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linuxdebug/drivers/gpu/drm/xlnx/zynqmp_disp.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
/*
* ZynqMP Display Controller Driver
*
* Copyright (C) 2017 - 2020 Xilinx, Inc.
*
* Authors:
* - Hyun Woo Kwon <hyun.kwon@xilinx.com>
* - Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*/
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_atomic_uapi.h>
#include <drm/drm_blend.h>
#include <drm/drm_crtc.h>
#include <drm/drm_device.h>
#include <drm/drm_fb_dma_helper.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
#include <drm/drm_managed.h>
#include <drm/drm_plane.h>
#include <drm/drm_vblank.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/dma/xilinx_dpdma.h>
#include <linux/dma-mapping.h>
#include <linux/dmaengine.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/spinlock.h>
#include "zynqmp_disp.h"
#include "zynqmp_disp_regs.h"
#include "zynqmp_dp.h"
#include "zynqmp_dpsub.h"
/*
* Overview
* --------
*
* The display controller part of ZynqMP DP subsystem, made of the Audio/Video
* Buffer Manager, the Video Rendering Pipeline (blender) and the Audio Mixer.
*
* +------------------------------------------------------------+
* +--------+ | +----------------+ +-----------+ |
* | DPDMA | --->| | --> | Video | Video +-------------+ |
* | 4x vid | | | | | Rendering | -+--> | | | +------+
* | 2x aud | | | Audio/Video | --> | Pipeline | | | DisplayPort |---> | PHY0 |
* +--------+ | | Buffer Manager | +-----------+ | | Source | | +------+
* | | and STC | +-----------+ | | Controller | | +------+
* Live Video --->| | --> | Audio | Audio | |---> | PHY1 |
* | | | | Mixer | --+-> | | | +------+
* Live Audio --->| | --> | | || +-------------+ |
* | +----------------+ +-----------+ || |
* +---------------------------------------||-------------------+
* vv
* Blended Video and
* Mixed Audio to PL
*
* Only non-live input from the DPDMA and output to the DisplayPort Source
* Controller are currently supported. Interface with the programmable logic
* for live streams is not implemented.
*
* The display controller code creates planes for the DPDMA video and graphics
* layers, and a CRTC for the Video Rendering Pipeline.
*/
#define ZYNQMP_DISP_AV_BUF_NUM_VID_GFX_BUFFERS 4
#define ZYNQMP_DISP_AV_BUF_NUM_BUFFERS 6
#define ZYNQMP_DISP_NUM_LAYERS 2
#define ZYNQMP_DISP_MAX_NUM_SUB_PLANES 3
/**
* struct zynqmp_disp_format - Display subsystem format information
* @drm_fmt: DRM format (4CC)
* @buf_fmt: AV buffer format
* @bus_fmt: Media bus formats (live formats)
* @swap: Flag to swap R & B for RGB formats, and U & V for YUV formats
* @sf: Scaling factors for color components
*/
struct zynqmp_disp_format {
u32 drm_fmt;
u32 buf_fmt;
u32 bus_fmt;
bool swap;
const u32 *sf;
};
/**
* enum zynqmp_disp_layer_id - Layer identifier
* @ZYNQMP_DISP_LAYER_VID: Video layer
* @ZYNQMP_DISP_LAYER_GFX: Graphics layer
*/
enum zynqmp_disp_layer_id {
ZYNQMP_DISP_LAYER_VID,
ZYNQMP_DISP_LAYER_GFX
};
/**
* enum zynqmp_disp_layer_mode - Layer mode
* @ZYNQMP_DISP_LAYER_NONLIVE: non-live (memory) mode
* @ZYNQMP_DISP_LAYER_LIVE: live (stream) mode
*/
enum zynqmp_disp_layer_mode {
ZYNQMP_DISP_LAYER_NONLIVE,
ZYNQMP_DISP_LAYER_LIVE
};
/**
* struct zynqmp_disp_layer_dma - DMA channel for one data plane of a layer
* @chan: DMA channel
* @xt: Interleaved DMA descriptor template
* @sgl: Data chunk for dma_interleaved_template
*/
struct zynqmp_disp_layer_dma {
struct dma_chan *chan;
struct dma_interleaved_template xt;
struct data_chunk sgl;
};
/**
* struct zynqmp_disp_layer_info - Static layer information
* @formats: Array of supported formats
* @num_formats: Number of formats in @formats array
* @num_channels: Number of DMA channels
*/
struct zynqmp_disp_layer_info {
const struct zynqmp_disp_format *formats;
unsigned int num_formats;
unsigned int num_channels;
};
/**
* struct zynqmp_disp_layer - Display layer (DRM plane)
* @plane: DRM plane
* @id: Layer ID
* @disp: Back pointer to struct zynqmp_disp
* @info: Static layer information
* @dmas: DMA channels
* @disp_fmt: Current format information
* @drm_fmt: Current DRM format information
* @mode: Current operation mode
*/
struct zynqmp_disp_layer {
struct drm_plane plane;
enum zynqmp_disp_layer_id id;
struct zynqmp_disp *disp;
const struct zynqmp_disp_layer_info *info;
struct zynqmp_disp_layer_dma dmas[ZYNQMP_DISP_MAX_NUM_SUB_PLANES];
const struct zynqmp_disp_format *disp_fmt;
const struct drm_format_info *drm_fmt;
enum zynqmp_disp_layer_mode mode;
};
/**
* struct zynqmp_disp - Display controller
* @dev: Device structure
* @drm: DRM core
* @dpsub: Display subsystem
* @crtc: DRM CRTC
* @blend.base: Register I/O base address for the blender
* @avbuf.base: Register I/O base address for the audio/video buffer manager
* @audio.base: Registers I/O base address for the audio mixer
* @audio.clk: Audio clock
* @audio.clk_from_ps: True of the audio clock comes from PS, false from PL
* @layers: Layers (planes)
* @event: Pending vblank event request
* @pclk: Pixel clock
* @pclk_from_ps: True of the video clock comes from PS, false from PL
*/
struct zynqmp_disp {
struct device *dev;
struct drm_device *drm;
struct zynqmp_dpsub *dpsub;
struct drm_crtc crtc;
struct {
void __iomem *base;
} blend;
struct {
void __iomem *base;
} avbuf;
struct {
void __iomem *base;
struct clk *clk;
bool clk_from_ps;
} audio;
struct zynqmp_disp_layer layers[ZYNQMP_DISP_NUM_LAYERS];
struct drm_pending_vblank_event *event;
struct clk *pclk;
bool pclk_from_ps;
};
/* -----------------------------------------------------------------------------
* Audio/Video Buffer Manager
*/
static const u32 scaling_factors_444[] = {
ZYNQMP_DISP_AV_BUF_4BIT_SF,
ZYNQMP_DISP_AV_BUF_4BIT_SF,
ZYNQMP_DISP_AV_BUF_4BIT_SF,
};
static const u32 scaling_factors_555[] = {
ZYNQMP_DISP_AV_BUF_5BIT_SF,
ZYNQMP_DISP_AV_BUF_5BIT_SF,
ZYNQMP_DISP_AV_BUF_5BIT_SF,
};
static const u32 scaling_factors_565[] = {
ZYNQMP_DISP_AV_BUF_5BIT_SF,
ZYNQMP_DISP_AV_BUF_6BIT_SF,
ZYNQMP_DISP_AV_BUF_5BIT_SF,
};
static const u32 scaling_factors_888[] = {
ZYNQMP_DISP_AV_BUF_8BIT_SF,
ZYNQMP_DISP_AV_BUF_8BIT_SF,
ZYNQMP_DISP_AV_BUF_8BIT_SF,
};
static const u32 scaling_factors_101010[] = {
