diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_crtc.c | 344 |
1 files changed, 344 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c new file mode 100644 index 0000000..683ceb0 --- /dev/null +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c @@ -0,0 +1,344 @@ +/* exynos_drm_crtc.c + * + * Copyright (c) 2011 Samsung Electronics Co., Ltd. + * Authors: + * Inki Dae <inki.dae@samsung.com> + * Joonyoung Shim <jy0922.shim@samsung.com> + * Seung-Woo Kim <sw0312.kim@samsung.com> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +#include "drmP.h" +#include "drm_crtc_helper.h" + +#include "exynos_drm_drv.h" +#include "exynos_drm_fb.h" +#include "exynos_drm_encoder.h" + +#define to_exynos_crtc(x) container_of(x, struct exynos_drm_crtc,\ + drm_crtc) + +/* + * @fb_x: horizontal position from framebuffer base + * @fb_y: vertical position from framebuffer base + * @base_x: horizontal position from screen base + * @base_y: vertical position from screen base + * @crtc_w: width of crtc + * @crtc_h: height of crtc + */ +struct exynos_drm_crtc_pos { + unsigned int fb_x; + unsigned int fb_y; + unsigned int base_x; + unsigned int base_y; + unsigned int crtc_w; + unsigned int crtc_h; +}; + +/* + * Exynos specific crtc structure. + * + * @drm_crtc: crtc object. + * @overlay: contain information common to display controller and hdmi and + * contents of this overlay object would be copied to sub driver size. + * @pipe: a crtc index created at load() with a new crtc object creation + * and the crtc object would be set to private->crtc array + * to get a crtc object corresponding to this pipe from private->crtc + * array when irq interrupt occured. the reason of using this pipe is that + * drm framework doesn't support multiple irq yet. + * we can refer to the crtc to current hardware interrupt occured through + * this pipe value. + */ +struct exynos_drm_crtc { + struct drm_crtc drm_crtc; + struct exynos_drm_overlay overlay; + unsigned int pipe; +}; + +void exynos_drm_crtc_apply(struct drm_crtc *crtc) +{ + struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); + struct exynos_drm_overlay *overlay = &exynos_crtc->overlay; + + exynos_drm_fn_encoder(crtc, overlay, + exynos_drm_encoder_crtc_mode_set); + exynos_drm_fn_encoder(crtc, NULL, exynos_drm_encoder_crtc_commit); +} + +static void exynos_drm_overlay_update(struct exynos_drm_overlay *overlay, + struct drm_framebuffer *fb, + struct drm_display_mode *mode, + struct exynos_drm_crtc_pos *pos) +{ + struct exynos_drm_buffer_info buffer_info; + unsigned int actual_w = pos->crtc_w; + unsigned int actual_h = pos->crtc_h; + unsigned int hw_w; + unsigned int hw_h; + + /* update buffer address of framebuffer. */ + exynos_drm_fb_update_buf_off(fb, pos->fb_x, pos->fb_y, &buffer_info); + overlay->paddr = buffer_info.paddr; + overlay->vaddr = buffer_info.vaddr; + + hw_w = mode->hdisplay - pos->base_x; + hw_h = mode->vdisplay - pos->base_y; + + if (actual_w > hw_w) + actual_w = hw_w; + if (actual_h > hw_h) + actual_h = hw_h; + + overlay->offset_x = pos->base_x; + overlay->offset_y = pos->base_y; + overlay->width = actual_w; + overlay->height = actual_h; + overlay->bpp = fb->bits_per_pixel; + + DRM_DEBUG_KMS("overlay : offset_x/y(%d,%d), width/height(%d,%d)", + overlay->offset_x, overlay->offset_y, + overlay->width, overlay->height); + + overlay->buf_offsize = fb->width - actual_w; + overlay->line_size = actual_w; +} + +static int exynos_drm_crtc_update(struct drm_crtc *crtc) +{ + struct exynos_drm_crtc *exynos_crtc; + struct exynos_drm_overlay *overlay; + struct exynos_drm_crtc_pos pos; + struct drm_display_mode *mode = &crtc->mode; + struct drm_framebuffer *fb = crtc->fb; + + if (!mode || !fb) + return -EINVAL; + + exynos_crtc = to_exynos_crtc(crtc); + overlay = &exynos_crtc->overlay; + + memset(&pos, 0, sizeof(struct exynos_drm_crtc_pos)); + pos.fb_x = crtc->x; + pos.fb_y = crtc->y; + pos.crtc_w = fb->width - crtc->x; + pos.crtc_h = fb->height - crtc->y; + + exynos_drm_overlay_update(overlay, crtc->fb, mode, &pos); + + return 0; +} + +static void exynos_drm_crtc_dpms(struct drm_crtc *crtc, int mode) +{ + DRM_DEBUG_KMS("%s\n", __FILE__); + + /* TODO */ +} + +static void exynos_drm_crtc_prepare(struct drm_crtc *crtc) +{ + DRM_DEBUG_KMS("%s\n", __FILE__); + + /* drm framework doesn't check NULL. */ +} + +static void exynos_drm_crtc_commit(struct drm_crtc *crtc) +{ + DRM_DEBUG_KMS("%s\n", __FILE__); + + /* drm