blob: ef29c9a61a4617c890846c4d5f6bdc501803319a [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* i.MX IPUv3 Graphics driver
*
* Copyright (C) 2011 Sascha Hauer, Pengutronix
*/
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/export.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <video/imx-ipu-v3.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_managed.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "imx-drm.h"
#include "ipuv3-plane.h"
#define DRIVER_DESC "i.MX IPUv3 Graphics"
struct ipu_crtc {
struct device *dev;
struct drm_crtc base;
/* plane[0] is the full plane, plane[1] is the partial plane */
struct ipu_plane *plane[2];
struct ipu_dc *dc;
struct ipu_di *di;
int irq;
struct drm_pending_vblank_event *event;
};
static inline struct ipu_crtc *to_ipu_crtc(struct drm_crtc *crtc)
{
return container_of(crtc, struct ipu_crtc, base);
}
static void ipu_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
ipu_prg_enable(ipu);
ipu_dc_enable(ipu);
ipu_dc_enable_channel(ipu_crtc->dc);
ipu_di_enable(ipu_crtc->di);
}
static void ipu_crtc_disable_planes(struct ipu_crtc *ipu_crtc,
struct drm_crtc_state *old_crtc_state)
{
bool disable_partial = false;
bool disable_full = false;
struct drm_plane *plane;
drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) {
if (plane == &ipu_crtc->plane[0]->base)
disable_full = true;
if (ipu_crtc->plane[1] && plane == &ipu_crtc->plane[1]->base)
disable_partial = true;
}
if (disable_partial)
ipu_plane_disable(ipu_crtc->plane[1], true);
if (disable_full)
ipu_plane_disable(ipu_crtc->plane[0], true);
}
static void ipu_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state,
crtc);
struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
ipu_dc_disable_channel(ipu_crtc->dc);
ipu_di_disable(ipu_crtc->di);
/*
* Planes must be disabled before DC clock is removed, as otherwise the
* attached IDMACs will be left in undefined state, possibly hanging
* the IPU or even system.
*/
ipu_crtc_disable_planes(ipu_crtc, old_crtc_state);
ipu_dc_disable(ipu);
ipu_prg_disable(ipu);
drm_crtc_vblank_off(crtc);
spin_lock_irq(&crtc->dev->event_lock);
if (crtc->state->event && !crtc->state->active) {
drm_crtc_send_vblank_event(crtc, crtc->state->event);
crtc->state->event = NULL;
}
spin_unlock_irq(&crtc->dev->event_lock);
}
static void imx_drm_crtc_reset(struct drm_crtc *crtc)
{
struct imx_crtc_state *state;
if (crtc->state)
__drm_atomic_helper_crtc_destroy_state(crtc->state);
kfree(to_imx_crtc_state(crtc->state));
crtc->state = NULL;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (state)
__drm_atomic_helper_crtc_reset(crtc, &state->base);
}
static struct drm_crtc_state *imx_drm_crtc_duplicate_state(struct drm_crtc *crtc)
{
struct imx_crtc_state *state;
state = kzalloc(sizeof(*state), GFP_KERNEL);
if (!state)
return NULL;
__drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
WARN_ON(state->base.crtc != crtc);
state->base.crtc = crtc;
return &state->base;
}
static void imx_drm_crtc_destroy_state(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
__drm_atomic_helper_crtc_destroy_state(state);
kfree(to_imx_crtc_state(state));
}
static int ipu_enable_vblank(struct drm_crtc *crtc)
{
struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
enable_irq(ipu_crtc->irq);
return 0;
}
static void ipu_disable_vblank(struct drm_crtc *crtc)
{
struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
disable_irq_nosync(ipu_crtc->irq);
}
static const struct drm_crtc_funcs ipu_crtc_funcs = {
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.reset = imx_drm_crtc_reset,
.atomic_duplicate_state = imx_drm_crtc_duplicate_state,
