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47d7fbb32c
The planes can do more than what was previously exposed. Add support for them. Since we still have the issue that the primary plane cannot have any alpha component, we will expose only the non-alpha formats in the primary formats, and the alpha formats will be exposed in the overlays. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Chen-Yu Tsai <wens@csie.org>
189 lines
5.5 KiB
C
189 lines
5.5 KiB
C
/*
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* Copyright (C) 2015 Free Electrons
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* Copyright (C) 2015 NextThing Co
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*
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* Maxime Ripard <maxime.ripard@free-electrons.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*/
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_plane_helper.h>
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#include <drm/drmP.h>
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#include "sun4i_backend.h"
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#include "sun4i_drv.h"
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#include "sun4i_layer.h"
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struct sun4i_plane_desc {
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enum drm_plane_type type;
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u8 pipe;
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const uint32_t *formats;
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uint32_t nformats;
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};
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static int sun4i_backend_layer_atomic_check(struct drm_plane *plane,
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struct drm_plane_state *state)
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{
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return 0;
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}
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static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane,
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struct drm_plane_state *old_state)
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{
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struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
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struct sun4i_drv *drv = layer->drv;
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struct sun4i_backend *backend = drv->backend;
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sun4i_backend_layer_enable(backend, layer->id, false);
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}
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static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
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struct drm_plane_state *old_state)
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{
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struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
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struct sun4i_drv *drv = layer->drv;
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struct sun4i_backend *backend = drv->backend;
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sun4i_backend_update_layer_coord(backend, layer->id, plane);
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sun4i_backend_update_layer_formats(backend, layer->id, plane);
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sun4i_backend_update_layer_buffer(backend, layer->id, plane);
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sun4i_backend_layer_enable(backend, layer->id, true);
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}
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static struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = {
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.atomic_check = sun4i_backend_layer_atomic_check,
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.atomic_disable = sun4i_backend_layer_atomic_disable,
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.atomic_update = sun4i_backend_layer_atomic_update,
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};
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static const struct drm_plane_funcs sun4i_backend_layer_funcs = {
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.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
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.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
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.destroy = drm_plane_cleanup,
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.disable_plane = drm_atomic_helper_disable_plane,
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.reset = drm_atomic_helper_plane_reset,
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.update_plane = drm_atomic_helper_update_plane,
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};
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static const uint32_t sun4i_backend_layer_formats_primary[] = {
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DRM_FORMAT_ARGB8888,
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DRM_FORMAT_RGB888,
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DRM_FORMAT_RGB565,
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DRM_FORMAT_XRGB8888,
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};
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static const uint32_t sun4i_backend_layer_formats_overlay[] = {
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DRM_FORMAT_ARGB8888,
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DRM_FORMAT_ARGB4444,
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DRM_FORMAT_ARGB1555,
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DRM_FORMAT_RGBA5551,
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DRM_FORMAT_RGBA4444,
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DRM_FORMAT_RGB888,
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DRM_FORMAT_RGB565,
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DRM_FORMAT_XRGB8888,
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};
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static const struct sun4i_plane_desc sun4i_backend_planes[] = {
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{
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.type = DRM_PLANE_TYPE_PRIMARY,
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.pipe = 0,
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.formats = sun4i_backend_layer_formats_primary,
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.nformats = ARRAY_SIZE(sun4i_backend_layer_formats_primary),
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},
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{
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.type = DRM_PLANE_TYPE_OVERLAY,
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.pipe = 1,
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.formats = sun4i_backend_layer_formats_overlay,
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.nformats = ARRAY_SIZE(sun4i_backend_layer_formats_overlay),
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},
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};
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static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
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const struct sun4i_plane_desc *plane)
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{
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struct sun4i_drv *drv = drm->dev_private;
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struct sun4i_layer *layer;
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int ret;
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layer = devm_kzalloc(drm->dev, sizeof(*layer), GFP_KERNEL);
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if (!layer)
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return ERR_PTR(-ENOMEM);
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ret = drm_universal_plane_init(drm, &layer->plane, BIT(0),
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&sun4i_backend_layer_funcs,
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plane->formats, plane->nformats,
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plane->type, NULL);
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if (ret) {
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dev_err(drm->dev, "Couldn't initialize layer\n");
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return ERR_PTR(ret);
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}
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drm_plane_helper_add(&layer->plane,
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&sun4i_backend_layer_helper_funcs);
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layer->drv = drv;
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if (plane->type == DRM_PLANE_TYPE_PRIMARY)
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drv->primary = &layer->plane;
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return layer;
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}
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struct sun4i_layer **sun4i_layers_init(struct drm_device *drm)
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{
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struct sun4i_drv *drv = drm->dev_private;
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struct sun4i_layer **layers;
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int i;
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layers = devm_kcalloc(drm->dev, ARRAY_SIZE(sun4i_backend_planes),
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sizeof(**layers), GFP_KERNEL);
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if (!layers)
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return ERR_PTR(-ENOMEM);
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/*
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* The hardware is a bit unusual here.
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*
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* Even though it supports 4 layers, it does the composition
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* in two separate steps.
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*
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* The first one is assigning a layer to one of its two
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* pipes. If more that 1 layer is assigned to the same pipe,
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* and if pixels overlaps, the pipe will take the pixel from
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* the layer with the highest priority.
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*
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* The second step is the actual alpha blending, that takes
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* the two pipes as input, and uses the eventual alpha
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* component to do the transparency between the two.
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*
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* This two steps scenario makes us unable to guarantee a
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* robust alpha blending between the 4 layers in all
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* situations. So we just expose two layers, one per pipe. On
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* SoCs that support it, sprites could fill the need for more
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* layers.
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*/
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for (i = 0; i < ARRAY_SIZE(sun4i_backend_planes); i++) {
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const struct sun4i_plane_desc *plane = &sun4i_backend_planes[i];
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struct sun4i_layer *layer = layers[i];
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layer = sun4i_layer_init_one(drm, plane);
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if (IS_ERR(layer)) {
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dev_err(drm->dev, "Couldn't initialize %s plane\n",
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i ? "overlay" : "primary");
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return ERR_CAST(layer);
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};
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DRM_DEBUG_DRIVER("Assigning %s plane to pipe %d\n",
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i ? "overlay" : "primary", plane->pipe);
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regmap_update_bits(drv->backend->regs, SUN4I_BACKEND_ATTCTL_REG0(i),
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SUN4I_BACKEND_ATTCTL_REG0_LAY_PIPESEL_MASK,
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SUN4I_BACKEND_ATTCTL_REG0_LAY_PIPESEL(plane->pipe));
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layer->id = i;
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};
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return layers;
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}
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