Orange Pi5 kernel

/*
 * Copyright © 2016 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 *
 */
 
#include <drm/drm_atomic_helper.h>
#include <drm/drm_dp_dual_mode_helper.h>
#include <drm/drm_edid.h>
 
#include "intel_display_types.h"
#include "intel_dp.h"
#include "intel_lspcon.h"
 
/* LSPCON OUI Vendor ID(signatures) */
#define LSPCON_VENDOR_PARADE_OUI 0x001CF8
#define LSPCON_VENDOR_MCA_OUI 0x0060AD
 
/* AUX addresses to write MCA AVI IF */
#define LSPCON_MCA_AVI_IF_WRITE_OFFSET 0x5C0
#define LSPCON_MCA_AVI_IF_CTRL 0x5DF
#define  LSPCON_MCA_AVI_IF_KICKOFF (1 << 0)
#define  LSPCON_MCA_AVI_IF_HANDLED (1 << 1)
 
/* AUX addresses to write Parade AVI IF */
#define LSPCON_PARADE_AVI_IF_WRITE_OFFSET 0x516
#define LSPCON_PARADE_AVI_IF_CTRL 0x51E
#define  LSPCON_PARADE_AVI_IF_KICKOFF (1 << 7)
#define LSPCON_PARADE_AVI_IF_DATA_SIZE 32
 
static struct intel_dp *lspcon_to_intel_dp(struct intel_lspcon *lspcon)
{
<------>struct intel_digital_port *dig_port =
<------><------>container_of(lspcon, struct intel_digital_port, lspcon);
 
<------>return &dig_port->dp;
}
 
static const char *lspcon_mode_name(enum drm_lspcon_mode mode)
{
<------>switch (mode) {
<------>case DRM_LSPCON_MODE_PCON:
<------><------>return "PCON";
<------>case DRM_LSPCON_MODE_LS:
<------><------>return "LS";
<------>case DRM_LSPCON_MODE_INVALID:
<------><------>return "INVALID";
<------>default:
<------><------>MISSING_CASE(mode);
<------><------>return "INVALID";
<------>}
}
 
static bool lspcon_detect_vendor(struct intel_lspcon *lspcon)
{
<------>struct intel_dp *dp = lspcon_to_intel_dp(lspcon);
<------>struct drm_dp_dpcd_ident *ident;
<------>u32 vendor_oui;
 
<------>if (drm_dp_read_desc(&dp->aux, &dp->desc, drm_dp_is_branch(dp->dpcd))) {
<------><------>DRM_ERROR("Can't read description\n");
<------><------>return false;
<------>}
 
<------>ident = &dp->desc.ident;
<------>vendor_oui = (ident->oui[0] << 16) | (ident->oui[1] << 8) |
<------><------>      ident->oui[2];
 
<------>switch (vendor_oui) {
<------>case LSPCON_VENDOR_MCA_OUI:
<------><------>lspcon->vendor = LSPCON_VENDOR_MCA;
<------><------>DRM_DEBUG_KMS("Vendor: Mega Chips\n");
<------><------>break;
 
<------>case LSPCON_VENDOR_PARADE_OUI:
<------><------>lspcon->vendor = LSPCON_VENDOR_PARADE;
<------><------>DRM_DEBUG_KMS("Vendor: Parade Tech\n");
<------><------>break;
 
<------>default:
<------><------>DRM_ERROR("Invalid/Unknown vendor OUI\n");
<------><------>return false;
<------>}
 
<------>return true;
}
 
static enum drm_lspcon_mode lspcon_get_current_mode(struct intel_lspcon *lspcon)
{
<------>enum drm_lspcon_mode current_mode;
<------>struct i2c_adapter *adapter = &lspcon_to_intel_dp(lspcon)->aux.ddc;
 
