[PATCH 10/10] drm/i915: Add privacy-screen support (v3)

[Rajat Jain]

Hello Hans,

Thanks a lot for working on this diligently and getting almost all of
it finally merged!

On Wed, Oct 13, 2021 at 2:59 PM Ville Syrjälä
<ville.syrjala at linux.intel.com> wrote:
>
> On Tue, Oct 05, 2021 at 10:23:22PM +0200, Hans de Goede wrote:
> > Add support for eDP panels with a built-in privacy screen using the
> > new drm_privacy_screen class.
> >
> > Changes in v3:
> > - Move drm_privacy_screen_get() call to intel_ddi_init_dp_connector()
> >
> > Changes in v2:
> > - Call drm_connector_update_privacy_screen() from
> >   intel_enable_ddi_dp() / intel_ddi_update_pipe_dp() instead of adding a
> >   for_each_new_connector_in_state() loop to intel_atomic_commit_tail()
> > - Move the probe-deferral check to the intel_modeset_probe_defer() helper
> >
> > Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> > ---
> >  drivers/gpu/drm/i915/display/intel_atomic.c  |  1 +
> >  drivers/gpu/drm/i915/display/intel_ddi.c     | 16 ++++++++++++++++
> >  drivers/gpu/drm/i915/display/intel_display.c | 10 ++++++++++
> >  3 files changed, 27 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c b/drivers/gpu/drm/i915/display/intel_atomic.c
> > index b4e7ac51aa31..a62550711e98 100644
> > --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> > +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> > @@ -139,6 +139,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
> >           new_conn_state->base.picture_aspect_ratio != old_conn_state->base.picture_aspect_ratio ||
> >           new_conn_state->base.content_type != old_conn_state->base.content_type ||
> >           new_conn_state->base.scaling_mode != old_conn_state->base.scaling_mode ||
> > +         new_conn_state->base.privacy_screen_sw_state != old_conn_state->base.privacy_screen_sw_state ||
> >           !drm_connector_atomic_hdr_metadata_equal(old_state, new_state))
> >               crtc_state->mode_changed = true;
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
> > index 0d4cf7fa8720..272714e07cc6 100644
> > --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> > +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> > @@ -25,6 +25,7 @@
> >   *
> >   */
> >
> > +#include <drm/drm_privacy_screen_consumer.h>
> >  #include <drm/drm_scdc_helper.h>
> >
> >  #include "i915_drv.h"
> > @@ -2946,6 +2947,7 @@ static void intel_enable_ddi_dp(struct intel_atomic_state *state,
> >       if (port == PORT_A && DISPLAY_VER(dev_priv) < 9)
> >               intel_dp_stop_link_train(intel_dp, crtc_state);
> >
> > +     drm_connector_update_privacy_screen(conn_state);
> >       intel_edp_backlight_on(crtc_state, conn_state);
> >
> >       if (!dig_port->lspcon.active || dig_port->dp.has_hdmi_sink)
> > @@ -3161,6 +3163,7 @@ static void intel_ddi_update_pipe_dp(struct intel_atomic_state *state,
> >       intel_drrs_update(intel_dp, crtc_state);
> >
> >       intel_backlight_update(state, encoder, crtc_state, conn_state);
> > +     drm_connector_update_privacy_screen(conn_state);
> >  }
> >
> >  void intel_ddi_update_pipe(struct intel_atomic_state *state,
> > @@ -3979,6 +3982,19 @@ intel_ddi_init_dp_connector(struct intel_digital_port *dig_port)
> >               return NULL;
> >       }
> >
> > +     if (dig_port->base.type == INTEL_OUTPUT_EDP) {
>
> Connector type check would be a bit more consistent with what this is
> about I think. But there's is 1:1 correspondence with the encoder type
> for eDP so not a particularly important point.
>
> Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

I see only 8 out of 10 patches in this series were applied to drm-tip.
I'm curious if there is any reason for which the last 2 patches were
not applied:

[Patch 9/10]: drm/i915: Add intel_modeset_probe_defer() helper
[Patch 10/10]: drm/i915: Add privacy-screen support (v3)

I look forward to getting them merged so that I can use them.

Thanks & Best regards,

Rajat

>
> > +             struct drm_device *dev = dig_port->base.base.dev;
> > +             struct drm_privacy_screen *privacy_screen;
> > +
> > +             privacy_screen = drm_privacy_screen_get(dev->dev, NULL);
> > +             if (!IS_ERR(privacy_screen)) {
> > +                     drm_connector_attach_privacy_screen_provider(&connector->base,
> > +                                                                  privacy_screen);
> > +             } else if (PTR_ERR(privacy_screen) != -ENODEV) {
> > +                     drm_warn(dev, "Error getting privacy-screen\n");
> > +             }
> > +     }
> > +
> >       return connector;
> >  }
> >
> > diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> > index 86dbe366a907..84715a779d9d 100644
> > --- a/drivers/gpu/drm/i915/display/intel_display.c
> > +++ b/drivers/gpu/drm/i915/display/intel_display.c
> > @@ -42,6 +42,7 @@
> >  #include <drm/drm_edid.h>
> >  #include <drm/drm_fourcc.h>
> >  #include <drm/drm_plane_helper.h>
> > +#include <drm/drm_privacy_screen_consumer.h>
> >  #include <drm/drm_probe_helper.h>
> >  #include <drm/drm_rect.h>
> >
> > @@ -12769,6 +12770,8 @@ void intel_modeset_driver_remove_nogem(struct drm_i915_private *i915)
> >
> >  bool intel_modeset_probe_defer(struct pci_dev *pdev)
> >  {
> > +     struct drm_privacy_screen *privacy_screen;
> > +
> >       /*
> >        * apple-gmux is needed on dual GPU MacBook Pro
> >        * to probe the panel if we're the inactive GPU.
> > @@ -12776,6 +12779,13 @@ bool intel_modeset_probe_defer(struct pci_dev *pdev)
> >       if (vga_switcheroo_client_probe_defer(pdev))
> >               return true;
> >
> > +     /* If the LCD panel has a privacy-screen, wait for it */
> > +     privacy_screen = drm_privacy_screen_get(&pdev->dev, NULL);
> > +     if (IS_ERR(privacy_screen) && PTR_ERR(privacy_screen) == -EPROBE_DEFER)
> > +             return true;
> > +
> > +     drm_privacy_screen_put(privacy_screen);
> > +
> >       return false;
> >  }
> >
> > --
> > 2.31.1
>
> --
> Ville Syrjälä
> Intel