Re: [PATCH v2 RFC 4/5] drm/i915: make plane helpers fully atomic

Ander Conselvan De Oliveira
2015-04-24T08:52:05Z

On Thu, 2015-04-23 at 08:19 +0200, Maarten Lankhorst wrote:
> This kills off most of the transitional sers and uses atomic plane updates
> in the modeset path to update everything.
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
> ---
> Changes since v1:
> - Add atomic and sprite planes during a modeset too so they
> will be restored.
> - Drop a WARN_ON(!crtc_state->enabled) in atomic_plane_check for
> cursor and sprite planes. Keep it for primary as this probably
> indicates we messed up somewhere.
>
> drivers/gpu/drm/i915/intel_atomic_plane.c | 58 ++--
> drivers/gpu/drm/i915/intel_display.c | 485 +++++++++++++++++++++---------
> drivers/gpu/drm/i915/intel_sprite.c | 33 +-
> 3 files changed, 366 insertions(+), 210 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c
> index f7bd3b8fa245..ba4ab392b6b0 100644
> --- a/drivers/gpu/drm/i915/intel_atomic_plane.c
> +++ b/drivers/gpu/drm/i915/intel_atomic_plane.c
> @@ -110,32 +110,40 @@ static int intel_plane_atomic_check(struct drm_plane *plane,
> struct drm_plane_state *state)
> {
> struct drm_crtc *crtc = state->crtc;
> - struct intel_crtc *intel_crtc;
> - struct intel_crtc_state *crtc_state;
> + struct drm_crtc_state *crtc_state;
> struct intel_plane *intel_plane = to_intel_plane(plane);
> struct intel_plane_state *intel_state = to_intel_plane_state(state);
>
> - crtc = crtc ? crtc : plane->crtc;
> - intel_crtc = to_intel_crtc(crtc);
> -
> + intel_state->visible = false;
> /*
> * Both crtc and plane->crtc could be NULL if we're updating a
> * property while the plane is disabled. We don't actually have
> * anything driver-specific we need to test in that case, so
> * just return success.
> */
> - if (!crtc)
> + if (!crtc) {
> + DRM_DEBUG_ATOMIC("Invisible: no crtc\n");
> return 0;
> + }
> +
> + crtc_state = state->state->crtc_states[drm_crtc_index(crtc)];
> + if (WARN_ON(!crtc_state))
> + return 0;
> +
> + if (!crtc_state->enable) {
> + DRM_DEBUG_ATOMIC("Invisible: crtc off\n");
>
> - /* FIXME: temporary hack necessary while we still use the plane update
> - * helper. */
> - if (state->state) {
> - crtc_state =
> - intel_atomic_get_crtc_state(state->state, intel_crtc);
> - if (IS_ERR(crtc_state))
> - return PTR_ERR(crtc_state);
> - } else {
> - crtc_state = intel_crtc->config;
> + /*
> + * Probably allowed after converting to atomic. Right
> + * now it probably means we have the state confused.
> + */
> + I915_STATE_WARN_ON(plane->type == DRM_PLANE_TYPE_PRIMARY);
> + return 0;
> + }
> +
> + if (!crtc_state->active) {
> + DRM_DEBUG_ATOMIC("Invisible: dpms off\n");
> + return 0;
> }
>
> /*
> @@ -155,24 +163,8 @@ static int intel_plane_atomic_check(struct drm_plane *plane,
> /* Clip all planes to CRTC size, or 0x0 if CRTC is disabled */
> intel_state->clip.x1 = 0;
> intel_state->clip.y1 = 0;
> - intel_state->clip.x2 =
> - crtc_state->base.active ? crtc_state->pipe_src_w : 0;
> - intel_state->clip.y2 =
> - crtc_state->base.active ? crtc_state->pipe_src_h : 0;
> -
> - /*
> - * Disabling a plane is always okay; we just need to update
> - * fb tracking in a special way since cleanup_fb() won't
> - * get called by the plane helpers.
> - */
> - if (state->fb == NULL && plane->state->fb != NULL) {
> - /*
> - * 'prepare' is never called when plane is being disabled, so
> - * we need to handle frontbuffer tracking as a special case
> - */
> - intel_crtc->atomic.disabled_planes |=
> - (1 << drm_plane_index(plane));
> - }
> + intel_state->clip.x2 = to_intel_crtc_state(crtc_state)->pipe_src_w;
> + intel_state->clip.y2 = to_intel_crtc_state(crtc_state)->pipe_src_h;
>
> if (state->fb && intel_rotation_90_or_270(state->rotation)) {
> if (!(state->fb->modifier[0] == I915_FORMAT_MOD_Y_TILED ||
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 2ffacb4c3a12..acb5c5bea428 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -100,12 +100,16 @@ static void vlv_prepare_pll(struct intel_crtc *crtc,
> const struct intel_crtc_state *pipe_config);
