RE: [Intel-gfx] [PATCH v6 07/10] drm/i915/hdcp: Use HDCP helpers for i915

Kandpal, Suraj
2023-03-28T06:12:39Z

> -----Original Message-----
> From: Mark Yacoub <markyacoub@chromium.org>
> Sent: Saturday, March 25, 2023 1:04 AM
> To: Kandpal, Suraj <suraj.kandpal@intel.com>
> Cc: quic_khsieh@quicinc.com; linux-arm-msm@vger.kernel.org; dri-
> devel@lists.freedesktop.org; freedreno@lists.freedesktop.org;
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> javierm@redhat.com; agross@kernel.org; quic_jesszhan@quicinc.com;
> daniel@ffwll.ch; Nikula, Jani <jani.nikula@intel.com>; De Marchi, Lucas
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> <rodrigo.vivi@intel.com>; johan+linaro@kernel.org; andersson@kernel.org;
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> dmitry.baryshkov@linaro.org; seanpaul@chromium.org
> Subject: Re: [Intel-gfx] [PATCH v6 07/10] drm/i915/hdcp: Use HDCP helpers
> for i915
>
> On Tue, Mar 14, 2023 at 1:54 AM Kandpal, Suraj <suraj.kandpal@intel.com>
> wrote:
> >
> > >
> > > From: Sean Paul <seanpaul@chromium.org>
> > >
> > > Now that all of the HDCP 1.x logic has been migrated to the central HDCP
> > > helpers, use it in the i915 driver.
> > >
> > > The majority of the driver code for HDCP 1.x will live in intel_hdcp.c,
> > > however there are a few helper hooks which are connector-specific and
> > > need to be partially or fully implemented in the intel_dp_hdcp.c or
> > > intel_hdmi.c.
> > >
> > > We'll leave most of the HDCP 2.x code alone since we don't have another
> > > implementation of HDCP 2.x to use as reference for what should and
> > > should not live in the drm helpers. The helper will call the overly
> > > general enable/disable/is_capable HDCP 2.x callbacks and leave the
> > > interesting stuff for the driver. Once we have another HDCP 2.x
> > > implementation, we should do a similar migration.
> > >
> > > Acked-by: Jani Nikula <jani.nikula@intel.com>
> > > Signed-off-by: Sean Paul <seanpaul@chromium.org>
> > > Signed-off-by: Mark Yacoub <markyacoub@chromium.org>
> > > Link:
> > >
> https://patchwork.freedesktop.org/patch/msgid/20210913175747.47456-8-
> > > sean@poorly.run #v1
> > > Link:
> > > https://patchwork.freedesktop.org/patch/msgid/20210915203834.1439-
> 8-
> > > sean@poorly.run #v2
> > > Link:
> > >
> https://patchwork.freedesktop.org/patch/msgid/20211001151145.55916-8-
> > > sean@poorly.run #v3
> > > Link:
> > >
> https://patchwork.freedesktop.org/patch/msgid/20211105030434.2828845-
> > > 8-sean@poorly.run #v4
> > > Link:
> > >
> https://patchwork.freedesktop.org/patch/msgid/20220411204741.1074308-
> > > 8-sean@poorly.run #v5
> > >
> > > Changes in v2:
> > > -Fix mst helper function pointer reported by 0-day
> > > Changes in v3:
> > > -Add forward declaration for drm_atomic_state in intel_hdcp.h identified
> > > by 0-day
> > > Changes in v4:
> > > -None
> > > Changes in v5:
> > > -None
> > > Changes in v6:
> > > -Rebased.
> > >
> > > ---
> > > drivers/gpu/drm/i915/display/intel_ddi.c | 32 +-
> > > .../drm/i915/display/intel_display_debugfs.c | 6 +-
> > > .../drm/i915/display/intel_display_types.h | 60 +-
> > > drivers/gpu/drm/i915/display/intel_dp_hdcp.c | 348 +++----
> > > drivers/gpu/drm/i915/display/intel_dp_mst.c | 16 +-
> > > drivers/gpu/drm/i915/display/intel_hdcp.c | 952 +++---------------
> > > drivers/gpu/drm/i915/display/intel_hdcp.h | 31 +-
> > > drivers/gpu/drm/i915/display/intel_hdmi.c | 270 ++---
> > > 8 files changed, 445 insertions(+), 1270 deletions(-)
> > >
> > > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
> > > b/drivers/gpu/drm/i915/display/intel_ddi.c
> > > index 69ecf2a3d6c6..a4397f066a3e 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> > > @@ -28,6 +28,7 @@
> > > #include <linux/string_helpers.h>
> > >
> > > #include <drm/display/drm_scdc_helper.h>
> > > +#include <drm/display/drm_hdcp_helper.h>
> > > #include <drm/drm_privacy_screen_consumer.h>
> > >
> > > #include "i915_drv.h"
> > > @@ -2909,6 +2910,10 @@ static void intel_enable_ddi(struct
> > > intel_atomic_state *state,
> > > const struct intel_crtc_state *crtc_state,
> > > const struct drm_connector_state *conn_state)
> > > {
> > > + struct intel_connector *connector =
> > > + to_intel_connector(conn_state->connector);
> > > + struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
> > > +
> > > drm_WARN_ON(state->base.dev, crtc_state->has_pch_encoder);
> > >
> > > if (!intel_crtc_is_bigjoiner_slave(crtc_state))
> > > @@ -2925,12 +2930,10 @@ static void intel_enable_ddi(struct
> > > intel_atomic_state *state,
> > > else
> > > intel_enable_ddi_dp(state, encoder, crtc_state,
> > > conn_state);
> > >
> > > - /* Enable hdcp if it's desired */
> > > - if (conn_state->content_protection ==
> > > - DRM_MODE_CONTENT_PROTECTION_DESIRED)
> > > - intel_hdcp_enable(to_intel_connector(conn_state-
> > > >connector),
> > > - crtc_state,
> > > - (u8)conn_state->hdcp_content_type);
> > > + if (connector->hdcp_helper_data)
> > > + drm_hdcp_helper_atomic_commit(connector-
> > > >hdcp_helper_data,
> > > + &state->base,
> > > + &dig_port->hdcp_mutex);
> > > }
> > >
> > > static void intel_disable_ddi_dp(struct intel_atomic_state *state,
> > > @@ -2976,7 +2979,14 @@ static void intel_disable_ddi(struct
> > > intel_atomic_state *state,
> > > const struct intel_crtc_state *old_crtc_state,
> > > const struct drm_connector_state
> > > *old_conn_state)
> > > {
> > > - intel_hdcp_disable(to_intel_connector(old_conn_state-
> > > >connector));
> > > + struct intel_connector *connector =
> > > + to_intel_connector(old_conn_state->connector);
> > > + struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
> > > +
> > > + if (connector->hdcp_helper_data)
> > > + drm_hdcp_helper_atomic_commit(connector-
> > > >hdcp_helper_data,
> > > + &state->base,
> > > + &dig_port->hdcp_mutex);
> > >
> > > if (intel_crtc_has_type(old_crtc_state, INTEL_OUTPUT_HDMI))
> > > intel_disable_ddi_hdmi(state, encoder, old_crtc_state,
> > > @@ -3004,13 +3014,19 @@ void intel_ddi_update_pipe(struct
> > > intel_atomic_state *state,
> > > const struct intel_crtc_state *crtc_state,
> > > const struct drm_connector_state *conn_state)
> > > {
> > > + struct intel_connector *connector =
> > > + to_intel_connector(conn_state->connector);
> > > + struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
> > >
> > > if (!intel_crtc_has_type(crtc_state, INTEL_OUTPUT_HDMI) &&
> > > !intel_encoder_is_mst(encoder))
> > > intel_ddi_update_pipe_dp(state, encoder, crtc_state,
> > > conn_state);
> > >
> > > - intel_hdcp_update_pipe(state, encoder, crtc_state, conn_state);
> > > + if (connector->hdcp_helper_data)
> > > + drm_hdcp_helper_atomic_commit(connector-
> > > >hdcp_helper_data,
> > > + &state->base,
> > > + &dig_port->hdcp_mutex);
> > > }
> > >
> > > static void
> > > diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > > b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > > index 13a4153bb76e..2e67cca0151c 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
> > > @@ -7,6 +7,7 @@
> > >
> > > #include <drm/drm_debugfs.h>
> > > #include <drm/drm_fourcc.h>
> > > +#include <drm/display/drm_hdcp_helper.h>
> > >
> > > #include "i915_debugfs.h"
> > > #include "intel_de.h"
> > > @@ -500,10 +501,11 @@ static void intel_hdcp_info(struct seq_file *m,
> > > goto out;
> > > }
> > >
> > > - ret = intel_hdcp_capable(intel_connector, &hdcp_cap);
> > > + ret = drm_hdcp_helper_hdcp1_capable(intel_connector-
> > > >hdcp_helper_data,
> > > + &hdcp_cap);
> > > if (ret)
> > > hdcp_cap = false;
> > > - ret = intel_hdcp2_capable(intel_connector, &hdcp2_cap);
> > > + ret = intel_hdcp2_capable(&intel_connector->base, &hdcp2_cap);
> > > if (ret)
> > > hdcp2_cap = false;
> > >
> > > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> > > b/drivers/gpu/drm/i915/display/intel_display_types.h
> > > index 298d00a11f47..6260a40586ae 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> > > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> > > @@ -416,71 +416,14 @@ enum check_link_response {
> > > * The offsets of the registers are different for DP vs. HDMI
> > > * - Receiver register masks/offsets
> > > * For instance, the ready bit for the KSV fifo is in a different
> > > - * place on DP vs HDMI
> > > - * - Receiver register names
> > > - * Seriously. In the DP spec, the 16-bit register containing
> > > - * downstream information is called BINFO, on HDMI it's called
> > > - * BSTATUS. To confuse matters further, DP has a BSTATUS
> > > register
> > > - * with a completely different definition.
> > > - * - KSV FIFO
> > > - * On HDMI, the ksv fifo is read all at once, whereas on DP it
> > > must
> > > - * be read 3 keys at a time
> > > - * - Aksv output
> > > - * Since Aksv is hidden in hardware, there's different
> > > procedures
> > > - * to send it over DP AUX vs DDC
> >
> > I really think we can keep the comment as its mentioning the ways that the
> two busses differ
> >
> Reverted the change.
> > > + * place on DP vs HDMI.
> > > */
> > > struct intel_hdcp_shim {
> > > - /* Outputs the transmitter's An and Aksv values to the receiver. */
> > > - int (*write_an_aksv)(struct intel_digital_port *dig_port, u8 *an);
> > > -
> > > - /* Reads the receiver's key selection vector */
> > > - int (*read_bksv)(struct intel_digital_port *dig_port, u8 *bksv);
> > > -
> > > - /*
> > > - * Reads BINFO from DP receivers and BSTATUS from HDMI
> > > receivers. The
> > > - * definitions are the same in the respective specs, but the names
> > > are
> > > - * different. Call it BSTATUS since that's the name the HDMI spec
> > > - * uses and it was there first.
> > > - */
> > > - int (*read_bstatus)(struct intel_digital_port *dig_port,
> > > - u8 *bstatus);
> > > -
> > > - /* Determines whether a repeater is present downstream */
> > > - int (*repeater_present)(struct intel_digital_port *dig_port,
> > > - bool *repeater_present);
> > > -
> > > - /* Reads the receiver's Ri' value */
> > > - int (*read_ri_prime)(struct intel_digital_port *dig_port, u8 *ri);
> > > -
> > > - /* Determines if the receiver's KSV FIFO is ready for consumption */
> > > - int (*read_ksv_ready)(struct intel_digital_port *dig_port,
> > > - bool *ksv_ready);
> > > -
> > > - /* Reads the ksv fifo for num_downstream devices */
> > > - int (*read_ksv_fifo)(struct intel_digital_port *dig_port,
> > > - int num_downstream, u8 *ksv_fifo);
> > > -
> > > - /* Reads a 32-bit part of V' from the receiver */
> > > - int (*read_v_prime_part)(struct intel_digital_port *dig_port,
> > > - int i, u32 *part);
> > > -
> > > /* Enables HDCP signalling on the port */
> > > int (*toggle_signalling)(struct intel_digital_port *dig_port,
> > > enum transcoder cpu_transcoder,
> > > bool enable);
> > >
> > > - /* Enable/Disable stream encryption on DP MST Transport Link */
> > > - int (*stream_encryption)(struct intel_connector *connector,
> > > - bool enable);
> > > -
> > > - /* Ensures the link is still protected */
> > > - bool (*check_link)(struct intel_digital_port *dig_port,
> > > - struct intel_connector *connector);
> > > -
> > > - /* Detects panel's hdcp capability. This is optional for HDMI. */
> > > - int (*hdcp_capable)(struct intel_digital_port *dig_port,
> > > - bool *hdcp_capable);
> > > -
> > > /* HDCP adaptation(DP/HDMI) required on the port */
> > > enum hdcp_wired_protocol protocol;
> > >
> > > @@ -610,6 +553,7 @@ struct intel_connector {
> > > struct work_struct modeset_retry_work;
> > >
> > > struct intel_hdcp hdcp;
> > > + struct drm_hdcp_helper_data *hdcp_helper_data;
> > > };
> > >
> > > struct intel_digital_connector_state {
> > > diff --git a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
> > > b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
> > > index 88689124c013..d61ac8d69951 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_dp_hdcp.c
> > > @@ -55,17 +55,24 @@ static void intel_dp_hdcp_wait_for_cp_irq(struct
> > > intel_hdcp *hdcp, int timeout)
> > > DRM_DEBUG_KMS("Timedout at waiting for CP_IRQ\n");
> > > }
> > >
> > > -static
> > > -int intel_dp_hdcp_write_an_aksv(struct intel_digital_port *dig_port,
> > > - u8 *an)
> > > +static int intel_dp_hdcp1_send_an_aksv(struct drm_connector
> > > *drm_connector)
> > > {
> >
> > I think the name intel_dp_hdcp_send_an_aksv should be enough as this
> step
> > is done only for hdcp 1.x and not hdcp 2.x.
