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 <hdego...@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.syrj...@linux.intel.com>
> + 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
