/*
* Copyright (c) 2015, The Linux Foundation. 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 version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
#include "msm_kms.h"
#include "dsi.h"
struct msm_dsi_manager {
struct msm_dsi *dsi[DSI_MAX];
bool is_dual_panel;
bool is_sync_needed;
int master_panel_id;
};
static struct msm_dsi_manager msm_dsim_glb;
#define IS_DUAL_PANEL() (msm_dsim_glb.is_dual_panel)
#define IS_SYNC_NEEDED() (msm_dsim_glb.is_sync_needed)
#define IS_MASTER_PANEL(id) (msm_dsim_glb.master_panel_id == id)
static inline struct msm_dsi *dsi_mgr_get_dsi(int id)
{
return msm_dsim_glb.dsi[id];
}
static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id)
{
return msm_dsim_glb.dsi[(id + 1) % DSI_MAX];
}
static int dsi_mgr_parse_dual_panel(struct device_node *np, int id)
{
struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
/* We assume 2 dsi nodes have the same information of dual-panel and
* sync-mode, and only one node specifies master in case of dual mode.
*/
if (!msm_dsim->is_dual_panel)
msm_dsim->is_dual_panel = of_property_read_bool(
np, "qcom,dual-panel-mode");
if (msm_dsim->is_dual_panel) {
if (of_property_read_bool(np, "qcom,master-panel"))
msm_dsim->master_panel_id = id;
if (!msm_dsim->is_sync_needed)
msm_dsim->is_sync_needed = of_property_read_bool(
np, "qcom,sync-dual-panel");
}
return 0;
}
struct dsi_connector {
struct drm_connector base;
int id;
};
struct dsi_bridge {
struct drm_bridge base;
int id;
};
#define to_dsi_connector(x) container_of(x, struct dsi_connector, base)
#define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base)
static inline int dsi_mgr_connector_get_id(struct drm_connector *connector)
{
struct dsi_connector *dsi_connector = to_dsi_connector(connector);
return dsi_connector->id;
}
static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge)
{
struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge);
return dsi_bridge->id;
}
static enum drm_connector_status dsi_mgr_connector_detect(
struct drm_connector *connector, bool force)
{
int id = dsi_mgr_connector_get_id(connector);
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
struct msm_drm_private *priv = connector->dev->dev_private;
struct msm_kms *kms = priv->kms;
DBG("id=%d", id);
if (!msm_dsi->panel) {
msm_dsi->panel = msm_dsi_host_get_panel(msm_dsi->host,
&msm_dsi->panel_flags);
/* There is only 1 panel in the global panel list
* for dual panel mode. Therefore slave dsi should get
* the drm_panel instance from master dsi, and
* keep using the panel flags got from the current DSI link.
*/
if (!msm_dsi->panel && IS_DUAL_PANEL() &&
!IS_MASTER_PANEL(id) && other_dsi)
msm_dsi->panel = msm_dsi_host_get_panel(
other_dsi->host, NULL);
if (msm_dsi->panel && IS_DUAL_PANEL())
drm_object_attach_property(&connector->base,
connector->dev->mode_config.tile_property, 0);
/* Set split display info to kms once dual panel is connected
* to both hosts
*/
if (msm_dsi->panel && IS_DUAL_PANEL() &&
other_dsi && other_dsi->panel) {
bool cmd_mode = !(msm_dsi->panel_flags &
MIPI_DSI_MODE_VIDEO);
struct drm_encoder *encoder = msm_dsi_get_encoder(
dsi_mgr_get_dsi(DSI_ENCODER_MASTER));
struct drm_encoder *slave_enc = msm_dsi_get_encoder(
dsi_mgr_get_dsi(DSI_ENCODER_SLAVE));
if (kms->funcs->set_split_display)
kms->funcs->set_split_display(kms, encoder,
slave_enc, cmd_mode);
else
pr_err("mdp does not support dual panel\n");
}
}
return msm_dsi->panel ? connector_status_connected :
connector_status_disconnected;
}
static void dsi_mgr_connector_destroy(struct drm_connector *connector)
{
DBG("");
drm_connector_unregister(connector);
drm_connector_cleanup(connector);
}
static void dsi_dual_connector_fix_modes(struct drm_connector *connector)
{
struct drm_display_mode *mode, *m;
