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drm/msm/dsi: switch to DRM_PANEL_BRIDGE 

Currently the DSI driver has two separate paths: one if the next device
in a chain is a bridge and another one if the panel is connected
directly to the DSI host. Simplify the code path by using panel-bridge
driver (already selected in Kconfig) and dropping support for
handling the panel directly.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/493608/
Link: https://lore.kernel.org/r/20220712132258.671263-1-dmitry.baryshkov@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Dmitry Baryshkov 2022-07-12 16:22:58 +03:00 committed by Rob Clark
parent 549eae2774
commit 007ac0262b
4 changed files with 36 additions and 323 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
drivers/gpu/drm/msm/dsi/dsi.c
View File

@ -6,14 +6,6 @@
#include "dsi.h"
#include "dsi_cfg.h"
struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
{
if (!msm_dsi || !msm_dsi_device_connected(msm_dsi))
return NULL;
return msm_dsi->encoder;
}
bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi)
{
unsigned long host_flags = msm_dsi_host_get_mode_flags(msm_dsi->host);
@ -220,7 +212,6 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
struct drm_encoder *encoder)
{
struct msm_drm_private *priv;
struct drm_bridge *ext_bridge;
int ret;
if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev))
@ -254,26 +245,10 @@ int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
goto fail;
}
/*
* check if the dsi encoder output is connected to a panel or an
* external bridge. We create a connector only if we're connected to a
* drm_panel device. When we're connected to an external bridge, we
* assume that the drm_bridge driver will create the connector itself.
*/
ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
if (ext_bridge)
msm_dsi->connector =
msm_dsi_manager_ext_bridge_init(msm_dsi->id);
else
msm_dsi->connector =
msm_dsi_manager_connector_init(msm_dsi->id);
if (IS_ERR(msm_dsi->connector)) {
ret = PTR_ERR(msm_dsi->connector);
ret = msm_dsi_manager_ext_bridge_init(msm_dsi->id);
if (ret) {
DRM_DEV_ERROR(dev->dev,
"failed to create dsi connector: %d\n", ret);
msm_dsi->connector = NULL;
goto fail;
}
@ -287,12 +262,6 @@ fail:
msm_dsi->bridge = NULL;
}
/* don't destroy connector if we didn't make it */
if (msm_dsi->connector && !msm_dsi->external_bridge)
msm_dsi->connector->funcs->destroy(msm_dsi->connector);
msm_dsi->connector = NULL;
return ret;
}

16
drivers/gpu/drm/msm/dsi/dsi.h
View File

@ -12,7 +12,6 @@
#include <drm/drm_bridge.h>
#include <drm/drm_crtc.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_panel.h>
#include "msm_drv.h"
#include "disp/msm_disp_snapshot.h"
@ -36,8 +35,6 @@ struct msm_dsi {
struct drm_device *dev;
struct platform_device *pdev;
/* connector managed by us when we're connected to a drm_panel */
struct drm_connector *connector;
/* internal dsi bridge attached to MDP interface */
struct drm_bridge *bridge;
@ -45,10 +42,8 @@ struct msm_dsi {
struct msm_dsi_phy *phy;
/*
* panel/external_bridge connected to dsi bridge output, only one of the
* two can be valid at a time
* external_bridge connected to dsi bridge output
*/
struct drm_panel *panel;
struct drm_bridge *external_bridge;
struct device *phy_dev;
@ -63,8 +58,7 @@ struct msm_dsi {
/* dsi manager */
struct drm_bridge *msm_dsi_manager_bridge_init(u8 id);
void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge);
struct drm_connector *msm_dsi_manager_connector_init(u8 id);
struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id);
int msm_dsi_manager_ext_bridge_init(u8 id);
int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg);
bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 dma_base, u32 len);
int msm_dsi_manager_register(struct msm_dsi *msm_dsi);
@ -74,11 +68,9 @@ void msm_dsi_manager_tpg_enable(void);
/* msm dsi */
static inline bool msm_dsi_device_connected(struct msm_dsi *msm_dsi)
{
return msm_dsi->panel || msm_dsi->external_bridge;
return msm_dsi->external_bridge;
}
struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
/* dsi host */
struct msm_dsi_host;
int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
@ -103,9 +95,7 @@ int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
const struct drm_display_mode *mode);
enum drm_mode_status msm_dsi_host_check_dsc(struct mipi_dsi_host *host,
const struct drm_display_mode *mode);
struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host);
unsigned long msm_dsi_host_get_mode_flags(struct mipi_dsi_host *host);
struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host);
int msm_dsi_host_register(struct mipi_dsi_host *host);
void msm_dsi_host_unregister(struct mipi_dsi_host *host);
void msm_dsi_host_set_phy_mode(struct mipi_dsi_host *host,

