From: Archit Taneja <architt@codeaurora.org>
To: Jose Abreu <Jose.Abreu@synopsys.com>
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
"Carlos Palminha" <CARLOS.PALMINHA@synopsys.com>,
"Alexey Brodkin" <Alexey.Brodkin@synopsys.com>,
"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
"Daniel Vetter" <daniel.vetter@ffwll.ch>,
"Dave Airlie" <airlied@linux.ie>,
"Andrzej Hajda" <a.hajda@samsung.com>
Subject: Re: [PATCH v2 7/8] drm: Use mode_valid() in atomic modeset
Date: Wed, 10 May 2017 21:38:00 +0530 [thread overview]
Message-ID: <089951fb-2d89-b874-1e48-5ffbf3a4288d@codeaurora.org> (raw)
In-Reply-To: <61cee0404343a363c459a377d2ff53f5c13b1230.1494347165.git.joabreu@synopsys.com>
On 5/9/2017 10:30 PM, Jose Abreu wrote:
> This patches makes use of the new mode_valid() callbacks introduced
> previously to validate the full video pipeline when modesetting.
>
> This calls the connector->mode_valid(), encoder->mode_valid(),
> bridge->mode_valid() and crtc->mode_valid() so that we can
> make sure that the mode will be accepted in every components.
>
> Signed-off-by: Jose Abreu <joabreu@synopsys.com>
> Cc: Carlos Palminha <palminha@synopsys.com>
> Cc: Alexey Brodkin <abrodkin@synopsys.com>
> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Dave Airlie <airlied@linux.ie>
> Cc: Andrzej Hajda <a.hajda@samsung.com>
> Cc: Archit Taneja <architt@codeaurora.org>
> ---
>
> Changes v1->v2:
> - Removed call to connector->mode_valid (Ville, Daniel)
> - Change function name (Ville)
> - Use for_each_new_connector_in_state (Ville)
> - Do not validate if connector and mode didn't change (Ville)
> - Use new helpers to call mode_valid
>
> drivers/gpu/drm/drm_atomic_helper.c | 75 +++++++++++++++++++++++++++++++++++--
> 1 file changed, 72 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index 8be9719..19d0ea1 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -452,6 +452,69 @@ static int handle_conflicting_encoders(struct drm_atomic_state *state,
> return 0;
> }
>
> +static enum drm_mode_status mode_valid_path(struct drm_connector *connector,
> + struct drm_encoder *encoder,
> + struct drm_crtc *crtc,
> + struct drm_display_mode *mode)
> +{
> + enum drm_mode_status ret;
> +
> + ret = drm_encoder_mode_valid(encoder, mode);
> + if (ret != MODE_OK) {
> + DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] mode_valid() failed\n",
> + encoder->base.id, encoder->name);
> + return ret;
> + }
> +
> + ret = drm_bridge_mode_valid(encoder->bridge, mode);
> + if (ret != MODE_OK) {
> + DRM_DEBUG_ATOMIC("[BRIDGE] mode_valid() failed\n");
> + return ret;
> + }
> +
> + ret = drm_crtc_mode_valid(crtc, mode);
> + if (ret != MODE_OK) {
> + DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode_valid() failed\n",
> + crtc->base.id, crtc->name);
> + return ret;
> + }
> +
> + return ret;
> +}
> +
> +static int
> +mode_valid(struct drm_atomic_state *state)
> +{
> + struct drm_connector_state *conn_state;
> + struct drm_connector *connector;
> + int i;
> +
> + for_each_new_connector_in_state(state, connector, conn_state, i) {
> + struct drm_encoder *encoder = conn_state->best_encoder;
> + struct drm_crtc *crtc = conn_state->crtc;
> + struct drm_crtc_state *crtc_state;
> + enum drm_mode_status mode_status;
> + struct drm_display_mode *mode;
> +
> + if (!crtc || !encoder)
> + continue;
> +
> + crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
> + if (!crtc_state)
> + continue;
> + if (!crtc_state->mode_changed && !crtc_state->connectors_changed)
> + continue;
> +
> + mode = &crtc_state->mode;
> +
> + mode_status = mode_valid_path(connector, encoder, crtc, mode);
> + if (mode_status != MODE_OK)
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> /**
> * drm_atomic_helper_check_modeset - validate state object for modeset changes
> * @dev: DRM device
> @@ -466,13 +529,15 @@ static int handle_conflicting_encoders(struct drm_atomic_state *state,
> * 2. &drm_connector_helper_funcs.atomic_check to validate the connector state.
