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// SPDX-License-Identifier: GPL-2.0
/*
* (C) COPYRIGHT 2016 ARM Limited. All rights reserved.
* Author: Brian Starkey <brian.starkey@arm.com>
*
* ARM Mali DP Writeback connector implementation
*/
#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/drmP.h>
#include <drm/drm_writeback.h>
#include "malidp_drv.h"
#include "malidp_hw.h"
#include "malidp_mw.h"
#define to_mw_state(_state) (struct malidp_mw_connector_state *)(_state)
struct malidp_mw_connector_state {
struct drm_connector_state base;
dma_addr_t addrs[2];
s32 pitches[2];
u8 format;
u8 n_planes;
};
static int malidp_mw_connector_get_modes(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
return drm_add_modes_noedid(connector, dev->mode_config.max_width,
dev->mode_config.max_height);
}
static enum drm_mode_status
malidp_mw_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct drm_device *dev = connector->dev;
struct drm_mode_config *mode_config = &dev->mode_config;
int w = mode->hdisplay, h = mode->vdisplay;
if ((w < mode_config->min_width) || (w > mode_config->max_width))
return MODE_BAD_HVALUE;
if ((h < mode_config->min_height) || (h > mode_config->max_height))
return MODE_BAD_VVALUE;
return MODE_OK;
}
const struct drm_connector_helper_funcs malidp_mw_connector_helper_funcs = {
.get_modes = malidp_mw_connector_get_modes,
.mode_valid = malidp_mw_connector_mode_valid,
};
static void malidp_mw_connector_reset(struct drm_connector *connector)
{
struct malidp_mw_connector_state *mw_state =
kzalloc(sizeof(*mw_state), GFP_KERNEL);
if (connector->state)
__drm_atomic_helper_connector_destroy_state(connector->state);
kfree(connector->state);
__drm_atomic_helper_connector_reset(connector, &mw_state->base);
}
static enum drm_connector_status
malidp_mw_connector_detect(struct drm_connector *connector, bool force)
{
return connector_status_connected;
}
static void malidp_mw_connector_destroy(struct drm_connector *connector)
{
drm_connector_cleanup(connector);
}
static struct drm_connector_state *
malidp_mw_connector_duplicate_state(struct drm_connector *connector)
{
struct malidp_mw_connector_state *mw_state;
if (WARN_ON(!connector->state))
return NULL;
mw_state = kzalloc(sizeof(*mw_state), GFP_KERNEL);
if (!mw_state)
return NULL;
/* No need to preserve any of our driver-local data */
__drm_atomic_helper_connector_duplicate_state(connector, &mw_state->base);
return &mw_state->base;
}
static const struct drm_connector_funcs malidp_mw_connector_funcs = {
.reset = malidp_mw_connector_reset,
.detect = malidp_mw_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = malidp_mw_connector_destroy,
.atomic_duplicate_state = malidp_mw_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static int
malidp_mw_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct malidp_mw_connector_state *mw_state = to_mw_state(conn_state);
struct malidp_drm *malidp = encoder->dev->dev_private;
struct drm_framebuffer *fb;
int i, n_planes;
if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
return 0;
fb = conn_state->writeback_job->fb;
if ((fb->width != crtc_state->mode.hdisplay) ||
(fb->height != crtc_state->mode.vdisplay)) {
DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n",
fb->width, fb->height);
return -EINVAL;
}
mw_state->format =
malidp_hw_get_format_id(&malidp->dev->hw->map, SE_MEMWRITE,
fb->format->format);
if (mw_state->format == MALIDP_INVALID_FORMAT_ID) {
struct drm_format_name_buf format_name;
DRM_DEBUG_KMS("Invalid pixel format %s\n",
drm_get_format_name(fb->format->format,
&format_name));
return -EINVAL;
}
n_planes = drm_format_num_planes(fb->format->format);
for (i = 0; i < n_planes; i++) {
struct drm_gem_cma_object *obj = drm_fb_cma_get_gem_obj(fb, i);
/* memory write buffers are never rotated */
u8 alignment = malidp_hw_get_pitch_align(malidp->dev, 0);
if (fb->pitches[i] & (alignment - 1)) {
DRM_DEBUG_KMS("Invalid pitch %u for plane %d\n",
fb->pitches[i], i);
return -EINVAL;
}
mw_state->pitches[i] = fb->pitches[i];
mw_state->addrs[i] = obj->paddr + fb->offsets[i];
}
mw_state->n_planes = n_planes;
return 0;
}
static const struct drm_encoder_helper_funcs malidp_mw_encoder_helper_funcs = {
.atomic_check = malidp_mw_encoder_atomic_check,
};
static u32 *get_writeback_formats(struct malidp_drm *malidp, int *n_formats)
{
const struct malidp_hw_regmap *map = &malidp->dev->hw->map;
u32 *formats;
int n, i;
formats = kcalloc(map->n_pixel_formats, sizeof(*formats),
GFP_KERNEL);
if (!formats)
return NULL;
for (n = 0, i = 0; i < map->n_pixel_formats; i++) {
if (map->pixel_formats[i].layer & SE_MEMWRITE)
formats[n++] = map->pixel_formats[i].format;
}
*n_formats = n;
return formats;
}
int malidp_mw_connector_init(struct drm_device *drm)
{
struct malidp_drm *malidp = drm->dev_private;
u32 *formats;
int ret, n_formats;
if (!malidp->dev->hw->enable_memwrite)
return 0;
malidp->mw_connector.encoder.possible_crtcs = 1 << drm_crtc_index(&malidp->crtc);
drm_connector_helper_add(&malidp->mw_connector.base,
&malidp_mw_connector_helper_funcs);
formats = get_writeback_formats(malidp, &n_formats);
if (!formats)
return -ENOMEM;
ret = drm_writeback_connector_init(drm, &malidp->mw_connector,
&malidp_mw_connector_funcs,
&malidp_mw_encoder_helper_funcs,
formats, n_formats);
kfree(formats);
if (ret)
return ret;
return 0;
}
void malidp_mw_atomic_commit(struct drm_device *drm,
struct drm_atomic_state *old_state)
{
struct malidp_drm *malidp = drm->dev_private;
struct drm_writeback_connector *mw_conn = &malidp->mw_connector;
struct drm_connector_state *conn_state = mw_conn->base.state;
struct malidp_hw_device *hwdev = malidp->dev;
struct malidp_mw_connector_state *mw_state;
if (!conn_state)
return;
mw_state = to_mw_state(conn_state);
if (conn_state->writeback_job && conn_state->writeback_job->fb) {
struct drm_framebuffer *fb = conn_state->writeback_job->fb;
DRM_DEV_DEBUG_DRIVER(drm->dev,
"Enable memwrite %ux%u:%d %pad fmt: %u\n",
fb->width, fb->height,
mw_state->pitches[0],
&mw_state->addrs[0],
mw_state->format);
drm_writeback_queue_job(mw_conn, conn_state->writeback_job);
conn_state->writeback_job = NULL;
hwdev->hw->enable_memwrite(hwdev, mw_state->addrs,
mw_state->pitches, mw_state->n_planes,
fb->width, fb->height, mw_state->format);
} else {
DRM_DEV_DEBUG_DRIVER(drm->dev, "Disable memwrite\n");
hwdev->hw->disable_memwrite(hwdev);
}
}
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