linux-kernel - Re: [PATCH v5 03/10] drm/msm/dp: use atomic callbacks for DP bridge ops

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Date:   Mon, 11 Jul 2022 13:10:40 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Vinod Polimera <quic_vpolimer@...cinc.com>,
        dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, robdclark@...il.com,
        dianders@...omium.org, swboyd@...omium.org,
        quic_kalyant@...cinc.com, quic_khsieh@...cinc.com,
        quic_vproddut@...cinc.com, bjorn.andersson@...aro.org,
        quic_aravindh@...cinc.com, quic_abhinavk@...cinc.com,
        quic_sbillaka@...cinc.com
Subject: Re: [PATCH v5 03/10] drm/msm/dp: use atomic callbacks for DP bridge
 ops

On 11/07/2022 12:47, Vinod Polimera wrote:
> Use atomic variants for DP bridge callback functions so that
> the atomic state can be accessed in the interface drivers.
> The atomic state will help the driver find out if the display
> is in self refresh state.
> 
> Signed-off-by: Sankeerth Billakanti <quic_sbillaka@...cinc.com>
> Signed-off-by: Vinod Polimera <quic_vpolimer@...cinc.com>
> ---
>   drivers/gpu/drm/msm/dp/dp_display.c |  9 ++++++---
>   drivers/gpu/drm/msm/dp/dp_drm.c     | 18 +++++++++++-------
>   2 files changed, 17 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
> index bce7793..5bd6677 100644
> --- a/drivers/gpu/drm/msm/dp/dp_display.c
> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
> @@ -1652,7 +1652,8 @@ int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
>   	return 0;
>   }
>   
> -void dp_bridge_enable(struct drm_bridge *drm_bridge)
> +void dp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
> +			     struct drm_bridge_state *old_bridge_state)
>   {
>   	struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
>   	struct msm_dp *dp = dp_bridge->dp_display;
> @@ -1716,7 +1717,8 @@ void dp_bridge_enable(struct drm_bridge *drm_bridge)
>   	mutex_unlock(&dp_display->event_mutex);
>   }
>   
> -void dp_bridge_disable(struct drm_bridge *drm_bridge)
> +void dp_bridge_atomic_disable(struct drm_bridge *drm_bridge,
> +			      struct drm_bridge_state *old_bridge_state)
>   {
>   	struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
>   	struct msm_dp *dp = dp_bridge->dp_display;
> @@ -1727,7 +1729,8 @@ void dp_bridge_disable(struct drm_bridge *drm_bridge)
>   	dp_ctrl_push_idle(dp_display->ctrl);
>   }
>   
> -void dp_bridge_post_disable(struct drm_bridge *drm_bridge)
> +void dp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge,
> +				   struct drm_bridge_state *old_bridge_state)
>   {
>   	struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
>   	struct msm_dp *dp = dp_bridge->dp_display;
> diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
> index 62d58b9..9d0fc74 100644
> --- a/drivers/gpu/drm/msm/dp/dp_drm.c
> +++ b/drivers/gpu/drm/msm/dp/dp_drm.c
> @@ -61,13 +61,17 @@ static int dp_bridge_get_modes(struct drm_bridge *bridge, struct drm_connector *
>   }
>   
>   static const struct drm_bridge_funcs dp_bridge_ops = {
> -	.enable       = dp_bridge_enable,
> -	.disable      = dp_bridge_disable,
> -	.post_disable = dp_bridge_post_disable,
> -	.mode_set     = dp_bridge_mode_set,
> -	.mode_valid   = dp_bridge_mode_valid,
> -	.get_modes    = dp_bridge_get_modes,
> -	.detect       = dp_bridge_detect,
> +	.atomic_enable = dp_bridge_atomic_enable,
> +	.atomic_disable = dp_bridge_atomic_disable,
> +	.atomic_post_disable = dp_bridge_atomic_post_disable,
> +	.mode_set = dp_bridge_mode_set,
> +	.mode_valid = dp_bridge_mode_valid,
> +	.get_modes = dp_bridge_get_modes,
> +	.detect = dp_bridge_detect,
> +	.atomic_reset = drm_atomic_helper_bridge_reset,
> +	.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
> +	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
> +	.atomic_check = edp_bridge_atomic_check,

This function does not exist (yet). Please move this line to the 
corresponding patch.

>   };
>   
>   struct drm_bridge *dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,


-- 
With best wishes
Dmitry