/*
* Copyright (C) 2015 Broadcom
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
/**
* DOC: VC4 plane module
*
* Each DRM plane is a layer of pixels being scanned out by the HVS.
*
* At atomic modeset check time, we compute the HVS display element
* state that would be necessary for displaying the plane (giving us a
* chance to figure out if a plane configuration is invalid), then at
* atomic flush time the CRTC will ask us to write our element state
* into the region of the HVS that it has allocated for us.
*/
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_atomic_uapi.h>
#include "uapi/drm/vc4_drm.h"
#include "vc4_drv.h"
#include "vc4_regs.h"
static const struct hvs_format {
u32 drm; /* DRM_FORMAT_* */
u32 hvs; /* HVS_FORMAT_* */
u32 pixel_order;
} hvs_formats[] = {
{
.drm = DRM_FORMAT_XRGB8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
.pixel_order = HVS_PIXEL_ORDER_ABGR,
},
{
.drm = DRM_FORMAT_ARGB8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
.pixel_order = HVS_PIXEL_ORDER_ABGR,
},
{
.drm = DRM_FORMAT_ABGR8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
.pixel_order = HVS_PIXEL_ORDER_ARGB,
},
{
.drm = DRM_FORMAT_XBGR8888, .hvs = HVS_PIXEL_FORMAT_RGBA8888,
.pixel_order = HVS_PIXEL_ORDER_ARGB,
},
{
.drm = DRM_FORMAT_RGB565, .hvs = HVS_PIXEL_FORMAT_RGB565,
.pixel_order = HVS_PIXEL_ORDER_XRGB,
},
{
.drm = DRM_FORMAT_BGR565, .hvs = HVS_PIXEL_FORMAT_RGB565,
.pixel_order = HVS_PIXEL_ORDER_XBGR,
},
{
.drm = DRM_FORMAT_ARGB1555, .hvs = HVS_PIXEL_FORMAT_RGBA5551,
.pixel_order = HVS_PIXEL_ORDER_ABGR,
},
{
.drm = DRM_FORMAT_XRGB1555, .hvs = HVS_PIXEL_FORMAT_RGBA5551,
.pixel_order = HVS_PIXEL_ORDER_ABGR,
},
{
.drm = DRM_FORMAT_RGB888, .hvs = HVS_PIXEL_FORMAT_RGB888,
.pixel_order = HVS_PIXEL_ORDER_XRGB,
},
{
.drm = DRM_FORMAT_BGR888, .hvs = HVS_PIXEL_FORMAT_RGB888,
.pixel_order = HVS_PIXEL_ORDER_XBGR,
},
{
.drm = DRM_FORMAT_YUV422,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_3PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
},
{
.drm = DRM_FORMAT_YVU422,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_3PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
},
{
.drm = DRM_FORMAT_YUV420,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
},
{
.drm = DRM_FORMAT_YVU420,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_3PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
},
{
.drm = DRM_FORMAT_NV12,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
},
{
.drm = DRM_FORMAT_NV21,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
},
{
.drm = DRM_FORMAT_NV16,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_2PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCBCR,
},
{
.drm = DRM_FORMAT_NV61,
.hvs = HVS_PIXEL_FORMAT_YCBCR_YUV422_2PLANE,
.pixel_order = HVS_PIXEL_ORDER_XYCRCB,
},
};
static const struct hvs_format *vc4_get_hvs_format(u32 drm_format)
{
unsigned i;
for (i = 0; i < ARRAY_SIZE(hvs_formats); i++) {
if (hvs_formats[i].drm == drm_format)
return &hvs_formats[i];
}
return NULL;
}
static enum vc4_scaling_mode vc4_get_scaling_mode(u32 src, u32 dst)
{
if (dst == src)
return VC4_SCALING_NONE;
if (3 * dst >= 2 * src)
return VC4_SCALING_PPF;
else
return