| Message ID | 20240417095537.632977-2-suraj.kandpal@intel.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | drm/i915/hdcp: Disable HDCP Line Rekeying for HDCP2.2 on HDMI | expand |
Hello Suraj, > -----Original Message----- > From: Kandpal, Suraj <suraj.kandpal@intel.com> > Sent: Wednesday, April 17, 2024 3:26 PM > To: intel-gfx@lists.freedesktop.org > Cc: Borah, Chaitanya Kumar <chaitanya.kumar.borah@intel.com>; Shankar, > Uma <uma.shankar@intel.com>; Nautiyal, Ankit K > <ankit.k.nautiyal@intel.com>; Nikula, Jani <jani.nikula@intel.com>; Kandpal, > Suraj <suraj.kandpal@intel.com> > Subject: [PATCH] drm/i915/hdcp: Disable HDCP Line Rekeying for HDCP2.2 on > HDMI > > Disable HDCP Line Rekeying when HDCP ver > 1.4 and when we are on HDMI > TMDS operation for DISPLAY_VER >= 14. > > --v2 > -Wa to be mentioned in comments not in commit message [Jani] -Remove > blankline [Jani] > > --v3 > -No need to write what is being done in comments when code is self > explanatory [Jani] > > Bspec: 49273 > Bspec: 69964 > Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com> > --- > drivers/gpu/drm/i915/display/intel_hdcp.c | 17 +++++++++++++++++ > drivers/gpu/drm/i915/i915_reg.h | 1 + > 2 files changed, 18 insertions(+) > > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c > b/drivers/gpu/drm/i915/display/intel_hdcp.c > index d5ed4c7dfbc0..78b20f23a2e1 100644 > --- a/drivers/gpu/drm/i915/display/intel_hdcp.c > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c > @@ -30,6 +30,21 @@ > #define KEY_LOAD_TRIES 5 > #define HDCP2_LC_RETRY_CNT 3 > > +/* WA: 16022217614 */ > +static void > +intel_hdcp_disable_hdcp_line_rekeying(struct intel_encoder *encoder, > + struct intel_hdcp *hdcp) > +{ > + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); > + > + if (encoder->type != INTEL_OUTPUT_HDMI) > + return; (Nit) Though we can't do much here for non-TMDS HDMI, we can keep a comment so that if such support is added in future, there is a hint to make the change. > + > + if (DISPLAY_VER(dev_priv) >= 14) > + intel_de_rmw(dev_priv, TRANS_DDI_FUNC_CTL(hdcp- > >cpu_transcoder), This register seems to differ for MTL and BMG. Kindly re-check. Regards Chaitanya > + TRANS_DDI_HDCP_LINE_REKEY_DISABLE, 1); } > + > static int intel_conn_to_vcpi(struct intel_atomic_state *state, > struct intel_connector *connector) { @@ -2005,6 > +2020,8 @@ static int _intel_hdcp2_enable(struct intel_atomic_state *state, > connector->base.base.id, connector->base.name, > hdcp->content_type); > > + intel_hdcp_disable_hdcp_line_rekeying(connector->encoder, hdcp); > + > ret = hdcp2_authenticate_and_encrypt(state, connector); > if (ret) { > drm_dbg_kms(&i915->drm, "HDCP2 Type%d Enabling Failed. > (%d)\n", diff --git a/drivers/gpu/drm/i915/i915_reg.h > b/drivers/gpu/drm/i915/i915_reg.h index 3f34efcd7d6c..fbf4623cd536 100644 > --- a/drivers/gpu/drm/i915/i915_reg.h > +++ b/drivers/gpu/drm/i915/i915_reg.h > @@ -5630,6 +5630,7 @@ enum skl_power_gate { > #define TRANS_DDI_EDP_INPUT_B_ONOFF (5 << 12) > #define TRANS_DDI_EDP_INPUT_C_ONOFF (6 << 12) > #define TRANS_DDI_EDP_INPUT_D_ONOFF (7 << 12) > +#define TRANS_DDI_HDCP_LINE_REKEY_DISABLE REG_BIT(12) > #define TRANS_DDI_MST_TRANSPORT_SELECT_MASK REG_GENMASK(11, > 10) > #define TRANS_DDI_MST_TRANSPORT_SELECT(trans) \ > REG_FIELD_PREP(TRANS_DDI_MST_TRANSPORT_SELECT_MASK, > trans) > -- > 2.43.2
diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c b/drivers/gpu/drm/i915/display/intel_hdcp.c index d5ed4c7dfbc0..78b20f23a2e1 100644 --- a/drivers/gpu/drm/i915/display/intel_hdcp.c +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c @@ -30,6 +30,21 @@ #define KEY_LOAD_TRIES 5 #define HDCP2_LC_RETRY_CNT 3 +/* WA: 16022217614 */ +static void +intel_hdcp_disable_hdcp_line_rekeying(struct intel_encoder *encoder, + struct intel_hdcp *hdcp) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + + if (encoder->type != INTEL_OUTPUT_HDMI) + return; + + if (DISPLAY_VER(dev_priv) >= 14) + intel_de_rmw(dev_priv, TRANS_DDI_FUNC_CTL(hdcp->cpu_transcoder), + TRANS_DDI_HDCP_LINE_REKEY_DISABLE, 1); +} + static int intel_conn_to_vcpi(struct intel_atomic_state *state, struct intel_connector *connector) { @@ -2005,6 +2020,8 @@ static int _intel_hdcp2_enable(struct intel_atomic_state *state, connector->base.base.id, connector->base.name, hdcp->content_type); + intel_hdcp_disable_hdcp_line_rekeying(connector->encoder, hdcp); + ret = hdcp2_authenticate_and_encrypt(state, connector); if (ret) { drm_dbg_kms(&i915->drm, "HDCP2 Type%d Enabling Failed. (%d)\n", diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 3f34efcd7d6c..fbf4623cd536 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -5630,6 +5630,7 @@ enum skl_power_gate { #define TRANS_DDI_EDP_INPUT_B_ONOFF (5 << 12) #define TRANS_DDI_EDP_INPUT_C_ONOFF (6 << 12) #define TRANS_DDI_EDP_INPUT_D_ONOFF (7 << 12) +#define TRANS_DDI_HDCP_LINE_REKEY_DISABLE REG_BIT(12) #define TRANS_DDI_MST_TRANSPORT_SELECT_MASK REG_GENMASK(11, 10) #define TRANS_DDI_MST_TRANSPORT_SELECT(trans) \ REG_FIELD_PREP(TRANS_DDI_MST_TRANSPORT_SELECT_MASK, trans)
Disable HDCP Line Rekeying when HDCP ver > 1.4 and when we are on HDMI TMDS operation for DISPLAY_VER >= 14. --v2 -Wa to be mentioned in comments not in commit message [Jani] -Remove blankline [Jani] --v3 -No need to write what is being done in comments when code is self explanatory [Jani] Bspec: 49273 Bspec: 69964 Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com> --- drivers/gpu/drm/i915/display/intel_hdcp.c | 17 +++++++++++++++++ drivers/gpu/drm/i915/i915_reg.h | 1 + 2 files changed, 18 insertions(+)