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// SPDX-License-Identifier: GPL-2.0+
/*
* shmob_drm_kms.c -- SH Mobile DRM Mode Setting
*
* Copyright (C) 2012 Renesas Electronics Corporation
*
* Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*/
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_gem_cma_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_regs.h"
/* -----------------------------------------------------------------------------
* Format helpers
*/
static const struct shmob_drm_format_info shmob_drm_format_infos[] = {
{
.fourcc = DRM_FORMAT_RGB565,
.bpp = 16,
.yuv = false,
.lddfr = LDDFR_PKF_RGB16,
}, {
.fourcc = DRM_FORMAT_RGB888,
.bpp = 24,
.yuv = false,
.lddfr = LDDFR_PKF_RGB24,
}, {
.fourcc = DRM_FORMAT_ARGB8888,
.bpp = 32,
.yuv = false,
.lddfr = LDDFR_PKF_ARGB32,
}, {
.fourcc = DRM_FORMAT_NV12,
.bpp = 12,
.yuv = true,
.lddfr = LDDFR_CC | LDDFR_YF_420,
}, {
.fourcc = DRM_FORMAT_NV21,
.bpp = 12,
.yuv = true,
.lddfr = LDDFR_CC | LDDFR_YF_420,
}, {
.fourcc = DRM_FORMAT_NV16,
.bpp = 16,
.yuv = true,
.lddfr = LDDFR_CC | LDDFR_YF_422,
}, {
.fourcc = DRM_FORMAT_NV61,
.bpp = 16,
.yuv = true,
.lddfr = LDDFR_CC | LDDFR_YF_422,
}, {
.fourcc = DRM_FORMAT_NV24,
.bpp = 24,
.yuv = true,
.lddfr = LDDFR_CC | LDDFR_YF_444,
}, {
.fourcc = DRM_FORMAT_NV42,
.bpp = 24,
.yuv = true,
.lddfr = LDDFR_CC | LDDFR_YF_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 %08x\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 (format->yuv) {
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,
};
int shmob_drm_modeset_init(struct shmob_drm_device *sdev)
{
int ret;
ret = drmm_mode_config_init(sdev->ddev);
if (ret)
return ret;
shmob_drm_crtc_create(sdev);
shmob_drm_encoder_create(sdev);
shmob_drm_connector_create(sdev, &sdev->encoder.encoder);
drm_kms_helper_poll_init(sdev->ddev);
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;
drm_helper_disable_unused_functions(sdev->ddev);
return 0;
}
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