> >
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > + struct drm_hdcp_an an;
> > > u8 aksv[DRM_HDCP_KSV_LEN] = {};
> > > ssize_t dpcd_ret;
> > > + int ret;
> > >
> > > /* Output An first, that's easy */
> > > + ret = intel_hdcp1_read_an(drm_connector, &an);
> > > + if (ret)
> > > + return ret;
> > > +
> > > dpcd_ret = drm_dp_dpcd_write(&dig_port->dp.aux,
> > > DP_AUX_HDCP_AN,
> > > - an, DRM_HDCP_AN_LEN);
> > > + an.bytes, DRM_HDCP_AN_LEN);
> > > if (dpcd_ret != DRM_HDCP_AN_LEN) {
> > > drm_dbg_kms(&i915->drm,
> > > "Failed to write An over DP/AUX (%zd)\n",
> > > @@ -91,158 +98,6 @@ int intel_dp_hdcp_write_an_aksv(struct
> > > intel_digital_port *dig_port,
> > > return 0;
> > > }
> > >
> > > -static int intel_dp_hdcp_read_bksv(struct intel_digital_port *dig_port,
> > > - u8 *bksv)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - ssize_t ret;
> > > -
> > > - ret = drm_dp_dpcd_read(&dig_port->dp.aux, DP_AUX_HDCP_BKSV,
> > > bksv,
> > > - DRM_HDCP_KSV_LEN);
> > > - if (ret != DRM_HDCP_KSV_LEN) {
> > > - drm_dbg_kms(&i915->drm,
> > > - "Read Bksv from DP/AUX failed (%zd)\n", ret);
> > > - return ret >= 0 ? -EIO : ret;
> > > - }
> > > - return 0;
> > > -}
> > > -
> > > -static int intel_dp_hdcp_read_bstatus(struct intel_digital_port *dig_port,
> > > - u8 *bstatus)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - ssize_t ret;
> > > -
> > > - /*
> > > - * For some reason the HDMI and DP HDCP specs call this register
> > > - * definition by different names. In the HDMI spec, it's called
> > > BSTATUS,
> > > - * but in DP it's called BINFO.
> > > - */
> > > - ret = drm_dp_dpcd_read(&dig_port->dp.aux,
> > > DP_AUX_HDCP_BINFO,
> > > - bstatus, DRM_HDCP_BSTATUS_LEN);
> > > - if (ret != DRM_HDCP_BSTATUS_LEN) {
> > > - drm_dbg_kms(&i915->drm,
> > > - "Read bstatus from DP/AUX failed (%zd)\n", ret);
> > > - return ret >= 0 ? -EIO : ret;
> > > - }
> > > - return 0;
> > > -}
> > > -
> > > -static
> > > -int intel_dp_hdcp_read_bcaps(struct intel_digital_port *dig_port,
> > > - u8 *bcaps)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - ssize_t ret;
> > > -
> > > - ret = drm_dp_dpcd_read(&dig_port->dp.aux,
> > > DP_AUX_HDCP_BCAPS,
> > > - bcaps, 1);
> > > - if (ret != 1) {
> > > - drm_dbg_kms(&i915->drm,
> > > - "Read bcaps from DP/AUX failed (%zd)\n", ret);
> > > - return ret >= 0 ? -EIO : ret;
> > > - }
> > > -
> > > - return 0;
> > > -}
> > > -
> > > -static
> > > -int intel_dp_hdcp_repeater_present(struct intel_digital_port *dig_port,
> > > - bool *repeater_present)
> > > -{
> > > - ssize_t ret;
> > > - u8 bcaps;
> > > -
> > > - ret = intel_dp_hdcp_read_bcaps(dig_port, &bcaps);
> > > - if (ret)
> > > - return ret;
> > > -
> > > - *repeater_present = bcaps & DP_BCAPS_REPEATER_PRESENT;
> > > - return 0;
> > > -}
> > > -
> > > -static
> > > -int intel_dp_hdcp_read_ri_prime(struct intel_digital_port *dig_port,
> > > - u8 *ri_prime)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - ssize_t ret;
> > > -
> > > - ret = drm_dp_dpcd_read(&dig_port->dp.aux,
> > > DP_AUX_HDCP_RI_PRIME,
> > > - ri_prime, DRM_HDCP_RI_LEN);
> > > - if (ret != DRM_HDCP_RI_LEN) {
> > > - drm_dbg_kms(&i915->drm, "Read Ri' from DP/AUX failed
> > > (%zd)\n",
> > > - ret);
> > > - return ret >= 0 ? -EIO : ret;
> > > - }
> > > - return 0;
> > > -}
> > > -
> > > -static
> > > -int intel_dp_hdcp_read_ksv_ready(struct intel_digital_port *dig_port,
> > > - bool *ksv_ready)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - ssize_t ret;
> > > - u8 bstatus;
> > > -
> > > - ret = drm_dp_dpcd_read(&dig_port->dp.aux,
> > > DP_AUX_HDCP_BSTATUS,
> > > - &bstatus, 1);
> > > - if (ret != 1) {
> > > - drm_dbg_kms(&i915->drm,
> > > - "Read bstatus from DP/AUX failed (%zd)\n", ret);
> > > - return ret >= 0 ? -EIO : ret;
> > > - }
> > > - *ksv_ready = bstatus & DP_BSTATUS_READY;
> > > - return 0;
> > > -}
> > > -
> > > -static
> > > -int intel_dp_hdcp_read_ksv_fifo(struct intel_digital_port *dig_port,
> > > - int num_downstream, u8 *ksv_fifo)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - ssize_t ret;
> > > - int i;
> > > -
> > > - /* KSV list is read via 15 byte window (3 entries @ 5 bytes each) */
> > > - for (i = 0; i < num_downstream; i += 3) {
> > > - size_t len = min(num_downstream - i, 3) *
> > > DRM_HDCP_KSV_LEN;
> > > - ret = drm_dp_dpcd_read(&dig_port->dp.aux,
> > > - DP_AUX_HDCP_KSV_FIFO,
> > > - ksv_fifo + i * DRM_HDCP_KSV_LEN,
> > > - len);
> > > - if (ret != len) {
> > > - drm_dbg_kms(&i915->drm,
> > > - "Read ksv[%d] from DP/AUX failed
> > > (%zd)\n",
> > > - i, ret);
> > > - return ret >= 0 ? -EIO : ret;
> > > - }
> > > - }
> > > - return 0;
> > > -}
> > > -
> > > -static
> > > -int intel_dp_hdcp_read_v_prime_part(struct intel_digital_port
> *dig_port,
> > > - int i, u32 *part)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - ssize_t ret;
> > > -
> > > - if (i >= DRM_HDCP_V_PRIME_NUM_PARTS)
> > > - return -EINVAL;
> > > -
> > > - ret = drm_dp_dpcd_read(&dig_port->dp.aux,
> > > - DP_AUX_HDCP_V_PRIME(i), part,
> > > - DRM_HDCP_V_PRIME_PART_LEN);
> > > - if (ret != DRM_HDCP_V_PRIME_PART_LEN) {
> > > - drm_dbg_kms(&i915->drm,
> > > - "Read v'[%d] from DP/AUX failed (%zd)\n", i, ret);
> > > - return ret >= 0 ? -EIO : ret;
> > > - }
> > > - return 0;
> > > -}
> > > -
> > > static
> > > int intel_dp_hdcp_toggle_signalling(struct intel_digital_port *dig_port,
> > > enum transcoder cpu_transcoder,
> > > @@ -252,40 +107,6 @@ int intel_dp_hdcp_toggle_signalling(struct
> > > intel_digital_port *dig_port,
> > > return 0;
> > > }
> > >
> > > -static
> > > -bool intel_dp_hdcp_check_link(struct intel_digital_port *dig_port,
> > > - struct intel_connector *connector)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - ssize_t ret;
> > > - u8 bstatus;
> > > -
> > > - ret = drm_dp_dpcd_read(&dig_port->dp.aux,
> > > DP_AUX_HDCP_BSTATUS,
> > > - &bstatus, 1);
> > > - if (ret != 1) {
> > > - drm_dbg_kms(&i915->drm,
> > > - "Read bstatus from DP/AUX failed (%zd)\n", ret);
> > > - return false;
> > > - }
> > > -
> > > - return !(bstatus & (DP_BSTATUS_LINK_FAILURE |
> > > DP_BSTATUS_REAUTH_REQ));
> > > -}
> > > -
> > > -static
> > > -int intel_dp_hdcp_capable(struct intel_digital_port *dig_port,
> > > - bool *hdcp_capable)
> > > -{
> > > - ssize_t ret;
> > > - u8 bcaps;
> > > -
> > > - ret = intel_dp_hdcp_read_bcaps(dig_port, &bcaps);
> > > - if (ret)
> > > - return ret;
> > > -
> > > - *hdcp_capable = bcaps & DP_BCAPS_HDCP_CAPABLE;
> > > - return 0;
> > > -}
> > > -
> > > struct hdcp2_dp_errata_stream_type {
> > > u8 msg_id;
> > > u8 stream_type;
> > > @@ -628,13 +449,19 @@ int intel_dp_hdcp2_check_link(struct
> > > intel_digital_port *dig_port,
> > > return ret;
> > > }
> > >
> > > -static
> > > -int intel_dp_hdcp2_capable(struct intel_digital_port *dig_port,
> > > - bool *capable)
> > > +static int intel_dp_hdcp2_capable(struct drm_connector
> *drm_connector,
> > > + bool *capable)
> > > {
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > u8 rx_caps[3];
> > > int ret;
> > >
> > > + ret = intel_hdcp2_capable(drm_connector, capable);
> > > + if (ret || !capable)
> > > + return ret;
> > > +
> > > *capable = false;
> > > ret = drm_dp_dpcd_read(&dig_port->dp.aux,
> > > DP_HDCP_2_2_REG_RX_CAPS_OFFSET,
> > > @@ -650,22 +477,11 @@ int intel_dp_hdcp2_capable(struct
> > > intel_digital_port *dig_port,
> > > }
> > >
> > > static const struct intel_hdcp_shim intel_dp_hdcp_shim = {
> > > - .write_an_aksv = intel_dp_hdcp_write_an_aksv,
> > > - .read_bksv = intel_dp_hdcp_read_bksv,
> > > - .read_bstatus = intel_dp_hdcp_read_bstatus,
> > > - .repeater_present = intel_dp_hdcp_repeater_present,
> > > - .read_ri_prime = intel_dp_hdcp_read_ri_prime,
> > > - .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_hdcp_toggle_signalling,
> > > - .check_link = intel_dp_hdcp_check_link,
> > > - .hdcp_capable = intel_dp_hdcp_capable,
> > > .write_2_2_msg = intel_dp_hdcp2_write_msg,
> > > .read_2_2_msg = intel_dp_hdcp2_read_msg,
> > > .config_stream_type = intel_dp_hdcp2_config_stream_type,
> > > .check_2_2_link = intel_dp_hdcp2_check_link,
> > > - .hdcp_2_2_capable = intel_dp_hdcp2_capable,
> > > .protocol = HDCP_PROTOCOL_DP,
> > > };
> > >
> > > @@ -721,6 +537,46 @@ intel_dp_mst_hdcp_stream_encryption(struct
> > > intel_connector *connector,
> > > return 0;
> > > }
> > >
> > > +static int
> > > +intel_dp_mst_hdcp1_post_encryption(struct drm_connector
> > > *drm_connector)
> > > +{
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + int ret;
> > > +
> > > + ret = intel_hdcp1_post_encryption(drm_connector);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + return intel_dp_mst_hdcp_stream_encryption(connector, true);
> > > +}
> > > +
> > > +static int intel_dp_mst_hdcp1_disable(struct drm_connector
> > > *drm_connector)
> > > +{
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > + struct drm_i915_private *i915 = to_i915(connector->base.dev);
> > > + int ret;
> > > +
> > > + ret = intel_dp_mst_hdcp_stream_encryption(connector, true);
> > > + if (ret) {
> > > + drm_err(&i915->drm,
> > > + "[%s:%d] Failed to disable HDCP 1.4 stream enc\n",
> > > + connector->base.name, connector->base.base.id);
> > > + return ret;
> > > + }
> > > +
> > > + /*
> > > + * If there are other connectors on this port using HDCP,
> > > + * don't disable it until it disabled HDCP encryption for
> > > + * all connectors in MST topology.
