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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
*/
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_vblank.h>
#include "tidss_crtc.h"
#include "tidss_dispc.h"
#include "tidss_drv.h"
#include "tidss_irq.h"
#include "tidss_plane.h"
/* Page flip and frame done IRQs */
static void tidss_crtc_finish_page_flip(struct tidss_crtc *tcrtc)
{
struct drm_device *ddev = tcrtc->crtc.dev;
struct tidss_device *tidss = to_tidss(ddev);
struct drm_pending_vblank_event *event;
unsigned long flags;
bool busy;
spin_lock_irqsave(&ddev->event_lock, flags);
/*
* New settings are taken into use at VFP, and GO bit is cleared at
* the same time. This happens before the vertical blank interrupt.
* So there is a small change that the driver sets GO bit after VFP, but
* before vblank, and we have to check for that case here.
*/
busy = dispc_vp_go_busy(tidss->dispc, tcrtc->hw_videoport);
if (busy) {
spin_unlock_irqrestore(&ddev->event_lock, flags);
return;
}
event = tcrtc->event;
tcrtc->event = NULL;
if (!event) {
spin_unlock_irqrestore(&ddev->event_lock, flags);
return;
}
drm_crtc_send_vblank_event(&tcrtc->crtc, event);
spin_unlock_irqrestore(&ddev->event_lock, flags);
drm_crtc_vblank_put(&tcrtc->crtc);
}
void tidss_crtc_vblank_irq(struct drm_crtc *crtc)
{
struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
drm_crtc_handle_vblank(crtc);
tidss_crtc_finish_page_flip(tcrtc);
}
void tidss_crtc_framedone_irq(struct drm_crtc *crtc)
{
struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
complete(&tcrtc->framedone_completion);
}
void tidss_crtc_error_irq(struct drm_crtc *crtc, u64 irqstatus)
{
struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
dev_err_ratelimited(crtc->dev->dev, "CRTC%u SYNC LOST: (irq %llx)\n",
tcrtc->hw_videoport, irqstatus);
}
/* drm_crtc_helper_funcs */
static int tidss_crtc_atomic_check(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
struct drm_device *ddev = crtc->dev;
struct tidss_device *tidss = to_tidss(ddev);
struct dispc_device *dispc = tidss->dispc;
struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
u32 hw_videoport = tcrtc->hw_videoport;
const struct drm_display_mode *mode;
enum drm_mode_status ok;
dev_dbg(ddev->dev, "%s\n", __func__);
if (!state->enable)
return 0;
mode = &state->adjusted_mode;
ok = dispc_vp_mode_valid(dispc, hw_videoport, mode);
if (ok != MODE_OK) {
dev_dbg(ddev->dev, "%s: bad mode: %ux%u pclk %u kHz\n",
__func__, mode->hdisplay, mode->vdisplay, mode->clock);
return -EINVAL;
}
return dispc_vp_bus_check(dispc, hw_videoport, state);
}
/*
* This needs all affected planes to be present in the atomic
* state. The untouched planes are added to the state in
* tidss_atomic_check().
*/
static void tidss_crtc_position_planes(struct tidss_device *tidss,
struct drm_crtc *crtc,
struct drm_crtc_state *old_state,
bool newmodeset)
{
struct drm_atomic_state *ostate = old_state->state;
struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
struct drm_crtc_state *cstate = crtc->state;
int layer;
if (!newmodeset && !cstate->zpos_changed &&
!to_tidss_crtc_state(cstate)->plane_pos_changed)
return;
for (layer = 0; layer < tidss->feat->num_planes; layer++) {
struct drm_plane_state *pstate;
struct drm_plane *plane;
bool layer_active = false;
int i;
for_each_new_plane_in_state(ostate, plane, pstate, i) {
if (pstate->crtc != crtc || !pstate->visible)
continue;
if (pstate->normalized_zpos == layer) {
layer_active = true;
break;
}
}
if (layer_active) {
struct tidss_plane *tplane = to_tidss_plane(plane);
dispc_ovr_set_plane(tidss->dispc, tplane->hw_plane_id,
tcrtc->hw_videoport,
pstate->crtc_x, pstate->crtc_y,
layer);
}
dispc_ovr_enable_layer(tidss->dispc, tcrtc->hw_videoport, layer,
layer_active);
}
}
static void tidss_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
struct drm_device *ddev = crtc->dev;
struct tidss_device *tidss = to_tidss(ddev);
unsigned long flags;
dev_dbg(ddev->dev,
"%s: %s enabled %d, needs modeset %d, event %p\n", __func__,
crtc->name, drm_atomic_crtc_needs_modeset(crtc->state),
crtc->state->enable, crtc->state->event);
/* There is nothing to do if CRTC is not going to be enabled. */
if (!crtc->state->enable)
return;
/*
* Flush CRTC changes with go bit only if new modeset is not
* coming, so CRTC is enabled trough out the commit.
*/
if (drm_atomic_crtc_needs_modeset(crtc->state))
return;
/* If the GO bit is stuck we better quit here. */
if (WARN_ON(dispc_vp_go_busy(tidss->dispc, tcrtc->hw_videoport)))
return;
/* We should have event if CRTC is enabled through out this commit. */
if (WARN_ON(!crtc->state->event))
return;
/* Write vp properties to HW if needed. */
dispc_vp_setup(tidss->dispc, tcrtc->hw_videoport, crtc->state, false);
/* Update plane positions if needed. */
tidss_crtc_position_planes(tidss, crtc, old_crtc_state, false);
WARN_ON(drm_crtc_vblank_get(crtc) != 0);
spin_lock_irqsave(&ddev->event_lock, flags);
dispc_vp_go(tidss->dispc, tcrtc->hw_videoport);
WARN_ON(tcrtc->event);
tcrtc->event = crtc->state->event;
crtc->state->event = NULL;
spin_unlock_irqrestore(&ddev->event_lock, flags);
}
static void tidss_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct tidss_crtc *tcrtc = to_tidss_crtc(crtc);
struct drm_device *ddev = crtc->dev;
struct tidss_device *tidss = to_tidss(ddev);
const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
unsigned long flags;
int r;
dev_dbg(ddev->dev, "%s, event %p\n", __func__, crtc->state->event);
tidss_runtime_get(tidss);
r = dispc_vp_set_clk_rate(tidss->dispc, tcrtc->hw_videoport,
mode->clock * 1000);
if (r != 0)
return;
r = dispc_vp_enable_clk(tidss->dispc, tcrtc->hw_videoport);
if (r != 0)
return;
dispc_vp_setup(tidss->dispc, tcrtc->hw_videoport, crtc->state, true);
tidss_crtc_position_planes(tidss, crtc, old_state, true);
/* Turn vertical blanking interrupt reporting on. */
drm_crtc_vblank_on(crtc);
dispc_vp_prepare(tidss->dispc, tcrtc->hw_videoport, crtc->state);
dispc_vp_enable(tidss->dispc, tcrtc->hw_videoport, crtc->state);
spin_lock_irqsave(&ddev->event_lock, flags);
if (crtc->state->event) {
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