<------>if (drm_lspcon_get_mode(adapter, &current_mode)) {
<------><------>DRM_DEBUG_KMS("Error reading LSPCON mode\n");
<------><------>return DRM_LSPCON_MODE_INVALID;
<------>}
<------>return current_mode;
}
 
static enum drm_lspcon_mode lspcon_wait_mode(struct intel_lspcon *lspcon,
<------><------><------><------><------>     enum drm_lspcon_mode mode)
{
<------>enum drm_lspcon_mode current_mode;
 
<------>current_mode = lspcon_get_current_mode(lspcon);
<------>if (current_mode == mode)
<------><------>goto out;
 
<------>DRM_DEBUG_KMS("Waiting for LSPCON mode %s to settle\n",
<------><------>      lspcon_mode_name(mode));
 
<------>wait_for((current_mode = lspcon_get_current_mode(lspcon)) == mode, 400);
<------>if (current_mode != mode)
<------><------>DRM_ERROR("LSPCON mode hasn't settled\n");
 
out:
<------>DRM_DEBUG_KMS("Current LSPCON mode %s\n",
<------><------>      lspcon_mode_name(current_mode));
 
<------>return current_mode;
}
 
static int lspcon_change_mode(struct intel_lspcon *lspcon,
<------><------><------>      enum drm_lspcon_mode mode)
{
<------>int err;
<------>enum drm_lspcon_mode current_mode;
<------>struct i2c_adapter *adapter = &lspcon_to_intel_dp(lspcon)->aux.ddc;
 
<------>err = drm_lspcon_get_mode(adapter, &current_mode);
<------>if (err) {
<------><------>DRM_ERROR("Error reading LSPCON mode\n");
<------><------>return err;
<------>}
 
<------>if (current_mode == mode) {
<------><------>DRM_DEBUG_KMS("Current mode = desired LSPCON mode\n");
<------><------>return 0;
<------>}
 
<------>err = drm_lspcon_set_mode(adapter, mode);
<------>if (err < 0) {
<------><------>DRM_ERROR("LSPCON mode change failed\n");
<------><------>return err;
<------>}
 
<------>lspcon->mode = mode;
<------>DRM_DEBUG_KMS("LSPCON mode changed done\n");
<------>return 0;
}
 
static bool lspcon_wake_native_aux_ch(struct intel_lspcon *lspcon)
{
<------>u8 rev;
 
<------>if (drm_dp_dpcd_readb(&lspcon_to_intel_dp(lspcon)->aux, DP_DPCD_REV,
<------><------><------>      &rev) != 1) {
<------><------>DRM_DEBUG_KMS("Native AUX CH down\n");
<------><------>return false;
<------>}
 
<------>DRM_DEBUG_KMS("Native AUX CH up, DPCD version: %d.%d\n",
<------><------>      rev >> 4, rev & 0xf);
 
<------>return true;
}
 
void lspcon_ycbcr420_config(struct drm_connector *connector,
<------><------><------>    struct intel_crtc_state *crtc_state)
{
<------>const struct drm_display_info *info = &connector->display_info;
<------>const struct drm_display_mode *adjusted_mode =
<------><------><------><------><------>&crtc_state->hw.adjusted_mode;
 
<------>if (drm_mode_is_420_only(info, adjusted_mode) &&
<------>    connector->ycbcr_420_allowed) {
<------><------>crtc_state->port_clock /= 2;
<------><------>crtc_state->output_format = INTEL_OUTPUT_FORMAT_YCBCR444;
<------><------>crtc_state->lspcon_downsampling = true;
<------>}
}
 
static bool lspcon_probe(struct intel_lspcon *lspcon)
{
<------>int retry;
<------>enum drm_dp_dual_mode_type adaptor_type;
<------>struct i2c_adapter *adapter = &lspcon_to_intel_dp(lspcon)->aux.ddc;
<------>enum drm_lspcon_mode expected_mode;
 
<------>expected_mode = lspcon_wake_native_aux_ch(lspcon) ?
<------><------><------>DRM_LSPCON_MODE_PCON : DRM_LSPCON_MODE_LS;
 