> > > + */
> > > + if (dig_port->num_hdcp_streams > 0)
> > > + return 0;
> > > +
> > > + return intel_hdcp1_disable(drm_connector);
> > > +}
> > > +
> > > static int
> > > intel_dp_mst_hdcp2_stream_encryption(struct intel_connector
> > > *connector,
> > > bool enable)
> > > @@ -779,45 +635,85 @@ int intel_dp_mst_hdcp2_check_link(struct
> > > intel_digital_port *dig_port,
> > > }
> > >
> > > static const struct intel_hdcp_shim intel_dp_mst_hdcp_shim = {
> > > - .write_an_aksv = intel_dp_hdcp_write_an_aksv,
> > > - .read_bksv = intel_dp_hdcp_read_bksv,
> > > - .read_bstatus = intel_dp_hdcp_read_bstatus,
> > > - .repeater_present = intel_dp_hdcp_repeater_present,
> > > - .read_ri_prime = intel_dp_hdcp_read_ri_prime,
> > > - .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_hdcp_toggle_signalling,
> > > - .stream_encryption = intel_dp_mst_hdcp_stream_encryption,
> > > - .check_link = intel_dp_hdcp_check_link,
> > > - .hdcp_capable = intel_dp_hdcp_capable,
> > > .write_2_2_msg = intel_dp_hdcp2_write_msg,
> > > .read_2_2_msg = intel_dp_hdcp2_read_msg,
> > > .config_stream_type = intel_dp_hdcp2_config_stream_type,
> > > .stream_2_2_encryption = intel_dp_mst_hdcp2_stream_encryption,
> > > .check_2_2_link = intel_dp_mst_hdcp2_check_link,
> > > - .hdcp_2_2_capable = intel_dp_hdcp2_capable,
> > > .protocol = HDCP_PROTOCOL_DP,
> > > };
> > >
> > > +static const struct drm_hdcp_helper_funcs intel_dp_hdcp_helper_funcs
> = {
> > > + .setup = intel_hdcp_setup,
> > > + .load_keys = intel_hdcp_load_keys,
> > > + .hdcp2_capable = intel_dp_hdcp2_capable,
> > > + .hdcp2_enable = intel_hdcp2_enable,
> > > + .hdcp2_check_link = intel_hdcp2_check_link,
> > > + .hdcp2_disable = intel_hdcp2_disable,
> > > + .hdcp1_send_an_aksv = intel_dp_hdcp1_send_an_aksv,
> > > + .hdcp1_store_receiver_info = intel_hdcp1_store_receiver_info,
> > > + .hdcp1_enable_encryption = intel_hdcp1_enable_encryption,
> > > + .hdcp1_wait_for_r0 = intel_hdcp1_wait_for_r0,
> > > + .hdcp1_match_ri = intel_hdcp1_match_ri,
> > > + .hdcp1_post_encryption = intel_hdcp1_post_encryption,
> > > + .hdcp1_store_ksv_fifo = intel_hdcp1_store_ksv_fifo,
> > > + .hdcp1_disable = intel_hdcp1_disable,
> > > +};
> > > +
> > > +static const struct drm_hdcp_helper_funcs
> > > intel_dp_mst_hdcp_helper_funcs = {
> > > + .setup = intel_hdcp_setup,
> > > + .load_keys = intel_hdcp_load_keys,
> > > + .hdcp2_capable = intel_dp_hdcp2_capable,
> > > + .hdcp2_enable = intel_hdcp2_enable,
> > > + .hdcp2_check_link = intel_hdcp2_check_link,
> > > + .hdcp2_disable = intel_hdcp2_disable,
> > > + .hdcp1_send_an_aksv = intel_dp_hdcp1_send_an_aksv,
> > > + .hdcp1_store_receiver_info = intel_hdcp1_store_receiver_info,
> > > + .hdcp1_enable_encryption = intel_hdcp1_enable_encryption,
> > > + .hdcp1_wait_for_r0 = intel_hdcp1_wait_for_r0,
> > > + .hdcp1_match_ri = intel_hdcp1_match_ri,
> > > + .hdcp1_post_encryption = intel_dp_mst_hdcp1_post_encryption,
> > > + .hdcp1_store_ksv_fifo = intel_hdcp1_store_ksv_fifo,
> > > + .hdcp1_disable = intel_dp_mst_hdcp1_disable,
> > > +};
> > > +
> > > int intel_dp_hdcp_init(struct intel_digital_port *dig_port,
> > > - struct intel_connector *intel_connector)
> > > + struct intel_connector *connector)
> > > {
> > > - struct drm_device *dev = intel_connector->base.dev;
> > > - struct drm_i915_private *dev_priv = to_i915(dev);
> > > + struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > struct intel_encoder *intel_encoder = &dig_port->base;
> > > enum port port = intel_encoder->port;
> > > struct intel_dp *intel_dp = &dig_port->dp;
> > > + struct drm_hdcp_helper_data *data;
> > > + const struct drm_hdcp_helper_funcs *helper_funcs;
> > > + const struct intel_hdcp_shim *intel_shim;
> > > + int ret;
> > >
> > > - if (!is_hdcp_supported(dev_priv, port))
> > > + if (!is_hdcp_supported(dev_priv, port) ||
> > > intel_dp_is_edp(intel_dp))
> > > return 0;
> > >
> > > - if (intel_connector->mst_port)
> > > - return intel_hdcp_init(intel_connector, dig_port,
> > > - &intel_dp_mst_hdcp_shim);
> > > - else if (!intel_dp_is_edp(intel_dp))
> > > - return intel_hdcp_init(intel_connector, dig_port,
> > > - &intel_dp_hdcp_shim);
> > > + if (connector->mst_port) {
> > > + helper_funcs = &intel_dp_mst_hdcp_helper_funcs;
> > > + intel_shim = &intel_dp_mst_hdcp_shim;
> > > + } else {
> > > + helper_funcs = &intel_dp_hdcp_helper_funcs;
> > > + intel_shim = &intel_dp_hdcp_shim;
> > > + }
> > > +
> > > + data = drm_hdcp_helper_initialize_dp(
> > > + &connector->base, &dig_port->dp.aux, helper_funcs, true);
> >
> > The alignment here needs fixing
> >
> > > + if (IS_ERR(data)) {
> > > + drm_dbg_kms(&dev_priv->drm, "HDCP init failed,
> > > skipping.\n");
> > > + return PTR_ERR(data);
> > > + }
> > > +
> > > + ret = intel_hdcp_init(connector, dig_port, intel_shim);
> > > + if (ret) {
> > > + drm_hdcp_helper_destroy(data);
> > > + return ret;
> > > + }
> > >
> > > + connector->hdcp_helper_data = data;
> > > return 0;
> > > }
> > > diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> > > b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> > > index 03604a37931c..ececb7aa4b90 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
> > > @@ -27,6 +27,7 @@
> > > #include <drm/drm_atomic_helper.h>
> > > #include <drm/drm_edid.h>
> > > #include <drm/drm_probe_helper.h>
> > > +#include <drm/display/drm_hdcp_helper.h>
> > >
> > > #include "i915_drv.h"
> > > #include "intel_atomic.h"
> > > @@ -40,7 +41,6 @@
> > > #include "intel_dp_hdcp.h"
> > > #include "intel_dp_mst.h"
> > > #include "intel_dpio_phy.h"
> > > -#include "intel_hdcp.h"
> > > #include "intel_hotplug.h"
> > > #include "skl_scaler.h"
> > >
> > > @@ -371,7 +371,10 @@ static void intel_mst_disable_dp(struct
> > > intel_atomic_state *state,
> > > drm_dbg_kms(&i915->drm, "active links %d\n",
> > > intel_dp->active_mst_links);
> > >
> > > - intel_hdcp_disable(intel_mst->connector);
> > > + if (connector->hdcp_helper_data)
> > > + drm_hdcp_helper_atomic_commit(connector-
> > > >hdcp_helper_data,
> > > + &state->base,
> > > + &dig_port->hdcp_mutex);
> > >
> > > drm_dp_remove_payload(&intel_dp->mst_mgr, mst_state,
> > > drm_atomic_get_mst_payload_state(mst_state,
> > > connector->port));
> > > @@ -579,11 +582,10 @@ static void intel_mst_enable_dp(struct
> > > intel_atomic_state *state,
> > > intel_audio_codec_enable(encoder, pipe_config, conn_state);
> > >
> > > /* Enable hdcp if it's desired */
> > > - if (conn_state->content_protection ==
> > > - DRM_MODE_CONTENT_PROTECTION_DESIRED)
> > > - intel_hdcp_enable(to_intel_connector(conn_state-
> > > >connector),
> > > - pipe_config,
> > > - (u8)conn_state->hdcp_content_type);
> > > + if (connector->hdcp_helper_data)
> > > + drm_hdcp_helper_atomic_commit(connector-
> > > >hdcp_helper_data,
> > > + &state->base,
> > > + &dig_port->hdcp_mutex);
> > > }
> > >
> > > static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder
> *encoder,
> > > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > > b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > > index 61a862ae1f28..f09afbc9567b 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_hdcp.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.c
> > > @@ -140,67 +140,10 @@ static int intel_hdcp_prepare_streams(struct
> > > intel_connector *connector)
> > > return 0;
> > > }
> > >
> > > -static
> > > -bool intel_hdcp_is_ksv_valid(u8 *ksv)
> > > -{
> > > - int i, ones = 0;
> > > - /* KSV has 20 1's and 20 0's */
> > > - for (i = 0; i < DRM_HDCP_KSV_LEN; i++)
> > > - ones += hweight8(ksv[i]);
> > > - if (ones != 20)
> > > - return false;
> > > -
> > > - return true;
> > > -}
> > > -
> > > -static
> > > -int intel_hdcp_read_valid_bksv(struct intel_digital_port *dig_port,
> > > - const struct intel_hdcp_shim *shim, u8 *bksv)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - int ret, i, tries = 2;
> > > -
> > > - /* HDCP spec states that we must retry the bksv if it is invalid */
> > > - for (i = 0; i < tries; i++) {
> > > - ret = shim->read_bksv(dig_port, bksv);
> > > - if (ret)
> > > - return ret;
> > > - if (intel_hdcp_is_ksv_valid(bksv))
> > > - break;
> > > - }
> > > - if (i == tries) {
> > > - drm_dbg_kms(&i915->drm, "Bksv is invalid\n");
> > > - return -ENODEV;
> > > - }
> > > -
> > > - return 0;
> > > -}
> > > -
> > > -/* Is HDCP1.4 capable on Platform and Sink */
> > > -int intel_hdcp_capable(struct intel_connector *connector, bool
> *capable)
> > > -{
> > > - struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > - const struct intel_hdcp_shim *shim = connector->hdcp.shim;
> > > - u8 bksv[5];
> > > -
> > > - *capable = false;
> > > -
> > > - if (!shim)
> > > - return 0;
> > > -
> > > - if (shim->hdcp_capable)
> > > - return shim->hdcp_capable(dig_port, capable);
> > > -
> > > - if (!intel_hdcp_read_valid_bksv(dig_port, shim, bksv))
> > > - *capable = true;
> > > -
> > > - return 0;
> > > -}
> > > -
> > > /* Is HDCP2.2 capable on Platform and Sink */
> > > -int intel_hdcp2_capable(struct intel_connector *connector, bool
> *capable)
> > > +int intel_hdcp2_capable(struct drm_connector *drm_connector, bool
> > > *capable)
> > > {
> > > - struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > struct intel_hdcp *hdcp = &connector->hdcp;
> > >
> > > @@ -218,16 +161,26 @@ int intel_hdcp2_capable(struct intel_connector
> > > *connector, bool *capable)
> > > }
> > > mutex_unlock(&dev_priv->display.hdcp.comp_mutex);
> > >
> > > - /* Sink's capability for HDCP2.2 */
> > > - return hdcp->shim->hdcp_2_2_capable(dig_port, capable);
> >
> > Did you miss adding the drm hdcp helper here to check sink capability
> >
> Hey,
> As the flow change and the protocol was split away from the full
> implementation, the function here only checks if the driver supports
> it. the call to sync happens in the helper.

Okay got it,

> > > + return 0;
> > > }
> > >
> > > -static bool intel_hdcp_in_use(struct drm_i915_private *dev_priv,
> > > - enum transcoder cpu_transcoder, enum port
> > > port)
> > > +int intel_hdcp1_check_link(struct drm_connector *drm_connector)
> > > {
> > > - return intel_de_read(dev_priv,
> > > - HDCP_STATUS(dev_priv, cpu_transcoder, port)) &
> > > - HDCP_STATUS_ENC;
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > + struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > + enum transcoder cpu_transcoder = connector-
> > > >hdcp.cpu_transcoder;
> > > + enum port port = dig_port->base.port;
> > > + u32 val;
> > > +
> > > + val = intel_de_read(dev_priv,
> > > + HDCP_STATUS(dev_priv, cpu_transcoder, port));
> > > +
> > > + if (val & HDCP_STATUS_ENC)
> > > + return 0;
> > > +
> > > + return -EINVAL;
> > > }
> > >
> > > static bool intel_hdcp2_in_use(struct drm_i915_private *dev_priv,
> > > @@ -238,27 +191,6 @@ static bool intel_hdcp2_in_use(struct
> > > drm_i915_private *dev_priv,
> > > LINK_ENCRYPTION_STATUS;
> > > }
> > >
> > > -static int intel_hdcp_poll_ksv_fifo(struct intel_digital_port *dig_port,
> > > - const struct intel_hdcp_shim *shim)
> > > -{
> > > - int ret, read_ret;
> > > - bool ksv_ready;
> > > -
> > > - /* Poll for ksv list ready (spec says max time allowed is 5s) */
> > > - ret = __wait_for(read_ret = shim->read_ksv_ready(dig_port,
> > > - &ksv_ready),
> > > - read_ret || ksv_ready, 5 * 1000 * 1000, 1000,
> > > - 100 * 1000);
> > > - if (ret)
> > > - return ret;
> > > - if (read_ret)
> > > - return read_ret;
> > > - if (!ksv_ready)
> > > - return -ETIMEDOUT;
> > > -
> > > - return 0;
> > > -}
> > > -
> > > static bool hdcp_key_loadable(struct drm_i915_private *dev_priv)
> > > {
> > > enum i915_power_well_id id;
> > > @@ -294,11 +226,18 @@ static void intel_hdcp_clear_keys(struct
> > > drm_i915_private *dev_priv)
> > > HDCP_KEY_LOAD_DONE | HDCP_KEY_LOAD_STATUS |
> > > HDCP_FUSE_IN_PROGRESS | HDCP_FUSE_ERROR | HDCP_FUSE_DONE);
> > > }
> > >
> > > -static int intel_hdcp_load_keys(struct drm_i915_private *dev_priv)
> > > +int intel_hdcp_load_keys(struct drm_connector *drm_connector)
> > > {
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > int ret;
> > > u32 val;
> > >
> > > + if (!hdcp_key_loadable(dev_priv)) {
> > > + drm_err(&dev_priv->drm, "HDCP key Load is not
> > > possible\n");
> > > + return -ENXIO;
> > > + }
> > > +
> > > val = intel_de_read(dev_priv, HDCP_KEY_STATUS);
> > > if ((val & HDCP_KEY_LOAD_DONE) && (val &
> > > HDCP_KEY_LOAD_STATUS))
> > > return 0;
> > > @@ -308,8 +247,11 @@ static int intel_hdcp_load_keys(struct
> > > drm_i915_private *dev_priv)
> > > * out of reset. So if Key is not already loaded, its an error state.