ZYNQMP_DISP_AV_BUF_10BIT_SF,
ZYNQMP_DISP_AV_BUF_10BIT_SF,
ZYNQMP_DISP_AV_BUF_10BIT_SF,
};
/* List of video layer formats */
static const struct zynqmp_disp_format avbuf_vid_fmts[] = {
{
.drm_fmt = DRM_FORMAT_VYUY,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_VYUY,
.swap = true,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_UYVY,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_VYUY,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_YUYV,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YUYV,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_YVYU,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YUYV,
.swap = true,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_YUV422,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_YVU422,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16,
.swap = true,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_YUV444,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV24,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_YVU444,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV24,
.swap = true,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_NV16,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_NV61,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI,
.swap = true,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_BGR888,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_RGB888,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888,
.swap = true,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_XBGR8888,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGBA8880,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_XRGB8888,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGBA8880,
.swap = true,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_XBGR2101010,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888_10,
.swap = false,
.sf = scaling_factors_101010,
}, {
.drm_fmt = DRM_FORMAT_XRGB2101010,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_RGB888_10,
.swap = true,
.sf = scaling_factors_101010,
}, {
.drm_fmt = DRM_FORMAT_YUV420,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16_420,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_YVU420,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16_420,
.swap = true,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_NV12,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI_420,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_NV21,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_VID_YV16CI_420,
.swap = true,
.sf = scaling_factors_888,
},
};
/* List of graphics layer formats */
static const struct zynqmp_disp_format avbuf_gfx_fmts[] = {
{
.drm_fmt = DRM_FORMAT_ABGR8888,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA8888,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_ARGB8888,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA8888,
.swap = true,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_RGBA8888,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_ABGR8888,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_BGRA8888,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_ABGR8888,
.swap = true,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_BGR888,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGB888,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_RGB888,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_BGR888,
.swap = false,
.sf = scaling_factors_888,
}, {
.drm_fmt = DRM_FORMAT_RGBA5551,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA5551,
.swap = false,
.sf = scaling_factors_555,
}, {
.drm_fmt = DRM_FORMAT_BGRA5551,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA5551,
.swap = true,
.sf = scaling_factors_555,
}, {
.drm_fmt = DRM_FORMAT_RGBA4444,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA4444,
.swap = false,
.sf = scaling_factors_444,
}, {
.drm_fmt = DRM_FORMAT_BGRA4444,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGBA4444,
.swap = true,
.sf = scaling_factors_444,
}, {
.drm_fmt = DRM_FORMAT_RGB565,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGB565,
.swap = false,
.sf = scaling_factors_565,
}, {
.drm_fmt = DRM_FORMAT_BGR565,
.buf_fmt = ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_RGB565,
.swap = true,
.sf = scaling_factors_565,
},
};
static u32 zynqmp_disp_avbuf_read(struct zynqmp_disp *disp, int reg)
{
return readl(disp->avbuf.base + reg);
}
static void zynqmp_disp_avbuf_write(struct zynqmp_disp *disp, int reg, u32 val)
{
writel(val, disp->avbuf.base + reg);
}
static bool zynqmp_disp_layer_is_gfx(const struct zynqmp_disp_layer *layer)
{
return layer->id == ZYNQMP_DISP_LAYER_GFX;
}
static bool zynqmp_disp_layer_is_video(const struct zynqmp_disp_layer *layer)
{
return layer->id == ZYNQMP_DISP_LAYER_VID;
}
/**
* zynqmp_disp_avbuf_set_format - Set the input format for a layer
* @disp: Display controller
* @layer: The layer
* @fmt: The format information
*
* Set the video buffer manager format for @layer to @fmt.
*/
static void zynqmp_disp_avbuf_set_format(struct zynqmp_disp *disp,
struct zynqmp_disp_layer *layer,
const struct zynqmp_disp_format *fmt)
{
unsigned int i;
u32 val;
val = zynqmp_disp_avbuf_read(disp, ZYNQMP_DISP_AV_BUF_FMT);
val &= zynqmp_disp_layer_is_video(layer)
? ~ZYNQMP_DISP_AV_BUF_FMT_NL_VID_MASK
: ~ZYNQMP_DISP_AV_BUF_FMT_NL_GFX_MASK;
val |= fmt->buf_fmt;
zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_FMT, val);
for (i = 0; i < ZYNQMP_DISP_AV_BUF_NUM_SF; i++) {
unsigned int reg = zynqmp_disp_layer_is_video(layer)
? ZYNQMP_DISP_AV_BUF_VID_COMP_SF(i)
: ZYNQMP_DISP_AV_BUF_GFX_COMP_SF(i);
zynqmp_disp_avbuf_write(disp, reg, fmt->sf[i]);
}
}
/**
* zynqmp_disp_avbuf_set_clocks_sources - Set the clocks sources
* @disp: Display controller
* @video_from_ps: True if the video clock originates from the PS
* @audio_from_ps: True if the audio clock originates from the PS
* @timings_internal: True if video timings are generated internally
*
* Set the source for the video and audio clocks, as well as for the video
* timings. Clocks can originate from the PS or PL, and timings can be
* generated internally or externally.