> static void chv_prepare_pll(struct intel_crtc *crtc,
> const struct intel_crtc_state *pipe_config);
> +static int intel_atomic_check_crtc(struct drm_crtc *crtc,
> + struct drm_crtc_state *crtc_state);
> static void intel_begin_crtc_commit(struct drm_crtc *crtc);
> static void intel_finish_crtc_commit(struct drm_crtc *crtc);
> static void skl_init_scalers(struct drm_device *dev, struct intel_crtc *intel_crtc,
> struct intel_crtc_state *crtc_state);
> static void intel_crtc_enable_planes(struct drm_crtc *crtc);
> static void intel_crtc_disable_planes(struct drm_crtc *crtc);
> +static void intel_pre_disable_primary(struct drm_crtc *crtc);
> +static void intel_post_enable_primary(struct drm_crtc *crtc);
>
> static struct intel_encoder *intel_find_encoder(struct intel_connector *connector, int pipe)
> {
> @@ -3056,11 +3060,20 @@ intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
> {
> struct drm_device *dev = crtc->dev;
> struct drm_i915_private *dev_priv = dev->dev_private;
> + struct intel_plane_state *plane_state =
> + to_intel_plane_state(crtc->primary->state);
> + bool was_visible = plane_state->visible;
>
> - if (dev_priv->display.disable_fbc)
> + /* Not supported right now by the helper, but lets be thorough. */
> + if (was_visible && !fb)
> + intel_pre_disable_primary(crtc);
> + else if (was_visible && dev_priv->display.disable_fbc)
> dev_priv->display.disable_fbc(dev);
>
> + plane_state->visible = !!fb;
> dev_priv->display.update_primary_plane(crtc, fb, x, y);
> + if (!was_visible && fb)
> + intel_post_enable_primary(crtc);
>
> return 0;
> }
> @@ -3087,16 +3100,17 @@ static void intel_update_primary_planes(struct drm_device *dev)
> struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
>
> drm_modeset_lock(&crtc->mutex, NULL);
> - /*
> - * FIXME: Once we have proper support for primary planes (and
> - * disabling them without disabling the entire crtc) allow again
> - * a NULL crtc->primary->fb.
> - */
> - if (intel_crtc->active && crtc->primary->fb)
> +
> + if (intel_crtc->active) {
> + const struct intel_plane_state *state =
> + to_intel_plane_state(crtc->primary->state);
> +
> dev_priv->display.update_primary_plane(crtc,
> - crtc->primary->fb,
> - crtc->x,
> - crtc->y);
> + state->base.fb,
> + state->src.x1 >> 16,
> + state->src.y1 >> 16);
> + }
> +
> drm_modeset_unlock(&crtc->mutex);
> }
> }
> @@ -10659,6 +10673,7 @@ static struct drm_crtc_helper_funcs intel_helper_funcs = {
> .load_lut = intel_crtc_load_lut,
> .atomic_begin = intel_begin_crtc_commit,
> .atomic_flush = intel_finish_crtc_commit,
> + .atomic_check = intel_atomic_check_crtc,
> };
>
> /**
> @@ -10713,7 +10728,6 @@ static void intel_modeset_update_connector_atomic_state(struct drm_device *dev)
> */
> static void intel_modeset_fixup_state(struct drm_atomic_state *state)
> {
> - struct intel_crtc *crtc;
> struct intel_encoder *encoder;
> struct intel_connector *connector;
>
> @@ -10736,11 +10750,6 @@ static void intel_modeset_fixup_state(struct drm_atomic_state *state)
> encoder->base.crtc = NULL;
> }
>
> - for_each_intel_crtc(state->dev, crtc) {
> - crtc->base.enabled = crtc->base.state->enable;
> - crtc->config = to_intel_crtc_state(crtc->base.state);
> - }
> -
> /* Copy the new configuration to the staged state, to keep the few
> * pieces of code that haven't been converted yet happy */
> intel_modeset_update_staged_output_state(state->dev);
> @@ -11170,6 +11179,8 @@ intel_modeset_update_state(struct drm_atomic_state *state)
> struct drm_crtc *crtc;
> struct drm_crtc_state *crtc_state;
> struct drm_connector *connector;
> + struct drm_connector_state *connector_state;
> + int i;
>
> intel_shared_dpll_commit(dev_priv);
>
> @@ -11185,7 +11196,26 @@ intel_modeset_update_state(struct drm_atomic_state *state)
> intel_encoder->connectors_active = false;
> }
>
> - drm_atomic_helper_swap_state(state->dev, state);
> + /*
> + * swap crtc and connector state, plane state is already swapped in
> + * __intel_set_mode_update_planes. Once .crtc_disable is fixed
> + * all state should be swapped before disabling crtc's.
> + */

Can't we just fix .crtc_disable() first?