> > > */
> > > if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
> > > - if (!(intel_de_read(dev_priv, HDCP_KEY_STATUS) &
> > > HDCP_KEY_LOAD_DONE))
> > > - return -ENXIO;
> > > + if (!(intel_de_read(dev_priv, HDCP_KEY_STATUS) &
> > > + HDCP_KEY_LOAD_DONE)) {
> > > + ret = -ENXIO;
> > > + goto err;
> > > + }
> > >
> > > /*
> > > * Initiate loading the HDCP key from fuses.
> > > @@ -325,7 +267,7 @@ static int intel_hdcp_load_keys(struct
> > > drm_i915_private *dev_priv)
> > > drm_err(&dev_priv->drm,
> > > "Failed to initiate HDCP key load (%d)\n",
> > > ret);
> > > - return ret;
> > > + goto err;
> > > }
> > > } else {
> > > intel_de_write(dev_priv, HDCP_KEY_CONF,
> > > HDCP_KEY_LOAD_TRIGGER);
> > > @@ -335,15 +277,21 @@ static int intel_hdcp_load_keys(struct
> > > drm_i915_private *dev_priv)
> > > ret = __intel_wait_for_register(&dev_priv->uncore,
> > > HDCP_KEY_STATUS,
> > > HDCP_KEY_LOAD_DONE,
> > > HDCP_KEY_LOAD_DONE,
> > > 10, 1, &val);
> > > - if (ret)
> > > - return ret;
> > > - else if (!(val & HDCP_KEY_LOAD_STATUS))
> > > - return -ENXIO;
> > > + if (ret) {
> > > + goto err;
> > > + } else if (!(val & HDCP_KEY_LOAD_STATUS)) {
> > > + ret = -ENXIO;
> > > + goto err;
> > > + }
> > >
> > > /* Send Aksv over to PCH display for use in authentication */
> > > intel_de_write(dev_priv, HDCP_KEY_CONF,
> > > HDCP_AKSV_SEND_TRIGGER);
> > >
> > > return 0;
> > > +
> > > +err:
> > > + intel_hdcp_clear_keys(dev_priv);
> > > + return ret;
> > > }
> > >
> > > /* Returns updated SHA-1 index */
> > > @@ -399,25 +347,21 @@ u32 intel_hdcp_get_repeater_ctl(struct
> > > drm_i915_private *dev_priv,
> > > }
> > > }
> > >
> > > -static
> > > -int intel_hdcp_validate_v_prime(struct intel_connector *connector,
> > > - const struct intel_hdcp_shim *shim,
> > > - u8 *ksv_fifo, u8 num_downstream, u8
> > > *bstatus)
> > > +int intel_hdcp1_store_ksv_fifo(struct drm_connector *drm_connector,
> > > + u8 *ksv_fifo, u8 num_downstream, u8 *bstatus,
> > > + u32 *v_prime)
> > > {
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > enum transcoder cpu_transcoder = connector-
> > > >hdcp.cpu_transcoder;
> > > enum port port = dig_port->base.port;
> > > - u32 vprime, sha_text, sha_leftovers, rep_ctl;
> > > + u32 sha_text, sha_leftovers, rep_ctl;
> > > int ret, i, j, sha_idx;
> > >
> > > /* Process V' values from the receiver */
> > > - for (i = 0; i < DRM_HDCP_V_PRIME_NUM_PARTS; i++) {
> > > - ret = shim->read_v_prime_part(dig_port, i, &vprime);
> > > - if (ret)
> > > - return ret;
> > > - intel_de_write(dev_priv, HDCP_SHA_V_PRIME(i), vprime);
> > > - }
> > > + for (i = 0; i < DRM_HDCP_V_PRIME_NUM_PARTS; i++)
> > > + intel_de_write(dev_priv, HDCP_SHA_V_PRIME(i),
> > > v_prime[i]);
> > >
> > > /*
> > > * We need to write the concatenation of all device KSVs, BINFO (DP)
> > > ||
> > > @@ -642,131 +586,38 @@ int intel_hdcp_validate_v_prime(struct
> > > intel_connector *connector,
> > > return 0;
> > > }
> > >
> > > -/* Implements Part 2 of the HDCP authorization procedure */
> > > -static
> > > -int intel_hdcp_auth_downstream(struct intel_connector *connector)
> > > +int intel_hdcp1_store_receiver_info(struct drm_connector
> > > *drm_connector,
> > > + u32 *ksv, u32 status, u8 caps,
> > > + bool repeater_present)
> > > {
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > - const struct intel_hdcp_shim *shim = connector->hdcp.shim;
> > > - u8 bstatus[2], num_downstream, *ksv_fifo;
> > > - int ret, i, tries = 3;
> > > -
> > > - ret = intel_hdcp_poll_ksv_fifo(dig_port, shim);
> > > - if (ret) {
> > > - drm_dbg_kms(&dev_priv->drm,
> > > - "KSV list failed to become ready (%d)\n", ret);
> > > - return ret;
> > > - }
> > > -
> > > - ret = shim->read_bstatus(dig_port, bstatus);
> > > - if (ret)
> > > - return ret;
> > > -
> > > - if (DRM_HDCP_MAX_DEVICE_EXCEEDED(bstatus[0]) ||
> > > - DRM_HDCP_MAX_CASCADE_EXCEEDED(bstatus[1])) {
> > > - drm_dbg_kms(&dev_priv->drm, "Max Topology Limit
> > > Exceeded\n");
> > > - return -EPERM;
> > > - }
> > > -
> > > - /*
> > > - * When repeater reports 0 device count, HDCP1.4 spec allows
> > > disabling
> > > - * the HDCP encryption. That implies that repeater can't have its own
> > > - * display. As there is no consumption of encrypted content in the
> > > - * repeater with 0 downstream devices, we are failing the
> > > - * authentication.
> > > - */
> > > - num_downstream = DRM_HDCP_NUM_DOWNSTREAM(bstatus[0]);
> > > - if (num_downstream == 0) {
> > > - drm_dbg_kms(&dev_priv->drm,
> > > - "Repeater with zero downstream devices\n");
> > > - return -EINVAL;
> > > - }
> > > -
> > > - ksv_fifo = kcalloc(DRM_HDCP_KSV_LEN, num_downstream,
> > > GFP_KERNEL);
> > > - if (!ksv_fifo) {
> > > - drm_dbg_kms(&dev_priv->drm, "Out of mem: ksv_fifo\n");
> > > - return -ENOMEM;
> > > - }
> > > -
> > > - ret = shim->read_ksv_fifo(dig_port, num_downstream, ksv_fifo);
> > > - if (ret)
> > > - goto err;
> > > -
> > > - if (drm_hdcp_check_ksvs_revoked(&dev_priv->drm, ksv_fifo,
> > > - num_downstream) > 0) {
> > > - drm_err(&dev_priv->drm, "Revoked Ksv(s) in ksv_fifo\n");
> > > - ret = -EPERM;
> > > - goto err;
> > > - }
> > > + enum transcoder cpu_transcoder = connector-
> > > >hdcp.cpu_transcoder;
> > > + enum port port = dig_port->base.port;
> > >
> > > - /*
> > > - * When V prime mismatches, DP Spec mandates re-read of
> > > - * V prime atleast twice.
> > > - */
> > > - for (i = 0; i < tries; i++) {
> > > - ret = intel_hdcp_validate_v_prime(connector, shim,
> > > - ksv_fifo, num_downstream,
> > > - bstatus);
> > > - if (!ret)
> > > - break;
> > > - }
> > > + intel_de_write(dev_priv, HDCP_BKSVLO(dev_priv, cpu_transcoder,
> > > port),
> > > + ksv[0]);
> > > + intel_de_write(dev_priv, HDCP_BKSVHI(dev_priv, cpu_transcoder,
> > > port),
> > > + ksv[1]);
> > >
> > > - if (i == tries) {
> > > - drm_dbg_kms(&dev_priv->drm,
> > > - "V Prime validation failed.(%d)\n", ret);
> > > - goto err;
> > > - }
> > > + if (repeater_present)
> > > + intel_de_write(dev_priv, HDCP_REP_CTL,
> > > + intel_hdcp_get_repeater_ctl(
> > > + dev_priv, cpu_transcoder, port));
> > >
> > > - drm_dbg_kms(&dev_priv->drm, "HDCP is enabled (%d downstream
> > > devices)\n",
> > > - num_downstream);
> > > - ret = 0;
> > > -err:
> > > - kfree(ksv_fifo);
> > > - return ret;
> > > + return 0;
> > > }
> > >
> > > -/* Implements Part 1 of the HDCP authorization procedure */
> > > -static int intel_hdcp_auth(struct intel_connector *connector)
> > > +int intel_hdcp1_read_an(struct drm_connector *drm_connector,
> > > + struct drm_hdcp_an *an)
> > > {
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > - struct intel_hdcp *hdcp = &connector->hdcp;
> > > - const struct intel_hdcp_shim *shim = hdcp->shim;
> > > enum transcoder cpu_transcoder = connector-
> > > >hdcp.cpu_transcoder;
> > > enum port port = dig_port->base.port;
> > > - unsigned long r0_prime_gen_start;
> > > - int ret, i, tries = 2;
> > > - union {
> > > - u32 reg[2];
> > > - u8 shim[DRM_HDCP_AN_LEN];
> > > - } an;
> > > - union {
> > > - u32 reg[2];
> > > - u8 shim[DRM_HDCP_KSV_LEN];
> > > - } bksv;
> > > - union {
> > > - u32 reg;
> > > - u8 shim[DRM_HDCP_RI_LEN];
> > > - } ri;
> > > - bool repeater_present, hdcp_capable;
> > > -
> > > - /*
> > > - * Detects whether the display is HDCP capable. Although we check
> > > for
> > > - * valid Bksv below, the HDCP over DP spec requires that we check
> > > - * whether the display supports HDCP before we write An. For HDMI
> > > - * displays, this is not necessary.
> > > - */
> > > - if (shim->hdcp_capable) {
> > > - ret = shim->hdcp_capable(dig_port, &hdcp_capable);
> > > - if (ret)
> > > - return ret;
> > > - if (!hdcp_capable) {
> > > - drm_dbg_kms(&dev_priv->drm,
> > > - "Panel is not HDCP capable\n");
> > > - return -EINVAL;
> > > - }
> > > - }
> > > + int i;
> > >
> > > /* Initialize An with 2 random values and acquire it */
> > > for (i = 0; i < 2; i++)
> > > @@ -784,92 +635,81 @@ static int intel_hdcp_auth(struct
> intel_connector
> > > *connector)
> > > return -ETIMEDOUT;
> > > }
> > >
> > > - an.reg[0] = intel_de_read(dev_priv,
> > > - HDCP_ANLO(dev_priv, cpu_transcoder,
> > > port));
> > > - an.reg[1] = intel_de_read(dev_priv,
> > > - HDCP_ANHI(dev_priv, cpu_transcoder,
> > > port));
> > > - ret = shim->write_an_aksv(dig_port, an.shim);
> > > - if (ret)
> > > - return ret;
> > > + an->words[0] = intel_de_read(dev_priv,
> > > + HDCP_ANLO(dev_priv, cpu_transcoder,
> > > port));
> > > + an->words[1] = intel_de_read(dev_priv,
> > > + HDCP_ANHI(dev_priv, cpu_transcoder,
> > > port));
> > >
> > > - r0_prime_gen_start = jiffies;
> > > -
> > > - memset(&bksv, 0, sizeof(bksv));
> > > -
> > > - ret = intel_hdcp_read_valid_bksv(dig_port, shim, bksv.shim);
> > > - if (ret < 0)
> > > - return ret;
> > > -
> > > - if (drm_hdcp_check_ksvs_revoked(&dev_priv->drm, bksv.shim, 1) >
> > > 0) {
> > > - drm_err(&dev_priv->drm, "BKSV is revoked\n");
> > > - return -EPERM;
> > > - }
> > > -
> > > - intel_de_write(dev_priv, HDCP_BKSVLO(dev_priv, cpu_transcoder,
> > > port),
> > > - bksv.reg[0]);
> > > - intel_de_write(dev_priv, HDCP_BKSVHI(dev_priv, cpu_transcoder,
> > > port),
> > > - bksv.reg[1]);
> > > -
> > > - ret = shim->repeater_present(dig_port, &repeater_present);
> > > - if (ret)
> > > - return ret;
> > > - if (repeater_present)
> > > - intel_de_write(dev_priv, HDCP_REP_CTL,
> > > - intel_hdcp_get_repeater_ctl(dev_priv,
> > > cpu_transcoder, port));
> > > + return 0;
> > > +}
> > >
> > > - ret = shim->toggle_signalling(dig_port, cpu_transcoder, true);
> > > - if (ret)
> > > - return ret;
> > > +int intel_hdcp1_enable_encryption(struct drm_connector
> > > *drm_connector)
> > > +{
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > + struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > + enum transcoder cpu_transcoder = connector-
> > > >hdcp.cpu_transcoder;
> > > + enum port port = dig_port->base.port;
> > >
> > > intel_de_write(dev_priv, HDCP_CONF(dev_priv, cpu_transcoder,
> > > port),
> > > HDCP_CONF_AUTH_AND_ENC);
> > >
> > > + return 0;
> > > +}
> > > +
> > > +int intel_hdcp1_wait_for_r0(struct drm_connector *drm_connector)
> > > +{
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > + struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > + enum transcoder cpu_transcoder = connector-
> > > >hdcp.cpu_transcoder;
> > > + enum port port = dig_port->base.port;
> > > +
> > > /* Wait for R0 ready */
> > > - if (wait_for(intel_de_read(dev_priv, HDCP_STATUS(dev_priv,
> > > cpu_transcoder, port)) &
> > > - (HDCP_STATUS_R0_READY | HDCP_STATUS_ENC), 1)) {
> > > + if (wait_for((intel_de_read(dev_priv,
> > > + HDCP_STATUS(dev_priv, cpu_transcoder,
> > > + port))) &
> > > + (HDCP_STATUS_R0_READY | HDCP_STATUS_ENC),
> > > + 1)) {
> >
> > Alignment here seem wrong
> >
> > > drm_err(&dev_priv->drm, "Timed out waiting for R0
> > > ready\n");
> > > return -ETIMEDOUT;
> > > }
> > >
> > > - /*
> > > - * Wait for R0' to become available. The spec says 100ms from Aksv,
> > > but
> > > - * some monitors can take longer than this. We'll set the timeout at
> > > - * 300ms just to be sure.