.atomic_destroy_state = imx_drm_crtc_destroy_state,
.enable_vblank = ipu_enable_vblank,
.disable_vblank = ipu_disable_vblank,
};
static irqreturn_t ipu_irq_handler(int irq, void *dev_id)
{
struct ipu_crtc *ipu_crtc = dev_id;
struct drm_crtc *crtc = &ipu_crtc->base;
unsigned long flags;
int i;
drm_crtc_handle_vblank(crtc);
if (ipu_crtc->event) {
for (i = 0; i < ARRAY_SIZE(ipu_crtc->plane); i++) {
struct ipu_plane *plane = ipu_crtc->plane[i];
if (!plane)
continue;
if (ipu_plane_atomic_update_pending(&plane->base))
break;
}
if (i == ARRAY_SIZE(ipu_crtc->plane)) {
spin_lock_irqsave(&crtc->dev->event_lock, flags);
drm_crtc_send_vblank_event(crtc, ipu_crtc->event);
ipu_crtc->event = NULL;
drm_crtc_vblank_put(crtc);
spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
}
}
return IRQ_HANDLED;
}
static bool ipu_crtc_mode_fixup(struct drm_crtc *crtc,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
struct videomode vm;
int ret;
drm_display_mode_to_videomode(adjusted_mode, &vm);
ret = ipu_di_adjust_videomode(ipu_crtc->di, &vm);
if (ret)
return false;
if ((vm.vsync_len == 0) || (vm.hsync_len == 0))
return false;
drm_display_mode_from_videomode(&vm, adjusted_mode);
return true;
}
static int ipu_crtc_atomic_check(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
crtc);
u32 primary_plane_mask = drm_plane_mask(crtc->primary);
if (crtc_state->active && (primary_plane_mask & crtc_state->plane_mask) == 0)
return -EINVAL;
return 0;
}
static void ipu_crtc_atomic_begin(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
drm_crtc_vblank_on(crtc);
}
static void ipu_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
spin_lock_irq(&crtc->dev->event_lock);
if (crtc->state->event) {
struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
WARN_ON(drm_crtc_vblank_get(crtc));
ipu_crtc->event = crtc->state->event;
crtc->state->event = NULL;
}
spin_unlock_irq(&crtc->dev->event_lock);
}
static void ipu_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_encoder *encoder;
struct ipu_crtc *ipu_crtc = to_ipu_crtc(crtc);
struct drm_display_mode *mode = &crtc->state->adjusted_mode;
struct imx_crtc_state *imx_crtc_state = to_imx_crtc_state(crtc->state);
struct ipu_di_signal_cfg sig_cfg = {};
unsigned long encoder_types = 0;
dev_dbg(ipu_crtc->dev, "%s: mode->hdisplay: %d\n", __func__,
mode->hdisplay);
dev_dbg(ipu_crtc->dev, "%s: mode->vdisplay: %d\n", __func__,
mode->vdisplay);
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
if (encoder->crtc == crtc)
encoder_types |= BIT(encoder->encoder_type);
}
dev_dbg(ipu_crtc->dev, "%s: attached to encoder types 0x%lx\n",
__func__, encoder_types);
/*
* If we have DAC or LDB, then we need the IPU DI clock to be
* the same as the LDB DI clock. For TVDAC, derive the IPU DI
* clock from 27 MHz TVE_DI clock, but allow to divide it.
*/
if (encoder_types & (BIT(DRM_MODE_ENCODER_DAC) |
BIT(DRM_MODE_ENCODER_LVDS)))
sig_cfg.clkflags = IPU_DI_CLKMODE_SYNC | IPU_DI_CLKMODE_EXT;
else if (encoder_types & BIT(DRM_MODE_ENCODER_TVDAC))
sig_cfg.clkflags = IPU_DI_CLKMODE_EXT;
else
sig_cfg.clkflags = 0;
sig_cfg.enable_pol = !(imx_crtc_state->bus_flags & DRM_BUS_FLAG_DE_LOW);
/* Default to driving pixel data on negative clock edges */
sig_cfg.clk_pol = !!(imx_crtc_state->bus_flags &
DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE);
sig_cfg.bus_format = imx_crtc_state->bus_format;
sig_cfg.v_to_h_sync = 0;
sig_cfg.hsync_pin = imx_crtc_state->di_hsync_pin;
sig_cfg.vsync_pin = imx_crtc_state->di_vsync_pin;
drm_display_mode_to_videomode(mode, &sig_cfg.mode);
if (!IS_ALIGNED(sig_cfg.mode.hactive, 8)) {
unsigned int new_hactive = ALIGN(sig_cfg.mode.hactive, 8);