> + for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + crtc->enabled = crtc_state->enable;
> + to_intel_crtc(crtc)->config = to_intel_crtc_state(crtc_state);
> +
> + crtc->state->state = state;
> + swap(state->crtc_states[i], crtc->state);
> + crtc->state->state = NULL;
> + }
> +
> + for_each_connector_in_state(state, connector, connector_state, i) {
> + connector->state->state = state;
> + swap(state->connector_states[i], connector->state);
> + connector->state->state = NULL;
> + }
> +
> intel_modeset_fixup_state(state);
>
> /* Double check state. */
> @@ -11740,6 +11770,30 @@ static void update_scanline_offset(struct intel_crtc *crtc)
> crtc->scanline_offset = 1;
> }
>
> +static int intel_modeset_compute_planes(struct drm_atomic_state *state,
> + struct drm_crtc *crtc)
> +{
> + struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> + int pipe = intel_crtc->pipe;
> + struct drm_plane_state *plane_state;
> + struct drm_plane *plane;
> +
> + plane_state = drm_atomic_get_plane_state(state, crtc->cursor);
> + if (IS_ERR(plane_state))
> + return PTR_ERR(plane_state);
> +
> + /* Add all overlay planes */
> + drm_for_each_legacy_plane(plane, &crtc->dev->mode_config.plane_list) {
> + if (to_intel_plane(plane)->pipe == pipe) {
> + plane_state = drm_atomic_get_plane_state(state, plane);
> + if (IS_ERR(plane_state))
> + return PTR_ERR(plane_state);
> + }
> + }
> +
> + return 0;
> +}
> +
> static struct intel_crtc_state *
> intel_modeset_compute_config(struct drm_crtc *crtc,
> struct drm_atomic_state *state)
> @@ -11765,8 +11819,14 @@ intel_modeset_compute_config(struct drm_crtc *crtc,
> if (IS_ERR(pipe_config))
> return pipe_config;
>
> + if (needs_modeset(&pipe_config->base)) {
> + ret = intel_modeset_compute_planes(state, crtc);
> + if (ret)
> + return ERR_PTR(ret);
> + }
> +
> if (!pipe_config->base.enable)
> - return pipe_config;
> + goto done;
>
> ret = intel_modeset_pipe_config(crtc, state, pipe_config);
> if (ret)
> @@ -11784,8 +11844,8 @@ intel_modeset_compute_config(struct drm_crtc *crtc,
> * required changes and forcing a mode set.
> */
>
> - intel_dump_pipe_config(to_intel_crtc(crtc), pipe_config,"[modeset]");
> -
> + intel_dump_pipe_config(to_intel_crtc(crtc), pipe_config, "[modeset]");
> +done:
> ret = drm_atomic_helper_check_planes(state->dev, state);
> if (ret)
> return ERR_PTR(ret);
> @@ -11869,6 +11929,113 @@ static int __intel_set_mode_checks(struct drm_atomic_state *state)
> return 0;
> }
>
> +static void __intel_set_mode_update_planes(struct drm_device *dev,
> + struct drm_atomic_state *state)
> +{
> + int i;
> + struct drm_plane_state *old_plane_state;
> + struct drm_crtc_state *crtc_state;
> + struct drm_plane *plane;
> + struct drm_crtc *crtc;
> +
> + /*
> + * For now only swap plane state, should be replaced with a
> + * call to drm_atomic_helper_swap_state
> + */
> + for_each_plane_in_state(state, plane, old_plane_state, i) {
> + struct drm_plane *plane = state->planes[i];
> +
> + if (!plane)
> + continue;
> +
> + plane->state->state = state;
> + swap(state->plane_states[i], plane->state);
> + plane->state->state = NULL;
> + }
> +
> + for_each_crtc_in_state(state, crtc, crtc_state, i) {
> + const struct drm_crtc_helper_funcs *funcs;
> +
> + funcs = crtc->helper_private;
> +
> + if (!funcs || !funcs->atomic_begin)
> + continue;
> +
> + /* XXX: Hack because crtc state is not swapped */
> + crtc->state->mode_changed = crtc_state->mode_changed;
> + crtc->state->active_changed = crtc_state->active_changed;
> +
> + DRM_DEBUG_ATOMIC("Calling atomic_begin on crtc %i\n", i);
> + funcs->atomic_begin(crtc);
> + }
> +
> + for_each_plane_in_state(state, plane, old_plane_state, i) {
> + bool visible = to_intel_plane_state(plane->state)->visible;
> + struct intel_plane *intel_plane = to_intel_plane(plane);
> + const struct drm_plane_helper_funcs *funcs;
> +
> + crtc = plane->state->crtc;
> + funcs = plane->helper_private;
> +
> + if (!funcs)
> + continue;
> +
> + DRM_DEBUG_ATOMIC("Plane %i is visible: %i\n", i, visible);
> +
> + if (!visible)
> + funcs->atomic_update(plane, old_plane_state);

