diff options
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun4i_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_crtc.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_crtc.c b/drivers/gpu/drm/sun4i/sun4i_crtc.c new file mode 100644 index 000000000..41cacecbe --- /dev/null +++ b/drivers/gpu/drm/sun4i/sun4i_crtc.c @@ -0,0 +1,128 @@ +/* + * 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/drmP.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_modes.h> + +#include <linux/clk-provider.h> +#include <linux/ioport.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <linux/regmap.h> + +#include <video/videomode.h> + +#include "sun4i_backend.h" +#include "sun4i_crtc.h" +#include "sun4i_drv.h" +#include "sun4i_tcon.h" + +static void sun4i_crtc_atomic_begin(struct drm_crtc *crtc, + struct drm_crtc_state *old_state) +{ + struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc); + struct drm_device *dev = crtc->dev; + unsigned long flags; + + if (crtc->state->event) { + WARN_ON(drm_crtc_vblank_get(crtc) != 0); + + spin_lock_irqsave(&dev->event_lock, flags); + scrtc->event = crtc->state->event; + spin_unlock_irqrestore(&dev->event_lock, flags); + crtc->state->event = NULL; + } +} + +static void sun4i_crtc_atomic_flush(struct drm_crtc *crtc, + struct drm_crtc_state *old_state) +{ + struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc); + struct sun4i_drv *drv = scrtc->drv; + + DRM_DEBUG_DRIVER("Committing plane changes\n"); + + sun4i_backend_commit(drv->backend); +} + +static void sun4i_crtc_disable(struct drm_crtc *crtc) +{ + struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc); + struct sun4i_drv *drv = scrtc->drv; + + DRM_DEBUG_DRIVER("Disabling the CRTC\n"); + + sun4i_tcon_disable(drv->tcon); + + if (crtc->state->event && !crtc->state->active) { + spin_lock_irq(&crtc->dev->event_lock); + drm_crtc_send_vblank_event(crtc, crtc->state->event); + spin_unlock_irq(&crtc->dev->event_lock); + + crtc->state->event = NULL; + } +} + +static void sun4i_crtc_enable(struct drm_crtc *crtc) +{ + struct sun4i_crtc *scrtc = drm_crtc_to_sun4i_crtc(crtc); + struct sun4i_drv *drv = scrtc->drv; + + DRM_DEBUG_DRIVER("Enabling the CRTC\n"); + + sun4i_tcon_enable(drv->tcon); +} + +static const struct drm_crtc_helper_funcs sun4i_crtc_helper_funcs = { + .atomic_begin = sun4i_crtc_atomic_begin, + .atomic_flush = sun4i_crtc_atomic_flush, + .disable = sun4i_crtc_disable, + .enable = sun4i_crtc_enable, +}; + +static const struct drm_crtc_funcs sun4i_crtc_funcs = { + .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, + .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, + .destroy = drm_crtc_cleanup, + .page_flip = drm_atomic_helper_page_flip, + .reset = drm_atomic_helper_crtc_reset, + .set_config = drm_atomic_helper_set_config, +}; + +struct sun4i_crtc *sun4i_crtc_init(struct drm_device *drm) +{ + struct sun4i_drv *drv = drm->dev_private; + struct sun4i_crtc *scrtc; + int ret; + + scrtc = devm_kzalloc(drm->dev, sizeof(*scrtc), GFP_KERNEL); + if (!scrtc) + return NULL; + scrtc->drv = drv; + + ret = drm_crtc_init_with_planes(drm, &scrtc->crtc, + drv->primary, + NULL, + &sun4i_crtc_funcs, + NULL); + if (ret) { + dev_err(drm->dev, "Couldn't init DRM CRTC\n"); + return NULL; + } + + drm_crtc_helper_add(&scrtc->crtc, &sun4i_crtc_helper_funcs); + + return scrtc; +} |