On Wed, 2026-03-18 at 14:26 +0530, Animesh Manna wrote: > Add api to check panel replay optimization supported or not to > drm-core DP tunneling framework which can be used by other driver > as well. > > v2: Split generic drm changes from Intel specific changes. [Jouni] > > Suggested-by: Imre Deak <[email protected]> > Signed-off-by: Animesh Manna <[email protected]>
Reviewed-by: Jouni Högander <[email protected]> > --- > drivers/gpu/drm/display/drm_dp_tunnel.c | 17 +++++++++++++++++ > include/drm/display/drm_dp_tunnel.h | 6 ++++++ > 2 files changed, 23 insertions(+) > > diff --git a/drivers/gpu/drm/display/drm_dp_tunnel.c > b/drivers/gpu/drm/display/drm_dp_tunnel.c > index f442430d8de7..39c07cb4123b 100644 > --- a/drivers/gpu/drm/display/drm_dp_tunnel.c > +++ b/drivers/gpu/drm/display/drm_dp_tunnel.c > @@ -149,6 +149,7 @@ struct drm_dp_tunnel { > bool bw_alloc_enabled:1; > bool has_io_error:1; > bool destroyed:1; > + bool pr_optimization_support:1; > }; > > struct drm_dp_tunnel_group_state; > @@ -508,6 +509,8 @@ create_tunnel(struct drm_dp_tunnel_mgr *mgr, > > tunnel->bw_alloc_supported = > tunnel_reg_bw_alloc_supported(regs); > tunnel->bw_alloc_enabled = > tunnel_reg_bw_alloc_enabled(regs); > + tunnel->pr_optimization_support = tunnel_reg(regs, > DP_TUNNELING_CAPABILITIES) & > + > DP_PANEL_REPLAY_OPTIMIZATION_SUPPORT; > > if (!add_tunnel_to_group(mgr, drv_group_id, tunnel)) { > kfree(tunnel); > @@ -1036,6 +1039,20 @@ bool drm_dp_tunnel_bw_alloc_is_enabled(const > struct drm_dp_tunnel *tunnel) > } > EXPORT_SYMBOL(drm_dp_tunnel_bw_alloc_is_enabled); > > +/** > + * drm_dp_tunnel_pr_optimization_supported - Query the PR BW > optimization support > + * @tunnel: Tunnel object > + * > + * Query if the PR BW optimization is supported for @tunnel. > + * > + * Returns %true if the PR BW optimiation is supported for @tunnel. > + */ > +bool drm_dp_tunnel_pr_optimization_supported(const struct > drm_dp_tunnel *tunnel) > +{ > + return tunnel && tunnel->pr_optimization_support; > +} > +EXPORT_SYMBOL(drm_dp_tunnel_pr_optimization_supported); > + > static int clear_bw_req_state(struct drm_dp_aux *aux) > { > u8 bw_req_mask = DP_BW_REQUEST_SUCCEEDED | > DP_BW_REQUEST_FAILED; > diff --git a/include/drm/display/drm_dp_tunnel.h > b/include/drm/display/drm_dp_tunnel.h > index 87212c847915..4aa3ce9fd829 100644 > --- a/include/drm/display/drm_dp_tunnel.h > +++ b/include/drm/display/drm_dp_tunnel.h > @@ -53,6 +53,7 @@ int drm_dp_tunnel_destroy(struct drm_dp_tunnel > *tunnel); > int drm_dp_tunnel_enable_bw_alloc(struct drm_dp_tunnel *tunnel); > int drm_dp_tunnel_disable_bw_alloc(struct drm_dp_tunnel *tunnel); > bool drm_dp_tunnel_bw_alloc_is_enabled(const struct drm_dp_tunnel > *tunnel); > +bool drm_dp_tunnel_pr_optimization_supported(const struct > drm_dp_tunnel *tunnel); > int drm_dp_tunnel_alloc_bw(struct drm_dp_tunnel *tunnel, int bw); > int drm_dp_tunnel_get_allocated_bw(struct drm_dp_tunnel *tunnel); > int drm_dp_tunnel_update_state(struct drm_dp_tunnel *tunnel); > @@ -140,6 +141,11 @@ static inline bool > drm_dp_tunnel_bw_alloc_is_enabled(const struct drm_dp_tunnel > return false; > } > > +static inline bool drm_dp_tunnel_pr_optimization_supported(const > struct drm_dp_tunnel *tunnel) > +{ > + return false; > +} > + > static inline int > drm_dp_tunnel_alloc_bw(struct drm_dp_tunnel *tunnel, int bw) > {