I'm getting a NULL pointer dereference in intel_commit_primary_plane()
because of a NULL crtc when an already disabled plane is disabled again.
Should we just skip the update here?

> + else if (crtc->state->mode_changed)
> + intel_plane->disable_plane(plane, crtc, true);
> + }
> +}
> +
> +static void __intel_set_mode_cleanup_planes(struct drm_device *dev,
> + struct drm_atomic_state *old_state)
> +{
> + int nplanes = dev->mode_config.num_total_plane;
> + int ncrtcs = dev->mode_config.num_crtc;
> + int i;
> +
> + for (i = 0; i < nplanes; i++) {
> + const struct drm_plane_helper_funcs *funcs;
> + struct drm_plane *plane = old_state->planes[i];
> + struct drm_plane_state *old_plane_state;
> +
> + if (!plane)
> + continue;
> +
> + funcs = plane->helper_private;
> +
> + if (!funcs)
> + continue;
> +
> + old_plane_state = old_state->plane_states[i];
> +
> + if (to_intel_plane_state(plane->state)->visible) {
> + DRM_DEBUG_ATOMIC("Plane %i is updated\n", i);
> + funcs->atomic_update(plane, old_plane_state);
> + } else
> + DRM_DEBUG_ATOMIC("Plane %i is left alone\n", i);
> + }
> +
> + for (i = 0; i < ncrtcs; i++) {
> + const struct drm_crtc_helper_funcs *funcs;
> + struct drm_crtc *crtc = old_state->crtcs[i];
> +
> + if (!crtc)
> + continue;
> +
> + funcs = crtc->helper_private;
> +
> + if (!funcs || !funcs->atomic_flush)
> + continue;
> +
> + DRM_DEBUG_ATOMIC("Calling atomic_flush on crtc %i\n", i);
> + funcs->atomic_flush(crtc);
> + }

These loops could use for_each_{crtc,plane}_in_state macros.

> + drm_atomic_helper_cleanup_planes(dev, old_state);
> +}
> +
> static int __intel_set_mode(struct drm_crtc *modeset_crtc,
> struct intel_crtc_state *pipe_config)
> {
> @@ -11877,7 +12044,7 @@ static int __intel_set_mode(struct drm_crtc *modeset_crtc,
> struct drm_atomic_state *state = pipe_config->base.state;
> struct drm_crtc *crtc;
> struct drm_crtc_state *crtc_state;
> - int ret = 0;
> + int ret;
> int i;
>
> ret = __intel_set_mode_checks(state);
> @@ -11888,14 +12055,14 @@ static int __intel_set_mode(struct drm_crtc *modeset_crtc,
> if (ret)
> return ret;
>
> + __intel_set_mode_update_planes(dev, state);
> +
> for_each_crtc_in_state(state, crtc, crtc_state, i) {
> if (!needs_modeset(crtc_state))
> continue;
>
> - intel_crtc_disable_planes(crtc);
> + intel_crtc_dpms_overlay_disable(to_intel_crtc(crtc));
> dev_priv->display.crtc_disable(crtc);
> - if (!crtc_state->enable)
> - drm_plane_helper_disable(crtc->primary);
> }
>
> /* crtc->mode is already used by the ->mode_set callbacks, hence we need
> @@ -11926,8 +12093,6 @@ static int __intel_set_mode(struct drm_crtc *modeset_crtc,
>
> modeset_update_crtc_power_domains(state);
>
> - drm_atomic_helper_commit_planes(dev, state);
> -
> /* Now enable the clocks, plane, pipe, and connectors that we set up. */
> for_each_crtc_in_state(state, crtc, crtc_state, i) {
> if (!crtc->state->enable)
> @@ -11935,13 +12100,13 @@ static int __intel_set_mode(struct drm_crtc *modeset_crtc,
>
> update_scanline_offset(to_intel_crtc(crtc));
>
> - dev_priv->display.crtc_enable(crtc);
> - intel_crtc_enable_planes(crtc);
> + if (needs_modeset(crtc->state))
> + dev_priv->display.crtc_enable(crtc);

In v2 of the patch that removes modeset_pipes and friends, I added a
check for needs_modeset() before update_scanline_offset().

