diff options
Diffstat (limited to 'drivers/gpu/drm/sti/sti_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/sti/sti_crtc.c | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sti/sti_crtc.c b/drivers/gpu/drm/sti/sti_crtc.c new file mode 100644 index 000000000..5824e6aca --- /dev/null +++ b/drivers/gpu/drm/sti/sti_crtc.c @@ -0,0 +1,370 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) STMicroelectronics SA 2014 + * Authors: Benjamin Gaignard <benjamin.gaignard@st.com> + * Fabien Dessenne <fabien.dessenne@st.com> + * for STMicroelectronics. + */ + +#include <linux/clk.h> + +#include <drm/drmP.h> +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_plane_helper.h> + +#include "sti_compositor.h" +#include "sti_crtc.h" +#include "sti_drv.h" +#include "sti_vid.h" +#include "sti_vtg.h" + +static void sti_crtc_atomic_enable(struct drm_crtc *crtc, + struct drm_crtc_state *old_state) +{ + struct sti_mixer *mixer = to_sti_mixer(crtc); + + DRM_DEBUG_DRIVER("\n"); + + mixer->status = STI_MIXER_READY; + + drm_crtc_vblank_on(crtc); +} + +static void sti_crtc_atomic_disable(struct drm_crtc *crtc, + struct drm_crtc_state *old_state) +{ + struct sti_mixer *mixer = to_sti_mixer(crtc); + + DRM_DEBUG_DRIVER("\n"); + + mixer->status = STI_MIXER_DISABLING; +} + +static int +sti_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode) +{ + struct sti_mixer *mixer = to_sti_mixer(crtc); + struct device *dev = mixer->dev; + struct sti_compositor *compo = dev_get_drvdata(dev); + struct clk *compo_clk, *pix_clk; + int rate = mode->clock * 1000; + + DRM_DEBUG_KMS("CRTC:%d (%s) mode:%d (%s)\n", + crtc->base.id, sti_mixer_to_str(mixer), + mode->base.id, mode->name); + + DRM_DEBUG_KMS("%d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n", + mode->vrefresh, mode->clock, + mode->hdisplay, + mode->hsync_start, mode->hsync_end, + mode->htotal, + mode->vdisplay, + mode->vsync_start, mode->vsync_end, + mode->vtotal, mode->type, mode->flags); + + if (mixer->id == STI_MIXER_MAIN) { + compo_clk = compo->clk_compo_main; + pix_clk = compo->clk_pix_main; + } else { + compo_clk = compo->clk_compo_aux; + pix_clk = compo->clk_pix_aux; + } + + /* Prepare and enable the compo IP clock */ + if (clk_prepare_enable(compo_clk)) { + DRM_INFO("Failed to prepare/enable compositor clk\n"); + goto compo_error; + } + + /* Set rate and prepare/enable pixel clock */ + if (clk_set_rate(pix_clk, rate) < 0) { + DRM_ERROR("Cannot set rate (%dHz) for pix clk\n", rate); + goto pix_error; + } + if (clk_prepare_enable(pix_clk)) { + DRM_ERROR("Failed to prepare/enable pix clk\n"); + goto pix_error; + } + + sti_vtg_set_config(compo->vtg[mixer->id], &crtc->mode); + + if (sti_mixer_active_video_area(mixer, &crtc->mode)) { + DRM_ERROR("Can't set active video area\n"); + goto mixer_error; + } + + return 0; + +mixer_error: + clk_disable_unprepare(pix_clk); +pix_error: + clk_disable_unprepare(compo_clk); +compo_error: + return -EINVAL; +} + +static void sti_crtc_disable(struct drm_crtc *crtc) +{ + struct sti_mixer *mixer = to_sti_mixer(crtc); + struct device *dev = mixer->dev; + struct sti_compositor *compo = dev_get_drvdata(dev); + + DRM_DEBUG_KMS("CRTC:%d (%s)\n", crtc->base.id, sti_mixer_to_str(mixer)); + + /* Disable Background */ + sti_mixer_set_background_status(mixer, false); + + drm_crtc_vblank_off(crtc); + + /* Disable pixel clock and compo IP clocks */ + if (mixer->id == STI_MIXER_MAIN) { + clk_disable_unprepare(compo->clk_pix_main); + clk_disable_unprepare(compo->clk_compo_main); + } else { + clk_disable_unprepare(compo->clk_pix_aux); + clk_disable_unprepare(compo->clk_compo_aux); + } + + mixer->status = STI_MIXER_DISABLED; +} + +static void +sti_crtc_mode_set_nofb(struct drm_crtc *crtc) +{ + sti_crtc_mode_set(crtc, &crtc->state->adjusted_mode); +} + +static void sti_crtc_atomic_flush(struct drm_crtc *crtc, + struct drm_crtc_state *old_crtc_state) +{ + struct drm_device *drm_dev = crtc->dev; + struct sti_mixer *mixer = to_sti_mixer(crtc); + struct sti_compositor *compo = dev_get_drvdata(mixer->dev); + struct drm_plane *p; + struct drm_pending_vblank_event *event; + unsigned long flags; + + DRM_DEBUG_DRIVER("\n"); + + /* perform plane actions */ + list_for_each_entry(p, &drm_dev->mode_config.plane_list, head) { + struct sti_plane *plane = to_sti_plane(p); + + switch (plane->status) { + case STI_PLANE_UPDATED: + /* ignore update for other CRTC */ + if (p->state->crtc != crtc) + continue; + + /* update planes tag as updated */ + DRM_DEBUG_DRIVER("update plane %s\n", + sti_plane_to_str(plane)); + + if (sti_mixer_set_plane_depth(mixer, plane)) { + DRM_ERROR("Cannot set plane %s depth\n", + sti_plane_to_str(plane)); + break; + } + + if (sti_mixer_set_plane_status(mixer, plane, true)) { + DRM_ERROR("Cannot enable plane %s at mixer\n", + sti_plane_to_str(plane)); + break; + } + + /* if plane is HQVDP_0 then commit the vid[0] */ + if (plane->desc == STI_HQVDP_0) + sti_vid_commit(compo->vid[0], p->state); + + plane->status = STI_PLANE_READY; + + break; + case STI_PLANE_DISABLING: + /* disabling sequence for planes tag as disabling */ + DRM_DEBUG_DRIVER("disable plane %s from mixer\n", + sti_plane_to_str(plane)); + + if (sti_mixer_set_plane_status(mixer, plane, false)) { + DRM_ERROR("Cannot disable plane %s at mixer\n", + sti_plane_to_str(plane)); + continue; + } + + if (plane->desc == STI_CURSOR) + /* tag plane status for disabled */ + plane->status = STI_PLANE_DISABLED; + else + /* tag plane status for flushing */ + plane->status = STI_PLANE_FLUSHING; + + /* if plane is HQVDP_0 then disable the vid[0] */ + if (plane->desc == STI_HQVDP_0) + sti_vid_disable(compo->vid[0]); + + break; + default: + /* Other status case are not handled */ + break; + } + } + + event = crtc->state->event; + if (event) { + crtc->state->event = NULL; + + spin_lock_irqsave(&crtc->dev->event_lock, flags); + if (drm_crtc_vblank_get(crtc) == 0) + drm_crtc_arm_vblank_event(crtc, event); + else + drm_crtc_send_vblank_event(crtc, event); + spin_unlock_irqrestore(&crtc->dev->event_lock, flags); + } +} + +static const struct drm_crtc_helper_funcs sti_crtc_helper_funcs = { + .mode_set_nofb = sti_crtc_mode_set_nofb, + .atomic_flush = sti_crtc_atomic_flush, + .atomic_enable = sti_crtc_atomic_enable, + .atomic_disable = sti_crtc_atomic_disable, +}; + +static void sti_crtc_destroy(struct drm_crtc *crtc) +{ + DRM_DEBUG_KMS("\n"); + drm_crtc_cleanup(crtc); +} + +static int sti_crtc_set_property(struct drm_crtc *crtc, + struct drm_property *property, + uint64_t val) +{ + DRM_DEBUG_KMS("\n"); + return 0; +} + +int sti_crtc_vblank_cb(struct