Re: [PATCH v3 04/10] drm: Convert connector_helper_funcs->atomic_check to accept drm_atomic_state

From: Laurent Pinchart
Date: Sat May 11 2019 - 15:13:57 EST

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Hi Sean,

Thank you for the patch.

On Thu, May 02, 2019 at 03:49:46PM -0400, Sean Paul wrote:
> From: Sean Paul <seanpaul@xxxxxxxxxxxx>
>
> Everyone who implements connector_helper_funcs->atomic_check reaches
> into the connector state to get the atomic state. Instead of continuing
> this pattern, change the callback signature to just give atomic state
> and let the driver determine what it does and does not need from it.
>
> Eventually all atomic functions should do this, but that's just too much
> busy work for me.

Given that drivers also access the connector state, isn't this slightly
more inefficient ?

> Changes in v3:
> - Added to the set
>
> Cc: Daniel Vetter <daniel@xxxxxxxx>
> Cc: Ville SyrjÃlÃ <ville.syrjala@xxxxxxxxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>
> Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> Cc: Ben Skeggs <bskeggs@xxxxxxxxxx>
> Cc: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
> Cc: Kieran Bingham <kieran.bingham+renesas@xxxxxxxxxxxxxxxx>
> Cc: Eric Anholt <eric@xxxxxxxxxx>
> Signed-off-by: Sean Paul <seanpaul@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/drm_atomic_helper.c | 4 ++--
> drivers/gpu/drm/i915/intel_atomic.c | 8 +++++---
> drivers/gpu/drm/i915/intel_dp_mst.c | 7 ++++---
> drivers/gpu/drm/i915/intel_drv.h | 2 +-
> drivers/gpu/drm/i915/intel_sdvo.c | 9 +++++----
> drivers/gpu/drm/i915/intel_tv.c | 8 +++++---
> drivers/gpu/drm/nouveau/dispnv50/disp.c | 5 +++--
> drivers/gpu/drm/rcar-du/rcar_lvds.c | 12 +++++++-----
> drivers/gpu/drm/vc4/vc4_txp.c | 7 ++++---
> include/drm/drm_modeset_helper_vtables.h | 2 +-
> 10 files changed, 37 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
> index 9d9e47276839..fa5a367507c1 100644
> --- a/drivers/gpu/drm/drm_atomic_helper.c
> +++ b/drivers/gpu/drm/drm_atomic_helper.c
> @@ -683,7 +683,7 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
> }
>
> if (funcs->atomic_check)
> - ret = funcs->atomic_check(connector, new_connector_state);
> + ret = funcs->atomic_check(connector, state);
> if (ret)
> return ret;
>
> @@ -725,7 +725,7 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
> continue;
>
> if (funcs->atomic_check)
> - ret = funcs->atomic_check(connector, new_connector_state);
> + ret = funcs->atomic_check(connector, state);
> if (ret)
> return ret;
> }
> diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
> index b844e8840c6f..e8a5b82e9242 100644
> --- a/drivers/gpu/drm/i915/intel_atomic.c
> +++ b/drivers/gpu/drm/i915/intel_atomic.c
> @@ -103,12 +103,14 @@ int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
> }
>
> int intel_digital_connector_atomic_check(struct drm_connector *conn,
> - struct drm_connector_state *new_state)
> + struct drm_atomic_state *state)
> {
> + struct drm_connector_state *new_state =
> + drm_atomic_get_new_connector_state(state, conn);
> struct intel_digital_connector_state *new_conn_state =
> to_intel_digital_connector_state(new_state);
> struct drm_connector_state *old_state =
> - drm_atomic_get_old_connector_state(new_state->state, conn);
> + drm_atomic_get_old_connector_state(state, conn);
> struct intel_digital_connector_state *old_conn_state =
> to_intel_digital_connector_state(old_state);
> struct drm_crtc_state *crtc_state;
> @@ -118,7 +120,7 @@ int intel_digital_connector_atomic_check(struct drm_connector *conn,
> if (!new_state->crtc)
> return 0;
>
> - crtc_state = drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
> + crtc_state = drm_atomic_get_new_crtc_state(state, new_state->crtc);
>
> /*
> * These properties are handled by fastset, and might not end
> diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