> }
>
> - /* FIXME: add subpixel order */
> + __intel_set_mode_cleanup_planes(dev, state);
>
> - drm_atomic_helper_cleanup_planes(dev, state);
> + /* FIXME: add subpixel order */
>
> drm_atomic_state_free(state);
>
> @@ -12170,6 +12335,7 @@ intel_modeset_stage_output_state(struct drm_device *dev,
> return ret;
>
> crtc_state->enable = drm_atomic_connectors_for_crtc(state, crtc);
> + crtc_state->active = crtc_state->enable;

Should this be a separate fix?

> }
>
> ret = intel_modeset_setup_plane_state(state, set->crtc, set->mode,
> @@ -12190,20 +12356,11 @@ intel_modeset_stage_output_state(struct drm_device *dev,
> return 0;
> }
>
> -static bool primary_plane_visible(struct drm_crtc *crtc)
> -{
> - struct intel_plane_state *plane_state =
> - to_intel_plane_state(crtc->primary->state);
> -
> - return plane_state->visible;
> -}
> -
> static int intel_crtc_set_config(struct drm_mode_set *set)
> {
> struct drm_device *dev;
> struct drm_atomic_state *state = NULL;
> struct intel_crtc_state *pipe_config;
> - bool primary_plane_was_visible;
> int ret;
>
> BUG_ON(!set);
> @@ -12242,38 +12399,7 @@ static int intel_crtc_set_config(struct drm_mode_set *set)
>
> intel_update_pipe_size(to_intel_crtc(set->crtc));
>
> - primary_plane_was_visible = primary_plane_visible(set->crtc);
> -
> ret = intel_set_mode_with_config(set->crtc, pipe_config);
> -
> - if (ret == 0 &&
> - pipe_config->base.enable &&
> - pipe_config->base.planes_changed &&
> - !needs_modeset(&pipe_config->base)) {
> - struct intel_crtc *intel_crtc = to_intel_crtc(set->crtc);
> -
> - /*
> - * We need to make sure the primary plane is re-enabled if it
> - * has previously been turned off.
> - */
> - if (ret == 0 && !primary_plane_was_visible &&
> - primary_plane_visible(set->crtc)) {
> - WARN_ON(!intel_crtc->active);
> - intel_post_enable_primary(set->crtc);
> - }
> -
> - /*
> - * In the fastboot case this may be our only check of the
> - * state after boot. It would be better to only do it on
> - * the first update, but we don't have a nice way of doing that
> - * (and really, set_config isn't used much for high freq page
> - * flipping, so increasing its cost here shouldn't be a big
> - * deal).
> - */
> - if (i915.fastboot && ret == 0)
> - intel_modeset_check_state(set->crtc->dev);
> - }
> -

Maybe this could be a separate patch?