<------>/* Lets probe the adaptor and check its type */
<------>for (retry = 0; retry < 6; retry++) {
<------><------>if (retry)
<------><------><------>usleep_range(500, 1000);
 
<------><------>adaptor_type = drm_dp_dual_mode_detect(adapter);
<------><------>if (adaptor_type == DRM_DP_DUAL_MODE_LSPCON)
<------><------><------>break;
<------>}
 
<------>if (adaptor_type != DRM_DP_DUAL_MODE_LSPCON) {
<------><------>DRM_DEBUG_KMS("No LSPCON detected, found %s\n",
<------><------><------>       drm_dp_get_dual_mode_type_name(adaptor_type));
<------><------>return false;
<------>}
 
<------>/* Yay ... got a LSPCON device */
<------>DRM_DEBUG_KMS("LSPCON detected\n");
<------>lspcon->mode = lspcon_wait_mode(lspcon, expected_mode);
 
<------>/*
<------> * In the SW state machine, lets Put LSPCON in PCON mode only.
<------> * In this way, it will work with both HDMI 1.4 sinks as well as HDMI
<------> * 2.0 sinks.
<------> */
<------>if (lspcon->mode != DRM_LSPCON_MODE_PCON) {
<------><------>if (lspcon_change_mode(lspcon, DRM_LSPCON_MODE_PCON) < 0) {
<------><------><------>DRM_ERROR("LSPCON mode change to PCON failed\n");
<------><------><------>return false;
<------><------>}
<------>}
<------>return true;
}
 
static void lspcon_resume_in_pcon_wa(struct intel_lspcon *lspcon)
{
<------>struct intel_dp *intel_dp = lspcon_to_intel_dp(lspcon);
<------>struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
<------>unsigned long start = jiffies;
 
<------>while (1) {
<------><------>if (intel_digital_port_connected(&dig_port->base)) {
<------><------><------>DRM_DEBUG_KMS("LSPCON recovering in PCON mode after %u ms\n",
<------><------><------><------>      jiffies_to_msecs(jiffies - start));
<------><------><------>return;
<------><------>}
 
<------><------>if (time_after(jiffies, start + msecs_to_jiffies(1000)))
<------><------><------>break;
 
<------><------>usleep_range(10000, 15000);
<------>}
 
<------>DRM_DEBUG_KMS("LSPCON DP descriptor mismatch after resume\n");
}
 
static bool lspcon_parade_fw_ready(struct drm_dp_aux *aux)
{
<------>u8 avi_if_ctrl;
<------>u8 retry;
<------>ssize_t ret;
 
<------>/* Check if LSPCON FW is ready for data */
<------>for (retry = 0; retry < 5; retry++) {
<------><------>if (retry)
<------><------><------>usleep_range(200, 300);
 
<------><------>ret = drm_dp_dpcd_read(aux, LSPCON_PARADE_AVI_IF_CTRL,
<------><------><------><------>       &avi_if_ctrl, 1);
<------><------>if (ret < 0) {
<------><------><------>DRM_ERROR("Failed to read AVI IF control\n");
<------><------><------>return false;
<------><------>}
 
<------><------>if ((avi_if_ctrl & LSPCON_PARADE_AVI_IF_KICKOFF) == 0)
<------><------><------>return true;
<------>}
 
<------>DRM_ERROR("Parade FW not ready to accept AVI IF\n");
<------>return false;
}
 
static bool _lspcon_parade_write_infoframe_blocks(struct drm_dp_aux *aux,
<------><------><------><------><------><------>  u8 *avi_buf)
{
<------>u8 avi_if_ctrl;
<------>u8 block_count = 0;
<------>u8 *data;
<------>u16 reg;
<------>ssize_t ret;
 
<------>while (block_count < 4) {
<------><------>if (!lspcon_parade_fw_ready(aux)) {
<------><------><------>DRM_DEBUG_KMS("LSPCON FW not ready, block %d\n",
<------><------><------><------>      block_count);
<------><------><------>return false;
<------><------>}
 