> index 19d81cef2ab6..89cfec128ba0 100644
> --- a/drivers/gpu/drm/i915/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
> @@ -143,9 +143,10 @@ static int intel_dp_mst_compute_config(struct intel_encoder *encoder,
>
> static int
> intel_dp_mst_atomic_check(struct drm_connector *connector,
> - struct drm_connector_state *new_conn_state)
> + struct drm_atomic_state *state)
> {
> - struct drm_atomic_state *state = new_conn_state->state;
> + struct drm_connector_state *new_conn_state =
> + drm_atomic_get_new_connector_state(state, connector);
> struct drm_connector_state *old_conn_state =
> drm_atomic_get_old_connector_state(state, connector);
> struct intel_connector *intel_connector =
> @@ -155,7 +156,7 @@ intel_dp_mst_atomic_check(struct drm_connector *connector,
> struct drm_dp_mst_topology_mgr *mgr;
> int ret;
>
> - ret = intel_digital_connector_atomic_check(connector, new_conn_state);
> + ret = intel_digital_connector_atomic_check(connector, state);
> if (ret)
> return ret;
>
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index f8c7b291fdc3..88571b8e8d62 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -2481,7 +2481,7 @@ int intel_digital_connector_atomic_set_property(struct drm_connector *connector,
> struct drm_property *property,
> u64 val);
> int intel_digital_connector_atomic_check(struct drm_connector *conn,
> - struct drm_connector_state *new_state);
> + struct drm_atomic_state *state);
> struct drm_connector_state *
> intel_digital_connector_duplicate_state(struct drm_connector *connector);
>
> diff --git a/drivers/gpu/drm/i915/intel_sdvo.c b/drivers/gpu/drm/i915/intel_sdvo.c
> index 68f497493d43..72ea164b971c 100644
> --- a/drivers/gpu/drm/i915/intel_sdvo.c
> +++ b/drivers/gpu/drm/i915/intel_sdvo.c
> @@ -2342,9 +2342,10 @@ static const struct drm_connector_funcs intel_sdvo_connector_funcs = {
> };
>
> static int intel_sdvo_atomic_check(struct drm_connector *conn,
> - struct drm_connector_state *new_conn_state)
> + struct drm_atomic_state *state)
> {
> - struct drm_atomic_state *state = new_conn_state->state;
> + struct drm_connector_state *new_conn_state =
> + drm_atomic_get_new_connector_state(state, conn);
> struct drm_connector_state *old_conn_state =
> drm_atomic_get_old_connector_state(state, conn);
> struct intel_sdvo_connector_state *old_state =
> @@ -2356,13 +2357,13 @@ static int intel_sdvo_atomic_check(struct drm_connector *conn,
> (memcmp(&old_state->tv, &new_state->tv, sizeof(old_state->tv)) ||
> memcmp(&old_conn_state->tv, &new_conn_state->tv, sizeof(old_conn_state->tv)))) {
> struct drm_crtc_state *crtc_state =
> - drm_atomic_get_new_crtc_state(new_conn_state->state,
> + drm_atomic_get_new_crtc_state(state,
> new_conn_state->crtc);
>
> crtc_state->connectors_changed = true;
> }
>
> - return intel_digital_connector_atomic_check(conn, new_conn_state);
> + return intel_digital_connector_atomic_check(conn, state);
> }
>
> static const struct drm_connector_helper_funcs intel_sdvo_connector_helper_funcs = {
> diff --git a/drivers/gpu/drm/i915/intel_tv.c b/drivers/gpu/drm/i915/intel_tv.c
> index 3924c4944e1f..a41c5b467c14 100644
> --- a/drivers/gpu/drm/i915/intel_tv.c
> +++ b/drivers/gpu/drm/i915/intel_tv.c
> @@ -1817,16 +1817,18 @@ static const struct drm_connector_funcs intel_tv_connector_funcs = {
> };
>
> static int intel_tv_atomic_check(struct drm_connector *connector,
> - struct drm_connector_state *new_state)
> + struct drm_atomic_state *state)
> {
> + struct drm_connector_state *new_state;
> struct drm_crtc_state *new_crtc_state;
> struct drm_connector_state *old_state;
>
> + new_state = drm_atomic_get_new_connector_state(state, connector);
> if (!new_state->crtc)
> return 0;
>
> - old_state = drm_atomic_get_old_connector_state(new_state->state, connector);
> - new_crtc_state = drm_atomic_get_new_crtc_state(new_state->state, new_state->crtc);