> > > - *
> > > - * On DP, there's an R0_READY bit available but no such bit
> > > - * exists on HDMI. Since the upper-bound is the same, we'll just do
> > > - * the stupid thing instead of polling on one and not the other.
> > > - */
> > > - wait_remaining_ms_from_jiffies(r0_prime_gen_start, 300);
> > > -
> > > - tries = 3;
> > > + return 0;
> > > +}
> > >
> > > - /*
> > > - * DP HDCP Spec mandates the two more reattempt to read R0,
> > > incase
> > > - * of R0 mismatch.
> > > - */
> > > - for (i = 0; i < tries; i++) {
> > > - ri.reg = 0;
> > > - ret = shim->read_ri_prime(dig_port, ri.shim);
> > > - if (ret)
> > > - return ret;
> > > - intel_de_write(dev_priv,
> > > - HDCP_RPRIME(dev_priv, cpu_transcoder, port),
> > > - ri.reg);
> > > +int intel_hdcp1_match_ri(struct drm_connector *drm_connector, u32
> > > ri_prime)
> > > +{
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > + struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > + enum transcoder cpu_transcoder = connector-
> > > >hdcp.cpu_transcoder;
> > > + enum port port = dig_port->base.port;
> > >
> > > - /* Wait for Ri prime match */
> > > - if (!wait_for(intel_de_read(dev_priv,
> > > HDCP_STATUS(dev_priv, cpu_transcoder, port)) &
> > > - (HDCP_STATUS_RI_MATCH |
> > > HDCP_STATUS_ENC), 1))
> > > - break;
> > > - }
> > > + intel_de_write(dev_priv, HDCP_RPRIME(dev_priv, cpu_transcoder,
> > > port),
> > > + ri_prime);
> > >
> > > - if (i == tries) {
> > > - drm_dbg_kms(&dev_priv->drm,
> > > - "Timed out waiting for Ri prime match (%x)\n",
> > > - intel_de_read(dev_priv, HDCP_STATUS(dev_priv,
> > > - cpu_transcoder, port)));
> > > + /* Wait for Ri prime match */
> > > + if (wait_for(intel_de_read(dev_priv,
> > > + HDCP_STATUS(dev_priv, cpu_transcoder,
> > > port)) &
> > > + (HDCP_STATUS_RI_MATCH |
> > > HDCP_STATUS_ENC),
> > > + 1))
> > > return -ETIMEDOUT;
> > > - }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +int intel_hdcp1_post_encryption(struct drm_connector
> *drm_connector)
> > > +{
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > + struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > + enum transcoder cpu_transcoder = connector-
> > > >hdcp.cpu_transcoder;
> > > + enum port port = dig_port->base.port;
> > >
> > > /* Wait for encryption confirmation */
> > > if (intel_de_wait_for_set(dev_priv,
> > > @@ -880,56 +720,22 @@ static int intel_hdcp_auth(struct
> intel_connector
> > > *connector)
> > > return -ETIMEDOUT;
> > > }
> > >
> > > - /* DP MST Auth Part 1 Step 2.a and Step 2.b */
> > > - if (shim->stream_encryption) {
> > > - ret = shim->stream_encryption(connector, true);
> > > - if (ret) {
> > > - drm_err(&dev_priv->drm, "[%s:%d] Failed to enable
> > > HDCP 1.4 stream enc\n",
> > > - connector->base.name, connector-
> > > >base.base.id);
> > > - return ret;
> > > - }
> > > - drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 transcoder: %s
> > > stream encrypted\n",
> > > - transcoder_name(hdcp->stream_transcoder));
> > > - }
> > > -
> > > - if (repeater_present)
> > > - return intel_hdcp_auth_downstream(connector);
> > > -
> > > - drm_dbg_kms(&dev_priv->drm, "HDCP is enabled (no repeater
> > > present)\n");
> > > return 0;
> > > }
> > >
> > > -static int _intel_hdcp_disable(struct intel_connector *connector)
> > > +int intel_hdcp1_disable(struct drm_connector *drm_connector)
> > > {
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > struct intel_hdcp *hdcp = &connector->hdcp;
> > > enum port port = dig_port->base.port;
> > > enum transcoder cpu_transcoder = hdcp->cpu_transcoder;
> > > u32 repeater_ctl;
> > > - int ret;
> > >
> > > drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP is being
> > > disabled...\n",
> > > connector->base.name, connector->base.base.id);
> > >
> > > - if (hdcp->shim->stream_encryption) {
> > > - ret = hdcp->shim->stream_encryption(connector, false);
> > > - if (ret) {
> > > - drm_err(&dev_priv->drm, "[%s:%d] Failed to disable
> > > HDCP 1.4 stream enc\n",
> > > - connector->base.name, connector-
> > > >base.base.id);
> > > - return ret;
> > > - }
> > > - drm_dbg_kms(&dev_priv->drm, "HDCP 1.4 transcoder: %s
> > > stream encryption disabled\n",
> > > - transcoder_name(hdcp->stream_transcoder));
> > > - /*
> > > - * If there are other connectors on this port using HDCP,
> > > - * don't disable it until it disabled HDCP encryption for
> > > - * all connectors in MST topology.
> > > - */
> > > - if (dig_port->num_hdcp_streams > 0)
> > > - return 0;
> > > - }
> > > -
> > > hdcp->hdcp_encrypted = false;
> > > intel_de_write(dev_priv, HDCP_CONF(dev_priv, cpu_transcoder,
> > > port), 0);
> > > if (intel_de_wait_for_clear(dev_priv,
> > > @@ -945,190 +751,9 @@ static int _intel_hdcp_disable(struct
> > > intel_connector *connector)
> > > intel_de_write(dev_priv, HDCP_REP_CTL,
> > > intel_de_read(dev_priv, HDCP_REP_CTL) &
> > > ~repeater_ctl);
> > >
> > > - ret = hdcp->shim->toggle_signalling(dig_port, cpu_transcoder,
> > > false);
> > > - if (ret) {
> > > - drm_err(&dev_priv->drm, "Failed to disable HDCP
> > > signalling\n");
> > > - return ret;
> > > - }
> > > -
> > > - drm_dbg_kms(&dev_priv->drm, "HDCP is disabled\n");
> > > return 0;
> > > }
> > >
> > > -static int _intel_hdcp_enable(struct intel_connector *connector)
> > > -{
> > > - struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > - struct intel_hdcp *hdcp = &connector->hdcp;
> > > - int i, ret, tries = 3;
> > > -
> > > - drm_dbg_kms(&dev_priv->drm, "[%s:%d] HDCP is being
> > > enabled...\n",
> > > - connector->base.name, connector->base.base.id);
> > > -
> > > - if (!hdcp_key_loadable(dev_priv)) {
> > > - drm_err(&dev_priv->drm, "HDCP key Load is not
> > > possible\n");
> > > - return -ENXIO;
> > > - }
> > > -
> > > - for (i = 0; i < KEY_LOAD_TRIES; i++) {
> > > - ret = intel_hdcp_load_keys(dev_priv);
> > > - if (!ret)
> > > - break;
> > > - intel_hdcp_clear_keys(dev_priv);
> > > - }
> > > - if (ret) {
> > > - drm_err(&dev_priv->drm, "Could not load HDCP keys,
> > > (%d)\n",
> > > - ret);
> > > - return ret;
> > > - }
> > > -
> > > - /* Incase of authentication failures, HDCP spec expects reauth. */
> > > - for (i = 0; i < tries; i++) {
> > > - ret = intel_hdcp_auth(connector);
> > > - if (!ret) {
> > > - hdcp->hdcp_encrypted = true;
> > > - return 0;
> > > - }
> > > -
> > > - drm_dbg_kms(&dev_priv->drm, "HDCP Auth failure (%d)\n",
> > > ret);
> > > -
> > > - /* Ensuring HDCP encryption and signalling are stopped. */
> > > - _intel_hdcp_disable(connector);
> > > - }
> > > -
> > > - drm_dbg_kms(&dev_priv->drm,
> > > - "HDCP authentication failed (%d tries/%d)\n", tries, ret);
> > > - return ret;
> > > -}
> > > -
> > > -static struct intel_connector *intel_hdcp_to_connector(struct intel_hdcp
> > > *hdcp)
> > > -{
> > > - return container_of(hdcp, struct intel_connector, hdcp);
> > > -}
> > > -
> > > -static void intel_hdcp_update_value(struct intel_connector *connector,
> > > - u64 value, bool update_property)
> > > -{
> > > - struct drm_device *dev = connector->base.dev;
> > > - struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > - struct intel_hdcp *hdcp = &connector->hdcp;
> > > -
> > > - drm_WARN_ON(connector->base.dev, !mutex_is_locked(&hdcp-
> > > >mutex));
> > > -
> > > - if (hdcp->value == value)
> > > - return;
> > > -
> > > - drm_WARN_ON(dev, !mutex_is_locked(&dig_port->hdcp_mutex));
> > > -
> > > - if (hdcp->value == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
> > > - if (!drm_WARN_ON(dev, dig_port->num_hdcp_streams ==
> > > 0))
> > > - dig_port->num_hdcp_streams--;
> > > - } else if (value == DRM_MODE_CONTENT_PROTECTION_ENABLED) {
> > > - dig_port->num_hdcp_streams++;
> > > - }
> > > -
> > > - hdcp->value = value;
> > > - if (update_property) {
> > > - drm_connector_get(&connector->base);
> > > - schedule_work(&hdcp->prop_work);
> > > - }
> > > -}
> > > -
> > > -/* Implements Part 3 of the HDCP authorization procedure */
> > > -static int intel_hdcp_check_link(struct intel_connector *connector)
> > > -{
> > > - struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > - struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > - struct intel_hdcp *hdcp = &connector->hdcp;
> > > - enum port port = dig_port->base.port;
> > > - enum transcoder cpu_transcoder;
> > > - int ret = 0;
> > > -
> > > - mutex_lock(&hdcp->mutex);
> > > - mutex_lock(&dig_port->hdcp_mutex);
> > > -
> > > - cpu_transcoder = hdcp->cpu_transcoder;
> > > -
> > > - /* Check_link valid only when HDCP1.4 is enabled */
> > > - if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_ENABLED
> > > ||
> > > - !hdcp->hdcp_encrypted) {
> > > - ret = -EINVAL;
> > > - goto out;
> > > - }
> > > -
> > > - if (drm_WARN_ON(&dev_priv->drm,
> > > - !intel_hdcp_in_use(dev_priv, cpu_transcoder,
> > > port))) {
> > > - drm_err(&dev_priv->drm,
> > > - "%s:%d HDCP link stopped encryption,%x\n",
> > > - connector->base.name, connector->base.base.id,
> > > - intel_de_read(dev_priv, HDCP_STATUS(dev_priv,
> > > cpu_transcoder, port)));
> > > - ret = -ENXIO;
> > > - intel_hdcp_update_value(connector,
> > > -
> > > DRM_MODE_CONTENT_PROTECTION_DESIRED,
> > > - true);
> > > - goto out;
> > > - }
> > > -
> > > - if (hdcp->shim->check_link(dig_port, connector)) {
> > > - if (hdcp->value !=
> > > DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
> > > - intel_hdcp_update_value(connector,
> > > -
> > > DRM_MODE_CONTENT_PROTECTION_ENABLED, true);
> > > - }
> > > - goto out;
> > > - }
> > > -
> > > - drm_dbg_kms(&dev_priv->drm,
> > > - "[%s:%d] HDCP link failed, retrying authentication\n",
> > > - connector->base.name, connector->base.base.id);
> > > -
> > > - ret = _intel_hdcp_disable(connector);
> > > - if (ret) {
> > > - drm_err(&dev_priv->drm, "Failed to disable hdcp (%d)\n",
> > > ret);
> > > - intel_hdcp_update_value(connector,
> > > -
> > > DRM_MODE_CONTENT_PROTECTION_DESIRED,
> > > - true);
> > > - goto out;
> > > - }
> > > -
> > > - ret = _intel_hdcp_enable(connector);
> > > - if (ret) {
> > > - drm_err(&dev_priv->drm, "Failed to enable hdcp (%d)\n",
> > > ret);
> > > - intel_hdcp_update_value(connector,
> > > -
> > > DRM_MODE_CONTENT_PROTECTION_DESIRED,
> > > - true);
> > > - goto out;
> > > - }
> > > -
> > > -out:
> > > - mutex_unlock(&dig_port->hdcp_mutex);
> > > - mutex_unlock(&hdcp->mutex);
> > > - return ret;
> > > -}
> > > -
> > > -static void intel_hdcp_prop_work(struct work_struct *work)
> > > -{
> > > - struct intel_hdcp *hdcp = container_of(work, struct intel_hdcp,
> > > - prop_work);
> > > - struct intel_connector *connector = intel_hdcp_to_connector(hdcp);
> > > - struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > -
> > > - drm_modeset_lock(&dev_priv-
> > > >drm.mode_config.connection_mutex, NULL);
> > > - mutex_lock(&hdcp->mutex);
> > > -
> > > - /*
> > > - * This worker is only used to flip between ENABLED/DESIRED. Either