notifier_block *nb, + unsigned long event, void *data) +{ + struct sti_compositor *compo; + struct drm_crtc *crtc = data; + struct sti_mixer *mixer; + struct sti_private *priv; + unsigned int pipe; + + priv = crtc->dev->dev_private; + pipe = drm_crtc_index(crtc); + compo = container_of(nb, struct sti_compositor, vtg_vblank_nb[pipe]); + mixer = compo->mixer[pipe]; + + if ((event != VTG_TOP_FIELD_EVENT) && + (event != VTG_BOTTOM_FIELD_EVENT)) { + DRM_ERROR("unknown event: %lu\n", event); + return -EINVAL; + } + + drm_crtc_handle_vblank(crtc); + + if (mixer->status == STI_MIXER_DISABLING) { + struct drm_plane *p; + + /* Disable mixer only if all overlay planes (GDP and VDP) + * are disabled */ + list_for_each_entry(p, &crtc->dev->mode_config.plane_list, + head) { + struct sti_plane *plane = to_sti_plane(p); + + if ((plane->desc & STI_PLANE_TYPE_MASK) <= STI_VDP) + if (plane->status != STI_PLANE_DISABLED) + return 0; + } + sti_crtc_disable(crtc); + } + + return 0; +} + +int sti_crtc_enable_vblank(struct drm_device *dev, unsigned int pipe) +{ + struct sti_private *dev_priv = dev->dev_private; + struct sti_compositor *compo = dev_priv->compo; + struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe]; + struct drm_crtc *crtc = &compo->mixer[pipe]->drm_crtc; + struct sti_vtg *vtg = compo->vtg[pipe]; + + DRM_DEBUG_DRIVER("\n"); + + if (sti_vtg_register_client(vtg, vtg_vblank_nb, crtc)) { + DRM_ERROR("Cannot register VTG notifier\n"); + return -EINVAL; + } + + return 0; +} + +void sti_crtc_disable_vblank(struct drm_device *drm_dev, unsigned int pipe) +{ + struct sti_private *priv = drm_dev->dev_private; + struct sti_compositor *compo = priv->compo; + struct notifier_block *vtg_vblank_nb = &compo->vtg_vblank_nb[pipe]; + struct sti_vtg *vtg = compo->vtg[pipe]; + + DRM_DEBUG_DRIVER("\n"); + + if (sti_vtg_unregister_client(vtg, vtg_vblank_nb)) + DRM_DEBUG_DRIVER("Warning: cannot unregister VTG notifier\n"); +} + +static int sti_crtc_late_register(struct drm_crtc *crtc) +{ + struct sti_mixer *mixer = to_sti_mixer(crtc); + struct sti_compositor *compo = dev_get_drvdata(mixer->dev); + + if (drm_crtc_index(crtc) == 0) + return sti_compositor_debugfs_init(compo, crtc->dev->primary); + + return 0; +} + +static const struct drm_crtc_funcs sti_crtc_funcs = { + .set_config = drm_atomic_helper_set_config, + .page_flip = drm_atomic_helper_page_flip, + .destroy = sti_crtc_destroy, + .set_property = sti_crtc_set_property, + .reset = drm_atomic_helper_crtc_reset, + .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, + .late_register = sti_crtc_late_register, +}; + +bool sti_crtc_is_main(struct drm_crtc *crtc) +{ + struct sti_mixer *mixer = to_sti_mixer(crtc); + + if (mixer->id == STI_MIXER_MAIN) + return true; + + return false; +} + +int sti_crtc_init(struct drm_device *drm_dev, struct sti_mixer *mixer, + struct drm_plane *primary, struct drm_plane *cursor) +{ + struct drm_crtc *crtc = &mixer->drm_crtc; + int res; + + res = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor, + &sti_crtc_funcs, NULL); + if (res) { + DRM_ERROR("Can't initialize CRTC\n"); + return -EINVAL; + } + + drm_crtc_helper_add(crtc, &sti_crtc_helper_funcs); + + DRM_DEBUG_DRIVER("drm CRTC:%d mapped to %s\n", + crtc->base.id, sti_mixer_to_str(mixer)); + + return 0; +} |