forked from Minki/linux
7921e1477a
As we are going to add support for the Allwinner DE2 Mixer in sun4i-drm driver, we will finally have two types of layers. Each layer is bound to a drm_plane that is CRTC-specific, so we create them when initializing CRTC (calling sun4i_layers_init, which will be generalized in next patch). The drm_plane's will be used when creating CRTC, but the CRTC initialization code do not care other properties of the layer, so we let the sun4i_layers_init function return drm_plane's only. As we have no need to trace the layers after the CRTC is properly created, we drop the layers pointer in sun4i_crtc struct. Doing this uncouples the CRTC code from the type of layer (the sun4i_layers_init function name is still hardcoded and will be changed in the next patch), so that we can finally gain support for the mixer in DE2, which has different layers. Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
202 lines
5.1 KiB
C
202 lines
5.1 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/drmP.h>
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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_crtc_helper.h>
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#include <drm/drm_modes.h>
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#include <linux/clk-provider.h>
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#include <linux/ioport.h>
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#include <linux/of_address.h>
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#include <linux/of_graph.h>
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#include <linux/of_irq.h>
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#include <linux/regmap.h>
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#include <video/videomode.h>
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#include "sun4i_backend.h"
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#include "sun4i_crtc.h"
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#include "sun4i_drv.h"
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#include "sun4i_layer.h"
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#include "sun4i_tcon.h"
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static void sun4i_crtc_atomic_begin(struct drm_crtc *crtc,
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struct drm_crtc_state *old_state)
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{
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struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
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struct drm_device *dev = crtc->dev;
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unsigned long flags;
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if (crtc->state->event) {
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WARN_ON(drm_crtc_vblank_get(crtc) != 0);
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spin_lock_irqsave(&dev->event_lock, flags);
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scrtc->event = crtc->state->event;
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spin_unlock_irqrestore(&dev->event_lock, flags);
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crtc->state->event = NULL;
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}
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}
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static void sun4i_crtc_atomic_flush(struct drm_crtc *crtc,
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struct drm_crtc_state *old_state)
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{
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struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
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struct drm_pending_vblank_event *event = crtc->state->event;
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DRM_DEBUG_DRIVER("Committing plane changes\n");
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sun4i_backend_commit(scrtc->backend);
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if (event) {
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crtc->state->event = NULL;
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spin_lock_irq(&crtc->dev->event_lock);
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if (drm_crtc_vblank_get(crtc) == 0)
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drm_crtc_arm_vblank_event(crtc, event);
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else
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drm_crtc_send_vblank_event(crtc, event);
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spin_unlock_irq(&crtc->dev->event_lock);
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}
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}
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static void sun4i_crtc_disable(struct drm_crtc *crtc)
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{
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struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
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DRM_DEBUG_DRIVER("Disabling the CRTC\n");
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sun4i_tcon_disable(scrtc->tcon);
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if (crtc->state->event && !crtc->state->active) {
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spin_lock_irq(&crtc->dev->event_lock);
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drm_crtc_send_vblank_event(crtc, crtc->state->event);
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spin_unlock_irq(&crtc->dev->event_lock);
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crtc->state->event = NULL;
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}
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}
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static void sun4i_crtc_enable(struct drm_crtc *crtc)
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{
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struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
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DRM_DEBUG_DRIVER("Enabling the CRTC\n");
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sun4i_tcon_enable(scrtc->tcon);
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}
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static const struct drm_crtc_helper_funcs sun4i_crtc_helper_funcs = {
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.atomic_begin = sun4i_crtc_atomic_begin,
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.atomic_flush = sun4i_crtc_atomic_flush,
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.disable = sun4i_crtc_disable,
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.enable = sun4i_crtc_enable,
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};
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static int sun4i_crtc_enable_vblank(struct drm_crtc *crtc)
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{
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struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
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DRM_DEBUG_DRIVER("Enabling VBLANK on crtc %p\n", crtc);
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sun4i_tcon_enable_vblank(scrtc->tcon, true);
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return 0;
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}
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static void sun4i_crtc_disable_vblank(struct drm_crtc *crtc)
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{
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struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc);
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DRM_DEBUG_DRIVER("Disabling VBLANK on crtc %p\n", crtc);
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sun4i_tcon_enable_vblank(scrtc->tcon, false);
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}
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static const struct drm_crtc_funcs sun4i_crtc_funcs = {
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.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
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.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
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.destroy = drm_crtc_cleanup,
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.page_flip = drm_atomic_helper_page_flip,
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.reset = drm_atomic_helper_crtc_reset,
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.set_config = drm_atomic_helper_set_config,
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.enable_vblank = sun4i_crtc_enable_vblank,
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.disable_vblank = sun4i_crtc_disable_vblank,
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};
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struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm,
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struct sun4i_backend *backend,
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struct sun4i_tcon *tcon)
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{
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struct sun4i_crtc *scrtc;
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struct drm_plane **planes;
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struct drm_plane *primary = NULL, *cursor = NULL;
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int ret, i;
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scrtc = devm_kzalloc(drm->dev, sizeof(*scrtc), GFP_KERNEL);
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if (!scrtc)
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return ERR_PTR(-ENOMEM);
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scrtc->backend = backend;
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scrtc->tcon = tcon;
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/* Create our layers */
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planes = sun4i_layers_init(drm, scrtc);
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if (IS_ERR(planes)) {
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dev_err(drm->dev, "Couldn't create the planes\n");
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return NULL;
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}
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/* find primary and cursor planes for drm_crtc_init_with_planes */
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for (i = 0; planes[i]; i++) {
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struct drm_plane *plane = planes[i];
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switch (plane->type) {
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case DRM_PLANE_TYPE_PRIMARY:
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primary = plane;
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break;
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case DRM_PLANE_TYPE_CURSOR:
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cursor = plane;
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break;
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default:
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break;
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}
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}
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ret = drm_crtc_init_with_planes(drm, &scrtc->crtc,
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primary,
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cursor,
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&sun4i_crtc_funcs,
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NULL);
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if (ret) {
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dev_err(drm->dev, "Couldn't init DRM CRTC\n");
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return ERR_PTR(ret);
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}
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drm_crtc_helper_add(&scrtc->crtc, &sun4i_crtc_helper_funcs);
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/* Set crtc.port to output port node of the tcon */
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scrtc->crtc.port = of_graph_get_port_by_id(scrtc->tcon->dev->of_node,
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1);
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/* Set possible_crtcs to this crtc for overlay planes */
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for (i = 0; planes[i]; i++) {
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uint32_t possible_crtcs = BIT(drm_crtc_index(&scrtc->crtc));
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struct drm_plane *plane = planes[i];
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if (plane->type == DRM_PLANE_TYPE_OVERLAY)
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plane->possible_crtcs = possible_crtcs;
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}
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return scrtc;
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}
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