> * 3. If it's determined a modeset is needed then all connectors on the affected crtc
> * crtc are added and &drm_connector_helper_funcs.atomic_check is run on them.
> - * 4. &drm_bridge_funcs.mode_fixup is called on all encoder bridges.
> - * 5. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state.
> + * 4. &drm_encoder_helper_funcs.mode_valid, &drm_bridge_funcs.mode_valid and
> + * &drm_crtc_helper_funcs.mode_valid are called on the affected components.
> + * 5. &drm_bridge_funcs.mode_fixup is called on all encoder bridges.
> + * 6. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state.
> * This function is only called when the encoder will be part of a configured crtc,
> * it must not be used for implementing connector property validation.
> * If this function is NULL, &drm_atomic_encoder_helper_funcs.mode_fixup is called
> * instead.
> - * 6. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with crtc constraints.
> + * 7. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with crtc constraints.
> *
> * &drm_crtc_state.mode_changed is set when the input mode is changed.
> * &drm_crtc_state.connectors_changed is set when a connector is added or
> @@ -617,6 +682,10 @@ static int handle_conflicting_encoders(struct drm_atomic_state *state,
> return ret;
> }
>
> + ret = mode_valid(state);
> + if (ret)
> + return ret;
> +
Since we've ensured that the modes won't fail, can mode_fixup() and
the mode_fixup() ops for crtc/bridge/encoders be assured to not fail
too? This is assuming that all drivers have moved to using the new
mode_valid() ops correctly.
Thanks,
Archit
> return mode_fixup(state);
> }
> EXPORT_SYMBOL(drm_atomic_helper_check_modeset);
>
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
hosted by The Linux Foundation
next prev parent reply other threads:[~2017-05-10 16:08 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-09 17:00 [PATCH v2 0/8] Introduce new mode validation callbacks Jose Abreu
2017-05-09 17:00 ` [PATCH v2 1/8] drm: Add crtc/encoder/bridge->mode_valid() callbacks Jose Abreu
2017-05-10 8:03 ` Daniel Vetter
2017-05-10 9:05 ` Jose Abreu
2017-05-12 8:24 ` Laurent Pinchart
2017-05-15 6:46 ` Daniel Vetter
2017-05-09 17:00 ` [PATCH v2 2/8] drm: Add drm_crtc_mode_valid() Jose Abreu
2017-05-10 7:59 ` Daniel Vetter
2017-05-10 8:57 ` Jose Abreu
2017-05-10 15:12 ` Daniel Vetter
2017-05-09 17:00 ` [PATCH v2 3/8] drm: Add drm_encoder_mode_valid() Jose Abreu
2017-05-09 17:00 ` [PATCH v2 4/8] drm: Add drm_connector_mode_valid() Jose Abreu
2017-05-09 17:00 ` [PATCH v2 5/8] drm: Use new mode_valid() helpers in connector probe helper Jose Abreu
2017-05-10 8:01 ` Daniel Vetter
2017-05-10 8:59 ` Jose Abreu
2017-05-12 9:35 ` Laurent Pinchart
2017-05-12 16:06 ` Jose Abreu
2017-05-14 11:04 ` Laurent Pinchart
2017-05-15 6:47 ` Daniel Vetter
2017-05-15 7:05 ` Laurent Pinchart
2017-05-16 5:11 ` Jose Abreu
2017-05-09 17:00 ` [PATCH v2 6/8] drm: Introduce drm_bridge_mode_valid() Jose Abreu
2017-05-10 13:41 ` Ville Syrjälä
2017-05-10 14:01 ` Jose Abreu
2017-05-10 14:07 ` Jose Abreu
2017-05-10 15:14 ` Daniel Vetter
2017-05-12 9:38 ` Laurent Pinchart
2017-05-12 10:50 ` Archit Taneja
2017-05-12 11:01 ` Laurent Pinchart
2017-05-15 4:18 ` Archit Taneja
2017-05-15 6:49 ` Daniel Vetter
2017-05-09 17:00 ` [PATCH v2 7/8] drm: Use mode_valid() in atomic modeset Jose Abreu
2017-05-10 16:08 ` Archit Taneja [this message]
2017-05-10 17:55 ` Daniel Vetter
2017-05-12 9:53 ` Laurent Pinchart
2017-05-15 6:50 ` Daniel Vetter
2017-05-09 17:00 ` [PATCH v2 8/8] drm: arc: Use crtc->mode_valid() callback Jose Abreu
2017-05-12 9:57 ` Laurent Pinchart
2017-05-15 1:40 ` Jose Abreu
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