framework doesn't check NULL. */ +} + +static bool +exynos_drm_crtc_mode_fixup(struct drm_crtc *crtc, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + DRM_DEBUG_KMS("%s\n", __FILE__); + + /* drm framework doesn't check NULL */ + return true; +} + +static int +exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode, int x, int y, + struct drm_framebuffer *old_fb) +{ + DRM_DEBUG_KMS("%s\n", __FILE__); + + mode = adjusted_mode; + + return exynos_drm_crtc_update(crtc); +} + +static int exynos_drm_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y, + struct drm_framebuffer *old_fb) +{ + int ret; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + ret = exynos_drm_crtc_update(crtc); + if (ret) + return ret; + + exynos_drm_crtc_apply(crtc); + + return ret; +} + +static void exynos_drm_crtc_load_lut(struct drm_crtc *crtc) +{ + DRM_DEBUG_KMS("%s\n", __FILE__); + /* drm framework doesn't check NULL */ +} + +static struct drm_crtc_helper_funcs exynos_crtc_helper_funcs = { + .dpms = exynos_drm_crtc_dpms, + .prepare = exynos_drm_crtc_prepare, + .commit = exynos_drm_crtc_commit, + .mode_fixup = exynos_drm_crtc_mode_fixup, + .mode_set = exynos_drm_crtc_mode_set, + .mode_set_base = exynos_drm_crtc_mode_set_base, + .load_lut = exynos_drm_crtc_load_lut, +}; + +static int exynos_drm_crtc_page_flip(struct drm_crtc *crtc, + struct drm_framebuffer *fb, + struct drm_pending_vblank_event *event) +{ + struct drm_device *dev = crtc->dev; + struct exynos_drm_private *dev_priv = dev->dev_private; + struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); + struct drm_framebuffer *old_fb = crtc->fb; + int ret = -EINVAL; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + mutex_lock(&dev->struct_mutex); + + if (event && !dev_priv->pageflip_event) { + list_add_tail(&event->base.link, + &dev_priv->pageflip_event_list); + + ret = drm_vblank_get(dev, exynos_crtc->pipe); + if (ret) { + DRM_DEBUG("failed to acquire vblank counter\n"); + goto out; + } + + crtc->fb = fb; + ret = exynos_drm_crtc_update(crtc); + if (ret) { + crtc->fb = old_fb; + drm_vblank_put(dev, exynos_crtc->pipe); + dev_priv->pageflip_event = false; + + goto out; + } + + dev_priv->pageflip_event = true; + } +out: + mutex_unlock(&dev->struct_mutex); + return ret; +} + +static void exynos_drm_crtc_destroy(struct drm_crtc *crtc) +{ + struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); + struct exynos_drm_private *private = crtc->dev->dev_private; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + private->crtc[exynos_crtc->pipe] = NULL; + + drm_crtc_cleanup(crtc); + kfree(exynos_crtc); +} + +static struct drm_crtc_funcs exynos_crtc_funcs = { + .set_config = drm_crtc_helper_set_config, + .page_flip = exynos_drm_crtc_page_flip, + .destroy = exynos_drm_crtc_destroy, +}; + +struct exynos_drm_overlay *get_exynos_drm_overlay(struct drm_device *dev, + struct drm_crtc *crtc) +{ + struct exynos_drm_crtc *exynos_crtc = to_exynos_crtc(crtc); + + return &exynos_crtc->overlay; +} + +int exynos_drm_crtc_create(struct drm_device *dev, unsigned int nr) +{ + struct exynos_drm_crtc *exynos_crtc; + struct exynos_drm_private *private = dev->dev_private; + struct drm_crtc *crtc; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + exynos_crtc = kzalloc(sizeof(*exynos_crtc), GFP_KERNEL); + if (!exynos_crtc) { + DRM_ERROR("failed to allocate exynos crtc\n"); + return -ENOMEM; + } + + exynos_crtc->pipe = nr; + crtc = &exynos_crtc->drm_crtc; + + private->crtc[nr] = crtc; + + drm_crtc_init(dev, crtc, &exynos_crtc_funcs); + drm_crtc_helper_add(crtc, &exynos_crtc_helper_funcs); + + return 0; +} + +int exynos_drm_crtc_enable_vblank(struct drm_device *dev, int crtc) +{ + struct exynos_drm_private *private = dev->dev_private; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + exynos_drm_fn_encoder(private->crtc[crtc], &crtc, + exynos_drm_enable_vblank); + + return 0; +} + +void exynos_drm_crtc_disable_vblank(struct drm_device *dev, int crtc) +{ + struct exynos_drm_private *private = dev->dev_private; + + DRM_DEBUG_KMS("%s\n", __FILE__); + + exynos_drm_fn_encoder(private->crtc[crtc], &crtc, + exynos_drm_disable_vblank); +} + +MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>"); +MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>"); +MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>"); +MODULE_DESCRIPTION("Samsung SoC DRM CRTC Driver"); +MODULE_LICENSE("GPL"); |