*/
static void
zynqmp_disp_avbuf_set_clocks_sources(struct zynqmp_disp *disp,
bool video_from_ps, bool audio_from_ps,
bool timings_internal)
{
u32 val = 0;
if (video_from_ps)
val |= ZYNQMP_DISP_AV_BUF_CLK_SRC_VID_FROM_PS;
if (audio_from_ps)
val |= ZYNQMP_DISP_AV_BUF_CLK_SRC_AUD_FROM_PS;
if (timings_internal)
val |= ZYNQMP_DISP_AV_BUF_CLK_SRC_VID_INTERNAL_TIMING;
zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_CLK_SRC, val);
}
/**
* zynqmp_disp_avbuf_enable_channels - Enable buffer channels
* @disp: Display controller
*
* Enable all (video and audio) buffer channels.
*/
static void zynqmp_disp_avbuf_enable_channels(struct zynqmp_disp *disp)
{
unsigned int i;
u32 val;
val = ZYNQMP_DISP_AV_BUF_CHBUF_EN |
(ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_MAX <<
ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_SHIFT);
for (i = 0; i < ZYNQMP_DISP_AV_BUF_NUM_VID_GFX_BUFFERS; i++)
zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_CHBUF(i),
val);
val = ZYNQMP_DISP_AV_BUF_CHBUF_EN |
(ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_AUD_MAX <<
ZYNQMP_DISP_AV_BUF_CHBUF_BURST_LEN_SHIFT);
for (; i < ZYNQMP_DISP_AV_BUF_NUM_BUFFERS; i++)
zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_CHBUF(i),
val);
}
/**
* zynqmp_disp_avbuf_disable_channels - Disable buffer channels
* @disp: Display controller
*
* Disable all (video and audio) buffer channels.
*/
static void zynqmp_disp_avbuf_disable_channels(struct zynqmp_disp *disp)
{
unsigned int i;
for (i = 0; i < ZYNQMP_DISP_AV_BUF_NUM_BUFFERS; i++)
zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_CHBUF(i),
ZYNQMP_DISP_AV_BUF_CHBUF_FLUSH);
}
/**
* zynqmp_disp_avbuf_enable_audio - Enable audio
* @disp: Display controller
*
* Enable all audio buffers with a non-live (memory) source.
*/
static void zynqmp_disp_avbuf_enable_audio(struct zynqmp_disp *disp)
{
u32 val;
val = zynqmp_disp_avbuf_read(disp, ZYNQMP_DISP_AV_BUF_OUTPUT);
val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MASK;
val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MEM;
val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_EN;
zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
}
/**
* zynqmp_disp_avbuf_disable_audio - Disable audio
* @disp: Display controller
*
* Disable all audio buffers.
*/
static void zynqmp_disp_avbuf_disable_audio(struct zynqmp_disp *disp)
{
u32 val;
val = zynqmp_disp_avbuf_read(disp, ZYNQMP_DISP_AV_BUF_OUTPUT);
val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_MASK;
val |= ZYNQMP_DISP_AV_BUF_OUTPUT_AUD1_DISABLE;
val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_AUD2_EN;
zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
}
/**
* zynqmp_disp_avbuf_enable_video - Enable a video layer
* @disp: Display controller
* @layer: The layer
* @mode: Operating mode of layer
*
* Enable the video/graphics buffer for @layer.
*/
static void zynqmp_disp_avbuf_enable_video(struct zynqmp_disp *disp,
struct zynqmp_disp_layer *layer,
enum zynqmp_disp_layer_mode mode)
{
u32 val;
val = zynqmp_disp_avbuf_read(disp, ZYNQMP_DISP_AV_BUF_OUTPUT);
if (zynqmp_disp_layer_is_video(layer)) {
val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MASK;
if (mode == ZYNQMP_DISP_LAYER_NONLIVE)
val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MEM;
else
val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_LIVE;
} else {
val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MASK;
val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MEM;
if (mode == ZYNQMP_DISP_LAYER_NONLIVE)
val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MEM;
else
val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_LIVE;
}
zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
}
/**
* zynqmp_disp_avbuf_disable_video - Disable a video layer
* @disp: Display controller
* @layer: The layer
*
* Disable the video/graphics buffer for @layer.
*/
static void zynqmp_disp_avbuf_disable_video(struct zynqmp_disp *disp,
struct zynqmp_disp_layer *layer)
{
u32 val;
val = zynqmp_disp_avbuf_read(disp, ZYNQMP_DISP_AV_BUF_OUTPUT);
if (zynqmp_disp_layer_is_video(layer)) {
val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_MASK;
val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID1_NONE;
} else {
val &= ~ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_MASK;
val |= ZYNQMP_DISP_AV_BUF_OUTPUT_VID2_DISABLE;
}
zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_OUTPUT, val);
}
/**
* zynqmp_disp_avbuf_enable - Enable the video pipe
* @disp: Display controller
*
* De-assert the video pipe reset.
*/
static void zynqmp_disp_avbuf_enable(struct zynqmp_disp *disp)
{
zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_SRST_REG, 0);
}
/**
* zynqmp_disp_avbuf_disable - Disable the video pipe
* @disp: Display controller
*
* Assert the video pipe reset.
*/
static void zynqmp_disp_avbuf_disable(struct zynqmp_disp *disp)
{
zynqmp_disp_avbuf_write(disp, ZYNQMP_DISP_AV_BUF_SRST_REG,
ZYNQMP_DISP_AV_BUF_SRST_REG_VID_RST);
}
/* -----------------------------------------------------------------------------
* Blender (Video Pipeline)
*/
static void zynqmp_disp_blend_write(struct zynqmp_disp *disp, int reg, u32 val)
{
writel(val, disp->blend.base + reg);
}
/*
* Colorspace conversion matrices.
*
* Hardcode RGB <-> YUV conversion to full-range SDTV for now.
*/
static const u16 csc_zero_matrix[] = {
0x0, 0x0, 0x0,
0x0, 0x0, 0x0,
0x0, 0x0, 0x0
};
static const u16 csc_identity_matrix[] = {
0x1000, 0x0, 0x0,
0x0, 0x1000, 0x0,
0x0, 0x0, 0x1000
};
static const u32 csc_zero_offsets[] = {
0, 0, 0
};
static const u16 csc_rgb_to_sdtv_matrix[] = {
0x4c9, 0x864, 0x1d3,
0x7d4d, 0x7ab3, 0x800,
0x800, 0x794d, 0x7eb3
};
static const u32 csc_rgb_to_sdtv_offsets[] = {
0x0, 0x8000000, 0x8000000
};
static const u16 csc_sdtv_to_rgb_matrix[] = {
0x1000, 0x166f, 0x0,
0x1000, 0x7483, 0x7a7f,
0x1000, 0x0, 0x1c5a
};
static const u32 csc_sdtv_to_rgb_offsets[] = {
0x0, 0x1800, 0x1800
};
/**
* zynqmp_disp_blend_set_output_format - Set the output format of the blender
* @disp: Display controller
* @format: Output format
*
* Set the output format of the blender to @format.