/* Only support left-right mode */
list_for_each_entry_safe(mode, m, &connector->probed_modes, head) {
mode->clock >>= 1;
mode->hdisplay >>= 1;
mode->hsync_start >>= 1;
mode->hsync_end >>= 1;
mode->htotal >>= 1;
drm_mode_set_name(mode);
}
}
static int dsi_dual_connector_tile_init(
struct drm_connector *connector, int id)
{
struct drm_display_mode *mode;
/* Fake topology id */
char topo_id[8] = {'M', 'S', 'M', 'D', 'U', 'D', 'S', 'I'};
if (connector->tile_group) {
DBG("Tile property has been initialized");
return 0;
}
/* Use the first mode only for now */
mode = list_first_entry(&connector->probed_modes,
struct drm_display_mode,
head);
if (!mode)
return -EINVAL;
connector->tile_group = drm_mode_get_tile_group(
connector->dev, topo_id);
if (!connector->tile_group)
connector->tile_group = drm_mode_create_tile_group(
connector->dev, topo_id);
if (!connector->tile_group) {
pr_err("%s: failed to create tile group\n", __func__);
return -ENOMEM;
}
connector->has_tile = true;
connector->tile_is_single_monitor = true;
/* mode has been fixed */
connector->tile_h_size = mode->hdisplay;
connector->tile_v_size = mode->vdisplay;
/* Only support left-right mode */
connector->num_h_tile = 2;
connector->num_v_tile = 1;
connector->tile_v_loc = 0;
connector->tile_h_loc = (id == DSI_RIGHT) ? 1 : 0;
return 0;
}
static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
{
int id = dsi_mgr_connector_get_id(connector);
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct drm_panel *panel = msm_dsi->panel;
int ret, num;
if (!panel)
return 0;
/* Since we have 2 connectors, but only 1 drm_panel in dual DSI mode,
* panel should not attach to any connector.
* Only temporarily attach panel to the current connector here,
* to let panel set mode to this connector.
*/
drm_panel_attach(panel, connector);
num = drm_panel_get_modes(panel);
drm_panel_detach(panel);
if (!num)
return 0;
if (IS_DUAL_PANEL()) {
/* report half resolution to user */
dsi_dual_connector_fix_modes(connector);
ret = dsi_dual_connector_tile_init(connector, id);
if (ret)
return ret;
ret = drm_mode_connector_set_tile_property(connector);
if (ret) {
pr_err("%s: set tile property failed, %d\n",
__func__, ret);
return ret;
}
}
return num;
}
static int dsi_mgr_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
int id = dsi_mgr_connector_get_id(connector);
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
struct msm_drm_private *priv = connector->dev->dev_private;
struct msm_kms *kms = priv->kms;
long actual, requested;
DBG("");
requested = 1000 * mode->clock;
actual = kms->funcs->round_pixclk(kms, requested, encoder);
DBG("requested=%ld, actual=%ld", requested, actual);
if (actual != requested)
return MODE_CLOCK_RANGE;
return MODE_OK;
}
static struct drm_encoder *
dsi_mgr_connector_best_encoder(struct drm_connector *connector)
{
int id = dsi_mgr_connector_get_id(connector);
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
DBG("");
return msm_dsi_get_encoder(msm_dsi);
}
static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
{
int id = dsi_mgr_bridge_get_id(bridge);
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
struct mipi_dsi_host *host = msm_dsi->host;
struct drm_panel *panel = msm_dsi->panel;
bool is_dual_panel = IS_DUAL_PANEL();
int ret;
DBG("id=%d", id);
if (!panel || (is_dual_panel && (DSI_1 == id)))
return;
ret = msm_dsi_host_power_on(host);
if (ret) {
pr_err("%s: power on host %d failed, %d\n", __func__, id, ret);
goto host_on_fail;
}
if (is_dual_panel && msm_dsi1) {
ret = msm_dsi_host_power_on(msm_dsi1->host);
if (ret) {
pr_err("%s: power on host1 failed, %d\n",
__func__, ret);
goto host1_on_fail;
}
}
/* Always call panel functions once, because even for dual panels,
* there is only one drm_panel instance.