<------><------>reg = LSPCON_PARADE_AVI_IF_WRITE_OFFSET;
<------><------>data = avi_buf + block_count * 8;
<------><------>ret = drm_dp_dpcd_write(aux, reg, data, 8);
<------><------>if (ret < 0) {
<------><------><------>DRM_ERROR("Failed to write AVI IF block %d\n",
<------><------><------><------>  block_count);
<------><------><------>return false;
<------><------>}
 
<------><------>/*
<------><------> * Once a block of data is written, we have to inform the FW
<------><------> * about this by writing into avi infoframe control register:
<------><------> * - set the kickoff bit[7] to 1
<------><------> * - write the block no. to bits[1:0]
<------><------> */
<------><------>reg = LSPCON_PARADE_AVI_IF_CTRL;
<------><------>avi_if_ctrl = LSPCON_PARADE_AVI_IF_KICKOFF | block_count;
<------><------>ret = drm_dp_dpcd_write(aux, reg, &avi_if_ctrl, 1);
<------><------>if (ret < 0) {
<------><------><------>DRM_ERROR("Failed to update (0x%x), block %d\n",
<------><------><------><------>  reg, block_count);
<------><------><------>return false;
<------><------>}
 
<------><------>block_count++;
<------>}
 
<------>DRM_DEBUG_KMS("Wrote AVI IF blocks successfully\n");
<------>return true;
}
 
static bool _lspcon_write_avi_infoframe_parade(struct drm_dp_aux *aux,
<------><------><------><------><------>       const u8 *frame,
<------><------><------><------><------>       ssize_t len)
{
<------>u8 avi_if[LSPCON_PARADE_AVI_IF_DATA_SIZE] = {1, };
 
<------>/*
<------> * Parade's frames contains 32 bytes of data, divided
<------> * into 4 frames:
<------> *	Token byte (first byte of first frame, must be non-zero)
<------> *	HB0 to HB2	 from AVI IF (3 bytes header)
<------> *	PB0 to PB27 from AVI IF (28 bytes data)
<------> * So it should look like this
<------> *	first block: | <token> <HB0-HB2> <DB0-DB3> |
<------> *	next 3 blocks: |<DB4-DB11>|<DB12-DB19>|<DB20-DB28>|
<------> */
 
<------>if (len > LSPCON_PARADE_AVI_IF_DATA_SIZE - 1) {
<------><------>DRM_ERROR("Invalid length of infoframes\n");
<------><------>return false;
<------>}
 
<------>memcpy(&avi_if[1], frame, len);
 
<------>if (!_lspcon_parade_write_infoframe_blocks(aux, avi_if)) {
<------><------>DRM_DEBUG_KMS("Failed to write infoframe blocks\n");
<------><------>return false;
<------>}
 
<------>return true;
}
 
static bool _lspcon_write_avi_infoframe_mca(struct drm_dp_aux *aux,
<------><------><------><------><------>    const u8 *buffer, ssize_t len)
{
<------>int ret;
<------>u32 val = 0;
<------>u32 retry;
<------>u16 reg;
<------>const u8 *data = buffer;
 
<------>reg = LSPCON_MCA_AVI_IF_WRITE_OFFSET;
<------>while (val < len) {
<------><------>/* DPCD write for AVI IF can fail on a slow FW day, so retry */
<------><------>for (retry = 0; retry < 5; retry++) {
<------><------><------>ret = drm_dp_dpcd_write(aux, reg, (void *)data, 1);
<------><------><------>if (ret == 1) {
<------><------><------><------>break;
<------><------><------>} else if (retry < 4) {
<------><------><------><------>mdelay(50);
<------><------><------><------>continue;
<------><------><------>} else {
<------><------><------><------>DRM_ERROR("DPCD write failed at:0x%x\n", reg);
<------><------><------><------>return false;
<------><------><------>}
<------><------>}
<------><------>val++; reg++; data++;
<------>}
 
