// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2019 BayLibre, SAS
* Author: Neil Armstrong <[email protected]>
*/
#include <linux/bitfield.h>
#include <drm/drm_print.h>
#include <drm/drm_fourcc.h>
#include "meson_drv.h"
#include "meson_registers.h"
#include "meson_viu.h"
#include "meson_rdma.h"
#include "meson_osd_afbcd.h"
/*
* DOC: Driver for the ARM FrameBuffer Compression Decoders
*
* The Amlogic GXM and G12A SoC families embeds an AFBC Decoder,
* to decode compressed buffers generated by the ARM Mali GPU.
*
* For the GXM Family, Amlogic designed their own Decoder, named in
* the vendor source as "MESON_AFBC", and a single decoder is available
* for the 2 OSD planes.
* This decoder is compatible with the AFBC 1.0 specifications and the
* Mali T820 GPU capabilities.
* It supports :
* - basic AFBC buffer for RGB32 only, thus YTR feature is mandatory
* - SPARSE layout and SPLIT layout
* - only 16x16 superblock
*
* The decoder reads the data from the SDRAM, decodes and sends the
* decoded pixel stream to the OSD1 Plane pixel composer.
*
* For the G12A Family, Amlogic integrated an ARM AFBC Decoder, named
* in the vendor source as "MALI_AFBC", and the decoder can decode up
* to 4 surfaces, one for each of the 4 available OSDs.
* This decoder is compatible with the AFBC 1.2 specifications for the
* Mali G31 and G52 GPUs.
* Is supports :
* - basic AFBC buffer for multiple RGB and YUV pixel formats
* - SPARSE layout and SPLIT layout
* - 16x16 and 32x8 "wideblk" superblocks
* - Tiled header
*
* The ARM AFBC Decoder independent from the VPU Pixel Pipeline, so
* the ARM AFBC Decoder reads the data from the SDRAM then decodes
* into a private internal physical address where the OSD1 Plane pixel
* composer unpacks the decoded data.
*/
/* Amlogic AFBC Decoder for GXM Family */
#define OSD1_AFBCD_RGB32 0x15
static int meson_gxm_afbcd_pixel_fmt(u64 modifier, uint32_t format)
{
switch (format) {
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_ABGR8888:
return OSD1_AFBCD_RGB32;
/* TOFIX support mode formats */
default:
DRM_DEBUG("unsupported afbc format[%08x]\n", format);
return -EINVAL;
}
}
static bool meson_gxm_afbcd_supported_fmt(u64 modifier, uint32_t format)
{
if (modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_32x8)
return false;
if (!(modifier & AFBC_FORMAT_MOD_YTR))
return false;
return meson_gxm_afbcd_pixel_fmt(modifier, format) >= 0;
}
static int meson_gxm_afbcd_reset(struct meson_drm *priv)
{
writel_relaxed(VIU_SW_RESET_OSD1_AFBCD,
priv->io_base + _REG(VIU_SW_RESET));
writel_relaxed(0, priv->io_base + _REG(VIU_SW_RESET));
return 0;
}
static int meson_gxm_afbcd_init(struct meson_drm *priv)