dev_warn(ipu_crtc->dev, "8-pixel align hactive %d -> %d\n",
sig_cfg.mode.hactive, new_hactive);
sig_cfg.mode.hfront_porch -= new_hactive - sig_cfg.mode.hactive;
sig_cfg.mode.hactive = new_hactive;
}
ipu_dc_init_sync(ipu_crtc->dc, ipu_crtc->di,
mode->flags & DRM_MODE_FLAG_INTERLACE,
imx_crtc_state->bus_format, sig_cfg.mode.hactive);
ipu_di_init_sync_panel(ipu_crtc->di, &sig_cfg);
}
static const struct drm_crtc_helper_funcs ipu_helper_funcs = {
.mode_fixup = ipu_crtc_mode_fixup,
.mode_set_nofb = ipu_crtc_mode_set_nofb,
.atomic_check = ipu_crtc_atomic_check,
.atomic_begin = ipu_crtc_atomic_begin,
.atomic_flush = ipu_crtc_atomic_flush,
.atomic_disable = ipu_crtc_atomic_disable,
.atomic_enable = ipu_crtc_atomic_enable,
};
static void ipu_put_resources(struct drm_device *dev, void *ptr)
{
struct ipu_crtc *ipu_crtc = ptr;
if (!IS_ERR_OR_NULL(ipu_crtc->dc))
ipu_dc_put(ipu_crtc->dc);
if (!IS_ERR_OR_NULL(ipu_crtc->di))
ipu_di_put(ipu_crtc->di);
}
static int ipu_get_resources(struct drm_device *dev, struct ipu_crtc *ipu_crtc,
struct ipu_client_platformdata *pdata)
{
struct ipu_soc *ipu = dev_get_drvdata(ipu_crtc->dev->parent);
int ret;
ipu_crtc->dc = ipu_dc_get(ipu, pdata->dc);
if (IS_ERR(ipu_crtc->dc))
return PTR_ERR(ipu_crtc->dc);
ret = drmm_add_action_or_reset(dev, ipu_put_resources, ipu_crtc);
if (ret)
return ret;
ipu_crtc->di = ipu_di_get(ipu, pdata->di);
if (IS_ERR(ipu_crtc->di))
return PTR_ERR(ipu_crtc->di);
return 0;
}
static int ipu_drm_bind(struct device *dev, struct device *master, void *data)
{
struct ipu_client_platformdata *pdata = dev->platform_data;
struct ipu_soc *ipu = dev_get_drvdata(dev->parent);
struct drm_device *drm = data;
struct ipu_plane *primary_plane;
struct ipu_crtc *ipu_crtc;
struct drm_crtc *crtc;
int dp = -EINVAL;
int ret;
if (pdata->dp >= 0)
dp = IPU_DP_FLOW_SYNC_BG;
primary_plane = ipu_plane_init(drm, ipu, pdata->dma[0], dp, 0,
DRM_PLANE_TYPE_PRIMARY);
if (IS_ERR(primary_plane))
return PTR_ERR(primary_plane);
ipu_crtc = drmm_crtc_alloc_with_planes(drm, struct ipu_crtc, base,
&primary_plane->base, NULL,
&ipu_crtc_funcs, NULL);
if (IS_ERR(ipu_crtc))
return PTR_ERR(ipu_crtc);
ipu_crtc->dev = dev;
ipu_crtc->plane[0] = primary_plane;
crtc = &ipu_crtc->base;
crtc->port = pdata->of_node;
drm_crtc_helper_add(crtc, &ipu_helper_funcs);
ret = ipu_get_resources(drm, ipu_crtc, pdata);
if (ret) {
dev_err(ipu_crtc->dev, "getting resources failed with %d.\n",
ret);
return ret;
}
/* If this crtc is using the DP, add an overlay plane */
if (pdata->dp >= 0 && pdata->dma[1] > 0) {
ipu_crtc->plane[1] = ipu_plane_init(drm, ipu, pdata->dma[1],
IPU_DP_FLOW_SYNC_FG,
drm_crtc_mask(&ipu_crtc->base),
DRM_PLANE_TYPE_OVERLAY);
if (IS_ERR(ipu_crtc->plane[1]))
ipu_crtc->plane[1] = NULL;
}
ipu_crtc->irq = ipu_plane_irq(ipu_crtc->plane[0]);
ret = devm_request_irq(ipu_crtc->dev, ipu_crtc->irq, ipu_irq_handler, 0,
"imx_drm", ipu_crtc);
if (ret < 0) {
dev_err(ipu_crtc->dev, "irq request failed with %d.\n", ret);
return ret;
}
/* Only enable IRQ when we actually need it to trigger work. */
disable_irq(ipu_crtc->irq);
return 0;
}
static const struct component_ops ipu_crtc_ops = {
.bind = ipu_drm_bind,
};
static int ipu_drm_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
int ret;
if (!dev->platform_data)
return -EINVAL;
ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
if (ret)
return ret;
return component_add(dev, &ipu_crtc_ops);
}
static void ipu_drm_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &ipu_crtc_ops);
}
struct platform_driver ipu_drm_driver = {
.driver = {
.name = "imx-ipuv3-crtc",
},
.probe = ipu_drm_probe,
.remove_new = ipu_drm_remove,
};