<------>val = 0;
<------>reg = LSPCON_MCA_AVI_IF_CTRL;
<------>ret = drm_dp_dpcd_read(aux, reg, &val, 1);
<------>if (ret < 0) {
<------><------>DRM_ERROR("DPCD read failed, address 0x%x\n", reg);
<------><------>return false;
<------>}
 
<------>/* Indicate LSPCON chip about infoframe, clear bit 1 and set bit 0 */
<------>val &= ~LSPCON_MCA_AVI_IF_HANDLED;
<------>val |= LSPCON_MCA_AVI_IF_KICKOFF;
 
<------>ret = drm_dp_dpcd_write(aux, reg, &val, 1);
<------>if (ret < 0) {
<------><------>DRM_ERROR("DPCD read failed, address 0x%x\n", reg);
<------><------>return false;
<------>}
 
<------>val = 0;
<------>ret = drm_dp_dpcd_read(aux, reg, &val, 1);
<------>if (ret < 0) {
<------><------>DRM_ERROR("DPCD read failed, address 0x%x\n", reg);
<------><------>return false;
<------>}
 
<------>if (val == LSPCON_MCA_AVI_IF_HANDLED)
<------><------>DRM_DEBUG_KMS("AVI IF handled by FW\n");
 
<------>return true;
}
 
void lspcon_write_infoframe(struct intel_encoder *encoder,
<------><------><------>    const struct intel_crtc_state *crtc_state,
<------><------><------>    unsigned int type,
<------><------><------>    const void *frame, ssize_t len)
{
<------>bool ret;
<------>struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
<------>struct intel_lspcon *lspcon = enc_to_intel_lspcon(encoder);
 
<------>/* LSPCON only needs AVI IF */
<------>if (type != HDMI_INFOFRAME_TYPE_AVI)
<------><------>return;
 
<------>if (lspcon->vendor == LSPCON_VENDOR_MCA)
<------><------>ret = _lspcon_write_avi_infoframe_mca(&intel_dp->aux,
<------><------><------><------><------><------>      frame, len);
<------>else
<------><------>ret = _lspcon_write_avi_infoframe_parade(&intel_dp->aux,
<------><------><------><------><------><------><------> frame, len);
 
<------>if (!ret) {
<------><------>DRM_ERROR("Failed to write AVI infoframes\n");
<------><------>return;
<------>}
 
<------>DRM_DEBUG_DRIVER("AVI infoframes updated successfully\n");
}
 
void lspcon_read_infoframe(struct intel_encoder *encoder,
<------><------><------>   const struct intel_crtc_state *crtc_state,
<------><------><------>   unsigned int type,
<------><------><------>   void *frame, ssize_t len)
{
<------>/* FIXME implement this */
}
 
void lspcon_set_infoframes(struct intel_encoder *encoder,
<------><------><------>   bool enable,
<------><------><------>   const struct intel_crtc_state *crtc_state,
<------><------><------>   const struct drm_connector_state *conn_state)
{
<------>ssize_t ret;
<------>union hdmi_infoframe frame;
<------>u8 buf[VIDEO_DIP_DATA_SIZE];
<------>struct intel_digital_port *dig_port = enc_to_dig_port(encoder);
<------>struct intel_lspcon *lspcon = &dig_port->lspcon;
<------>const struct drm_display_mode *adjusted_mode =
<------><------>&crtc_state->hw.adjusted_mode;
 
<------>if (!lspcon->active) {
<------><------>DRM_ERROR("Writing infoframes while LSPCON disabled ?\n");
<------><------>return;
<------>}
 
<------>/* FIXME precompute infoframes */
 
<------>ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
<------><------><------><------><------><------>       conn_state->connector,
<------><------><------><------><------><------>       adjusted_mode);
<------>if (ret < 0) {
<------><------>DRM_ERROR("couldn't fill AVI infoframe\n");
<------><------>return;
<------>}
 