> if (ret) {
> DRM_DEBUG_KMS("failed to set mode on [CRTC:%d], err = %d\n",
> set->crtc->base.id, ret);
> @@ -12413,6 +12539,9 @@ bool intel_wm_need_update(struct drm_plane *plane,
> plane->state->rotation != state->rotation)
> return true;
>
> + if (plane->state->crtc_w != state->crtc_w)
> + return true;
> +
> return false;
> }
>
> @@ -12507,74 +12636,22 @@ intel_check_primary_plane(struct drm_plane *plane,
> struct intel_plane_state *state)
> {
> struct drm_device *dev = plane->dev;
> - struct drm_i915_private *dev_priv = dev->dev_private;
> struct drm_crtc *crtc = state->base.crtc;
> - struct intel_crtc *intel_crtc;
> struct drm_framebuffer *fb = state->base.fb;
> struct drm_rect *dest = &state->dst;
> struct drm_rect *src = &state->src;
> const struct drm_rect *clip = &state->clip;
> bool can_position = false;
> - int ret;
> -
> - crtc = crtc ? crtc : plane->crtc;
> - intel_crtc = to_intel_crtc(crtc);
>
> if (INTEL_INFO(dev)->gen >= 9)
> can_position = true;
>
> - ret = drm_plane_helper_check_update(plane, crtc, fb,
> - src, dest, clip,
> - DRM_PLANE_HELPER_NO_SCALING,
> - DRM_PLANE_HELPER_NO_SCALING,
> - can_position, true,
> - &state->visible);
> - if (ret)
> - return ret;
> -
> - if (intel_crtc->active) {
> - struct intel_plane_state *old_state =
> - to_intel_plane_state(plane->state);
> -
> - intel_crtc->atomic.wait_for_flips = true;
> -
> - /*
> - * FBC does not work on some platforms for rotated
> - * planes, so disable it when rotation is not 0 and
> - * update it when rotation is set back to 0.
> - *
> - * FIXME: This is redundant with the fbc update done in
> - * the primary plane enable function except that that
> - * one is done too late. We eventually need to unify
> - * this.
> - */
> - if (state->visible &&
> - INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev) &&
> - dev_priv->fbc.crtc == intel_crtc &&
> - state->base.rotation != BIT(DRM_ROTATE_0)) {
> - intel_crtc->atomic.disable_fbc = true;
> - }
> -
> - if (state->visible && !old_state->visible) {
> - /*
> - * BDW signals flip done immediately if the plane
> - * is disabled, even if the plane enable is already
> - * armed to occur at the next vblank :(
> - */
> - if (IS_BROADWELL(dev))
> - intel_crtc->atomic.wait_vblank = true;
> - }
> -
> - intel_crtc->atomic.fb_bits |=
> - INTEL_FRONTBUFFER_PRIMARY(intel_crtc->pipe);
> -
> - intel_crtc->atomic.update_fbc = true;
> -
> - if (intel_wm_need_update(plane, &state->base))
> - intel_crtc->atomic.update_wm = true;
> - }
> -
> - return 0;
> + return drm_plane_helper_check_update(plane, crtc, fb,
> + src, dest, clip,
> + DRM_PLANE_HELPER_NO_SCALING,
> + DRM_PLANE_HELPER_NO_SCALING,
> + can_position, true,
> + &state->visible);
> }
>
> static void
> @@ -12600,8 +12677,10 @@ intel_commit_primary_plane(struct drm_plane *plane,
> /* FIXME: kill this fastboot hack */
> intel_update_pipe_size(intel_crtc);
>
> - dev_priv->display.update_primary_plane(crtc, plane->fb,
> - crtc->x, crtc->y);
> + dev_priv->display.update_primary_plane(crtc,
> + state->base.fb,
> + state->src.x1 >> 16,
> + state->src.y1 >> 16);
> }
> }
>
> @@ -12616,6 +12695,123 @@ intel_disable_primary_plane(struct drm_plane *plane,
> dev_priv->display.update_primary_plane(crtc, NULL, 0, 0);
> }
>
> +/* Transitional checking here, mostly for plane updates */
> +static int intel_atomic_check_crtc(struct drm_crtc *crtc,
> + struct drm_crtc_state *crtc_state)
> +{
> + struct intel_crtc_state *pipe_config = to_intel_crtc_state(crtc_state);
> + struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
> + struct drm_atomic_state *state = crtc_state->state;
> + struct drm_device *dev = crtc->dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + unsigned plane_mask;