> + old_state = drm_atomic_get_old_connector_state(state, connector);
> + new_crtc_state = drm_atomic_get_new_crtc_state(state, new_state->crtc);
>
> if (old_state->tv.mode != new_state->tv.mode ||
> old_state->tv.margins.left != new_state->tv.margins.left ||
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> index 4b1650f51955..7ba373f493b2 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> @@ -948,11 +948,12 @@ nv50_mstc_get_modes(struct drm_connector *connector)
>
> static int
> nv50_mstc_atomic_check(struct drm_connector *connector,
> - struct drm_connector_state *new_conn_state)
> + struct drm_atomic_state *state)
> {
> - struct drm_atomic_state *state = new_conn_state->state;
> struct nv50_mstc *mstc = nv50_mstc(connector);
> struct drm_dp_mst_topology_mgr *mgr = &mstc->mstm->mgr;
> + struct drm_connector_state *new_conn_state =
> + drm_atomic_get_new_connector_state(state, connector);
> struct drm_connector_state *old_conn_state =
> drm_atomic_get_old_connector_state(state, connector);
> struct drm_crtc_state *crtc_state;
> diff --git a/drivers/gpu/drm/rcar-du/rcar_lvds.c b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> index 620b51aab291..5b81ba2a7f27 100644
> --- a/drivers/gpu/drm/rcar-du/rcar_lvds.c
> +++ b/drivers/gpu/drm/rcar-du/rcar_lvds.c
> @@ -92,13 +92,15 @@ static int rcar_lvds_connector_get_modes(struct drm_connector *connector)
> }
>
> static int rcar_lvds_connector_atomic_check(struct drm_connector *connector,
> - struct drm_connector_state *state)
> + struct drm_atomic_state *state)
> {
> struct rcar_lvds *lvds = connector_to_rcar_lvds(connector);
> const struct drm_display_mode *panel_mode;
> + struct drm_connector_state *conn_state;
> struct drm_crtc_state *crtc_state;
>
> - if (!state->crtc)
> + conn_state = drm_atomic_get_new_connector_state(state, connector);
> + if (!conn_state->crtc)
> return 0;
>
> if (list_empty(&connector->modes)) {
> @@ -110,9 +112,9 @@ static int rcar_lvds_connector_atomic_check(struct drm_connector *connector,
> struct drm_display_mode, head);
>
> /* We're not allowed to modify the resolution. */
> - crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
> - if (IS_ERR(crtc_state))
> - return PTR_ERR(crtc_state);
> + crtc_state = drm_atomic_get_crtc_state(state, conn_state->crtc);
> + if (!crtc_state)
> + return -EINVAL;
>
> if (crtc_state->mode.hdisplay != panel_mode->hdisplay ||
> crtc_state->mode.vdisplay != panel_mode->vdisplay)
> diff --git a/drivers/gpu/drm/vc4/vc4_txp.c b/drivers/gpu/drm/vc4/vc4_txp.c
> index c8b89a78f9f4..96f91c1b4b6e 100644
> --- a/drivers/gpu/drm/vc4/vc4_txp.c
> +++ b/drivers/gpu/drm/vc4/vc4_txp.c
> @@ -221,17 +221,18 @@ static const u32 txp_fmts[] = {
> };
>
> static int vc4_txp_connector_atomic_check(struct drm_connector *conn,
> - struct drm_connector_state *conn_state)
> + struct drm_atomic_state *state)
> {
> + struct drm_connector_state *conn_state;
> struct drm_crtc_state *crtc_state;
> struct drm_framebuffer *fb;
> int i;
>
> + conn_state = drm_atomic_get_new_connector_state(state, conn);
> if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
> return 0;
>
> - crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
> - conn_state->crtc);
> + crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
>
> fb = conn_state->writeback_job->fb;
> if (fb->width != crtc_state->mode.hdisplay ||
> diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h
> index de57fb40cb6e..adc8b7cf64b5 100644
> --- a/include/drm/drm_modeset_helper_vtables.h
> +++ b/include/drm/drm_modeset_helper_vtables.h
> @@ -1020,7 +1020,7 @@ struct drm_connector_helper_funcs {
> * deadlock.
> */
> int (*atomic_check)(struct drm_connector *connector,
> - struct drm_connector_state *state);
> + struct drm_atomic_state *state);
>
> /**
> * @atomic_commit:

--
Regards,

Laurent Pinchart

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