<------>if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR444) {
<------><------>if (crtc_state->lspcon_downsampling)
<------><------><------>frame.avi.colorspace = HDMI_COLORSPACE_YUV420;
<------><------>else
<------><------><------>frame.avi.colorspace = HDMI_COLORSPACE_YUV444;
<------>} else {
<------><------>frame.avi.colorspace = HDMI_COLORSPACE_RGB;
<------>}
 
<------>drm_hdmi_avi_infoframe_quant_range(&frame.avi,
<------><------><------><------><------>   conn_state->connector,
<------><------><------><------><------>   adjusted_mode,
<------><------><------><------><------>   crtc_state->limited_color_range ?
<------><------><------><------><------>   HDMI_QUANTIZATION_RANGE_LIMITED :
<------><------><------><------><------>   HDMI_QUANTIZATION_RANGE_FULL);
 
<------>ret = hdmi_infoframe_pack(&frame, buf, sizeof(buf));
<------>if (ret < 0) {
<------><------>DRM_ERROR("Failed to pack AVI IF\n");
<------><------>return;
<------>}
 
<------>dig_port->write_infoframe(encoder, crtc_state, HDMI_INFOFRAME_TYPE_AVI,
<------><------><------><------>  buf, ret);
}
 
u32 lspcon_infoframes_enabled(struct intel_encoder *encoder,
<------><------><------>      const struct intel_crtc_state *pipe_config)
{
<------>/* FIXME actually read this from the hw */
<------>return 0;
}
 
void lspcon_resume(struct intel_lspcon *lspcon)
{
<------>enum drm_lspcon_mode expected_mode;
 
<------>if (lspcon_wake_native_aux_ch(lspcon)) {
<------><------>expected_mode = DRM_LSPCON_MODE_PCON;
<------><------>lspcon_resume_in_pcon_wa(lspcon);
<------>} else {
<------><------>expected_mode = DRM_LSPCON_MODE_LS;
<------>}
 
<------>if (lspcon_wait_mode(lspcon, expected_mode) == DRM_LSPCON_MODE_PCON)
<------><------>return;
 
<------>if (lspcon_change_mode(lspcon, DRM_LSPCON_MODE_PCON))
<------><------>DRM_ERROR("LSPCON resume failed\n");
<------>else
<------><------>DRM_DEBUG_KMS("LSPCON resume success\n");
}
 
void lspcon_wait_pcon_mode(struct intel_lspcon *lspcon)
{
<------>lspcon_wait_mode(lspcon, DRM_LSPCON_MODE_PCON);
}
 
bool lspcon_init(struct intel_digital_port *dig_port)
{
<------>struct intel_dp *dp = &dig_port->dp;
<------>struct intel_lspcon *lspcon = &dig_port->lspcon;
<------>struct drm_device *dev = dig_port->base.base.dev;
<------>struct drm_i915_private *dev_priv = to_i915(dev);
<------>struct drm_connector *connector = &dp->attached_connector->base;
 
<------>if (!HAS_LSPCON(dev_priv)) {
<------><------>DRM_ERROR("LSPCON is not supported on this platform\n");
<------><------>return false;
<------>}
 
<------>lspcon->active = false;
<------>lspcon->mode = DRM_LSPCON_MODE_INVALID;
 
<------>if (!lspcon_probe(lspcon)) {
<------><------>DRM_ERROR("Failed to probe lspcon\n");
<------><------>return false;
<------>}
 
<------>if (drm_dp_read_dpcd_caps(&dp->aux, dp->dpcd) != 0) {
<------><------>DRM_ERROR("LSPCON DPCD read failed\n");
<------><------>return false;
<------>}
 
<------>if (!lspcon_detect_vendor(lspcon)) {
<------><------>DRM_ERROR("LSPCON vendor detection failed\n");
<------><------>return false;
<------>}
 
<------>connector->ycbcr_420_allowed = true;
<------>lspcon->active = true;
<------>DRM_DEBUG_KMS("Success: LSPCON init\n");
<------>return true;
}