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/*
* Copyright (C) 2016 BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
* Copyright (C) 2015 Amlogic, Inc. All rights reserved.
* Copyright (C) 2014 Endless Mobile
*
* 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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <drm/drmP.h>
#include "meson_drv.h"
#include "meson_vpp.h"
#include "meson_registers.h"
/**
* DOC: Video Post Processing
*
* VPP Handles all the Post Processing after the Scanout from the VIU
* We handle the following post processings :
*
* - Postblend, Blends the OSD1 only
* We exclude OSD2, VS1, VS1 and Preblend output
* - Vertical OSD Scaler for OSD1 only, we disable vertical scaler and
* use it only for interlace scanout
* - Intermediate FIFO with default Amlogic values
*
* What is missing :
*
* - Preblend for video overlay pre-scaling
* - OSD2 support for cursor framebuffer
* - Video pre-scaling before postblend
* - Full Vertical/Horizontal OSD scaling to support TV overscan
* - HDR conversion
*/
void meson_vpp_setup_mux(struct meson_drm *priv, unsigned int mux)
{
writel(mux, priv->io_base + _REG(VPU_VIU_VENC_MUX_CTRL));
}
static unsigned int vpp_filter_coefs_4point_bspline[] = {
0x15561500, 0x14561600, 0x13561700, 0x12561800,
0x11551a00, 0x11541b00, 0x10541c00, 0x0f541d00,
0x0f531e00, 0x0e531f00, 0x0d522100, 0x0c522200,
0x0b522300, 0x0b512400, 0x0a502600, 0x0a4f2700,
0x094e2900, 0x084e2a00, 0x084d2b00, 0x074c2c01,
0x074b2d01, 0x064a2f01, 0x06493001, 0x05483201,
0x05473301, 0x05463401, 0x04453601, 0x04433702,
0x04423802, 0x03413a02, 0x03403b02, 0x033f3c02,
0x033d3d03
};
static void meson_vpp_write_scaling_filter_coefs(struct meson_drm *priv,
const unsigned int *coefs,
bool is_horizontal)
{
int i;
writel_relaxed(is_horizontal ? BIT(8) : 0,
priv->io_base + _REG(VPP_OSD_SCALE_COEF_IDX));
for (i = 0; i < 33; i++)
writel_relaxed(coefs[i],
priv->io_base + _REG(VPP_OSD_SCALE_COEF));
}
static const uint32_t vpp_filter_coefs_bicubic[] = {
0x00800000, 0x007f0100, 0xff7f0200, 0xfe7f0300,
0xfd7e0500, 0xfc7e0600, 0xfb7d0800, 0xfb7c0900,
0xfa7b0b00, 0xfa7a0dff, 0xf9790fff, 0xf97711ff,
0xf87613ff, 0xf87416fe, 0xf87218fe, 0xf8701afe,
0xf76f1dfd, 0xf76d1ffd, 0xf76b21fd, 0xf76824fd,
0xf76627fc, 0xf76429fc, 0xf7612cfc, 0xf75f2ffb,
0xf75d31fb, 0xf75a34fb, 0xf75837fa, 0xf7553afa,
0xf8523cfa, 0xf8503ff9, 0xf84d42f9, 0xf84a45f9,
0xf84848f8
};
static void meson_vpp_write_vd_scaling_filter_coefs(struct meson_drm *priv,
const unsigned int *coefs,
bool is_horizontal)
{
int i;
writel_relaxed(is_horizontal ? BIT(8) : 0,
priv->io_base + _REG(VPP_SCALE_COEF_IDX));
for (i = 0; i < 33; i++)
writel_relaxed(coefs[i],
priv->io_base + _REG(VPP_SCALE_COEF));
}
void meson_vpp_init(struct meson_drm *priv)
{
/* set dummy data default YUV black */
if (meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
writel_relaxed(0x108080, priv->io_base + _REG(VPP_DUMMY_DATA1));
else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu")) {
writel_bits_relaxed(0xff << 16, 0xff << 16,
priv->io_base + _REG(VIU_MISC_CTRL1));
writel_relaxed(0x20000, priv->io_base + _REG(VPP_DOLBY_CTRL));
writel_relaxed(0x1020080,
priv->io_base + _REG(VPP_DUMMY_DATA1));
}
/* Initialize vpu fifo control registers */
writel_relaxed(readl_relaxed(priv->io_base + _REG(VPP_OFIFO_SIZE)) |
0x77f, priv->io_base + _REG(VPP_OFIFO_SIZE));
writel_relaxed(0x08080808, priv->io_base + _REG(VPP_HOLD_LINES));
/* Turn off preblend */
writel_bits_relaxed(VPP_PREBLEND_ENABLE, 0,
priv->io_base + _REG(VPP_MISC));
/* Turn off POSTBLEND */
writel_bits_relaxed(VPP_POSTBLEND_ENABLE, 0,
priv->io_base + _REG(VPP_MISC));
/* Force all planes off */
writel_bits_relaxed(VPP_OSD1_POSTBLEND | VPP_OSD2_POSTBLEND |
VPP_VD1_POSTBLEND | VPP_VD2_POSTBLEND |
VPP_VD1_PREBLEND | VPP_VD2_PREBLEND, 0,
priv->io_base + _REG(VPP_MISC));
/* Setup default VD settings */
writel_relaxed(4096,
priv->io_base + _REG(VPP_PREBLEND_VD1_H_START_END));
writel_relaxed(4096,
priv->io_base + _REG(VPP_BLEND_VD2_H_START_END));
/* Disable Scalers */
writel_relaxed(0, priv->io_base + _REG(VPP_OSD_SC_CTRL0));
writel_relaxed(0, priv->io_base + _REG(VPP_OSD_VSC_CTRL0));
writel_relaxed(0, priv->io_base + _REG(VPP_OSD_HSC_CTRL0));
writel_relaxed(4 | (4 << 8) | BIT(15),
priv->io_base + _REG(VPP_SC_MISC));
writel_relaxed(1, priv->io_base + _REG(VPP_VADJ_CTRL));
/* Write in the proper filter coefficients. */
meson_vpp_write_scaling_filter_coefs(priv,
vpp_filter_coefs_4point_bspline, false);
meson_vpp_write_scaling_filter_coefs(priv,
vpp_filter_coefs_4point_bspline, true);
/* Write the VD proper filter coefficients. */
meson_vpp_write_vd_scaling_filter_coefs(priv, vpp_filter_coefs_bicubic,
false);
meson_vpp_write_vd_scaling_filter_coefs(priv, vpp_filter_coefs_bicubic,
true);
}
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