RE: [PATCH v2 13/21] drm/i915/dp: Add DP tunnel atomic state and check BW limit

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> -----Original Message-----
> From: dri-devel <dri-devel-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Imre
> Deak
> Sent: Wednesday, February 21, 2024 2:49 AM
> To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Subject: [PATCH v2 13/21] drm/i915/dp: Add DP tunnel atomic state and check
> BW limit
> 
> Add the atomic state during a modeset required to enable the DP tunnel BW
> allocation mode on links where such a tunnel was detected. This state applies to
> an already enabled output, the state added for a newly enabled output will be
> computed and added/cleared to/from the atomic state in a follow-up patch.
> 
> v2:
> - s/old_crtc_state/crtc_state in intel_crtc_duplicate_state().
> - Move intel_dp_tunnel_atomic_cleanup_inherited_state() to a follow-up
>   patch adding the corresponding state. (Ville)
> - Move intel_dp_tunnel_atomic_clear_stream_bw() to a follow-up
>   patch adding the corresponding state.

Looks Good to me.
Reviewed-by: Uma Shankar <uma.shankar@xxxxxxxxx>

> Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
> Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
> ---
>  drivers/gpu/drm/i915/display/intel_atomic.c  |  6 ++++++
> drivers/gpu/drm/i915/display/intel_display.c | 12 ++++++++++++
> drivers/gpu/drm/i915/display/intel_link_bw.c |  5 +++++
>  3 files changed, 23 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_atomic.c
> b/drivers/gpu/drm/i915/display/intel_atomic.c
> index 96ab37e158995..798cb90361a83 100644
> --- a/drivers/gpu/drm/i915/display/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/display/intel_atomic.c
> @@ -260,6 +260,10 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
>  	if (crtc_state->post_csc_lut)
>  		drm_property_blob_get(crtc_state->post_csc_lut);
> 
> +	if (crtc_state->dp_tunnel_ref.tunnel)
> +		drm_dp_tunnel_ref_get(crtc_state->dp_tunnel_ref.tunnel,
> +				      &crtc_state->dp_tunnel_ref);
> +
>  	crtc_state->update_pipe = false;
>  	crtc_state->update_m_n = false;
>  	crtc_state->update_lrr = false;
> @@ -311,6 +315,8 @@ intel_crtc_destroy_state(struct drm_crtc *crtc,
> 
>  	__drm_atomic_helper_crtc_destroy_state(&crtc_state->uapi);
>  	intel_crtc_free_hw_state(crtc_state);
> +	if (crtc_state->dp_tunnel_ref.tunnel)
> +		drm_dp_tunnel_ref_put(&crtc_state->dp_tunnel_ref);
>  	kfree(crtc_state);
>  }
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index e1a4200f67a7e..16973ebb7865d 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -33,6 +33,7 @@
>  #include <linux/string_helpers.h>
> 
>  #include <drm/display/drm_dp_helper.h>
> +#include <drm/display/drm_dp_tunnel.h>
>  #include <drm/drm_atomic.h>
>  #include <drm/drm_atomic_helper.h>
>  #include <drm/drm_atomic_uapi.h>
> @@ -73,6 +74,7 @@
>  #include "intel_dp.h"
>  #include "intel_dp_link_training.h"
>  #include "intel_dp_mst.h"
> +#include "intel_dp_tunnel.h"
>  #include "intel_dpll.h"
>  #include "intel_dpll_mgr.h"
>  #include "intel_dpt.h"
> @@ -4490,6 +4492,8 @@ copy_bigjoiner_crtc_state_modeset(struct
> intel_atomic_state *state,
>  	saved_state->crc_enabled = slave_crtc_state->crc_enabled;
> 
>  	intel_crtc_free_hw_state(slave_crtc_state);
> +	if (slave_crtc_state->dp_tunnel_ref.tunnel)
> +		drm_dp_tunnel_ref_put(&slave_crtc_state->dp_tunnel_ref);
>  	memcpy(slave_crtc_state, saved_state, sizeof(*slave_crtc_state));
>  	kfree(saved_state);
> 
> @@ -4505,6 +4509,10 @@ copy_bigjoiner_crtc_state_modeset(struct
> intel_atomic_state *state,
>  		      &master_crtc_state->hw.adjusted_mode);
>  	slave_crtc_state->hw.scaling_filter = master_crtc_state-
> >hw.scaling_filter;
> 
> +	if (master_crtc_state->dp_tunnel_ref.tunnel)
> +		drm_dp_tunnel_ref_get(master_crtc_state-
> >dp_tunnel_ref.tunnel,
> +					&slave_crtc_state->dp_tunnel_ref);
> +
>  	copy_bigjoiner_crtc_state_nomodeset(state, slave_crtc);
> 
>  	slave_crtc_state->uapi.mode_changed = master_crtc_state-
> >uapi.mode_changed;
> @@ -5365,6 +5373,10 @@ static int intel_modeset_pipe(struct
> intel_atomic_state *state,
>  	if (ret)
>  		return ret;
> 
> +	ret = intel_dp_tunnel_atomic_add_state_for_crtc(state, crtc);
> +	if (ret)
> +		return ret;
> +
>  	ret = intel_dp_mst_add_topology_state_for_crtc(state, crtc);
>  	if (ret)
>  		return ret;
> diff --git a/drivers/gpu/drm/i915/display/intel_link_bw.c
> b/drivers/gpu/drm/i915/display/intel_link_bw.c
> index 27ea858897c9f..dfd7d5e23f3fa 100644
> --- a/drivers/gpu/drm/i915/display/intel_link_bw.c
> +++ b/drivers/gpu/drm/i915/display/intel_link_bw.c
> @@ -9,6 +9,7 @@
>  #include "intel_crtc.h"
>  #include "intel_display_types.h"
>  #include "intel_dp_mst.h"
> +#include "intel_dp_tunnel.h"
>  #include "intel_fdi.h"
>  #include "intel_link_bw.h"
> 
> @@ -163,6 +164,10 @@ static int check_all_link_config(struct
> intel_atomic_state *state,
>  	if (ret)
>  		return ret;
> 
> +	ret = intel_dp_tunnel_atomic_check_link(state, limits);
> +	if (ret)
> +		return ret;
> +
>  	ret = intel_fdi_atomic_check_link(state, limits);
>  	if (ret)
>  		return ret;
> --
> 2.39.2





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