diff options
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun4i_layer.c')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_layer.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_layer.c b/drivers/gpu/drm/sun4i/sun4i_layer.c new file mode 100644 index 000000000..750ad24de --- /dev/null +++ b/drivers/gpu/drm/sun4i/sun4i_layer.c @@ -0,0 +1,207 @@ +/* + * Copyright (C) 2015 Free Electrons + * Copyright (C) 2015 NextThing Co + * + * Maxime Ripard <maxime.ripard@free-electrons.com> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + */ + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_plane_helper.h> +#include <drm/drmP.h> + +#include "sun4i_backend.h" +#include "sun4i_frontend.h" +#include "sun4i_layer.h" +#include "sunxi_engine.h" + +static void sun4i_backend_layer_reset(struct drm_plane *plane) +{ + struct sun4i_layer *layer = plane_to_sun4i_layer(plane); + struct sun4i_layer_state *state; + + if (plane->state) { + state = state_to_sun4i_layer_state(plane->state); + + __drm_atomic_helper_plane_destroy_state(&state->state); + + kfree(state); + plane->state = NULL; + } + + state = kzalloc(sizeof(*state), GFP_KERNEL); + if (state) { + plane->state = &state->state; + plane->state->plane = plane; + plane->state->alpha = DRM_BLEND_ALPHA_OPAQUE; + plane->state->zpos = layer->id; + } +} + +static struct drm_plane_state * +sun4i_backend_layer_duplicate_state(struct drm_plane *plane) +{ + struct sun4i_layer_state *orig = state_to_sun4i_layer_state(plane->state); + struct sun4i_layer_state *copy; + + copy = kzalloc(sizeof(*copy), GFP_KERNEL); + if (!copy) + return NULL; + + __drm_atomic_helper_plane_duplicate_state(plane, ©->state); + copy->uses_frontend = orig->uses_frontend; + + return ©->state; +} + +static void sun4i_backend_layer_destroy_state(struct drm_plane *plane, + struct drm_plane_state *state) +{ + struct sun4i_layer_state *s_state = state_to_sun4i_layer_state(state); + + __drm_atomic_helper_plane_destroy_state(state); + + kfree(s_state); +} + +static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(old_state); + struct sun4i_layer *layer = plane_to_sun4i_layer(plane); + struct sun4i_backend *backend = layer->backend; + + sun4i_backend_layer_enable(backend, layer->id, false); + + if (layer_state->uses_frontend) { + unsigned long flags; + + spin_lock_irqsave(&backend->frontend_lock, flags); + backend->frontend_teardown = true; + spin_unlock_irqrestore(&backend->frontend_lock, flags); + } +} + +static void sun4i_backend_layer_atomic_update(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct sun4i_layer_state *layer_state = state_to_sun4i_layer_state(plane->state); + struct sun4i_layer *layer = plane_to_sun4i_layer(plane); + struct sun4i_backend *backend = layer->backend; + struct sun4i_frontend *frontend = backend->frontend; + + if (layer_state->uses_frontend) { + sun4i_frontend_init(frontend); + sun4i_frontend_update_coord(frontend, plane); + sun4i_frontend_update_buffer(frontend, plane); + sun4i_frontend_update_formats(frontend, plane, + DRM_FORMAT_ARGB8888); + sun4i_backend_update_layer_frontend(backend, layer->id, + DRM_FORMAT_ARGB8888); + sun4i_frontend_enable(frontend); + } else { + sun4i_backend_update_layer_formats(backend, layer->id, plane); + sun4i_backend_update_layer_buffer(backend, layer->id, plane); + } + + sun4i_backend_update_layer_coord(backend, layer->id, plane); + sun4i_backend_update_layer_zpos(backend, layer->id, plane); + sun4i_backend_layer_enable(backend, layer->id, true); +} + +static const struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = { + .atomic_disable = sun4i_backend_layer_atomic_disable, + .atomic_update = sun4i_backend_layer_atomic_update, +}; + +static const struct drm_plane_funcs sun4i_backend_layer_funcs = { + .atomic_destroy_state = sun4i_backend_layer_destroy_state, + .atomic_duplicate_state = sun4i_backend_layer_duplicate_state, + .destroy = drm_plane_cleanup, + .disable_plane = drm_atomic_helper_disable_plane, + .reset = sun4i_backend_layer_reset, + .update_plane = drm_atomic_helper_update_plane, +}; + +static const uint32_t sun4i_backend_layer_formats[] = { + DRM_FORMAT_ARGB8888, + DRM_FORMAT_ARGB4444, + DRM_FORMAT_ARGB1555, + DRM_FORMAT_RGBA5551, + DRM_FORMAT_RGBA4444, + DRM_FORMAT_RGB888, + DRM_FORMAT_RGB565, + DRM_FORMAT_UYVY, + DRM_FORMAT_VYUY, + DRM_FORMAT_XRGB8888, + DRM_FORMAT_YUYV, + DRM_FORMAT_YVYU, +}; + +static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm, + struct sun4i_backend *backend, + enum drm_plane_type type) +{ + struct sun4i_layer *layer; + int ret; + + layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL); + if (!layer) + return ERR_PTR(-ENOMEM); + + /* possible crtcs are set later */ + ret = drm_universal_plane_init(drm, &layer->plane, 0, + &sun4i_backend_layer_funcs, + sun4i_backend_layer_formats, + ARRAY_SIZE(sun4i_backend_layer_formats), + NULL, type, NULL); + if (ret) { + dev_err(drm->dev, "Couldn't initialize layer\n"); + return ERR_PTR(ret); + } + + drm_plane_helper_add(&layer->plane, + &sun4i_backend_layer_helper_funcs); + layer->backend = backend; + + drm_plane_create_alpha_property(&layer->plane); + drm_plane_create_zpos_property(&layer->plane, 0, 0, + SUN4I_BACKEND_NUM_LAYERS - 1); + + return layer; +} + +struct drm_plane **sun4i_layers_init(struct drm_device *drm, + struct sunxi_engine *engine) +{ + struct drm_plane **planes; + struct sun4i_backend *backend = engine_to_sun4i_backend(engine); + int i; + + /* We need to have a sentinel at the need, hence the overallocation */ + planes = devm_kcalloc(drm->dev, SUN4I_BACKEND_NUM_LAYERS + 1, + sizeof(*planes), GFP_KERNEL); + if (!planes) + return ERR_PTR(-ENOMEM); + + for (i = 0; i < SUN4I_BACKEND_NUM_LAYERS; i++) { + enum drm_plane_type type = i ? DRM_PLANE_TYPE_OVERLAY : DRM_PLANE_TYPE_PRIMARY; + struct sun4i_layer *layer; + + layer = sun4i_layer_init_one(drm, backend, type); + if (IS_ERR(layer)) { + dev_err(drm->dev, "Couldn't initialize %s plane\n", + i ? "overlay" : "primary"); + return ERR_CAST(layer); + }; + + layer->id = i; + planes[i] = &layer->plane; + }; + + return planes; +} |