*/
ret = drm_panel_prepare(panel);
if (ret) {
pr_err("%s: prepare panel %d failed, %d\n", __func__, id, ret);
goto panel_prep_fail;
}
ret = msm_dsi_host_enable(host);
if (ret) {
pr_err("%s: enable host %d failed, %d\n", __func__, id, ret);
goto host_en_fail;
}
if (is_dual_panel && msm_dsi1) {
ret = msm_dsi_host_enable(msm_dsi1->host);
if (ret) {
pr_err("%s: enable host1 failed, %d\n", __func__, ret);
goto host1_en_fail;
}
}
ret = drm_panel_enable(panel);
if (ret) {
pr_err("%s: enable panel %d failed, %d\n", __func__, id, ret);
goto panel_en_fail;
}
return;
panel_en_fail:
if (is_dual_panel && msm_dsi1)
msm_dsi_host_disable(msm_dsi1->host);
host1_en_fail:
msm_dsi_host_disable(host);
host_en_fail:
drm_panel_unprepare(panel);
panel_prep_fail:
if (is_dual_panel && msm_dsi1)
msm_dsi_host_power_off(msm_dsi1->host);
host1_on_fail:
msm_dsi_host_power_off(host);
host_on_fail:
return;
}
static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
{
DBG("");
}
static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
{
DBG("");
}
static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
{
int id = dsi_mgr_bridge_get_id(bridge);
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1);
struct mipi_dsi_host *host = msm_dsi->host;
struct drm_panel *panel = msm_dsi->panel;
bool is_dual_panel = IS_DUAL_PANEL();
int ret;
DBG("id=%d", id);
if (!panel || (is_dual_panel && (DSI_1 == id)))
return;
ret = drm_panel_disable(panel);
if (ret)
pr_err("%s: Panel %d OFF failed, %d\n", __func__, id, ret);
ret = msm_dsi_host_disable(host);
if (ret)
pr_err("%s: host %d disable failed, %d\n", __func__, id, ret);
if (is_dual_panel && msm_dsi1) {
ret = msm_dsi_host_disable(msm_dsi1->host);
if (ret)
pr_err("%s: host1 disable failed, %d\n", __func__, ret);
}
ret = drm_panel_unprepare(panel);
if (ret)
pr_err("%s: Panel %d unprepare failed,%d\n", __func__, id, ret);
ret = msm_dsi_host_power_off(host);
if (ret)
pr_err("%s: host %d power off failed,%d\n", __func__, id, ret);
if (is_dual_panel && msm_dsi1) {
ret = msm_dsi_host_power_off(msm_dsi1->host);
if (ret)
pr_err("%s: host1 power off failed, %d\n",
__func__, ret);
}
}
static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
int id = dsi_mgr_bridge_get_id(bridge);
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
struct mipi_dsi_host *host = msm_dsi->host;
bool is_dual_panel = IS_DUAL_PANEL();
DBG("set mode: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x",
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);
if (is_dual_panel && (DSI_1 == id))
return;
msm_dsi_host_set_display_mode(host, adjusted_mode);
if (is_dual_panel && other_dsi)
msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode);
}
static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
.dpms = drm_atomic_helper_connector_dpms,
.detect = dsi_mgr_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = dsi_mgr_connector_destroy,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
.get_modes = dsi_mgr_connector_get_modes,
.mode_valid = dsi_mgr_connector_mode_valid,
.best_encoder = dsi_mgr_connector_best_encoder,
};
static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = {
.pre_enable = dsi_mgr_bridge_pre_enable,
.enable = dsi_mgr_bridge_enable,
.disable = dsi_mgr_bridge_disable,
.post_disable = dsi_mgr_bridge_post_disable,
.mode_set = dsi_mgr_bridge_mode_set,
};
/* initialize connector */
struct drm_connector *msm_dsi_manager_connector_init(u8 id)
{
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct drm_connector *connector = NULL;
struct dsi_connector *dsi_connector;
int ret, i;
dsi_connector = devm_kzalloc(msm_dsi->dev->dev,
sizeof(*dsi_connector), GFP_KERNEL);
if (!dsi_connector) {
ret = -ENOMEM;
goto fail;
}
dsi_connector->id = id;
connector = &dsi_connector->base;
ret = drm_connector_init(msm_dsi->dev, connector,
&dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI);
if (ret)
goto fail;
drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs);
/* Enable HPD to let hpd event is handled
* when panel is attached to the host.
*/
connector->polled = DRM_CONNECTOR_POLL_HPD;
/* Display driver doesn't support interlace now. */
connector->interlace_allowed = 0;
connector->doublescan_allowed = 0;
ret = drm_connector_register(connector);
if (ret)
goto fail;
for (i = 0; i < MSM_DSI_ENCODER_NUM; i++)
drm_mode_connector_attach_encoder(connector,
msm_dsi->encoders[i]);
return connector;
fail:
if (connector)
dsi_mgr_connector_destroy(connector);
return ERR_PTR(ret);
}
/* initialize bridge */
struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
{
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct drm_bridge *bridge = NULL;
struct dsi_bridge *dsi_bridge;
int ret;
dsi_bridge = devm_kzalloc(msm_dsi->dev->dev,
sizeof(*dsi_bridge), GFP_KERNEL);
if (!dsi_bridge) {
ret = -ENOMEM;
goto fail;
}
dsi_bridge->id = id;
bridge = &dsi_bridge->base;
bridge->funcs = &dsi_mgr_bridge_funcs;
ret = drm_bridge_attach(msm_dsi->dev, bridge);
if (ret)
goto fail;
return bridge;
fail:
if (bridge)
msm_dsi_manager_bridge_destroy(bridge);
return ERR_PTR(ret);
}
void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)
{
}
int msm_dsi_manager_phy_enable(int id,
const unsigned long bit_rate, const unsigned long esc_rate,
u32 *clk_pre, u32 *clk_post)
{
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct msm_dsi_phy *phy = msm_dsi->phy;
int ret;
ret = msm_dsi_phy_enable(phy, IS_DUAL_PANEL(), bit_rate, esc_rate);
if (ret)
return ret;
msm_dsi->phy_enabled = true;
msm_dsi_phy_get_clk_pre_post(phy, clk_pre, clk_post);
return 0;
}
void msm_dsi_manager_phy_disable(int id)
{
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER);
struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE);
struct msm_dsi_phy *phy = msm_dsi->phy;
/* disable DSI phy
* In dual-dsi configuration, the phy should be disabled for the
* first controller only when the second controller is disabled.
