// SPDX-License-Identifier: GPL-2.0+
/*
* shmob_drm_kms.c -- SH Mobile DRM Mode Setting
*
* Copyright (C) 2012 Renesas Electronics Corporation
*
* Laurent Pinchart ([email protected])
*/
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_probe_helper.h>
#include "shmob_drm_crtc.h"
#include "shmob_drm_drv.h"
#include "shmob_drm_kms.h"
#include "shmob_drm_plane.h"
#include "shmob_drm_regs.h"
/* -----------------------------------------------------------------------------
* Format helpers
*/
static const struct shmob_drm_format_info shmob_drm_format_infos[] = {
{
.fourcc = DRM_FORMAT_RGB565,
.bpp = 16,
.lddfr = LDDFR_PKF_RGB16,
.ldddsr = LDDDSR_LS | LDDDSR_WS,
.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16,
}, {
.fourcc = DRM_FORMAT_RGB888,
.bpp = 24,
.lddfr = LDDFR_PKF_RGB24,
.ldddsr = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS,
.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
LDBBSIFR_SWPB | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24,
}, {
.fourcc = DRM_FORMAT_ARGB8888,
.bpp = 32,
.lddfr = LDDFR_PKF_ARGB32,
.ldddsr = LDDDSR_LS,
.ldbbsifr = LDBBSIFR_AL_PK | LDBBSIFR_SWPL | LDBBSIFR_RY |
LDBBSIFR_RPKF_ARGB32,
}, {
.fourcc = DRM_FORMAT_XRGB8888,
.bpp = 32,
.lddfr = LDDFR_PKF_ARGB32,
.ldddsr = LDDDSR_LS,
.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_RY |
LDBBSIFR_RPKF_ARGB32,
}, {
.fourcc = DRM_FORMAT_NV12,
.bpp = 12,
.lddfr = LDDFR_CC | LDDFR_YF_420,
.ldddsr = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS,
.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
LDBBSIFR_SWPB | LDBBSIFR_CHRR_420,
}, {
.fourcc = DRM_FORMAT_NV21,
.bpp = 12,
.lddfr = LDDFR_CC | LDDFR_YF_420,
.ldddsr = LDDDSR_LS | LDDDSR_WS,
.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
LDBBSIFR_CHRR_420,
}, {
.fourcc = DRM_FORMAT_NV16,
.bpp = 16,
.lddfr = LDDFR_CC | LDDFR_YF_422,
.ldddsr = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS,
.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
LDBBSIFR_SWPB | LDBBSIFR_CHRR_422,
}, {
.fourcc = DRM_FORMAT_NV61,
.bpp = 16,
.lddfr = LDDFR_CC | LDDFR_YF_422,
.ldddsr = LDDDSR_LS | LDDDSR_WS,
.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
LDBBSIFR_CHRR_422,
}, {
.fourcc = DRM_FORMAT_NV24,
.bpp = 24,
.lddfr = LDDFR_CC | LDDFR_YF_444,
.ldddsr = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS,
.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
LDBBSIFR_SWPB | LDBBSIFR_CHRR_444,
}, {
.fourcc = DRM_FORMAT_NV42,
.bpp = 24,
.lddfr = LDDFR_CC | LDDFR_YF_444,
.ldddsr = LDDDSR_LS | LDDDSR_WS,
.ldbbsifr = LDBBSIFR_AL_1 | LDBBSIFR_SWPL | LDBBSIFR_SWPW |
LDBBSIFR_CHRR_444,
},
};
const struct shmob_drm_format_info *shmob_drm_format_info(u32 fourcc)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(shmob_drm_format_infos); ++i) {
if (shmob_drm_format_infos[i].fourcc == fourcc)
return &shmob_drm_format_infos[i];
}
return NULL;
}
/* -----------------------------------------------------------------------------
* Frame buffer
*/
static struct drm_framebuffer *
shmob_drm_fb_create(struct drm_device *dev, struct drm_file *file_priv,
const struct drm_mode_fb_cmd2 *mode_cmd)
{
const struct shmob_drm_format_info *format;
format = shmob_drm_format_info(mode_cmd->pixel_format);
if (format == NULL) {
dev_dbg(dev->dev, "unsupported pixel format %p4cc\n",
&mode_cmd->pixel_format);
return ERR_PTR(-EINVAL);
}
if (mode_cmd->pitches[0] & 7 || mode_cmd->pitches[0] >= 65536) {
dev_dbg(dev->dev, "invalid pitch value %u\n",
mode_cmd->pitches[0]);
return ERR_PTR(-EINVAL);
}
if (shmob_drm_format_is_yuv(format)) {
unsigned int chroma_cpp = format->bpp == 24 ? 2 : 1;
if (mode_cmd->pitches[1] != mode_cmd->pitches[0] * chroma_cpp) {
dev_dbg(dev->dev,
"luma and chroma pitches do not match\n");
return ERR_PTR(-EINVAL);
}
}
return drm_gem_fb_create(dev, file_priv, mode_cmd);
}
static const struct drm_mode_config_funcs shmob_drm_mode_config_funcs = {
.fb_create = shmob_drm_fb_create,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
};
int shmob_drm_modeset_init(struct shmob_drm_device *sdev)
{
struct drm_device *dev = &sdev->ddev;
int ret;
ret = drmm_mode_config_init(dev);
if (ret)
return ret;
ret = shmob_drm_crtc_create(sdev);
if (ret < 0)
return ret;
ret = shmob_drm_encoder_create(sdev);
if (ret < 0)
return ret;
ret = shmob_drm_connector_create(sdev, &sdev->encoder);
if (ret < 0)
return ret;
drm_mode_config_reset(dev);
drm_kms_helper_poll_init(dev);
sdev->ddev.mode_config.min_width = 0;
sdev->ddev.mode_config.min_height = 0;
sdev->ddev.mode_config.max_width = 4095;
sdev->ddev.mode_config.max_height = 4095;
sdev->ddev.mode_config.funcs = &shmob_drm_mode_config_funcs;
return 0;
}