{
return 0;
}
static void meson_gxm_afbcd_exit(struct meson_drm *priv)
{
meson_gxm_afbcd_reset(priv);
}
static int meson_gxm_afbcd_enable(struct meson_drm *priv)
{
writel_relaxed(FIELD_PREP(OSD1_AFBCD_ID_FIFO_THRD, 0x40) |
OSD1_AFBCD_DEC_ENABLE,
priv->io_base + _REG(OSD1_AFBCD_ENABLE));
return 0;
}
static int meson_gxm_afbcd_disable(struct meson_drm *priv)
{
writel_bits_relaxed(OSD1_AFBCD_DEC_ENABLE, 0,
priv->io_base + _REG(OSD1_AFBCD_ENABLE));
return 0;
}
static int meson_gxm_afbcd_setup(struct meson_drm *priv)
{
u32 conv_lbuf_len;
u32 mode = FIELD_PREP(OSD1_AFBCD_MIF_URGENT, 3) |
FIELD_PREP(OSD1_AFBCD_HOLD_LINE_NUM, 4) |
FIELD_PREP(OSD1_AFBCD_RGBA_EXCHAN_CTRL, 0x34) |
meson_gxm_afbcd_pixel_fmt(priv->afbcd.modifier,
priv->afbcd.format);
if (priv->afbcd.modifier & AFBC_FORMAT_MOD_SPARSE)
mode |= OSD1_AFBCD_HREG_HALF_BLOCK;
if (priv->afbcd.modifier & AFBC_FORMAT_MOD_SPLIT)
mode |= OSD1_AFBCD_HREG_BLOCK_SPLIT;
writel_relaxed(mode, priv->io_base + _REG(OSD1_AFBCD_MODE));
writel_relaxed(FIELD_PREP(OSD1_AFBCD_HREG_VSIZE_IN,
priv->viu.osd1_width) |
FIELD_PREP(OSD1_AFBCD_HREG_HSIZE_IN,
priv->viu.osd1_height),
priv->io_base + _REG(OSD1_AFBCD_SIZE_IN));
writel_relaxed(priv->viu.osd1_addr >> 4,
priv->io_base + _REG(OSD1_AFBCD_HDR_PTR));
writel_relaxed(priv->viu.osd1_addr >> 4,
priv->io_base + _REG(OSD1_AFBCD_FRAME_PTR));
/* TOFIX: bits 31:24 are not documented, nor the meaning of 0xe4 */
writel_relaxed((0xe4 << 24) | (priv->viu.osd1_addr & 0xffffff),
priv->io_base + _REG(OSD1_AFBCD_CHROMA_PTR));
if (priv->viu.osd1_width <= 128)
conv_lbuf_len = 32;
else if (priv->viu.osd1_width <= 256)
conv_lbuf_len = 64;
else if (priv->viu.osd1_width <= 512)
conv_lbuf_len = 128;
else if (priv->viu.osd1_width <= 1024)
conv_lbuf_len = 256;
else if (priv->viu.osd1_width <= 2048)
conv_lbuf_len = 512;
else
conv_lbuf_len = 1024;
writel_relaxed(conv_lbuf_len,
priv->io_base + _REG(OSD1_AFBCD_CONV_CTRL));
writel_relaxed(FIELD_PREP(OSD1_AFBCD_DEC_PIXEL_BGN_H, 0) |
FIELD_PREP(OSD1_AFBCD_DEC_PIXEL_END_H,
priv->viu.osd1_width - 1),
priv->io_base + _REG(OSD1_AFBCD_PIXEL_HSCOPE));
writel_relaxed(FIELD_PREP(OSD1_AFBCD_DEC_PIXEL_BGN_V, 0) |
FIELD_PREP(OSD1_AFBCD_DEC_PIXEL_END_V,
priv->viu.osd1_height - 1),
priv->io_base + _REG(OSD1_AFBCD_PIXEL_VSCOPE));
return 0;
}
struct meson_afbcd_ops meson_afbcd_gxm_ops = {
.init = meson_gxm_afbcd_init,
.exit = meson_gxm_afbcd_exit,
.reset = meson_gxm_afbcd_reset,
.enable = meson_gxm_afbcd_enable,
.disable = meson_gxm_afbcd_disable,
.setup = meson_gxm_afbcd_setup,
.supported_fmt = meson_gxm_afbcd_supported_fmt,
};
/* ARM AFBC Decoder for G12A Family */
/* Amlogic G12A Mali AFBC Decoder supported formats */
enum {