> > > of
> > > - * those to UNDESIRED is handled by core. If value == UNDESIRED,
> > > - * we're running just after hdcp has been disabled, so just exit
> > > - */
> > > - if (hdcp->value !=
> > > DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
> > > - drm_hdcp_update_content_protection(&connector->base,
> > > - hdcp->value);
> > > -
> > > - mutex_unlock(&hdcp->mutex);
> > > - drm_modeset_unlock(&dev_priv-
> > > >drm.mode_config.connection_mutex);
> > > -
> > > - drm_connector_put(&connector->base);
> > > -}
> > > -
> > > bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port
> > > port)
> > > {
> > > return RUNTIME_INFO(dev_priv)->has_hdcp &&
> > > @@ -1961,8 +1586,9 @@ static int
> hdcp2_authenticate_and_encrypt(struct
> > > intel_connector *connector)
> > > return ret;
> > > }
> > >
> > > -static int _intel_hdcp2_enable(struct intel_connector *connector)
> > > +int intel_hdcp2_enable(struct drm_connector *drm_connector)
> > > {
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > struct drm_i915_private *i915 = to_i915(connector->base.dev);
> > > struct intel_hdcp *hdcp = &connector->hdcp;
> > > int ret;
> > > @@ -2024,9 +1650,15 @@ _intel_hdcp2_disable(struct intel_connector
> > > *connector, bool hdcp2_link_recovery
> > > return ret;
> > > }
> > >
> > > +int intel_hdcp2_disable(struct drm_connector *drm_connector)
> > > +{
> > > + return _intel_hdcp2_disable(to_intel_connector(drm_connector),
> > > false);
> > > +}
> > > +
> > > /* Implements the Link Integrity Check for HDCP2.2 */
> > > -static int intel_hdcp2_check_link(struct intel_connector *connector)
> > > +int intel_hdcp2_check_link(struct drm_connector *drm_connector)
> > > {
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > struct intel_hdcp *hdcp = &connector->hdcp;
> > > @@ -2034,109 +1666,39 @@ static int intel_hdcp2_check_link(struct
> > > intel_connector *connector)
> > > enum transcoder cpu_transcoder;
> > > int ret = 0;
> > >
> > > - mutex_lock(&hdcp->mutex);
> > > - mutex_lock(&dig_port->hdcp_mutex);
> > > cpu_transcoder = hdcp->cpu_transcoder;
> > >
> > > /* hdcp2_check_link is expected only when HDCP2.2 is Enabled */
> > > - if (hdcp->value != DRM_MODE_CONTENT_PROTECTION_ENABLED
> > > ||
> > > - !hdcp->hdcp2_encrypted) {
> > > - ret = -EINVAL;
> > > - goto out;
> > > - }
> > > + if (!hdcp->hdcp2_encrypted)
> > > + return -EINVAL;
> > >
> > > if (drm_WARN_ON(&dev_priv->drm,
> > > !intel_hdcp2_in_use(dev_priv, cpu_transcoder,
> > > port))) {
> > > drm_err(&dev_priv->drm,
> > > "HDCP2.2 link stopped the encryption, %x\n",
> > > intel_de_read(dev_priv, HDCP2_STATUS(dev_priv,
> > > cpu_transcoder, port)));
> > > - ret = -ENXIO;
> > > - _intel_hdcp2_disable(connector, true);
> > > - intel_hdcp_update_value(connector,
> > > -
> > > DRM_MODE_CONTENT_PROTECTION_DESIRED,
> > > - true);
> > > - goto out;
> > > + return -ENXIO;
> > > }
> > >
> > > ret = hdcp->shim->check_2_2_link(dig_port, connector);
> > > - if (ret == HDCP_LINK_PROTECTED) {
> > > - if (hdcp->value !=
> > > DRM_MODE_CONTENT_PROTECTION_UNDESIRED) {
> > > - intel_hdcp_update_value(connector,
> > > -
> > > DRM_MODE_CONTENT_PROTECTION_ENABLED,
> > > - true);
> > > - }
> > > - goto out;
> > > - }
> > > + if (ret == HDCP_LINK_PROTECTED)
> > > + return 0;
> > >
> > > if (ret == HDCP_TOPOLOGY_CHANGE) {
> > > - if (hdcp->value ==
> > > DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
> > > - goto out;
> > > -
> > > drm_dbg_kms(&dev_priv->drm,
> > > "HDCP2.2 Downstream topology change\n");
> > > ret = hdcp2_authenticate_repeater_topology(connector);
> > > - if (!ret) {
> > > - intel_hdcp_update_value(connector,
> > > -
> > > DRM_MODE_CONTENT_PROTECTION_ENABLED,
> > > - true);
> > > - goto out;
> > > - }
> > > - drm_dbg_kms(&dev_priv->drm,
> > > - "[%s:%d] Repeater topology auth failed.(%d)\n",
> > > - connector->base.name, connector->base.base.id,
> > > - ret);
> > > - } else {
> > > - drm_dbg_kms(&dev_priv->drm,
> > > - "[%s:%d] HDCP2.2 link failed, retrying auth\n",
> > > - connector->base.name, connector->base.base.id);
> > > - }
> > > -
> > > - ret = _intel_hdcp2_disable(connector, true);
> > > - if (ret) {
> > > - drm_err(&dev_priv->drm,
> > > - "[%s:%d] Failed to disable hdcp2.2 (%d)\n",
> > > - connector->base.name, connector->base.base.id,
> > > ret);
> > > - intel_hdcp_update_value(connector,
> > > -
> > > DRM_MODE_CONTENT_PROTECTION_DESIRED, true);
> > > - goto out;
> > > - }
> > > + if (!ret)
> > > + return 0;
> > >
> > > - ret = _intel_hdcp2_enable(connector);
> > > - if (ret) {
> > > drm_dbg_kms(&dev_priv->drm,
> > > - "[%s:%d] Failed to enable hdcp2.2 (%d)\n",
> > > - connector->base.name, connector->base.base.id,
> > > - ret);
> > > - intel_hdcp_update_value(connector,
> > > -
> > > DRM_MODE_CONTENT_PROTECTION_DESIRED,
> > > - true);
> > > - goto out;
> > > + "[%s:%d] Repeater topology auth failed.(%d)\n",
> > > + connector->base.name, connector->base.base.id,
> > > ret);
> > > }
> > >
> > > -out:
> > > - mutex_unlock(&dig_port->hdcp_mutex);
> > > - mutex_unlock(&hdcp->mutex);
> > > return ret;
> > > }
> >
> > Wouldn't it be better if we used that value in drm_hdcp_helper_data
> rather than getting rid of all these checks
> > As they are needed same thing for other places where the checks are
> removed because value isn't present in
> > Intel_hdcp structure
> >
> I'm not 100% sure I get what you're referring to, but basically the
> work has been split between the helper and the driver. the intel
> specific protocol is what remains in the driver. Everything else is
> handled in the helper

From what I can see all the checks concerning hdcp->value have been removed and not been
Taken care In any of the drm_hdcp_helper function for hdcp2_check_link we can use
The value field here which is store in drm_hdcp_helper_data

> > >
> > > -static void intel_hdcp_check_work(struct work_struct *work)
> > > -{
> > > - struct intel_hdcp *hdcp = container_of(to_delayed_work(work),
> > > - struct intel_hdcp,
> > > - check_work);
> > > - struct intel_connector *connector = intel_hdcp_to_connector(hdcp);
> > > -
> > > - if (drm_connector_is_unregistered(&connector->base))
> > > - return;
> > > -
> > > - if (!intel_hdcp2_check_link(connector))
> > > - schedule_delayed_work(&hdcp->check_work,
> > > - DRM_HDCP2_CHECK_PERIOD_MS);
> > > - else if (!intel_hdcp_check_link(connector))
> > > - schedule_delayed_work(&hdcp->check_work,
> > > - DRM_HDCP_CHECK_PERIOD_MS);
> > > -}
> > > -
> > > static int i915_hdcp_component_bind(struct device *i915_kdev,
> > > struct device *mei_kdev, void *data)
> > > {
> > > @@ -2189,22 +1751,28 @@ static enum mei_fw_tc
> > > intel_get_mei_fw_tc(enum transcoder cpu_transcoder)
> > > }
> > > }
> > >
> > > -static int
> > > -_intel_hdcp_setup(struct intel_connector *connector,
> > > - const struct intel_crtc_state *pipe_config, u8 content_type)
> > > +int intel_hdcp_setup(struct drm_connector *connector,
> > > + struct drm_atomic_state *state)
> > > {
> > > - struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > - struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > - struct intel_hdcp *hdcp = &connector->hdcp;
> > > + struct drm_i915_private *dev_priv = to_i915(connector->dev);
> > > + struct intel_connector *intel_connector =
> > > to_intel_connector(connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(intel_connector);
> > > + struct drm_connector_state *conn_state;
> > > + struct drm_crtc_state *crtc_state;
> > > + struct intel_crtc_state *pipe_config;
> > > + struct intel_hdcp *hdcp = &intel_connector->hdcp;
> > > int ret = 0;
> > >
> > > - if (!connector->encoder) {
> > > + if (!intel_connector->encoder) {
> > > drm_err(&dev_priv->drm, "[%s:%d] encoder is not
> > > initialized\n",
> > > - connector->base.name, connector->base.base.id);
> > > + connector->name, connector->base.id);
> > > return -ENODEV;
> > > }
> > >
> > > - hdcp->content_type = content_type;
> > > + conn_state = drm_atomic_get_new_connector_state(state,
> > > connector);
> > > + crtc_state = drm_atomic_get_new_crtc_state(state, conn_state-
> > > >crtc);
> > > + pipe_config = to_intel_crtc_state(crtc_state);
> > >
> > > if (intel_crtc_has_type(pipe_config, INTEL_OUTPUT_DP_MST)) {
> > > hdcp->cpu_transcoder = pipe_config-
> > > >mst_master_transcoder;
> > > @@ -2321,7 +1889,6 @@ int intel_hdcp_init(struct intel_connector
> > > *connector,
> > > {
> > > struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > struct intel_hdcp *hdcp = &connector->hdcp;
> > > - int ret;
> > >
> > > if (!shim)
> > > return -EINVAL;
> > > @@ -2329,174 +1896,12 @@ int intel_hdcp_init(struct intel_connector
> > > *connector,
> > > if (is_hdcp2_supported(dev_priv))
> > > intel_hdcp2_init(connector, dig_port, shim);
> > >
> > > - ret =
> > > - drm_connector_attach_content_protection_property(&connector-
> > > >base,
> > > - hdcp-
> > > >hdcp2_supported);
> > > - if (ret) {
> > > - hdcp->hdcp2_supported = false;
> > > - kfree(dig_port->hdcp_port_data.streams);
> > > - return ret;
> > > - }
> > > -
> > > hdcp->shim = shim;
> > > - mutex_init(&hdcp->mutex);
> >
> > I don't think removing mutex is a good idea
> >
> The mutex is just moved to the drm hdpc helper. Is there any race
> condition that you might be missing?
> > Regards,
> > Suraj Kandpal
> > > - INIT_DELAYED_WORK(&hdcp->check_work,
> > > intel_hdcp_check_work);
> > > - INIT_WORK(&hdcp->prop_work, intel_hdcp_prop_work);
> > > init_waitqueue_head(&hdcp->cp_irq_queue);
> > >
> > > return 0;
> > > }
> > >
> > > -int intel_hdcp_enable(struct intel_connector *connector,
> > > - const struct intel_crtc_state *pipe_config, u8
> > > content_type)
> > > -{
> > > - struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > - struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > - struct intel_hdcp *hdcp = &connector->hdcp;
> > > - unsigned long check_link_interval =
> > > DRM_HDCP_CHECK_PERIOD_MS;
> > > - bool capable;
> > > - int ret = -EINVAL;
> > > -
> > > - if (!hdcp->shim)
> > > - return -ENOENT;
> > > -
> > > - mutex_lock(&hdcp->mutex);
> > > - mutex_lock(&dig_port->hdcp_mutex);
> > > - drm_WARN_ON(&dev_priv->drm,
> > > - hdcp->value ==
> > > DRM_MODE_CONTENT_PROTECTION_ENABLED);
> > > -
> > > - ret = _intel_hdcp_setup(connector, pipe_config, content_type);
> > > - if (ret)
> > > - goto out;
> > > -
> > > - /*
> > > - * Considering that HDCP2.2 is more secure than HDCP1.4, If the
> > > setup
> > > - * is capable of HDCP2.2, it is preferred to use HDCP2.2.
> > > - */
> > > - ret = intel_hdcp2_capable(connector, &capable);
> > > - if (capable) {
> > > - ret = _intel_hdcp2_enable(connector);
> > > - if (!ret) {
> > > - check_link_interval =
> > > DRM_HDCP2_CHECK_PERIOD_MS;
> > > - goto out;
> > > - }
> > > - }
> > > -
> > > - /*
> > > - * When HDCP2.2 fails and Content Type is not Type1, HDCP1.4 will
> > > - * be attempted.