*/
static void zynqmp_disp_blend_set_output_format(struct zynqmp_disp *disp,
enum zynqmp_dpsub_format format)
{
static const unsigned int blend_output_fmts[] = {
[ZYNQMP_DPSUB_FORMAT_RGB] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_RGB,
[ZYNQMP_DPSUB_FORMAT_YCRCB444] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YCBCR444,
[ZYNQMP_DPSUB_FORMAT_YCRCB422] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YCBCR422
| ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_EN_DOWNSAMPLE,
[ZYNQMP_DPSUB_FORMAT_YONLY] = ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_YONLY,
};
u32 fmt = blend_output_fmts[format];
const u16 *coeffs;
const u32 *offsets;
unsigned int i;
zynqmp_disp_blend_write(disp, ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT, fmt);
if (fmt == ZYNQMP_DISP_V_BLEND_OUTPUT_VID_FMT_RGB) {
coeffs = csc_identity_matrix;
offsets = csc_zero_offsets;
} else {
coeffs = csc_rgb_to_sdtv_matrix;
offsets = csc_rgb_to_sdtv_offsets;
}
for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_COEFF; i++)
zynqmp_disp_blend_write(disp,
ZYNQMP_DISP_V_BLEND_RGB2YCBCR_COEFF(i),
coeffs[i]);
for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_OFFSET; i++)
zynqmp_disp_blend_write(disp,
ZYNQMP_DISP_V_BLEND_OUTCSC_OFFSET(i),
offsets[i]);
}
/**
* zynqmp_disp_blend_set_bg_color - Set the background color
* @disp: Display controller
* @rcr: Red/Cr color component
* @gy: Green/Y color component
* @bcb: Blue/Cb color component
*
* Set the background color to (@rcr, @gy, @bcb), corresponding to the R, G and
* B or Cr, Y and Cb components respectively depending on the selected output
* format.
*/
static void zynqmp_disp_blend_set_bg_color(struct zynqmp_disp *disp,
u32 rcr, u32 gy, u32 bcb)
{
zynqmp_disp_blend_write(disp, ZYNQMP_DISP_V_BLEND_BG_CLR_0, rcr);
zynqmp_disp_blend_write(disp, ZYNQMP_DISP_V_BLEND_BG_CLR_1, gy);
zynqmp_disp_blend_write(disp, ZYNQMP_DISP_V_BLEND_BG_CLR_2, bcb);
}
/**
* zynqmp_disp_blend_set_global_alpha - Configure global alpha blending
* @disp: Display controller
* @enable: True to enable global alpha blending
* @alpha: Global alpha value (ignored if @enabled is false)
*/
static void zynqmp_disp_blend_set_global_alpha(struct zynqmp_disp *disp,
bool enable, u32 alpha)
{
zynqmp_disp_blend_write(disp, ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA,
ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA_VALUE(alpha) |
(enable ? ZYNQMP_DISP_V_BLEND_SET_GLOBAL_ALPHA_EN : 0));
}
/**
* zynqmp_disp_blend_layer_set_csc - Configure colorspace conversion for layer
* @disp: Display controller
* @layer: The layer
* @coeffs: Colorspace conversion matrix
* @offsets: Colorspace conversion offsets
*
* Configure the input colorspace conversion matrix and offsets for the @layer.
* Columns of the matrix are automatically swapped based on the input format to
* handle RGB and YCrCb components permutations.
*/
static void zynqmp_disp_blend_layer_set_csc(struct zynqmp_disp *disp,
struct zynqmp_disp_layer *layer,
const u16 *coeffs,
const u32 *offsets)
{
unsigned int swap[3] = { 0, 1, 2 };
unsigned int reg;
unsigned int i;
if (layer->disp_fmt->swap) {
if (layer->drm_fmt->is_yuv) {
/* Swap U and V. */
swap[1] = 2;
swap[2] = 1;
} else {
/* Swap R and B. */
swap[0] = 2;
swap[2] = 0;
}
}
if (zynqmp_disp_layer_is_video(layer))
reg = ZYNQMP_DISP_V_BLEND_IN1CSC_COEFF(0);
else
reg = ZYNQMP_DISP_V_BLEND_IN2CSC_COEFF(0);
for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_COEFF; i += 3, reg += 12) {
zynqmp_disp_blend_write(disp, reg + 0, coeffs[i + swap[0]]);
zynqmp_disp_blend_write(disp, reg + 4, coeffs[i + swap[1]]);
zynqmp_disp_blend_write(disp, reg + 8, coeffs[i + swap[2]]);
}
if (zynqmp_disp_layer_is_video(layer))
reg = ZYNQMP_DISP_V_BLEND_IN1CSC_OFFSET(0);
else
reg = ZYNQMP_DISP_V_BLEND_IN2CSC_OFFSET(0);
for (i = 0; i < ZYNQMP_DISP_V_BLEND_NUM_OFFSET; i++)
zynqmp_disp_blend_write(disp, reg + i * 4, offsets[i]);
}
/**
* zynqmp_disp_blend_layer_enable - Enable a layer
* @disp: Display controller
* @layer: The layer
*/
static void zynqmp_disp_blend_layer_enable(struct zynqmp_disp *disp,
struct zynqmp_disp_layer *layer)
{
const u16 *coeffs;
const u32 *offsets;
u32 val;
val = (layer->drm_fmt->is_yuv ?
0 : ZYNQMP_DISP_V_BLEND_LAYER_CONTROL_RGB) |
(layer->drm_fmt->hsub > 1 ?