*/
msm_dsi->phy_enabled = false;
if (IS_DUAL_PANEL() && mdsi && sdsi) {
if (!mdsi->phy_enabled && !sdsi->phy_enabled) {
msm_dsi_phy_disable(sdsi->phy);
msm_dsi_phy_disable(mdsi->phy);
}
} else {
msm_dsi_phy_disable(phy);
}
}
int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg)
{
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
struct mipi_dsi_host *host = msm_dsi->host;
bool is_read = (msg->rx_buf && msg->rx_len);
bool need_sync = (IS_SYNC_NEEDED() && !is_read);
int ret;
if (!msg->tx_buf || !msg->tx_len)
return 0;
/* In dual master case, panel requires the same commands sent to
* both DSI links. Host issues the command trigger to both links
* when DSI_1 calls the cmd transfer function, no matter it happens
* before or after DSI_0 cmd transfer.
*/
if (need_sync && (id == DSI_0))
return is_read ? msg->rx_len : msg->tx_len;
if (need_sync && msm_dsi0) {
ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg);
if (ret) {
pr_err("%s: failed to prepare non-trigger host, %d\n",
__func__, ret);
return ret;
}
}
ret = msm_dsi_host_xfer_prepare(host, msg);
if (ret) {
pr_err("%s: failed to prepare host, %d\n", __func__, ret);
goto restore_host0;
}
ret = is_read ? msm_dsi_host_cmd_rx(host, msg) :
msm_dsi_host_cmd_tx(host, msg);
msm_dsi_host_xfer_restore(host, msg);
restore_host0:
if (need_sync && msm_dsi0)
msm_dsi_host_xfer_restore(msm_dsi0->host, msg);
return ret;
}
bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 iova, u32 len)
{
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0);
struct mipi_dsi_host *host = msm_dsi->host;
if (IS_SYNC_NEEDED() && (id == DSI_0))
return false;
if (IS_SYNC_NEEDED() && msm_dsi0)
msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, iova, len);
msm_dsi_host_cmd_xfer_commit(host, iova, len);
return true;
}
int msm_dsi_manager_register(struct msm_dsi *msm_dsi)
{
struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
int id = msm_dsi->id;
struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id);
int ret;
if (id > DSI_MAX) {
pr_err("%s: invalid id %d\n", __func__, id);
return -EINVAL;
}
if (msm_dsim->dsi[id]) {
pr_err("%s: dsi%d already registered\n", __func__, id);
return -EBUSY;
}
msm_dsim->dsi[id] = msm_dsi;
ret = dsi_mgr_parse_dual_panel(msm_dsi->pdev->dev.of_node, id);
if (ret) {
pr_err("%s: failed to parse dual panel info\n", __func__);
return ret;
}
if (!IS_DUAL_PANEL()) {
ret = msm_dsi_host_register(msm_dsi->host, true);
} else if (!other_dsi) {
return 0;
} else {
struct msm_dsi *mdsi = IS_MASTER_PANEL(id) ?
msm_dsi : other_dsi;
struct msm_dsi *sdsi = IS_MASTER_PANEL(id) ?
other_dsi : msm_dsi;
/* Register slave host first, so that slave DSI device
* has a chance to probe, and do not block the master
* DSI device's probe.
* Also, do not check defer for the slave host,
* because only master DSI device adds the panel to global
* panel list. The panel's device is the master DSI device.
*/
ret = msm_dsi_host_register(sdsi->host, false);
if (ret)
return ret;
ret = msm_dsi_host_register(mdsi->host, true);
}
return ret;
}
void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi)
{
struct msm_dsi_manager *msm_dsim = &msm_dsim_glb;
if (msm_dsi->host)
msm_dsi_host_unregister(msm_dsi->host);
msm_dsim->dsi[msm_dsi->id] = NULL;
}