> + int i, nplanes = dev->mode_config.num_total_plane, idx;
> + bool mode_changed = needs_modeset(crtc_state);
> + bool is_crtc_enabled = crtc_state->active;
> + bool was_crtc_enabled = crtc->state->active && intel_crtc->active;
> +
> + memset(&intel_crtc->atomic, 0, sizeof(intel_crtc->atomic));
> + intel_crtc->atomic.update_wm = mode_changed;
> +
> + idx = drm_crtc_index(crtc);
> + DRM_DEBUG_ATOMIC("Crtc %i was enabled %i now enabled: %i\n",
> + idx, was_crtc_enabled, is_crtc_enabled);
> +
> + plane_mask = crtc_state->plane_mask | crtc->state->plane_mask;
> + for (i = 0; i < nplanes; i++) {
> + struct intel_plane_state *plane_state, *old_plane_state;
> + struct intel_plane *plane = to_intel_plane(state->planes[i]);
> + bool turn_off, turn_on, visible, was_visible;
> + struct drm_framebuffer *fb;
> +
> + if (!plane)
> + continue;
> +
> + plane_state = to_intel_plane_state(state->plane_states[i]);
> + old_plane_state = to_intel_plane_state(plane->base.state);
> +
> + was_visible = old_plane_state->visible && was_crtc_enabled;
> + visible = plane_state->visible && is_crtc_enabled;
> +
> + turn_off = was_visible && (!visible || mode_changed);
> + turn_on = visible && (!was_visible || mode_changed);
> + fb = plane_state->base.fb;
> +
> + DRM_DEBUG_ATOMIC("Crtc %i has plane %i with fb %i\n", idx,
> + drm_plane_index(&plane->base), fb ? fb->base.id : -1);
> + DRM_DEBUG_ATOMIC("\tvisible %i -> %i, off %i, on %i, ms %i\n",
> + was_visible, visible, turn_off, turn_on, mode_changed);
> +
> + /* plane being turned off as part of modeset or changes? */
> + if (intel_wm_need_update(&plane->base, &plane_state->base))
> + intel_crtc->atomic.update_wm = true;
> +
> + /*
> + * 'prepare' is never called when plane is being disabled, so
> + * we need to handle frontbuffer tracking as a special case
> + */
> + if (old_plane_state->base.fb && !plane_state->base.fb)
> + intel_crtc->atomic.disabled_planes |=
> + (1 << drm_plane_index(&plane->base));
> +
> + switch (plane->base.type) {
> + case DRM_PLANE_TYPE_PRIMARY:
> + intel_crtc->atomic.fb_bits |=
> + INTEL_FRONTBUFFER_PRIMARY(intel_crtc->pipe);
> +
> + intel_crtc->atomic.wait_for_flips = true;
> + intel_crtc->atomic.pre_disable_primary = turn_off;
> + intel_crtc->atomic.post_enable_primary = turn_on;
> +
> + if (turn_off)
> + intel_crtc->atomic.disable_fbc = true;
> +
> + /*
> + * FBC does not work on some platforms for rotated
> + * planes, so disable it when rotation is not 0 and
> + * update it when rotation is set back to 0.
> + *
> + * FIXME: This is redundant with the fbc update done in
> + * the primary plane enable function except that that
> + * one is done too late. We eventually need to unify
> + * this.
> + */
> +
> + if (visible &&
> + INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev) &&
> + dev_priv->fbc.crtc == intel_crtc &&
> + plane_state->base.rotation != BIT(DRM_ROTATE_0))
> + intel_crtc->atomic.disable_fbc = true;
> +
> + /*
> + * BDW signals flip done immediately if the plane
> + * is disabled, even if the plane enable is already
> + * armed to occur at the next vblank :(
> + */
> + if (turn_on && IS_BROADWELL(dev))
> + intel_crtc->atomic.wait_vblank = true;
> +
> + intel_crtc->atomic.update_fbc = true;
> + break;
> + case DRM_PLANE_TYPE_CURSOR:
> + intel_crtc->atomic.fb_bits |=
> + INTEL_FRONTBUFFER_CURSOR(intel_crtc->pipe);
> + break;
> + case DRM_PLANE_TYPE_OVERLAY:
> + intel_crtc->atomic.fb_bits |=
> + INTEL_FRONTBUFFER_SPRITE(intel_crtc->pipe);
> +
> + if (turn_off) {
> + intel_crtc->atomic.wait_vblank = true;
> + intel_crtc->atomic.update_sprite_watermarks |=
> + (1 << drm_plane_index(&plane->base));
> + }
> + break;
> + }
> + }
> + return 0;
> +}
> +

