool enable); + /* Ensures the link is still protected */ bool (*check_link)(struct intel_digital_port *dig_port, struct intel_connector *connector); diff --git a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c index 03424d20e9f7..652d4645f255 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c @@ -16,6 +16,30 @@ #include "intel_dp.h" #include "intel_hdcp.h" +static unsigned int transcoder_to_stream_enc_status(enum transcoder cpu_transcoder) +{ + u32 stream_enc_mask; + + switch (cpu_transcoder) { + case TRANSCODER_A: + stream_enc_mask = HDCP_STATUS_STREAM_A_ENC; + break; + case TRANSCODER_B: + stream_enc_mask = HDCP_STATUS_STREAM_B_ENC; + break; + case TRANSCODER_C: + stream_enc_mask = HDCP_STATUS_STREAM_C_ENC; + break; + case TRANSCODER_D: + stream_enc_mask = HDCP_STATUS_STREAM_D_ENC; + break; + default: + stream_enc_mask = 0; + } + + return stream_enc_mask; +} + static void intel_dp_hdcp_wait_for_cp_irq(struct intel_hdcp *hdcp, int timeout) { long ret; @@ -622,24 +646,57 @@ static const struct intel_hdcp_shim intel_dp_hdcp_shim = { }; static int -intel_dp_mst_hdcp_toggle_signalling(struct intel_digital_port *dig_port, - enum transcoder cpu_transcoder, - bool enable) +intel_dp_mst_toggle_select_hdcp_stream(struct intel_digital_port *dig_port, + bool enable) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + struct intel_dp *dp = &dig_port->dp; + struct intel_hdcp *hdcp = &dp->attached_connector->hdcp; int ret; - if (!enable) - usleep_range(6, 60); /* Bspec says >= 6us */ - - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, - cpu_transcoder, enable); + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, + hdcp->stream_transcoder, enable, + TRANS_DDI_HDCP_SELECT); if (ret) - drm_dbg_kms(&i915->drm, "%s HDCP signalling failed (%d)\n", - enable ? "Enable" : "Disable", ret); + drm_err(&i915->drm, "%s Multistream HDCP select failed (%d)\n", + enable ? "Enable" : "Disable", ret); return ret; } +static int +intel_dp_mst_hdcp_strem_encryption(struct intel_digital_port *dig_port, + bool enable) +{ + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + struct intel_dp *dp = &dig_port->dp; + struct intel_hdcp *hdcp = &dp->attached_connector->hdcp; + enum port port = dig_port->base.port; + enum transcoder cpu_transcoder = hdcp->cpu_transcoder; + u32 stream_enc_status; + int ret; + + ret = intel_dp_mst_toggle_select_hdcp_stream(dig_port, enable); + if (ret) + return ret; + + stream_enc_status = transcoder_to_stream_enc_status(hdcp->stream_transcoder); + if (!stream_enc_status) + return -EINVAL; + + /* Wait for encryption confirmation */ + if (intel_de_wait_for_register(i915, + HDCP_STATUS(i915, cpu_transcoder, port), + stream_enc_status, + enable ? stream_enc_status : 0, + HDCP_ENCRYPT_STATUS_CHANGE_TIMEOUT_MS)) { + drm_err(&i915->drm, "Timed out waiting for stream encryption %s\n", + enable ? "enabled" : "disabled"); + return -ETIMEDOUT; + } + + return 0; +} + static bool intel_dp_mst_hdcp_check_link(struct intel_digital_port *dig_port, struct intel_connector *connector) @@ -673,7 +730,8 @@ static const struct intel_hdcp_shim intel_dp_mst_hdcp_shim = { .read_ksv_ready = intel_dp_hdcp_read_ksv_ready, .read_ksv_fifo = intel_dp_hdcp_read_ksv_fifo, .read_v_prime_part = intel_dp_hdcp_read_v_prime_part, - .toggle_signalling = intel_dp_mst_hdcp_toggle_signalling, + .toggle_signalling = intel_dp_hdcp_toggle_signalling, + .stream_encryption = intel_dp_mst_hdcp_strem_encryption, .check_link = intel_dp_mst_hdcp_check_link, .hdcp_capable = intel_dp_hdcp_capable, diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c index f90838bc74fb..f58469226694 100644 --- a/drivers/gpu/drm/i915/display/intel_hdmi.c +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c @@ -1495,15 +1495,16 @@ static int kbl_repositioning_enc_en_signal(struct intel_connector *connector, usleep_range(25, 50); } - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, cpu_transcoder, - false); + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, cpu_transcoder, + false, TRANS_DDI_HDCP_SIGNALLING); if (ret) { drm_err(&dev_priv->drm, "Disable HDCP signalling failed (%d)\n", ret); return ret; } - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, cpu_transcoder, - true); + + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, cpu_transcoder, + true, TRANS_DDI_HDCP_SIGNALLING); if (ret) { drm_err(&dev_priv->drm, "Enable HDCP signalling failed (%d)\n", ret); @@ -1526,8 +1527,9 @@ int intel_hdmi_hdcp_toggle_signalling(struct intel_digital_port *dig_port, if (!enable) usleep_range(6, 60); /* Bspec says >= 6us */ - ret = intel_ddi_toggle_hdcp_signalling(&dig_port->base, cpu_transcoder, - enable); + ret = intel_ddi_toggle_hdcp_bits(&dig_port->base, + cpu_transcoder, enable, + TRANS_DDI_HDCP_SIGNALLING); if (ret) { drm_err(&dev_priv->drm, "%s HDCP signalling failed (%d)\n", enable ? "Enable" : "Disable", ret); diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index d4952c9875fb..86a9a5145e47 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -9970,6 +9970,7 @@ enum skl_power_gate { #define TRANS_DDI_DP_VC_PAYLOAD_ALLOC (1 << 8) #define TRANS_DDI_HDMI_SCRAMBLER_CTS_ENABLE (1 << 7) #define TRANS_DDI_HDMI_SCRAMBLER_RESET_FREQ (1 << 6) +#define TRANS_DDI_HDCP_SELECT REG_BIT(5) #define TRANS_DDI_BFI_ENABLE (1 << 4) #define TRANS_DDI_HIGH_TMDS_CHAR_RATE (1 << 4) #define TRANS_DDI_HDMI_SCRAMBLING (1 << 0)
Both HDCP_{1.x,2.x} requires to select/deselect Multistream HDCP bit in TRANS_DDI_FUNC_CTL in order to enable/disable stream HDCP encryption over DP MST Transport Link. HDCP 1.4 stream encryption requires to validate the stream encryption status in HDCP_STATUS_{TRANSCODER,PORT} register driving that link in order to enable/disable the stream encryption. Both of above requirement are same for all Gen with respect to B.Spec Documentation. Cc: Ramalingam C <ramalingam.c@intel.com> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com> --- drivers/gpu/drm/i915/display/intel_ddi.c | 10 +-- drivers/gpu/drm/i915/display/intel_ddi.h | 6 +- .../drm/i915/display/intel_display_types.h | 4 + drivers/gpu/drm/i915/display/intel_dp_hdcp.c | 80 ++++++++++++++++--- drivers/gpu/drm/i915/display/intel_hdmi.c | 14 ++-- drivers/gpu/drm/i915/i915_reg.h | 1 + 6 files changed, 90 insertions(+), 25 deletions(-)