MAFBC_FMT_RGB565 = 0,
MAFBC_FMT_RGBA5551,
MAFBC_FMT_RGBA1010102,
MAFBC_FMT_YUV420_10B,
MAFBC_FMT_RGB888,
MAFBC_FMT_RGBA8888,
MAFBC_FMT_RGBA4444,
MAFBC_FMT_R8,
MAFBC_FMT_RG88,
MAFBC_FMT_YUV420_8B,
MAFBC_FMT_YUV422_8B = 11,
MAFBC_FMT_YUV422_10B = 14,
};
static int meson_g12a_afbcd_pixel_fmt(u64 modifier, uint32_t format)
{
switch (format) {
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB8888:
/* YTR is forbidden for non XBGR formats */
if (modifier & AFBC_FORMAT_MOD_YTR)
return -EINVAL;
fallthrough;
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_ABGR8888:
return MAFBC_FMT_RGBA8888;
case DRM_FORMAT_RGB888:
/* YTR is forbidden for non XBGR formats */
if (modifier & AFBC_FORMAT_MOD_YTR)
return -EINVAL;
return MAFBC_FMT_RGB888;
case DRM_FORMAT_RGB565:
/* YTR is forbidden for non XBGR formats */
if (modifier & AFBC_FORMAT_MOD_YTR)
return -EINVAL;
return MAFBC_FMT_RGB565;
/* TOFIX support mode formats */
default:
DRM_DEBUG("unsupported afbc format[%08x]\n", format);
return -EINVAL;
}
}
static int meson_g12a_afbcd_bpp(uint32_t format)
{
switch (format) {
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB8888:
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_ABGR8888:
return 32;
case DRM_FORMAT_RGB888:
return 24;
case DRM_FORMAT_RGB565:
return 16;
/* TOFIX support mode formats */
default:
DRM_ERROR("unsupported afbc format[%08x]\n", format);
return 0;
}
}
static int meson_g12a_afbcd_fmt_to_blk_mode(u64 modifier, uint32_t format)
{
switch (format) {
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB8888:
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_ABGR8888:
return OSD_MALI_COLOR_MODE_RGBA8888;
case DRM_FORMAT_RGB888:
return OSD_MALI_COLOR_MODE_RGB888;
case DRM_FORMAT_RGB565:
return OSD_MALI_COLOR_MODE_RGB565;
/* TOFIX support mode formats */
default:
DRM_DEBUG("unsupported afbc format[%08x]\n", format);
return -EINVAL;
}
}
static bool meson_g12a_afbcd_supported_fmt(u64 modifier, uint32_t format)
{
return meson_g12a_afbcd_pixel_fmt(modifier, format) >= 0;
}
static int meson_g12a_afbcd_reset(struct meson_drm *priv)
{
meson_rdma_reset(priv);
meson_rdma_writel_sync(priv, VIU_SW_RESET_G12A_AFBC_ARB |
VIU_SW_RESET_G12A_OSD1_AFBCD,
VIU_SW_RESET);
meson_rdma_writel_sync(priv, 0, VIU_SW_RESET);
return 0;
}
static int meson_g12a_afbcd_init(struct meson_drm *priv)
{
int ret;
ret = meson_rdma_init(priv);
if (ret)
return ret;
meson_rdma_setup(priv);
/* Handle AFBC Decoder reset manually */
writel_bits_relaxed(MALI_AFBCD_MANUAL_RESET, MALI_AFBCD_MANUAL_RESET,
priv->io_base + _REG(MALI_AFBCD_TOP_CTRL));
return 0;
}
static void meson_g12a_afbcd_exit(struct meson_drm *priv)
{
meson_g12a_afbcd_reset(priv);