Is there a specific reason why this needs to be in check_crtc vs
check_plane? IMO, it would make review easier if this move was a
separate patch.

> static void intel_begin_crtc_commit(struct drm_crtc *crtc)
> {
> struct drm_device *dev = crtc->dev;
> @@ -12664,10 +12860,13 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc)
> intel_runtime_pm_get(dev_priv);
>
> /* Perform vblank evasion around commit operation */
> - if (intel_crtc->active)
> + if (intel_crtc->active && !needs_modeset(crtc->state) &&
> + !dev_priv->power_domains.init_power_on)
> intel_crtc->atomic.evade =
> intel_pipe_update_start(intel_crtc,
> &intel_crtc->atomic.start_vbl_count);
> + else
> + intel_crtc->atomic.evade = false;
> }
>
> static void intel_finish_crtc_commit(struct drm_crtc *crtc)
> @@ -12703,6 +12902,8 @@ static void intel_finish_crtc_commit(struct drm_crtc *crtc)
> false, false);
>
> memset(&intel_crtc->atomic, 0, sizeof(intel_crtc->atomic));
> + crtc->state->mode_changed = false;
> + crtc->state->active_changed = false;
> }
>
> /**
> @@ -12812,13 +13013,9 @@ intel_check_cursor_plane(struct drm_plane *plane,
> struct drm_rect *src = &state->src;
> const struct drm_rect *clip = &state->clip;
> struct drm_i915_gem_object *obj = intel_fb_obj(fb);
> - struct intel_crtc *intel_crtc;
> unsigned stride;
> int ret;
>
> - crtc = crtc ? crtc : plane->crtc;
> - intel_crtc = to_intel_crtc(crtc);
> -
> ret = drm_plane_helper_check_update(plane, crtc, fb,
> src, dest, clip,
> DRM_PLANE_HELPER_NO_SCALING,
> @@ -12830,7 +13027,7 @@ intel_check_cursor_plane(struct drm_plane *plane,
>
> /* if we want to turn off the cursor ignore width and height */
> if (!obj)
> - goto finish;
> + return 0;
>
> /* Check for which cursor types we support */
> if (!cursor_size_ok(dev, state->base.crtc_w, state->base.crtc_h)) {
> @@ -12847,19 +13044,10 @@ intel_check_cursor_plane(struct drm_plane *plane,
>
> if (fb->modifier[0] != DRM_FORMAT_MOD_NONE) {
> DRM_DEBUG_KMS("cursor cannot be tiled\n");
> - ret = -EINVAL;
> - }
> -
> -finish:
> - if (intel_crtc->active) {
> - if (plane->state->crtc_w != state->base.crtc_w)
> - intel_crtc->atomic.update_wm = true;
> -
> - intel_crtc->atomic.fb_bits |=
> - INTEL_FRONTBUFFER_CURSOR(intel_crtc->pipe);
> + return -EINVAL;
> }
>
> - return ret;
> + return 0;
> }
>
> static void
> @@ -14089,6 +14277,7 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc)
>
> WARN_ON(crtc->active);
> crtc->base.state->enable = false;
> + crtc->base.state->active = false;
> crtc->base.enabled = false;
> }
>
> @@ -14117,6 +14306,7 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc)
> crtc->active ? "enabled" : "disabled");
>
> crtc->base.state->enable = crtc->active;
> + crtc->base.state->active = crtc->active;
> crtc->base.enabled = crtc->active;
>
> /* Because we only establish the connector -> encoder ->
> @@ -14255,6 +14445,7 @@ static void intel_modeset_readout_hw_state(struct drm_device *dev)
> crtc->config);
>
> crtc->base.state->enable = crtc->active;
> + crtc->base.state->active = crtc->active;
> crtc->base.enabled = crtc->active;
>

Should this be a separate bug fix?

Ander

> plane_state = to_intel_plane_state(primary->state);
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index 7419e04b113f..5a277757ac2d 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -811,12 +811,8 @@ intel_check_sprite_plane(struct drm_plane *plane,
> int max_scale, min_scale;
> int pixel_size;
>
> - intel_crtc = intel_crtc ? intel_crtc : to_intel_crtc(plane->crtc);
> -
> - if (!fb) {
> - state->visible = false;
> - goto finish;
> - }
> + if (!fb)
> + return 0;
>
> /* Don't modify another pipe's plane */
> if (intel_plane->pipe != intel_crtc->pipe) {
> @@ -847,7 +843,7 @@ intel_check_sprite_plane(struct drm_plane *plane,
> vscale = drm_rect_calc_vscale_relaxed(src, dst, min_scale, max_scale);
> BUG_ON(vscale < 0);
>
> - state->visible = drm_rect_clip_scaled(src, dst, clip, hscale, vscale);
> + state->visible = drm_rect_clip_scaled(src, dst, clip, hscale, vscale);
>
> crtc_x = dst->x1;
> crtc_y = dst->y1;
> @@ -952,29 +948,6 @@ intel_check_sprite_plane(struct drm_plane *plane,
> dst->y1 = crtc_y;
> dst->y2 = crtc_y + crtc_h;
>
> -finish:
> - /*
> - * If the sprite is completely covering the primary plane,
> - * we can disable the primary and save power.
> - */
> - if (intel_crtc->active) {
> - intel_crtc->atomic.fb_bits |=
> - INTEL_FRONTBUFFER_SPRITE(intel_crtc->pipe);
> -
> - if (intel_wm_need_update(plane, &state->base))
> - intel_crtc->atomic.update_wm = true;
> -
> - if (!state->visible) {
> - /*
> - * Avoid underruns when disabling the sprite.
> - * FIXME remove once watermark updates are done properly.
> - */
> - intel_crtc->atomic.wait_vblank = true;
> - intel_crtc->atomic.update_sprite_watermarks |=
> - (1 << drm_plane_index(plane));
> - }
> - }
> -
> return 0;
> }
>