> > > - */
> > > - ret = intel_hdcp_capable(connector, &capable);
> > > - if (ret)
> > > - goto out;
> > > -
> > > - if (capable && hdcp->content_type !=
> > > DRM_MODE_HDCP_CONTENT_TYPE1)
> > > - ret = _intel_hdcp_enable(connector);
> > > -
> > > -out:
> > > - if (!ret) {
> > > - schedule_delayed_work(&hdcp->check_work,
> > > check_link_interval);
> > > - intel_hdcp_update_value(connector,
> > > -
> > > DRM_MODE_CONTENT_PROTECTION_ENABLED,
> > > - true);
> > > - }
> > > -
> > > - mutex_unlock(&dig_port->hdcp_mutex);
> > > - mutex_unlock(&hdcp->mutex);
> > > - return ret;
> > > -}
> > > -
> > > -int intel_hdcp_disable(struct intel_connector *connector)
> > > -{
> > > - struct intel_digital_port *dig_port =
> > > intel_attached_dig_port(connector);
> > > - struct intel_hdcp *hdcp = &connector->hdcp;
> > > - int ret = 0;
> > > -
> > > - if (!hdcp->shim)
> > > - return -ENOENT;
> > > -
> > > - mutex_lock(&hdcp->mutex);
> > > - mutex_lock(&dig_port->hdcp_mutex);
> > > -
> > > - if (hdcp->value ==
> > > DRM_MODE_CONTENT_PROTECTION_UNDESIRED)
> > > - goto out;
> > > -
> > > - intel_hdcp_update_value(connector,
> > > -
> > > DRM_MODE_CONTENT_PROTECTION_UNDESIRED, false);
> > > - if (hdcp->hdcp2_encrypted)
> > > - ret = _intel_hdcp2_disable(connector, false);
> > > - else if (hdcp->hdcp_encrypted)
> > > - ret = _intel_hdcp_disable(connector);
> > > -
> > > -out:
> > > - mutex_unlock(&dig_port->hdcp_mutex);
> > > - mutex_unlock(&hdcp->mutex);
> > > - cancel_delayed_work_sync(&hdcp->check_work);
> > > - return ret;
> > > -}
> > > -
> > > -void intel_hdcp_update_pipe(struct intel_atomic_state *state,
> > > - struct intel_encoder *encoder,
> > > - const struct intel_crtc_state *crtc_state,
> > > - const struct drm_connector_state *conn_state)
> > > -{
> > > - struct intel_connector *connector =
> > > - to_intel_connector(conn_state->connector);
> > > - struct intel_hdcp *hdcp = &connector->hdcp;
> > > - bool content_protection_type_changed, desired_and_not_enabled
> > > = false;
> > > -
> > > - if (!connector->hdcp.shim)
> > > - return;
> > > -
> > > - content_protection_type_changed =
> > > - (conn_state->hdcp_content_type != hdcp->content_type
> > > &&
> > > - conn_state->content_protection !=
> > > - DRM_MODE_CONTENT_PROTECTION_UNDESIRED);
> > > -
> > > - /*
> > > - * During the HDCP encryption session if Type change is requested,
> > > - * disable the HDCP and reenable it with new TYPE value.
> > > - */
> > > - if (conn_state->content_protection ==
> > > - DRM_MODE_CONTENT_PROTECTION_UNDESIRED ||
> > > - content_protection_type_changed)
> > > - intel_hdcp_disable(connector);
> > > -
> > > - /*
> > > - * Mark the hdcp state as DESIRED after the hdcp disable of type
> > > - * change procedure.
> > > - */
> > > - if (content_protection_type_changed) {
> > > - mutex_lock(&hdcp->mutex);
> > > - hdcp->value =
> > > DRM_MODE_CONTENT_PROTECTION_DESIRED;
> > > - drm_connector_get(&connector->base);
> > > - schedule_work(&hdcp->prop_work);
> > > - mutex_unlock(&hdcp->mutex);
> > > - }
> > > -
> > > - if (conn_state->content_protection ==
> > > - DRM_MODE_CONTENT_PROTECTION_DESIRED) {
> > > - mutex_lock(&hdcp->mutex);
> > > - /* Avoid enabling hdcp, if it already ENABLED */
> > > - desired_and_not_enabled =
> > > - hdcp->value !=
> > > DRM_MODE_CONTENT_PROTECTION_ENABLED;
> > > - mutex_unlock(&hdcp->mutex);
> > > - /*
> > > - * If HDCP already ENABLED and CP property is DESIRED,
> > > schedule
> > > - * prop_work to update correct CP property to user space.
> > > - */
> > > - if (!desired_and_not_enabled &&
> > > !content_protection_type_changed) {
> > > - drm_connector_get(&connector->base);
> > > - schedule_work(&hdcp->prop_work);
> > > - }
> > > - }
> > > -
> > > - if (desired_and_not_enabled || content_protection_type_changed)
> > > - intel_hdcp_enable(connector,
> > > - crtc_state,
> > > - (u8)conn_state->hdcp_content_type);
> > > -}
> > > -
> > > void intel_hdcp_component_fini(struct drm_i915_private *dev_priv)
> > > {
> > > mutex_lock(&dev_priv->display.hdcp.comp_mutex);
> > > @@ -2518,33 +1923,8 @@ void intel_hdcp_cleanup(struct
> intel_connector
> > > *connector)
> > > if (!hdcp->shim)
> > > return;
> > >
> > > - /*
> > > - * If the connector is registered, it's possible userspace could kick
> > > - * off another HDCP enable, which would re-spawn the workers.
> > > - */
> > > - drm_WARN_ON(connector->base.dev,
> > > - connector->base.registration_state ==
> > > DRM_CONNECTOR_REGISTERED);
> > > -
> > > - /*
> > > - * Now that the connector is not registered, check_work won't be
> > > run,
> > > - * but cancel any outstanding instances of it
> > > - */
> > > - cancel_delayed_work_sync(&hdcp->check_work);
> > > -
> > > - /*
> > > - * We don't cancel prop_work in the same way as check_work since it
> > > - * requires connection_mutex which could be held while calling this
> > > - * function. Instead, we rely on the connector references grabbed
> > > before
> > > - * scheduling prop_work to ensure the connector is alive when
> > > prop_work
> > > - * is run. So if we're in the destroy path (which is where this
> > > - * function should be called), we're "guaranteed" that prop_work is
> > > not
> > > - * active (tl;dr This Should Never Happen).
> > > - */
> > > - drm_WARN_ON(connector->base.dev, work_pending(&hdcp-
> > > >prop_work));
> > > -
> > > - mutex_lock(&hdcp->mutex);
> > > + drm_hdcp_helper_destroy(connector->hdcp_helper_data);
> > > hdcp->shim = NULL;
> > > - mutex_unlock(&hdcp->mutex);
> > > }
> > >
> > > /* Handles the CP_IRQ raised from the DP HDCP sink */
> > > @@ -2558,5 +1938,5 @@ void intel_hdcp_handle_cp_irq(struct
> > > intel_connector *connector)
> > > atomic_inc(&connector->hdcp.cp_irq_count);
> > > wake_up_all(&connector->hdcp.cp_irq_queue);
> > >
> > > - schedule_delayed_work(&hdcp->check_work, 0);
> > > + drm_hdcp_helper_schedule_hdcp_check(connector-
> > > >hdcp_helper_data);
> > > }
> > > diff --git a/drivers/gpu/drm/i915/display/intel_hdcp.h
> > > b/drivers/gpu/drm/i915/display/intel_hdcp.h
> > > index f06f6e5a2b1a..49b9d79eb30a 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_hdcp.h
> > > +++ b/drivers/gpu/drm/i915/display/intel_hdcp.h
> > > @@ -10,8 +10,10 @@
> > >
> > > #define HDCP_ENCRYPT_STATUS_CHANGE_TIMEOUT_MS 50
> > >
> > > +struct drm_atomic_state;
> > > struct drm_connector;
> > > struct drm_connector_state;
> > > +struct drm_hdcp_an;
> > > struct drm_i915_private;
> > > struct intel_atomic_state;
> > > struct intel_connector;
> > > @@ -25,16 +27,29 @@ enum transcoder;
> > > int intel_hdcp_init(struct intel_connector *connector,
> > > struct intel_digital_port *dig_port,
> > > const struct intel_hdcp_shim *hdcp_shim);
> > > -int intel_hdcp_enable(struct intel_connector *connector,
> > > - const struct intel_crtc_state *pipe_config, u8
> > > content_type);
> > > -int intel_hdcp_disable(struct intel_connector *connector);
> > > -void intel_hdcp_update_pipe(struct intel_atomic_state *state,
> > > - struct intel_encoder *encoder,
> > > - const struct intel_crtc_state *crtc_state,
> > > - const struct drm_connector_state *conn_state);
> > > +int intel_hdcp_setup(struct drm_connector *drm_connector,
> > > + struct drm_atomic_state *state);
> > > +int intel_hdcp_load_keys(struct drm_connector *drm_connector);
> > > bool is_hdcp_supported(struct drm_i915_private *dev_priv, enum port
> > > port);
> > > int intel_hdcp_capable(struct intel_connector *connector, bool
> *capable);
> > > -int intel_hdcp2_capable(struct intel_connector *connector, bool
> *capable);
> > > +int intel_hdcp2_capable(struct drm_connector *drm_connector, bool
> > > *capable);
> > > +int intel_hdcp2_enable(struct drm_connector *drm_connector);
> > > +int intel_hdcp2_disable(struct drm_connector *drm_connector);
> > > +int intel_hdcp2_check_link(struct drm_connector *drm_connector);
> > > +int intel_hdcp1_store_receiver_info(struct drm_connector
> > > *drm_connector,
> > > + u32 *ksv, u32 status, u8 caps,
> > > + bool repeater_present);
> > > +int intel_hdcp1_read_an(struct drm_connector *drm_connector,
> > > + struct drm_hdcp_an *an);
> > > +int intel_hdcp1_enable_encryption(struct drm_connector
> > > *drm_connector);
> > > +int intel_hdcp1_wait_for_r0(struct drm_connector *drm_connector);
> > > +int intel_hdcp1_match_ri(struct drm_connector *drm_connector, u32
> > > ri_prime);
> > > +int intel_hdcp1_post_encryption(struct drm_connector
> *drm_connector);
> > > +int intel_hdcp1_store_ksv_fifo(struct drm_connector *drm_connector,
> > > + u8 *ksv_fifo, u8 num_downstream, u8 *bstatus,
> > > + u32 *v_prime);
> > > +int intel_hdcp1_check_link(struct drm_connector *drm_connector);
> > > +int intel_hdcp1_disable(struct drm_connector *drm_connector);
> > > void intel_hdcp_component_init(struct drm_i915_private *dev_priv);
> > > void intel_hdcp_component_fini(struct drm_i915_private *dev_priv);
> > > void intel_hdcp_cleanup(struct intel_connector *connector);
> > > diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c
> > > b/drivers/gpu/drm/i915/display/intel_hdmi.c
> > > index 7816b2a33fee..c33cfedb2e19 100644
> > > --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> > > +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> > > @@ -1324,17 +1324,24 @@ static int intel_hdmi_hdcp_write(struct
> > > intel_digital_port *dig_port,
> > > return ret;
> > > }
> > >
> > > -static
> > > -int intel_hdmi_hdcp_write_an_aksv(struct intel_digital_port *dig_port,
> > > - u8 *an)
> > > +static int intel_hdmi_hdcp1_send_an_aksv(struct drm_connector
> > > *drm_connector)
> > > {
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > struct intel_hdmi *hdmi = &dig_port->hdmi;
> > > struct i2c_adapter *adapter = intel_gmbus_get_adapter(i915,
> > > hdmi->ddc_bus);
> > > + struct drm_hdcp_an an;
> > > int ret;
> > >
> > > - ret = intel_hdmi_hdcp_write(dig_port, DRM_HDCP_DDC_AN, an,
> > > + /* Output An first, that's easy */
> > > + ret = intel_hdcp1_read_an(drm_connector, &an);
> > > + if (ret)
> > > + return ret;
> > > +
> > > + ret = intel_hdmi_hdcp_write(dig_port, DRM_HDCP_DDC_AN,
> > > an.bytes,
> > > DRM_HDCP_AN_LEN);
> > > if (ret) {
> > > drm_dbg_kms(&i915->drm, "Write An over DDC failed
> > > (%d)\n",
> > > @@ -1350,120 +1357,6 @@ int intel_hdmi_hdcp_write_an_aksv(struct
> > > intel_digital_port *dig_port,
> > > return 0;
> > > }
> > >
> > > -static int intel_hdmi_hdcp_read_bksv(struct intel_digital_port *dig_port,
> > > - u8 *bksv)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > -
> > > - int ret;
> > > - ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_BKSV, bksv,
> > > - DRM_HDCP_KSV_LEN);
> > > - if (ret)
> > > - drm_dbg_kms(&i915->drm, "Read Bksv over DDC failed
> > > (%d)\n",
> > > - ret);
> > > - return ret;
> > > -}
> > > -
> > > -static
> > > -int intel_hdmi_hdcp_read_bstatus(struct intel_digital_port *dig_port,
> > > - u8 *bstatus)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > -
> > > - int ret;
> > > - ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_BSTATUS,