ZYNQMP_DISP_V_BLEND_LAYER_CONTROL_EN_US : 0);
zynqmp_disp_blend_write(disp,
ZYNQMP_DISP_V_BLEND_LAYER_CONTROL(layer->id),
val);
if (layer->drm_fmt->is_yuv) {
coeffs = csc_sdtv_to_rgb_matrix;
offsets = csc_sdtv_to_rgb_offsets;
} else {
coeffs = csc_identity_matrix;
offsets = csc_zero_offsets;
}
zynqmp_disp_blend_layer_set_csc(disp, layer, coeffs, offsets);
}
/**
* zynqmp_disp_blend_layer_disable - Disable a layer
* @disp: Display controller
* @layer: The layer
*/
static void zynqmp_disp_blend_layer_disable(struct zynqmp_disp *disp,
struct zynqmp_disp_layer *layer)
{
zynqmp_disp_blend_write(disp,
ZYNQMP_DISP_V_BLEND_LAYER_CONTROL(layer->id),
0);
zynqmp_disp_blend_layer_set_csc(disp, layer, csc_zero_matrix,
csc_zero_offsets);
}
/* -----------------------------------------------------------------------------
* Audio Mixer
*/
static void zynqmp_disp_audio_write(struct zynqmp_disp *disp, int reg, u32 val)
{
writel(val, disp->audio.base + reg);
}
/**
* zynqmp_disp_audio_enable - Enable the audio mixer
* @disp: Display controller
*
* Enable the audio mixer by de-asserting the soft reset. The audio state is set to
* default values by the reset, set the default mixer volume explicitly.
*/
static void zynqmp_disp_audio_enable(struct zynqmp_disp *disp)
{
/* Clear the audio soft reset register as it's an non-reset flop. */
zynqmp_disp_audio_write(disp, ZYNQMP_DISP_AUD_SOFT_RESET, 0);
zynqmp_disp_audio_write(disp, ZYNQMP_DISP_AUD_MIXER_VOLUME,
ZYNQMP_DISP_AUD_MIXER_VOLUME_NO_SCALE);
}
/**
* zynqmp_disp_audio_disable - Disable the audio mixer
* @disp: Display controller
*
* Disable the audio mixer by asserting its soft reset.
*/
static void zynqmp_disp_audio_disable(struct zynqmp_disp *disp)
{
zynqmp_disp_audio_write(disp, ZYNQMP_DISP_AUD_SOFT_RESET,
ZYNQMP_DISP_AUD_SOFT_RESET_AUD_SRST);
}
static void zynqmp_disp_audio_init(struct zynqmp_disp *disp)
{
/* Try the live PL audio clock. */
disp->audio.clk = devm_clk_get(disp->dev, "dp_live_audio_aclk");
if (!IS_ERR(disp->audio.clk)) {
disp->audio.clk_from_ps = false;
return;
}
/* If the live PL audio clock is not valid, fall back to PS clock. */
disp->audio.clk = devm_clk_get(disp->dev, "dp_aud_clk");
if (!IS_ERR(disp->audio.clk)) {
disp->audio.clk_from_ps = true;
return;
}
dev_err(disp->dev, "audio disabled due to missing clock\n");
}
/* -----------------------------------------------------------------------------
* ZynqMP Display external functions for zynqmp_dp
*/
/**
* zynqmp_disp_handle_vblank - Handle the vblank event
* @disp: Display controller
*
* This function handles the vblank interrupt, and sends an event to
* CRTC object. This will be called by the DP vblank interrupt handler.
*/
void zynqmp_disp_handle_vblank(struct zynqmp_disp *disp)
{
struct drm_crtc *crtc = &disp->crtc;
drm_crtc_handle_vblank(crtc);
}
/**
* zynqmp_disp_audio_enabled - If the audio is enabled
* @disp: Display controller
*
* Return if the audio is enabled depending on the audio clock.
*
* Return: true if audio is enabled, or false.
*/
bool zynqmp_disp_audio_enabled(struct zynqmp_disp *disp)
{
return !!disp->audio.clk;
}
/**
* zynqmp_disp_get_audio_clk_rate - Get the current audio clock rate
* @disp: Display controller
*
* Return: the current audio clock rate.
*/
unsigned int zynqmp_disp_get_audio_clk_rate(struct zynqmp_disp *disp)
{
if (zynqmp_disp_audio_enabled(disp))
return 0;
return clk_get_rate(disp->audio.clk);
}
/**
* zynqmp_disp_get_crtc_mask - Return the CRTC bit mask
* @disp: Display controller
*
* Return: the crtc mask of the zyqnmp_disp CRTC.
*/
uint32_t zynqmp_disp_get_crtc_mask(struct zynqmp_disp *disp)
{
return drm_crtc_mask(&disp->crtc);
}
/* -----------------------------------------------------------------------------
* ZynqMP Display Layer & DRM Plane
*/
/**
* zynqmp_disp_layer_find_format - Find format information for a DRM format
* @layer: The layer
* @drm_fmt: DRM format to search
*
* Search display subsystem format information corresponding to the given DRM
* format @drm_fmt for the @layer, and return a pointer to the format
* descriptor.
*
* Return: A pointer to the format descriptor if found, NULL otherwise
*/
static const struct zynqmp_disp_format *
zynqmp_disp_layer_find_format(struct zynqmp_disp_layer *layer,
u32 drm_fmt)
{
unsigned int i;
for (i = 0; i < layer->info->num_formats; i++) {
if (layer->info->formats[i].drm_fmt == drm_fmt)
return &layer->info->formats[i];
}
return NULL;
}
/**
* zynqmp_disp_layer_enable - Enable a layer
* @layer: The layer
*
* Enable the @layer in the audio/video buffer manager and the blender. DMA
* channels are started separately by zynqmp_disp_layer_update().
*/
static void zynqmp_disp_layer_enable(struct zynqmp_disp_layer *layer)
{
zynqmp_disp_avbuf_enable_video(layer->disp, layer,
ZYNQMP_DISP_LAYER_NONLIVE);
zynqmp_disp_blend_layer_enable(layer->disp, layer);
layer->mode = ZYNQMP_DISP_LAYER_NONLIVE;
}
/**
* zynqmp_disp_layer_disable - Disable the layer
* @layer: The layer
*
* Disable the layer by stopping its DMA channels and disabling it in the
* audio/video buffer manager and the blender.
*/
static void zynqmp_disp_layer_disable(struct zynqmp_disp_layer *layer)
{
unsigned int i;
for (i = 0; i < layer->drm_fmt->num_planes; i++)
dmaengine_terminate_sync(layer->dmas[i].chan);
zynqmp_disp_avbuf_disable_video(layer->disp, layer);
zynqmp_disp_blend_layer_disable(layer->disp, layer);
}
/**
* zynqmp_disp_layer_set_format - Set the layer format
* @layer: The layer
* @state: The plane state
*
* Set the format for @layer based on @state->fb->format. The layer must be
* disabled.
*/
static void zynqmp_disp_layer_set_format(struct zynqmp_disp_layer *layer,
struct drm_plane_state *state)
{
const struct drm_format_info *info = state->fb->format;
unsigned int i;
layer->disp_fmt = zynqmp_disp_layer_find_format(layer, info->format);
layer->drm_fmt = info;
zynqmp_disp_avbuf_set_format(layer->disp, layer, layer->disp_fmt);
/*
* Set pconfig for each DMA channel to indicate they're part of a
* video group.
*/
for (i = 0; i < info->num_planes; i++) {
struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
struct xilinx_dpdma_peripheral_config pconfig = {
.video_group = true,
};
struct dma_slave_config config = {
.direction = DMA_MEM_TO_DEV,
.peripheral_config = &pconfig,
.peripheral_size = sizeof(pconfig),
};
dmaengine_slave_config(dma->chan, &config);
}
}
/**
* zynqmp_disp_layer_update - Update the layer framebuffer
* @layer: The layer
* @state: The plane state
*
* Update the framebuffer for the layer by issuing a new DMA engine transaction
* for the new framebuffer.
*
* Return: 0 on success, or the DMA descriptor failure error otherwise
*/
static int zynqmp_disp_layer_update(struct zynqmp_disp_layer *layer,
struct drm_plane_state *state)
{
const struct drm_format_info *info = layer->drm_fmt;
unsigned int i;
for (i = 0; i < layer->drm_fmt->num_planes; i++) {
unsigned int width = state->crtc_w / (i ? info->hsub : 1);
unsigned int height = state->crtc_h / (i ? info->vsub : 1);
struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
struct dma_async_tx_descriptor *desc;
dma_addr_t dma_addr;
dma_addr = drm_fb_dma_get_gem_addr(state->fb, state, i);
dma->xt.numf = height;
dma->sgl.size = width * info->cpp[i];
dma->sgl.icg = state->fb->pitches[i] - dma->sgl.size;
dma->xt.src_start = dma_addr;
dma->xt.frame_size = 1;
dma->xt.dir = DMA_MEM_TO_DEV;
dma->xt.src_sgl = true;
dma->xt.dst_sgl = false;
desc = dmaengine_prep_interleaved_dma(dma->chan, &dma->xt,
DMA_CTRL_ACK |
DMA_PREP_REPEAT |
DMA_PREP_LOAD_EOT);
if (!desc) {
dev_err(layer->disp->dev,
"failed to prepare DMA descriptor\n");
return -ENOMEM;
}
dmaengine_submit(desc);
dma_async_issue_pending(dma->chan);
}
return 0;
}
static inline struct zynqmp_disp_layer *plane_to_layer(struct drm_plane *plane)
{
return container_of(plane, struct zynqmp_disp_layer, plane);
}
static int
zynqmp_disp_plane_atomic_check(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
plane);
struct drm_crtc_state *crtc_state;
if (!new_plane_state->crtc)
return 0;
crtc_state = drm_atomic_get_crtc_state(state, new_plane_state->crtc);
if (IS_ERR(crtc_state))
return PTR_ERR(crtc_state);
return drm_atomic_helper_check_plane_state(new_plane_state,
crtc_state,
DRM_PLANE_NO_SCALING,
DRM_PLANE_NO_SCALING,
false, false);
}
static void
zynqmp_disp_plane_atomic_disable(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state,
plane);
struct zynqmp_disp_layer *layer = plane_to_layer(plane);
if (!old_state->fb)
return;
zynqmp_disp_layer_disable(layer);
if (zynqmp_disp_layer_is_gfx(layer))
zynqmp_disp_blend_set_global_alpha(layer->disp, false,
plane->state->alpha >> 8);
}
static void
zynqmp_disp_plane_atomic_update(struct drm_plane *plane,
struct drm_atomic_state *state)
{
struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);
struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
struct zynqmp_disp_layer *layer = plane_to_layer(plane);
bool format_changed = false;
if (!old_state->fb ||
old_state->fb->format->format != new_state->fb->format->format)
format_changed = true;
/*
* If the format has changed (including going from a previously
* disabled state to any format), reconfigure the format. Disable the
* plane first if needed.
*/
if (format_changed) {
if (old_state->fb)
zynqmp_disp_layer_disable(layer);
zynqmp_disp_layer_set_format(layer, new_state);
}
zynqmp_disp_layer_update(layer, new_state);
if (zynqmp_disp_layer_is_gfx(layer))
zynqmp_disp_blend_set_global_alpha(layer->disp, true,
plane->state->alpha >> 8);
/* Enable or re-enable the plane is the format has changed. */
if (format_changed)
zynqmp_disp_layer_enable(layer);
}
static const struct drm_plane_helper_funcs zynqmp_disp_plane_helper_funcs = {
.atomic_check = zynqmp_disp_plane_atomic_check,
.atomic_update = zynqmp_disp_plane_atomic_update,
.atomic_disable = zynqmp_disp_plane_atomic_disable,
};
static const struct drm_plane_funcs zynqmp_disp_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
.destroy = drm_plane_cleanup,
.reset = drm_atomic_helper_plane_reset,
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
};
static int zynqmp_disp_create_planes(struct zynqmp_disp *disp)
{
unsigned int i, j;
int ret;
for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++) {
struct zynqmp_disp_layer *layer = &disp->layers[i];
enum drm_plane_type type;
u32 *drm_formats;
drm_formats = drmm_kcalloc(disp->drm, sizeof(*drm_formats),
layer->info->num_formats,
GFP_KERNEL);
if (!drm_formats)
return -ENOMEM;
for (j = 0; j < layer->info->num_formats; ++j)
drm_formats[j] = layer->info->formats[j].drm_fmt;
/* Graphics layer is primary, and video layer is overlay. */
type = zynqmp_disp_layer_is_video(layer)
? DRM_PLANE_TYPE_OVERLAY : DRM_PLANE_TYPE_PRIMARY;
ret = drm_universal_plane_init(disp->drm, &layer->plane, 0,
&zynqmp_disp_plane_funcs,
drm_formats,
layer->info->num_formats,
NULL, type, NULL);
if (ret)
return ret;
drm_plane_helper_add(&layer->plane,
&zynqmp_disp_plane_helper_funcs);
drm_plane_create_zpos_immutable_property(&layer->plane, i);
if (zynqmp_disp_layer_is_gfx(layer))
drm_plane_create_alpha_property(&layer->plane);
}
return 0;
}
/**
* zynqmp_disp_layer_release_dma - Release DMA channels for a layer
* @disp: Display controller
* @layer: The layer
*
* Release the DMA channels associated with @layer.
*/
static void zynqmp_disp_layer_release_dma(struct zynqmp_disp *disp,
struct zynqmp_disp_layer *layer)
{
unsigned int i;
if (!layer->info)
return;
for (i = 0; i < layer->info->num_channels; i++) {
struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
if (!dma->chan)
continue;
/* Make sure the channel is terminated before release. */
dmaengine_terminate_sync(dma->chan);
dma_release_channel(dma->chan);
}
}
/**
* zynqmp_disp_destroy_layers - Destroy all layers
* @disp: Display controller
*/
static void zynqmp_disp_destroy_layers(struct zynqmp_disp *disp)
{
unsigned int i;
for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++)
zynqmp_disp_layer_release_dma(disp, &disp->layers[i]);
}
/**
* zynqmp_disp_layer_request_dma - Request DMA channels for a layer
* @disp: Display controller
* @layer: The layer
*
* Request all DMA engine channels needed by @layer.
*
* Return: 0 on success, or the DMA channel request error otherwise
*/
static int zynqmp_disp_layer_request_dma(struct zynqmp_disp *disp,
struct zynqmp_disp_layer *layer)
{
static const char * const dma_names[] = { "vid", "gfx" };
unsigned int i;
int ret;
for (i = 0; i < layer->info->num_channels; i++) {
struct zynqmp_disp_layer_dma *dma = &layer->dmas[i];
char dma_channel_name[16];
snprintf(dma_channel_name, sizeof(dma_channel_name),
"%s%u", dma_names[layer->id], i);
dma->chan = dma_request_chan(disp->dev, dma_channel_name);
if (IS_ERR(dma->chan)) {
dev_err(disp->dev, "failed to request dma channel\n");
ret = PTR_ERR(dma->chan);
dma->chan = NULL;
return ret;
}
}
return 0;
}
/**
* zynqmp_disp_create_layers - Create and initialize all layers
* @disp: Display controller
*
* Return: 0 on success, or the DMA channel request error otherwise
*/
static int zynqmp_disp_create_layers(struct zynqmp_disp *disp)
{
static const struct zynqmp_disp_layer_info layer_info[] = {
[ZYNQMP_DISP_LAYER_VID] = {
.formats = avbuf_vid_fmts,
.num_formats = ARRAY_SIZE(avbuf_vid_fmts),
.num_channels = 3,
},
[ZYNQMP_DISP_LAYER_GFX] = {
.formats = avbuf_gfx_fmts,
.num_formats = ARRAY_SIZE(avbuf_gfx_fmts),
.num_channels = 1,
},
};
unsigned int i;
int ret;
for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++) {
struct zynqmp_disp_layer *layer = &disp->layers[i];
layer->id = i;
layer->disp = disp;
layer->info = &layer_info[i];
ret = zynqmp_disp_layer_request_dma(disp, layer);
if (ret)
goto err;
}
return 0;
err:
zynqmp_disp_destroy_layers(disp);
return ret;
}
/* -----------------------------------------------------------------------------
* ZynqMP Display & DRM CRTC
*/
/**
* zynqmp_disp_enable - Enable the display controller
* @disp: Display controller
*/
static void zynqmp_disp_enable(struct zynqmp_disp *disp)
{
zynqmp_disp_avbuf_enable(disp);
/* Choose clock source based on the DT clock handle. */
zynqmp_disp_avbuf_set_clocks_sources(disp, disp->pclk_from_ps,
disp->audio.clk_from_ps, true);
zynqmp_disp_avbuf_enable_channels(disp);
zynqmp_disp_avbuf_enable_audio(disp);
zynqmp_disp_audio_enable(disp);
}
/**
* zynqmp_disp_disable - Disable the display controller
* @disp: Display controller
*/
static void zynqmp_disp_disable(struct zynqmp_disp *disp)
{
zynqmp_disp_audio_disable(disp);
zynqmp_disp_avbuf_disable_audio(disp);
zynqmp_disp_avbuf_disable_channels(disp);
zynqmp_disp_avbuf_disable(disp);
}
static inline struct zynqmp_disp *crtc_to_disp(struct drm_crtc *crtc)
{
return container_of(crtc, struct zynqmp_disp, crtc);
}
static int zynqmp_disp_crtc_setup_clock(struct drm_crtc *crtc,
struct drm_display_mode *adjusted_mode)
{
struct zynqmp_disp *disp = crtc_to_disp(crtc);
unsigned long mode_clock = adjusted_mode->clock * 1000;
unsigned long rate;
long diff;
int ret;
ret = clk_set_rate(disp->pclk, mode_clock);
if (ret) {
dev_err(disp->dev, "failed to set a pixel clock\n");
return ret;
}
rate = clk_get_rate(disp->pclk);
diff = rate - mode_clock;
if (abs(diff) > mode_clock / 20)
dev_info(disp->dev,
"requested pixel rate: %lu actual rate: %lu\n",
mode_clock, rate);
else
dev_dbg(disp->dev,
"requested pixel rate: %lu actual rate: %lu\n",
mode_clock, rate);
return 0;
}
static void
zynqmp_disp_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct zynqmp_disp *disp = crtc_to_disp(crtc);
struct drm_display_mode *adjusted_mode = &crtc->state->adjusted_mode;
int ret, vrefresh;
pm_runtime_get_sync(disp->dev);
zynqmp_disp_crtc_setup_clock(crtc, adjusted_mode);
ret = clk_prepare_enable(disp->pclk);
if (ret) {
dev_err(disp->dev, "failed to enable a pixel clock\n");
pm_runtime_put_sync(disp->dev);
return;
}
zynqmp_disp_blend_set_output_format(disp, ZYNQMP_DPSUB_FORMAT_RGB);
zynqmp_disp_blend_set_bg_color(disp, 0, 0, 0);
zynqmp_disp_enable(disp);
/* Delay of 3 vblank intervals for timing gen to be stable */
vrefresh = (adjusted_mode->clock * 1000) /
(adjusted_mode->vtotal * adjusted_mode->htotal);
msleep(3 * 1000 / vrefresh);
}
static void
zynqmp_disp_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct zynqmp_disp *disp = crtc_to_disp(crtc);
struct drm_plane_state *old_plane_state;
/*
* Disable the plane if active. The old plane state can be NULL in the
* .shutdown() path if the plane is already disabled, skip
* zynqmp_disp_plane_atomic_disable() in that case.
