On 2020-10-27 at 22:11:58 +0530, Anshuman Gupta wrote: > 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. > > v2: > Cosmetic changes function name, error msg print and > stream typo fixes. [Uma] > > Cc: Ramalingam C <ramalingam.c@xxxxxxxxx> > Signed-off-by: Anshuman Gupta <anshuman.gupta@xxxxxxxxx> > --- > 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 9fce623e951e..779603a38cfc 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..6dcbfaffd2c5 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_hdcp_stream_select(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 */ Any reason why this is removed from disable path? Or i am missing the movement? -Ram > - > - 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 HDCP stream select failed (%d)\n", > + enable ? "Enable" : "Disable", ret); > return ret; > } > > +static int > +intel_dp_mst_hdcp_stream_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_hdcp_stream_select(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_stream_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 8b021f77cb1f..77461cde6549 100644 > --- a/drivers/gpu/drm/i915/i915_reg.h > +++ b/drivers/gpu/drm/i915/i915_reg.h > @@ -9982,6 +9982,7 @@ 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 > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel