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linux/drivers/gpu/drm/meson/meson_dw_hdmi.c

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/*
* Copyright (C) 2016 BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
* Copyright (C) 2015 Amlogic, Inc. All rights reserved.
*
* 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 <linux/component.h>
#include <linux/of_graph.h>
#include <linux/reset.h>
#include <linux/clk.h>
#include <linux/regulator/consumer.h>
#include <drm/drmP.h>
#include <drm/drm_edid.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/bridge/dw_hdmi.h>
#include <uapi/linux/media-bus-format.h>
#include <uapi/linux/videodev2.h>
#include "meson_drv.h"
#include "meson_venc.h"
#include "meson_vclk.h"
#include "meson_dw_hdmi.h"
#include "meson_registers.h"
#define DRIVER_NAME "meson-dw-hdmi"
#define DRIVER_DESC "Amlogic Meson HDMI-TX DRM driver"
/**
* DOC: HDMI Output
*
* HDMI Output is composed of :
*
* - A Synopsys DesignWare HDMI Controller IP
* - A TOP control block controlling the Clocks and PHY
* - A custom HDMI PHY in order convert video to TMDS signal
*
* .. code::
*
* ___________________________________
* | HDMI TOP |<= HPD
* |___________________________________|
* | | |
* | Synopsys HDMI | HDMI PHY |=> TMDS
* | Controller |________________|
* |___________________________________|<=> DDC
*
*
* The HDMI TOP block only supports HPD sensing.
* The Synopsys HDMI Controller interrupt is routed
* through the TOP Block interrupt.
* Communication to the TOP Block and the Synopsys
* HDMI Controller is done a pair of addr+read/write
* registers.
* The HDMI PHY is configured by registers in the
* HHI register block.
*
* Pixel data arrives in 4:4:4 format from the VENC
* block and the VPU HDMI mux selects either the ENCI
* encoder for the 576i or 480i formats or the ENCP
* encoder for all the other formats including
* interlaced HD formats.
* The VENC uses a DVI encoder on top of the ENCI
* or ENCP encoders to generate DVI timings for the
* HDMI controller.
*
* GXBB, GXL and GXM embeds the Synopsys DesignWare
* HDMI TX IP version 2.01a with HDCP and I2C & S/PDIF
* audio source interfaces.
*
* We handle the following features :
*
* - HPD Rise & Fall interrupt
* - HDMI Controller Interrupt
* - HDMI PHY Init for 480i to 1080p60
* - VENC & HDMI Clock setup for 480i to 1080p60
* - VENC Mode setup for 480i to 1080p60
*
* What is missing :
*
* - PHY, Clock and Mode setup for 2k && 4k modes
* - SDDC Scrambling mode for HDMI 2.0a
* - HDCP Setup
* - CEC Management
*/
/* TOP Block Communication Channel */
#define HDMITX_TOP_ADDR_REG 0x0
#define HDMITX_TOP_DATA_REG 0x4
#define HDMITX_TOP_CTRL_REG 0x8
/* Controller Communication Channel */
#define HDMITX_DWC_ADDR_REG 0x10
#define HDMITX_DWC_DATA_REG 0x14
#define HDMITX_DWC_CTRL_REG 0x18
/* HHI Registers */
#define HHI_MEM_PD_REG0 0x100 /* 0x40 */
#define HHI_HDMI_CLK_CNTL 0x1cc /* 0x73 */
#define HHI_HDMI_PHY_CNTL0 0x3a0 /* 0xe8 */
#define HHI_HDMI_PHY_CNTL1 0x3a4 /* 0xe9 */
#define HHI_HDMI_PHY_CNTL2 0x3a8 /* 0xea */
#define HHI_HDMI_PHY_CNTL3 0x3ac /* 0xeb */
static DEFINE_SPINLOCK(reg_lock);
enum meson_venc_source {
MESON_VENC_SOURCE_NONE = 0,
MESON_VENC_SOURCE_ENCI = 1,
MESON_VENC_SOURCE_ENCP = 2,
};
struct meson_dw_hdmi {
struct drm_encoder encoder;
struct dw_hdmi_plat_data dw_plat_data;
struct meson_drm *priv;
struct device *dev;
void __iomem *hdmitx;
struct reset_control *hdmitx_apb;
struct reset_control *hdmitx_ctrl;
struct reset_control *hdmitx_phy;
struct clk *hdmi_pclk;
struct clk *venci_clk;
struct regulator *hdmi_supply;
u32 irq_stat;
struct dw_hdmi *hdmi;
};
#define encoder_to_meson_dw_hdmi(x) \
container_of(x, struct meson_dw_hdmi, encoder)
static inline int dw_hdmi_is_compatible(struct meson_dw_hdmi *dw_hdmi,
const char *compat)
{
return of_device_is_compatible(dw_hdmi->dev->of_node, compat);
}
/* PHY (via TOP bridge) and Controller dedicated register interface */
static unsigned int dw_hdmi_top_read(struct meson_dw_hdmi *dw_hdmi,
unsigned int addr)
{
unsigned long flags;
unsigned int data;
spin_lock_irqsave(&reg_lock, flags);
/* ADDR must be written twice */
writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
/* Read needs a second DATA read */
data = readl(dw_hdmi->hdmitx + HDMITX_TOP_DATA_REG);
data = readl(dw_hdmi->hdmitx + HDMITX_TOP_DATA_REG);
spin_unlock_irqrestore(&reg_lock, flags);
return data;
}
static inline void dw_hdmi_top_write(struct meson_dw_hdmi *dw_hdmi,
unsigned int addr, unsigned int data)
{
unsigned long flags;
spin_lock_irqsave(&reg_lock, flags);
/* ADDR must be written twice */
writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_TOP_ADDR_REG);
/* Write needs single DATA write */
writel(data, dw_hdmi->hdmitx + HDMITX_TOP_DATA_REG);
spin_unlock_irqrestore(&reg_lock, flags);
}
/* Helper to change specific bits in PHY registers */
static inline void dw_hdmi_top_write_bits(struct meson_dw_hdmi *dw_hdmi,
unsigned int addr,
unsigned int mask,
unsigned int val)
{
unsigned int data = dw_hdmi_top_read(dw_hdmi, addr);
data &= ~mask;
data |= val;
dw_hdmi_top_write(dw_hdmi, addr, data);
}
static unsigned int dw_hdmi_dwc_read(struct meson_dw_hdmi *dw_hdmi,
unsigned int addr)
{
unsigned long flags;
unsigned int data;
spin_lock_irqsave(&reg_lock, flags);
/* ADDR must be written twice */
writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
/* Read needs a second DATA read */
data = readl(dw_hdmi->hdmitx + HDMITX_DWC_DATA_REG);
data = readl(dw_hdmi->hdmitx + HDMITX_DWC_DATA_REG);
spin_unlock_irqrestore(&reg_lock, flags);
return data;
}
static inline void dw_hdmi_dwc_write(struct meson_dw_hdmi *dw_hdmi,
unsigned int addr, unsigned int data)
{
unsigned long flags;
spin_lock_irqsave(&reg_lock, flags);
/* ADDR must be written twice */
writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
writel(addr & 0xffff, dw_hdmi->hdmitx + HDMITX_DWC_ADDR_REG);
/* Write needs single DATA write */
writel(data, dw_hdmi->hdmitx + HDMITX_DWC_DATA_REG);
spin_unlock_irqrestore(&reg_lock, flags);
}
/* Helper to change specific bits in controller registers */
static inline void dw_hdmi_dwc_write_bits(struct meson_dw_hdmi *dw_hdmi,
unsigned int addr,
unsigned int mask,
unsigned int val)
{
unsigned int data = dw_hdmi_dwc_read(dw_hdmi, addr);
data &= ~mask;
data |= val;
dw_hdmi_dwc_write(dw_hdmi, addr, data);
}
/* Bridge */
/* Setup PHY bandwidth modes */
static void meson_hdmi_phy_setup_mode(struct meson_dw_hdmi *dw_hdmi,
struct drm_display_mode *mode)
{
struct meson_drm *priv = dw_hdmi->priv;
unsigned int pixel_clock = mode->clock;
if (dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxl-dw-hdmi") ||
dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxm-dw-hdmi")) {
if (pixel_clock >= 371250) {
/* 5.94Gbps, 3.7125Gbps */
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x333d3282);
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2136315b);
} else if (pixel_clock >= 297000) {
/* 2.97Gbps */
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33303382);
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2036315b);
} else if (pixel_clock >= 148500) {
/* 1.485Gbps */
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33303362);
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2016315b);
} else {
/* 742.5Mbps, and below */
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33604142);
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x0016315b);
}
} else if (dw_hdmi_is_compatible(dw_hdmi,
"amlogic,meson-gxbb-dw-hdmi")) {
if (pixel_clock >= 371250) {
/* 5.94Gbps, 3.7125Gbps */
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33353245);
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2100115b);
} else if (pixel_clock >= 297000) {
/* 2.97Gbps */
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33634283);
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0xb000115b);
} else {
/* 1.485Gbps, and below */
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0x33632122);
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL3, 0x2000115b);
}
}
}
static inline void meson_dw_hdmi_phy_reset(struct meson_dw_hdmi *dw_hdmi)
{
struct meson_drm *priv = dw_hdmi->priv;
/* Enable and software reset */
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1, 0xf, 0xf);
mdelay(2);
/* Enable and unreset */
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1, 0xf, 0xe);
mdelay(2);
}
static void dw_hdmi_set_vclk(struct meson_dw_hdmi *dw_hdmi,
struct drm_display_mode *mode)
{
struct meson_drm *priv = dw_hdmi->priv;
int vic = drm_match_cea_mode(mode);
unsigned int vclk_freq;
unsigned int venc_freq;
unsigned int hdmi_freq;
vclk_freq = mode->clock;
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
vclk_freq *= 2;
venc_freq = vclk_freq;
hdmi_freq = vclk_freq;
if (meson_venc_hdmi_venc_repeat(vic))
venc_freq *= 2;
vclk_freq = max(venc_freq, hdmi_freq);
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
venc_freq /= 2;
DRM_DEBUG_DRIVER("vclk:%d venc=%d hdmi=%d enci=%d\n",
vclk_freq, venc_freq, hdmi_freq,
priv->venc.hdmi_use_enci);
meson_vclk_setup(priv, MESON_VCLK_TARGET_HDMI, vclk_freq,
venc_freq, hdmi_freq, priv->venc.hdmi_use_enci);
}
static int dw_hdmi_phy_init(struct dw_hdmi *hdmi, void *data,
struct drm_display_mode *mode)
{
struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
struct meson_drm *priv = dw_hdmi->priv;
unsigned int wr_clk =
readl_relaxed(priv->io_base + _REG(VPU_HDMI_SETTING));
DRM_DEBUG_DRIVER("%d:\"%s\"\n", mode->base.id, mode->name);
/* Enable clocks */
regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, 0xffff, 0x100);
/* Bring HDMITX MEM output of power down */
regmap_update_bits(priv->hhi, HHI_MEM_PD_REG0, 0xff << 8, 0);
/* Bring out of reset */
dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_SW_RESET, 0);
/* Enable internal pixclk, tmds_clk, spdif_clk, i2s_clk, cecclk */
dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_CLK_CNTL,
0x3, 0x3);
dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_CLK_CNTL,
0x3 << 4, 0x3 << 4);
/* Enable normal output to PHY */
dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_BIST_CNTL, BIT(12));
/* TMDS pattern setup (TOFIX pattern for 4k2k scrambling) */
dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_01, 0x001f001f);
dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_23, 0x001f001f);
/* Load TMDS pattern */
dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_CNTL, 0x1);
msleep(20);
dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_TMDS_CLK_PTTN_CNTL, 0x2);
/* Setup PHY parameters */
meson_hdmi_phy_setup_mode(dw_hdmi, mode);
/* Setup PHY */
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
0xffff << 16, 0x0390 << 16);
/* BIT_INVERT */
if (dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxl-dw-hdmi") ||
dw_hdmi_is_compatible(dw_hdmi, "amlogic,meson-gxm-dw-hdmi"))
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
BIT(17), 0);
else
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
BIT(17), BIT(17));
/* Disable clock, fifo, fifo_wr */
regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1, 0xf, 0);
msleep(100);
/* Reset PHY 3 times in a row */
meson_dw_hdmi_phy_reset(dw_hdmi);
meson_dw_hdmi_phy_reset(dw_hdmi);
meson_dw_hdmi_phy_reset(dw_hdmi);
/* Temporary Disable VENC video stream */
if (priv->venc.hdmi_use_enci)
writel_relaxed(0, priv->io_base + _REG(ENCI_VIDEO_EN));
else
writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
/* Temporary Disable HDMI video stream to HDMI-TX */
writel_bits_relaxed(0x3, 0,
priv->io_base + _REG(VPU_HDMI_SETTING));
writel_bits_relaxed(0xf << 8, 0,
priv->io_base + _REG(VPU_HDMI_SETTING));
/* Re-Enable VENC video stream */
if (priv->venc.hdmi_use_enci)
writel_relaxed(1, priv->io_base + _REG(ENCI_VIDEO_EN));
else
writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
/* Push back HDMI clock settings */
writel_bits_relaxed(0xf << 8, wr_clk & (0xf << 8),
priv->io_base + _REG(VPU_HDMI_SETTING));
/* Enable and Select HDMI video source for HDMI-TX */
if (priv->venc.hdmi_use_enci)
writel_bits_relaxed(0x3, MESON_VENC_SOURCE_ENCI,
priv->io_base + _REG(VPU_HDMI_SETTING));
else
writel_bits_relaxed(0x3, MESON_VENC_SOURCE_ENCP,
priv->io_base + _REG(VPU_HDMI_SETTING));
return 0;
}
static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi,
void *data)
{
struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
struct meson_drm *priv = dw_hdmi->priv;
DRM_DEBUG_DRIVER("\n");
regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0);
}
static enum drm_connector_status dw_hdmi_read_hpd(struct dw_hdmi *hdmi,
void *data)
{
struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
return !!dw_hdmi_top_read(dw_hdmi, HDMITX_TOP_STAT0) ?
connector_status_connected : connector_status_disconnected;
}
static void dw_hdmi_setup_hpd(struct dw_hdmi *hdmi,
void *data)
{
struct meson_dw_hdmi *dw_hdmi = (struct meson_dw_hdmi *)data;
/* Setup HPD Filter */
dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_HPD_FILTER,
(0xa << 12) | 0xa0);
/* Clear interrupts */
dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_INTR_STAT_CLR,
HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL);
/* Unmask interrupts */
dw_hdmi_top_write_bits(dw_hdmi, HDMITX_TOP_INTR_MASKN,
HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL,
HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL);
}
static const struct dw_hdmi_phy_ops meson_dw_hdmi_phy_ops = {
.init = dw_hdmi_phy_init,
.disable = dw_hdmi_phy_disable,
.read_hpd = dw_hdmi_read_hpd,
.setup_hpd = dw_hdmi_setup_hpd,
};
static irqreturn_t dw_hdmi_top_irq(int irq, void *dev_id)
{
struct meson_dw_hdmi *dw_hdmi = dev_id;
u32 stat;
stat = dw_hdmi_top_read(dw_hdmi, HDMITX_TOP_INTR_STAT);
dw_hdmi_top_write(dw_hdmi, HDMITX_TOP_INTR_STAT_CLR, stat);
/* HPD Events, handle in the threaded interrupt handler */
if (stat & (HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL)) {
dw_hdmi->irq_stat = stat;
return IRQ_WAKE_THREAD;
}
/* HDMI Controller Interrupt */
if (stat & 1)
return IRQ_NONE;
/* TOFIX Handle HDCP Interrupts */
return IRQ_HANDLED;
}
/* Threaded interrupt handler to manage HPD events */
static irqreturn_t dw_hdmi_top_thread_irq(int irq, void *dev_id)
{
struct meson_dw_hdmi *dw_hdmi = dev_id;
u32 stat = dw_hdmi->irq_stat;
/* HPD Events */
if (stat & (HDMITX_TOP_INTR_HPD_RISE | HDMITX_TOP_INTR_HPD_FALL)) {
bool hpd_connected = false;
if (stat & HDMITX_TOP_INTR_HPD_RISE)
hpd_connected = true;
dw_hdmi_setup_rx_sense(dw_hdmi->hdmi, hpd_connected,
hpd_connected);
drm_helper_hpd_irq_event(dw_hdmi->encoder.dev);
}
return IRQ_HANDLED;
}
static enum drm_mode_status
dw_hdmi_mode_valid(struct drm_connector *connector,
const struct drm_display_mode *mode)
{
unsigned int vclk_freq;
unsigned int venc_freq;
unsigned int hdmi_freq;
int vic = drm_match_cea_mode(mode);
DRM_DEBUG_DRIVER("Modeline %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x\n",
mode->base.id, mode->name, mode->vrefresh, mode->clock,
mode->hdisplay, mode->hsync_start,
mode->hsync_end, mode->htotal,
mode->vdisplay, mode->vsync_start,
mode->vsync_end, mode->vtotal, mode->type, mode->flags);
/* Check against non-VIC supported modes */
if (!vic) {
if (!meson_venc_hdmi_supported_mode(mode))
return MODE_BAD;
/* Check against supported VIC modes */
} else if (!meson_venc_hdmi_supported_vic(vic))
return MODE_BAD;
vclk_freq = mode->clock;
/* 480i/576i needs global pixel doubling */
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
vclk_freq *= 2;
venc_freq = vclk_freq;
hdmi_freq = vclk_freq;
/* VENC double pixels for 1080i and 720p modes */
if (meson_venc_hdmi_venc_repeat(vic))
venc_freq *= 2;
vclk_freq = max(venc_freq, hdmi_freq);
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
venc_freq /= 2;
dev_dbg(connector->dev->dev, "%s: vclk:%d venc=%d hdmi=%d\n", __func__,
vclk_freq, venc_freq, hdmi_freq);
/* Finally filter by configurable vclk frequencies */
switch (vclk_freq) {
case 25175:
case 40000:
case 54000:
case 65000:
case 74250:
case 108000:
case 148500:
case 162000:
case 297000:
case 594000:
return MODE_OK;
}
return MODE_CLOCK_RANGE;
}
/* Encoder */
static void meson_venc_hdmi_encoder_destroy(struct drm_encoder *encoder)
{
drm_encoder_cleanup(encoder);
}
static const struct drm_encoder_funcs meson_venc_hdmi_encoder_funcs = {
.destroy = meson_venc_hdmi_encoder_destroy,
};
static int meson_venc_hdmi_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
return 0;
}
static void meson_venc_hdmi_encoder_disable(struct drm_encoder *encoder)
{
struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
struct meson_drm *priv = dw_hdmi->priv;
DRM_DEBUG_DRIVER("\n");
writel_bits_relaxed(0x3, 0,
priv->io_base + _REG(VPU_HDMI_SETTING));
writel_relaxed(0, priv->io_base + _REG(ENCI_VIDEO_EN));
writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
}
static void meson_venc_hdmi_encoder_enable(struct drm_encoder *encoder)
{
struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
struct meson_drm *priv = dw_hdmi->priv;
DRM_DEBUG_DRIVER("%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP");
if (priv->venc.hdmi_use_enci)
writel_relaxed(1, priv->io_base + _REG(ENCI_VIDEO_EN));
else
writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
}
static void meson_venc_hdmi_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct meson_dw_hdmi *dw_hdmi = encoder_to_meson_dw_hdmi(encoder);
struct meson_drm *priv = dw_hdmi->priv;
int vic = drm_match_cea_mode(mode);
DRM_DEBUG_DRIVER("%d:\"%s\" vic %d\n",
mode->base.id, mode->name, vic);
/* VENC + VENC-DVI Mode setup */
meson_venc_hdmi_mode_set(priv, vic, mode);
/* VCLK Set clock */
dw_hdmi_set_vclk(dw_hdmi, mode);
/* Setup YUV444 to HDMI-TX, no 10bit diphering */
writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
}
static const struct drm_encoder_helper_funcs
meson_venc_hdmi_encoder_helper_funcs = {
.atomic_check = meson_venc_hdmi_encoder_atomic_check,
.disable = meson_venc_hdmi_encoder_disable,
.enable = meson_venc_hdmi_encoder_enable,
.mode_set = meson_venc_hdmi_encoder_mode_set,
};
/* DW HDMI Regmap */
static int meson_dw_hdmi_reg_read(void *context, unsigned int reg,
unsigned int *result)
{
*result = dw_hdmi_dwc_read(context, reg);
return 0;
}
static int meson_dw_hdmi_reg_write(void *context, unsigned int reg,
unsigned int val)
{
dw_hdmi_dwc_write(context, reg, val);
return 0;
}
static const struct regmap_config meson_dw_hdmi_regmap_config = {
.reg_bits = 32,
.val_bits = 8,
.reg_read = meson_dw_hdmi_reg_read,
.reg_write = meson_dw_hdmi_reg_write,
.max_register = 0x10000,
};
static bool meson_hdmi_connector_is_available(struct device *dev)
{
struct device_node *ep, *remote;
/* HDMI Connector is on the second port, first endpoint */
ep = of_graph_get_endpoint_by_regs(dev->of_node, 1, 0);
if (!ep)
return false;
/* If the endpoint node exists, consider it enabled */
remote = of_graph_get_remote_port(ep);
if (remote) {
of_node_put(ep);
return true;
}
of_node_put(ep);
of_node_put(remote);
return false;
}
static int meson_dw_hdmi_bind(struct device *dev, struct device *master,
void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct meson_dw_hdmi *meson_dw_hdmi;
struct drm_device *drm = data;
struct meson_drm *priv = drm->dev_private;
struct dw_hdmi_plat_data *dw_plat_data;
struct drm_encoder *encoder;
struct resource *res;
int irq;
int ret;
DRM_DEBUG_DRIVER("\n");
if (!meson_hdmi_connector_is_available(dev)) {
dev_info(drm->dev, "HDMI Output connector not available\n");
return -ENODEV;
}
meson_dw_hdmi = devm_kzalloc(dev, sizeof(*meson_dw_hdmi),
GFP_KERNEL);
if (!meson_dw_hdmi)
return -ENOMEM;
meson_dw_hdmi->priv = priv;
meson_dw_hdmi->dev = dev;
dw_plat_data = &meson_dw_hdmi->dw_plat_data;
encoder = &meson_dw_hdmi->encoder;
meson_dw_hdmi->hdmi_supply = devm_regulator_get_optional(dev, "hdmi");
if (IS_ERR(meson_dw_hdmi->hdmi_supply)) {
if (PTR_ERR(meson_dw_hdmi->hdmi_supply) == -EPROBE_DEFER)
return -EPROBE_DEFER;
meson_dw_hdmi->hdmi_supply = NULL;
} else {
ret = regulator_enable(meson_dw_hdmi->hdmi_supply);
if (ret)
return ret;
}
meson_dw_hdmi->hdmitx_apb = devm_reset_control_get_exclusive(dev,
"hdmitx_apb");
if (IS_ERR(meson_dw_hdmi->hdmitx_apb)) {
dev_err(dev, "Failed to get hdmitx_apb reset\n");
return PTR_ERR(meson_dw_hdmi->hdmitx_apb);
}
meson_dw_hdmi->hdmitx_ctrl = devm_reset_control_get_exclusive(dev,
"hdmitx");
if (IS_ERR(meson_dw_hdmi->hdmitx_ctrl)) {
dev_err(dev, "Failed to get hdmitx reset\n");
return PTR_ERR(meson_dw_hdmi->hdmitx_ctrl);
}
meson_dw_hdmi->hdmitx_phy = devm_reset_control_get_exclusive(dev,
"hdmitx_phy");
if (IS_ERR(meson_dw_hdmi->hdmitx_phy)) {
dev_err(dev, "Failed to get hdmitx_phy reset\n");
return PTR_ERR(meson_dw_hdmi->hdmitx_phy);
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
meson_dw_hdmi->hdmitx = devm_ioremap_resource(dev, res);
if (IS_ERR(meson_dw_hdmi->hdmitx))
return PTR_ERR(meson_dw_hdmi->hdmitx);
meson_dw_hdmi->hdmi_pclk = devm_clk_get(dev, "isfr");
if (IS_ERR(meson_dw_hdmi->hdmi_pclk)) {
dev_err(dev, "Unable to get HDMI pclk\n");
return PTR_ERR(meson_dw_hdmi->hdmi_pclk);
}
clk_prepare_enable(meson_dw_hdmi->hdmi_pclk);
meson_dw_hdmi->venci_clk = devm_clk_get(dev, "venci");
if (IS_ERR(meson_dw_hdmi->venci_clk)) {
dev_err(dev, "Unable to get venci clk\n");
return PTR_ERR(meson_dw_hdmi->venci_clk);
}
clk_prepare_enable(meson_dw_hdmi->venci_clk);
dw_plat_data->regm = devm_regmap_init(dev, NULL, meson_dw_hdmi,
&meson_dw_hdmi_regmap_config);
if (IS_ERR(dw_plat_data->regm))
return PTR_ERR(dw_plat_data->regm);
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(dev, "Failed to get hdmi top irq\n");
return irq;
}
ret = devm_request_threaded_irq(dev, irq, dw_hdmi_top_irq,
dw_hdmi_top_thread_irq, IRQF_SHARED,
"dw_hdmi_top_irq", meson_dw_hdmi);
if (ret) {
dev_err(dev, "Failed to request hdmi top irq\n");
return ret;
}
/* Encoder */
drm_encoder_helper_add(encoder, &meson_venc_hdmi_encoder_helper_funcs);
ret = drm_encoder_init(drm, encoder, &meson_venc_hdmi_encoder_funcs,
DRM_MODE_ENCODER_TMDS, "meson_hdmi");
if (ret) {
dev_err(priv->dev, "Failed to init HDMI encoder\n");
return ret;
}
encoder->possible_crtcs = BIT(0);
DRM_DEBUG_DRIVER("encoder initialized\n");
/* Enable clocks */
regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, 0xffff, 0x100);
/* Bring HDMITX MEM output of power down */
regmap_update_bits(priv->hhi, HHI_MEM_PD_REG0, 0xff << 8, 0);
/* Reset HDMITX APB & TX & PHY */
reset_control_reset(meson_dw_hdmi->hdmitx_apb);
reset_control_reset(meson_dw_hdmi->hdmitx_ctrl);
reset_control_reset(meson_dw_hdmi->hdmitx_phy);
/* Enable APB3 fail on error */
writel_bits_relaxed(BIT(15), BIT(15),
meson_dw_hdmi->hdmitx + HDMITX_TOP_CTRL_REG);
writel_bits_relaxed(BIT(15), BIT(15),
meson_dw_hdmi->hdmitx + HDMITX_DWC_CTRL_REG);
/* Bring out of reset */
dw_hdmi_top_write(meson_dw_hdmi, HDMITX_TOP_SW_RESET, 0);
msleep(20);
dw_hdmi_top_write(meson_dw_hdmi, HDMITX_TOP_CLK_CNTL, 0xff);
/* Enable HDMI-TX Interrupt */
dw_hdmi_top_write(meson_dw_hdmi, HDMITX_TOP_INTR_STAT_CLR,
HDMITX_TOP_INTR_CORE);
dw_hdmi_top_write(meson_dw_hdmi, HDMITX_TOP_INTR_MASKN,
HDMITX_TOP_INTR_CORE);
/* Bridge / Connector */
dw_plat_data->mode_valid = dw_hdmi_mode_valid;
dw_plat_data->phy_ops = &meson_dw_hdmi_phy_ops;
dw_plat_data->phy_name = "meson_dw_hdmi_phy";
dw_plat_data->phy_data = meson_dw_hdmi;
dw_plat_data->input_bus_format = MEDIA_BUS_FMT_YUV8_1X24;
dw_plat_data->input_bus_encoding = V4L2_YCBCR_ENC_709;
platform_set_drvdata(pdev, meson_dw_hdmi);
meson_dw_hdmi->hdmi = dw_hdmi_bind(pdev, encoder,
&meson_dw_hdmi->dw_plat_data);
if (IS_ERR(meson_dw_hdmi->hdmi))
return PTR_ERR(meson_dw_hdmi->hdmi);
DRM_DEBUG_DRIVER("HDMI controller initialized\n");
return 0;
}
static void meson_dw_hdmi_unbind(struct device *dev, struct device *master,
void *data)
{
struct meson_dw_hdmi *meson_dw_hdmi = dev_get_drvdata(dev);
dw_hdmi_unbind(meson_dw_hdmi->hdmi);
}
static const struct component_ops meson_dw_hdmi_ops = {
.bind = meson_dw_hdmi_bind,
.unbind = meson_dw_hdmi_unbind,
};
static int meson_dw_hdmi_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &meson_dw_hdmi_ops);
}
static int meson_dw_hdmi_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &meson_dw_hdmi_ops);
return 0;
}
static const struct of_device_id meson_dw_hdmi_of_table[] = {
{ .compatible = "amlogic,meson-gxbb-dw-hdmi" },
{ .compatible = "amlogic,meson-gxl-dw-hdmi" },
{ .compatible = "amlogic,meson-gxm-dw-hdmi" },
{ }
};
MODULE_DEVICE_TABLE(of, meson_dw_hdmi_of_table);
static struct platform_driver meson_dw_hdmi_platform_driver = {
.probe = meson_dw_hdmi_probe,
.remove = meson_dw_hdmi_remove,
.driver = {
.name = DRIVER_NAME,
.of_match_table = meson_dw_hdmi_of_table,
},
};
module_platform_driver(meson_dw_hdmi_platform_driver);
MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
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