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|
/*
* rcar_du_plane.c -- R-Car Display Unit Planes
*
* Copyright (C) 2013 Renesas Corporation
*
* Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <drm/drmP.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 "rcar_du_drv.h"
#include "rcar_du_kms.h"
#include "rcar_du_plane.h"
#include "rcar_du_regs.h"
#define RCAR_DU_COLORKEY_NONE (0 << 24)
#define RCAR_DU_COLORKEY_SOURCE (1 << 24)
#define RCAR_DU_COLORKEY_MASK (1 << 24)
struct rcar_du_kms_plane {
struct drm_plane plane;
struct rcar_du_plane *hwplane;
};
static inline struct rcar_du_plane *to_rcar_plane(struct drm_plane *plane)
{
return container_of(plane, struct rcar_du_kms_plane, plane)->hwplane;
}
static u32 rcar_du_plane_read(struct rcar_du_group *rgrp,
unsigned int index, u32 reg)
{
return rcar_du_read(rgrp->dev,
rgrp->mmio_offset + index * PLANE_OFF + reg);
}
static void rcar_du_plane_write(struct rcar_du_group *rgrp,
unsigned int index, u32 reg, u32 data)
{
rcar_du_write(rgrp->dev, rgrp->mmio_offset + index * PLANE_OFF + reg,
data);
}
int rcar_du_plane_reserve(struct rcar_du_plane *plane,
const struct rcar_du_format_info *format)
{
struct rcar_du_group *rgrp = plane->group;
unsigned int i;
int ret = -EBUSY;
mutex_lock(&rgrp->planes.lock);
for (i = 0; i < ARRAY_SIZE(rgrp->planes.planes); ++i) {
if (!(rgrp->planes.free & (1 << i)))
continue;
if (format->planes == 1 ||
rgrp->planes.free & (1 << ((i + 1) % 8)))
break;
}
if (i == ARRAY_SIZE(rgrp->planes.planes))
goto done;
rgrp->planes.free &= ~(1 << i);
if (format->planes == 2)
rgrp->planes.free &= ~(1 << ((i + 1) % 8));
plane->hwindex = i;
ret = 0;
done:
mutex_unlock(&rgrp->planes.lock);
return ret;
}
void rcar_du_plane_release(struct rcar_du_plane *plane)
{
struct rcar_du_group *rgrp = plane->group;
if (plane->hwindex == -1)
return;
mutex_lock(&rgrp->planes.lock);
rgrp->planes.free |= 1 << plane->hwindex;
if (plane->format->planes == 2)
rgrp->planes.free |= 1 << ((plane->hwindex + 1) % 8);
mutex_unlock(&rgrp->planes.lock);
plane->hwindex = -1;
}
void rcar_du_plane_update_base(struct rcar_du_plane *plane)
{
struct rcar_du_group *rgrp = plane->group;
unsigned int index = plane->hwindex;
/* The Y position is expressed in raster line units and must be doubled
* for 32bpp formats, according to the R8A7790 datasheet. No mention of
* doubling the Y position is found in the R8A7779 datasheet, but the
* rule seems to apply there as well.
*
* Similarly, for the second plane, NV12 and NV21 formats seem to
* require a halved Y position value.
*/
rcar_du_plane_write(rgrp, index, PnSPXR, plane->src_x);
rcar_du_plane_write(rgrp, index, PnSPYR, plane->src_y *
(plane->format->bpp == 32 ? 2 : 1));
rcar_du_plane_write(rgrp, index, PnDSA0R, plane->dma[0]);
if (plane->format->planes == 2) {
index = (index + 1) % 8;
rcar_du_plane_write(rgrp, index, PnSPXR, plane->src_x);
rcar_du_plane_write(rgrp, index, PnSPYR, plane->src_y *
(plane->format->bpp == 16 ? 2 : 1) / 2);
rcar_du_plane_write(rgrp, index, PnDSA0R, plane->dma[1]);
}
}
void rcar_du_plane_compute_base(struct rcar_du_plane *plane,
struct drm_framebuffer *fb)
{
struct drm_gem_cma_object *gem;
gem = drm_fb_cma_get_gem_obj(fb, 0);
plane->dma[0] = gem->paddr + fb->offsets[0];
if (plane->format->planes == 2) {
gem = drm_fb_cma_get_gem_obj(fb, 1);
plane->dma[1] = gem->paddr + fb->offsets[1];
}
}
static void rcar_du_plane_setup_mode(struct rcar_du_plane *plane,
unsigned int index)
{
struct rcar_du_group *rgrp = plane->group;
u32 colorkey;
u32 pnmr;
/* The PnALPHAR register controls alpha-blending in 16bpp formats
* (ARGB1555 and XRGB1555).
*
* For ARGB, set the alpha value to 0, and enable alpha-blending when
* the A bit is 0. This maps A=0 to alpha=0 and A=1 to alpha=255.
*
* For XRGB, set the alpha value to the plane-wide alpha value and
* enable alpha-blending regardless of the X bit value.
*/
if (plane->format->fourcc != DRM_FORMAT_XRGB1555)
rcar_du_plane_write(rgrp, index, PnALPHAR, PnALPHAR_ABIT_0);
else
rcar_du_plane_write(rgrp, index, PnALPHAR,
PnALPHAR_ABIT_X | plane->alpha);
pnmr = PnMR_BM_MD | plane->format->pnmr;
/* Disable color keying when requested. YUV formats have the
* PnMR_SPIM_TP_OFF bit set in their pnmr field, disabling color keying
* automatically.
*/
if ((plane->colorkey & RCAR_DU_COLORKEY_MASK) == RCAR_DU_COLORKEY_NONE)
pnmr |= PnMR_SPIM_TP_OFF;
/* For packed YUV formats we need to select the U/V order. */
if (plane->format->fourcc == DRM_FORMAT_YUYV)
pnmr |= PnMR_YCDF_YUYV;
rcar_du_plane_write(rgrp, index, PnMR, pnmr);
switch (plane->format->fourcc) {
case DRM_FORMAT_RGB565:
colorkey = ((plane->colorkey & 0xf80000) >> 8)
| ((plane->colorkey & 0x00fc00) >> 5)
| ((plane->colorkey & 0x0000f8) >> 3);
rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
break;
case DRM_FORMAT_ARGB1555:
case DRM_FORMAT_XRGB1555:
colorkey = ((plane->colorkey & 0xf80000) >> 9)
| ((plane->colorkey & 0x00f800) >> 6)
| ((plane->colorkey & 0x0000f8) >> 3);
rcar_du_plane_write(rgrp, index, PnTC2R, colorkey);
break;
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB8888:
rcar_du_plane_write(rgrp, index, PnTC3R,
PnTC3R_CODE | (plane->colorkey & 0xffffff));
break;
}
}
static void __rcar_du_plane_setup(struct rcar_du_plane *plane,
unsigned int index)
{
struct rcar_du_group *rgrp = plane->group;
u32 ddcr2 = PnDDCR2_CODE;
u32 ddcr4;
u32 mwr;
/* Data format
*
* The data format is selected by the DDDF field in PnMR and the EDF
* field in DDCR4.
*/
|