*/
old_plane_state = drm_atomic_get_old_plane_state(state, crtc->primary);
if (old_plane_state)
zynqmp_disp_plane_atomic_disable(crtc->primary, state);
zynqmp_disp_disable(disp);
drm_crtc_vblank_off(&disp->crtc);
spin_lock_irq(&crtc->dev->event_lock);
if (crtc->state->event) {
drm_crtc_send_vblank_event(crtc, crtc->state->event);
crtc->state->event = NULL;
}
spin_unlock_irq(&crtc->dev->event_lock);
clk_disable_unprepare(disp->pclk);
pm_runtime_put_sync(disp->dev);
}
static int zynqmp_disp_crtc_atomic_check(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
return drm_atomic_add_affected_planes(state, crtc);
}
static void
zynqmp_disp_crtc_atomic_begin(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
drm_crtc_vblank_on(crtc);
}
static void
zynqmp_disp_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
if (crtc->state->event) {
struct drm_pending_vblank_event *event;
/* Consume the flip_done event from atomic helper. */
event = crtc->state->event;
crtc->state->event = NULL;
event->pipe = drm_crtc_index(crtc);
WARN_ON(drm_crtc_vblank_get(crtc) != 0);
spin_lock_irq(&crtc->dev->event_lock);
drm_crtc_arm_vblank_event(crtc, event);
spin_unlock_irq(&crtc->dev->event_lock);
}
}
static const struct drm_crtc_helper_funcs zynqmp_disp_crtc_helper_funcs = {
.atomic_enable = zynqmp_disp_crtc_atomic_enable,
.atomic_disable = zynqmp_disp_crtc_atomic_disable,
.atomic_check = zynqmp_disp_crtc_atomic_check,
.atomic_begin = zynqmp_disp_crtc_atomic_begin,
.atomic_flush = zynqmp_disp_crtc_atomic_flush,
};
static int zynqmp_disp_crtc_enable_vblank(struct drm_crtc *crtc)
{
struct zynqmp_disp *disp = crtc_to_disp(crtc);
zynqmp_dp_enable_vblank(disp->dpsub->dp);
return 0;
}
static void zynqmp_disp_crtc_disable_vblank(struct drm_crtc *crtc)
{
struct zynqmp_disp *disp = crtc_to_disp(crtc);
zynqmp_dp_disable_vblank(disp->dpsub->dp);
}
static const struct drm_crtc_funcs zynqmp_disp_crtc_funcs = {
.destroy = drm_crtc_cleanup,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.reset = drm_atomic_helper_crtc_reset,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
.enable_vblank = zynqmp_disp_crtc_enable_vblank,
.disable_vblank = zynqmp_disp_crtc_disable_vblank,
};
static int zynqmp_disp_create_crtc(struct zynqmp_disp *disp)
{
struct drm_plane *plane = &disp->layers[ZYNQMP_DISP_LAYER_GFX].plane;
int ret;
ret = drm_crtc_init_with_planes(disp->drm, &disp->crtc, plane,
NULL, &zynqmp_disp_crtc_funcs, NULL);
if (ret < 0)
return ret;
drm_crtc_helper_add(&disp->crtc, &zynqmp_disp_crtc_helper_funcs);
/* Start with vertical blanking interrupt reporting disabled. */
drm_crtc_vblank_off(&disp->crtc);
return 0;
}
static void zynqmp_disp_map_crtc_to_plane(struct zynqmp_disp *disp)
{
u32 possible_crtcs = drm_crtc_mask(&disp->crtc);
unsigned int i;
for (i = 0; i < ZYNQMP_DISP_NUM_LAYERS; i++)
disp->layers[i].plane.possible_crtcs = possible_crtcs;
}
/* -----------------------------------------------------------------------------
* Initialization & Cleanup
*/
int zynqmp_disp_drm_init(struct zynqmp_dpsub *dpsub)
{
struct zynqmp_disp *disp = dpsub->disp;
int ret;
ret = zynqmp_disp_create_planes(disp);
if (ret)
return ret;
ret = zynqmp_disp_create_crtc(disp);
if (ret < 0)
return ret;
zynqmp_disp_map_crtc_to_plane(disp);
return 0;
}
int zynqmp_disp_probe(struct zynqmp_dpsub *dpsub, struct drm_device *drm)
{
struct platform_device *pdev = to_platform_device(dpsub->dev);
struct zynqmp_disp *disp;
struct zynqmp_disp_layer *layer;
struct resource *res;
int ret;
disp = drmm_kzalloc(drm, sizeof(*disp), GFP_KERNEL);
if (!disp)
return -ENOMEM;
disp->dev = &pdev->dev;
disp->dpsub = dpsub;
disp->drm = drm;
dpsub->disp = disp;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "blend");
disp->blend.base = devm_ioremap_resource(disp->dev, res);
if (IS_ERR(disp->blend.base))
return PTR_ERR(disp->blend.base);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "av_buf");
disp->avbuf.base = devm_ioremap_resource(disp->dev, res);
if (IS_ERR(disp->avbuf.base))
return PTR_ERR(disp->avbuf.base);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aud");
disp->audio.base = devm_ioremap_resource(disp->dev, res);
if (IS_ERR(disp->audio.base))
return PTR_ERR(disp->audio.base);
/* Try the live PL video clock */
disp->pclk = devm_clk_get(disp->dev, "dp_live_video_in_clk");
if (!IS_ERR(disp->pclk))
disp->pclk_from_ps = false;
else if (PTR_ERR(disp->pclk) == -EPROBE_DEFER)
return PTR_ERR(disp->pclk);
/* If the live PL video clock is not valid, fall back to PS clock */
if (IS_ERR_OR_NULL(disp->pclk)) {
disp->pclk = devm_clk_get(disp->dev, "dp_vtc_pixel_clk_in");
if (IS_ERR(disp->pclk)) {
dev_err(disp->dev, "failed to init any video clock\n");
return PTR_ERR(disp->pclk);
}
disp->pclk_from_ps = true;
}
zynqmp_disp_audio_init(disp);
ret = zynqmp_disp_create_layers(disp);
if (ret)
return ret;
layer = &disp->layers[ZYNQMP_DISP_LAYER_VID];
dpsub->dma_align = 1 << layer->dmas[0].chan->device->copy_align;
return 0;
}
void zynqmp_disp_remove(struct zynqmp_dpsub *dpsub)
{
struct zynqmp_disp *disp = dpsub->disp;
zynqmp_disp_destroy_layers(disp);
}