meson_rdma_free(priv);
}
static int meson_g12a_afbcd_enable(struct meson_drm *priv)
{
meson_rdma_writel_sync(priv, VPU_MAFBC_IRQ_SURFACES_COMPLETED |
VPU_MAFBC_IRQ_CONFIGURATION_SWAPPED |
VPU_MAFBC_IRQ_DECODE_ERROR |
VPU_MAFBC_IRQ_DETILING_ERROR,
VPU_MAFBC_IRQ_MASK);
meson_rdma_writel_sync(priv, VPU_MAFBC_S0_ENABLE,
VPU_MAFBC_SURFACE_CFG);
meson_rdma_writel_sync(priv, VPU_MAFBC_DIRECT_SWAP,
VPU_MAFBC_COMMAND);
/* This will enable the RDMA replaying the register writes on vsync */
meson_rdma_flush(priv);
return 0;
}
static int meson_g12a_afbcd_disable(struct meson_drm *priv)
{
writel_bits_relaxed(VPU_MAFBC_S0_ENABLE, 0,
priv->io_base + _REG(VPU_MAFBC_SURFACE_CFG));
return 0;
}
static int meson_g12a_afbcd_setup(struct meson_drm *priv)
{
u32 format = meson_g12a_afbcd_pixel_fmt(priv->afbcd.modifier,
priv->afbcd.format);
if (priv->afbcd.modifier & AFBC_FORMAT_MOD_YTR)
format |= VPU_MAFBC_YUV_TRANSFORM;
if (priv->afbcd.modifier & AFBC_FORMAT_MOD_SPLIT)
format |= VPU_MAFBC_BLOCK_SPLIT;
if (priv->afbcd.modifier & AFBC_FORMAT_MOD_TILED)
format |= VPU_MAFBC_TILED_HEADER_EN;
if ((priv->afbcd.modifier & AFBC_FORMAT_MOD_BLOCK_SIZE_MASK) ==
AFBC_FORMAT_MOD_BLOCK_SIZE_32x8)
format |= FIELD_PREP(VPU_MAFBC_SUPER_BLOCK_ASPECT, 1);
meson_rdma_writel_sync(priv, format,
VPU_MAFBC_FORMAT_SPECIFIER_S0);
meson_rdma_writel_sync(priv, priv->viu.osd1_addr,
VPU_MAFBC_HEADER_BUF_ADDR_LOW_S0);
meson_rdma_writel_sync(priv, 0,
VPU_MAFBC_HEADER_BUF_ADDR_HIGH_S0);
meson_rdma_writel_sync(priv, priv->viu.osd1_width,
VPU_MAFBC_BUFFER_WIDTH_S0);
meson_rdma_writel_sync(priv, ALIGN(priv->viu.osd1_height, 32),
VPU_MAFBC_BUFFER_HEIGHT_S0);
meson_rdma_writel_sync(priv, 0,
VPU_MAFBC_BOUNDING_BOX_X_START_S0);
meson_rdma_writel_sync(priv, priv->viu.osd1_width - 1,
VPU_MAFBC_BOUNDING_BOX_X_END_S0);
meson_rdma_writel_sync(priv, 0,
VPU_MAFBC_BOUNDING_BOX_Y_START_S0);
meson_rdma_writel_sync(priv, priv->viu.osd1_height - 1,
VPU_MAFBC_BOUNDING_BOX_Y_END_S0);
meson_rdma_writel_sync(priv, MESON_G12A_AFBCD_OUT_ADDR,
VPU_MAFBC_OUTPUT_BUF_ADDR_LOW_S0);
meson_rdma_writel_sync(priv, 0,
VPU_MAFBC_OUTPUT_BUF_ADDR_HIGH_S0);
meson_rdma_writel_sync(priv, priv->viu.osd1_width *
(meson_g12a_afbcd_bpp(priv->afbcd.format) / 8),
VPU_MAFBC_OUTPUT_BUF_STRIDE_S0);
return 0;
}
struct meson_afbcd_ops meson_afbcd_g12a_ops = {
.init = meson_g12a_afbcd_init,
.exit = meson_g12a_afbcd_exit,
.reset = meson_g12a_afbcd_reset,
.enable = meson_g12a_afbcd_enable,
.disable = meson_g12a_afbcd_disable,
.setup = meson_g12a_afbcd_setup,
.fmt_to_blk_mode = meson_g12a_afbcd_fmt_to_blk_mode,
.supported_fmt = meson_g12a_afbcd_supported_fmt,
};
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