> > > - bstatus, DRM_HDCP_BSTATUS_LEN);
> > > - if (ret)
> > > - drm_dbg_kms(&i915->drm, "Read bstatus over DDC failed
> > > (%d)\n",
> > > - ret);
> > > - return ret;
> > > -}
> > > -
> > > -static
> > > -int intel_hdmi_hdcp_repeater_present(struct intel_digital_port
> *dig_port,
> > > - bool *repeater_present)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - int ret;
> > > - u8 val;
> > > -
> > > - ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_BCAPS,
> > > &val, 1);
> > > - if (ret) {
> > > - drm_dbg_kms(&i915->drm, "Read bcaps over DDC failed
> > > (%d)\n",
> > > - ret);
> > > - return ret;
> > > - }
> > > - *repeater_present = val &
> > > DRM_HDCP_DDC_BCAPS_REPEATER_PRESENT;
> > > - return 0;
> > > -}
> > > -
> > > -static
> > > -int intel_hdmi_hdcp_read_ri_prime(struct intel_digital_port *dig_port,
> > > - u8 *ri_prime)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > -
> > > - int ret;
> > > - ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_RI_PRIME,
> > > - ri_prime, DRM_HDCP_RI_LEN);
> > > - if (ret)
> > > - drm_dbg_kms(&i915->drm, "Read Ri' over DDC failed
> > > (%d)\n",
> > > - ret);
> > > - return ret;
> > > -}
> > > -
> > > -static
> > > -int intel_hdmi_hdcp_read_ksv_ready(struct intel_digital_port *dig_port,
> > > - bool *ksv_ready)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - int ret;
> > > - u8 val;
> > > -
> > > - ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_BCAPS,
> > > &val, 1);
> > > - if (ret) {
> > > - drm_dbg_kms(&i915->drm, "Read bcaps over DDC failed
> > > (%d)\n",
> > > - ret);
> > > - return ret;
> > > - }
> > > - *ksv_ready = val & DRM_HDCP_DDC_BCAPS_KSV_FIFO_READY;
> > > - return 0;
> > > -}
> > > -
> > > -static
> > > -int intel_hdmi_hdcp_read_ksv_fifo(struct intel_digital_port *dig_port,
> > > - int num_downstream, u8 *ksv_fifo)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - int ret;
> > > - ret = intel_hdmi_hdcp_read(dig_port, DRM_HDCP_DDC_KSV_FIFO,
> > > - ksv_fifo, num_downstream *
> > > DRM_HDCP_KSV_LEN);
> > > - if (ret) {
> > > - drm_dbg_kms(&i915->drm,
> > > - "Read ksv fifo over DDC failed (%d)\n", ret);
> > > - return ret;
> > > - }
> > > - return 0;
> > > -}
> > > -
> > > -static
> > > -int intel_hdmi_hdcp_read_v_prime_part(struct intel_digital_port
> > > *dig_port,
> > > - int i, u32 *part)
> > > -{
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - int ret;
> > > -
> > > - if (i >= DRM_HDCP_V_PRIME_NUM_PARTS)
> > > - return -EINVAL;
> > > -
> > > - ret = intel_hdmi_hdcp_read(dig_port,
> > > DRM_HDCP_DDC_V_PRIME(i),
> > > - part, DRM_HDCP_V_PRIME_PART_LEN);
> > > - if (ret)
> > > - drm_dbg_kms(&i915->drm, "Read V'[%d] over DDC failed
> > > (%d)\n",
> > > - i, ret);
> > > - return ret;
> > > -}
> > > -
> > > static int kbl_repositioning_enc_en_signal(struct intel_connector
> > > *connector,
> > > enum transcoder cpu_transcoder)
> > > {
> > > @@ -1532,50 +1425,40 @@ int intel_hdmi_hdcp_toggle_signalling(struct
> > > intel_digital_port *dig_port,
> > > return 0;
> > > }
> > >
> > > -static
> > > -bool intel_hdmi_hdcp_check_link_once(struct intel_digital_port
> *dig_port,
> > > - struct intel_connector *connector)
> > > +static int
> > > +intel_hdmi_hdcp1_enable_encryption(struct drm_connector
> > > *drm_connector)
> > > {
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - enum port port = dig_port->base.port;
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > enum transcoder cpu_transcoder = connector-
> > > >hdcp.cpu_transcoder;
> > > int ret;
> > > - union {
> > > - u32 reg;
> > > - u8 shim[DRM_HDCP_RI_LEN];
> > > - } ri;
> > >
> > > - ret = intel_hdmi_hdcp_read_ri_prime(dig_port, ri.shim);
> > > + ret = intel_hdmi_hdcp_toggle_signalling(dig_port, cpu_transcoder,
> > > true);
> > > if (ret)
> > > - return false;
> > > -
> > > - intel_de_write(i915, HDCP_RPRIME(i915, cpu_transcoder, port),
> > > ri.reg);
> > > + return ret;
> > >
> > > - /* Wait for Ri prime match */
> > > - if (wait_for((intel_de_read(i915, HDCP_STATUS(i915,
> > > cpu_transcoder, port)) &
> > > - (HDCP_STATUS_RI_MATCH | HDCP_STATUS_ENC)) ==
> > > - (HDCP_STATUS_RI_MATCH | HDCP_STATUS_ENC), 1)) {
> > > - drm_dbg_kms(&i915->drm, "Ri' mismatch detected (%x)\n",
> > > - intel_de_read(i915, HDCP_STATUS(i915,
> > > cpu_transcoder,
> > > - port)));
> > > - return false;
> > > - }
> > > - return true;
> > > + return intel_hdcp1_enable_encryption(drm_connector);
> > > }
> > >
> > > -static
> > > -bool intel_hdmi_hdcp_check_link(struct intel_digital_port *dig_port,
> > > - struct intel_connector *connector)
> > > +static int intel_hdmi_hdcp1_disable(struct drm_connector
> > > *drm_connector)
> > > {
> > > - struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> > > - int retry;
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > + enum transcoder cpu_transcoder = connector-
> > > >hdcp.cpu_transcoder;
> > > + struct drm_i915_private *i915 = to_i915(connector->base.dev);
> > > + int ret;
> > >
> > > - for (retry = 0; retry < 3; retry++)
> > > - if (intel_hdmi_hdcp_check_link_once(dig_port, connector))
> > > - return true;
> > > + ret = intel_hdcp1_disable(drm_connector);
> > > + if (ret) {
> > > + drm_err(&i915->drm, "[%s:%d] Failed to disable HDCP 1.4\n",
> > > + connector->base.name, connector->base.base.id);
> > > + return ret;
> > > + }
> > >
> > > - drm_err(&i915->drm, "Link check failed\n");
> > > - return false;
> > > + return intel_hdmi_hdcp_toggle_signalling(dig_port, cpu_transcoder,
> > > + false);
> > > }
> > >
> > > struct hdcp2_hdmi_msg_timeout {
> > > @@ -1718,9 +1601,8 @@ int intel_hdmi_hdcp2_read_msg(struct
> > > intel_digital_port *dig_port,
> > > return ret;
> > > }
> > >
> > > -static
> > > -int intel_hdmi_hdcp2_check_link(struct intel_digital_port *dig_port,
> > > - struct intel_connector *connector)
> > > +static int intel_hdmi_hdcp2_check_link(struct intel_digital_port
> *dig_port,
> > > + struct intel_connector *connector)
> > > {
> > > u8 rx_status[HDCP_2_2_HDMI_RXSTATUS_LEN];
> > > int ret;
> > > @@ -1741,13 +1623,19 @@ int intel_hdmi_hdcp2_check_link(struct
> > > intel_digital_port *dig_port,
> > > return ret;
> > > }
> > >
> > > -static
> > > -int intel_hdmi_hdcp2_capable(struct intel_digital_port *dig_port,
> > > - bool *capable)
> > > +static int intel_hdmi_hdcp2_capable(struct drm_connector
> > > *drm_connector,
> > > + bool *capable)
> > > {
> > > + struct intel_connector *connector =
> > > to_intel_connector(drm_connector);
> > > + struct intel_digital_port *dig_port =
> > > + intel_attached_dig_port(connector);
> > > u8 hdcp2_version;
> > > int ret;
> > >
> > > + ret = intel_hdcp2_capable(drm_connector, capable);
> > > + if (ret || !capable)
> > > + return ret;
> > > +
> > > *capable = false;
> > > ret = intel_hdmi_hdcp_read(dig_port,
> > > HDCP_2_2_HDMI_REG_VER_OFFSET,
> > > &hdcp2_version, sizeof(hdcp2_version));
> > > @@ -1758,23 +1646,30 @@ int intel_hdmi_hdcp2_capable(struct
> > > intel_digital_port *dig_port,
> > > }
> > >
> > > static const struct intel_hdcp_shim intel_hdmi_hdcp_shim = {
> > > - .write_an_aksv = intel_hdmi_hdcp_write_an_aksv,
> > > - .read_bksv = intel_hdmi_hdcp_read_bksv,
> > > - .read_bstatus = intel_hdmi_hdcp_read_bstatus,
> > > - .repeater_present = intel_hdmi_hdcp_repeater_present,
> > > - .read_ri_prime = intel_hdmi_hdcp_read_ri_prime,
> > > - .read_ksv_ready = intel_hdmi_hdcp_read_ksv_ready,
> > > - .read_ksv_fifo = intel_hdmi_hdcp_read_ksv_fifo,
> > > - .read_v_prime_part = intel_hdmi_hdcp_read_v_prime_part,
> > > .toggle_signalling = intel_hdmi_hdcp_toggle_signalling,
> > > - .check_link = intel_hdmi_hdcp_check_link,
> > > .write_2_2_msg = intel_hdmi_hdcp2_write_msg,
> > > .read_2_2_msg = intel_hdmi_hdcp2_read_msg,
> > > - .check_2_2_link = intel_hdmi_hdcp2_check_link,
> > > - .hdcp_2_2_capable = intel_hdmi_hdcp2_capable,
> > > + .check_2_2_link = intel_hdmi_hdcp2_check_link,
> > > .protocol = HDCP_PROTOCOL_HDMI,
> > > };
> > >
> > > +static const struct drm_hdcp_helper_funcs
> intel_hdmi_hdcp_helper_funcs
> > > = {
> > > + .setup = intel_hdcp_setup,
> > > + .load_keys = intel_hdcp_load_keys,
> > > + .hdcp2_capable = intel_hdmi_hdcp2_capable,
> > > + .hdcp2_enable = intel_hdcp2_enable,
> > > + .hdcp2_check_link = intel_hdcp2_check_link,
> > > + .hdcp2_disable = intel_hdcp2_disable,
> > > + .hdcp1_send_an_aksv = intel_hdmi_hdcp1_send_an_aksv,
> > > + .hdcp1_store_receiver_info = intel_hdcp1_store_receiver_info,
> > > + .hdcp1_enable_encryption = intel_hdmi_hdcp1_enable_encryption,
> > > + .hdcp1_wait_for_r0 = intel_hdcp1_wait_for_r0,
> > > + .hdcp1_match_ri = intel_hdcp1_match_ri,
> > > + .hdcp1_post_encryption = intel_hdcp1_post_encryption,
> > > + .hdcp1_store_ksv_fifo = intel_hdcp1_store_ksv_fifo,
> > > + .hdcp1_disable = intel_hdmi_hdcp1_disable,
> > > +};
> > > +
> > > static int intel_hdmi_source_max_tmds_clock(struct intel_encoder
> > > *encoder)
> > > {
> > > struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> > > @@ -2922,6 +2817,37 @@ void intel_infoframe_init(struct
> intel_digital_port
> > > *dig_port)
> > > }
> > > }
> > >
> > > +static void intel_hdmi_hdcp_init(struct intel_digital_port *dig_port,
> > > + struct intel_connector *connector)
> > > +{
> > > + struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
> > > + struct intel_encoder *intel_encoder = &dig_port->base;
> > > + enum port port = intel_encoder->port;
> > > + struct drm_hdcp_helper_data *data;
> > > + int ret;
> > > +
> > > + if (!is_hdcp_supported(dev_priv, port))
> > > + return;
> > > +
> > > + data = drm_hdcp_helper_initialize_hdmi(
> > > + &connector->base, &intel_hdmi_hdcp_helper_funcs, true);
> > > + if (IS_ERR(data)) {
> > > + drm_dbg_kms(&dev_priv->drm, "HDCP init failed
> > > ret=%ld\n",
> > > + PTR_ERR(data));
> > > + return;
> > > + }
> > > +
> > > + ret = intel_hdcp_init(connector, dig_port, &intel_hdmi_hdcp_shim);
> > > + if (ret) {
> > > + drm_hdcp_helper_destroy(data);
> > > + drm_dbg_kms(&dev_priv->drm, "Intel HDCP init failed
> > > ret=%d\n",
> > > + ret);
> > > + return;
> > > + }
> > > +
> > > + connector->hdcp_helper_data = data;
> > > +}
> > > +
> > > void intel_hdmi_init_connector(struct intel_digital_port *dig_port,
> > > struct intel_connector *intel_connector)
> > > {
> > > @@ -2975,13 +2901,7 @@ void intel_hdmi_init_connector(struct
> > > intel_digital_port *dig_port,
> > > intel_connector_attach_encoder(intel_connector, intel_encoder);
> > > intel_hdmi->attached_connector = intel_connector;
> > >
> > > - if (is_hdcp_supported(dev_priv, port)) {
> > > - int ret = intel_hdcp_init(intel_connector, dig_port,
> > > - &intel_hdmi_hdcp_shim);
> > > - if (ret)
> > > - drm_dbg_kms(&dev_priv->drm,
> > > - "HDCP init failed, skipping.\n");
> > > - }
> > > + intel_hdmi_hdcp_init(dig_port, intel_connector);
> > >
> > > /* For G4X desktop chip, PEG_BAND_GAP_DATA 3:0 must first be
> > > written
> > > * 0xd. Failure to do so will result in spurious interrupts being
> > > --
> > > 2.39.0.246.g2a6d74b583-goog
> >
> I send v7 which should have the comments addressed. Thanks a lot!