25
drivers/gpu/drm/msm/dsi/dsi_host.c
View File

@ -163,7 +163,6 @@ struct msm_dsi_host {
struct drm_dsc_config *dsc;
/* connected device info */
struct device_node *device_node;
unsigned int channel;
unsigned int lanes;
enum mipi_dsi_pixel_format format;
@ -1628,8 +1627,6 @@ static int dsi_host_detach(struct mipi_dsi_host *host,
dsi_dev_detach(msm_host->pdev);
msm_host->device_node = NULL;
DBG("id=%d", msm_host->id);
return 0;
@ -1893,16 +1890,6 @@ static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
goto err;
}
/* Get panel node from the output port's endpoint data */
device_node = of_graph_get_remote_node(np, 1, 0);
if (!device_node) {
DRM_DEV_DEBUG(dev, "%s: no valid device\n", __func__);
ret = -ENODEV;
goto err;
}
msm_host->device_node = device_node;
if (of_property_read_bool(np, "syscon-sfpb")) {
msm_host->sfpb = syscon_regmap_lookup_by_phandle(np,
"syscon-sfpb");
@ -2587,23 +2574,11 @@ enum drm_mode_status msm_dsi_host_check_dsc(struct mipi_dsi_host *host,
return MODE_OK;
}
struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host)
{
return of_drm_find_panel(to_msm_dsi_host(host)->device_node);
}
unsigned long msm_dsi_host_get_mode_flags(struct mipi_dsi_host *host)
{
return to_msm_dsi_host(host)->mode_flags;
}
struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
return of_drm_find_bridge(msm_host->device_node);
}
void msm_dsi_host_snapshot(struct msm_disp_state *disp_state, struct mipi_dsi_host *host)
{
struct msm_dsi_host *msm_host = to_msm_dsi_host(host);

283
drivers/gpu/drm/msm/dsi/dsi_manager.c
View File

@ -211,39 +211,26 @@ static void dsi_mgr_phy_disable(int id)
}
}
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 int msm_dsi_manager_panel_init(struct drm_connector *conn, u8 id)
static void msm_dsi_manager_set_split_display(u8 id)
{
struct msm_drm_private *priv = conn->dev->dev_private;
struct msm_kms *kms = priv->kms;
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 = msm_dsi->dev->dev_private;
struct msm_kms *kms = priv->kms;
struct msm_dsi *master_dsi, *slave_dsi;
struct drm_panel *panel;
if (IS_BONDED_DSI() && !IS_MASTER_DSI_LINK(id)) {
master_dsi = other_dsi;
@ -253,89 +240,18 @@ static int msm_dsi_manager_panel_init(struct drm_connector *conn, u8 id)
slave_dsi = other_dsi;
}
/*
* There is only 1 panel in the global panel list for bonded DSI mode.
* Therefore slave dsi should get the drm_panel instance from master
* dsi.
*/
panel = msm_dsi_host_get_panel(master_dsi->host);
if (IS_ERR(panel)) {
DRM_ERROR("Could not find panel for %u (%ld)\n", msm_dsi->id,
PTR_ERR(panel));
return PTR_ERR(panel);
}
if (!panel || !IS_BONDED_DSI())
goto out;
drm_object_attach_property(&conn->base,
conn->dev->mode_config.tile_property, 0);
if (!msm_dsi->external_bridge || !IS_BONDED_DSI())
return;
/*
* Set split display info to kms once bonded DSI panel is connected to
* both hosts.
*/
if (other_dsi && other_dsi->panel && kms->funcs->set_split_display) {
if (other_dsi && other_dsi->external_bridge && kms->funcs->set_split_display) {
kms->funcs->set_split_display(kms, master_dsi->encoder,
slave_dsi->encoder,
msm_dsi_is_cmd_mode(msm_dsi));
}
out:
msm_dsi->panel = panel;
return 0;
}
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);
return msm_dsi->panel ? connector_status_connected :
connector_status_disconnected;
}
static void dsi_mgr_connector_destroy(struct drm_connector *connector)
{
struct dsi_connector *dsi_connector = to_dsi_connector(connector);
DBG("");
drm_connector_cleanup(connector);
kfree(dsi_connector);
}
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 num;
if (!panel)
return 0;
/*
* In bonded DSI mode, we have one connector that can be
* attached to the drm_panel.
*/
num = drm_panel_get_modes(panel, connector);
if (!num)
return 0;
return num;
}
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_power_on(struct drm_bridge *bridge)
@ -400,7 +316,6 @@ static void dsi_mgr_bridge_pre_enable(struct drm_bridge *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_bonded_dsi = IS_BONDED_DSI();
int ret;
@ -415,18 +330,6 @@ static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
if (!dsi_mgr_power_on_early(bridge))
dsi_mgr_bridge_power_on(bridge);
/* Always call panel functions once, because even for dual panels,
* there is only one drm_panel instance.
*/
if (panel) {
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);
@ -446,9 +349,6 @@ static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge)
host1_en_fail:
msm_dsi_host_disable(host);
host_en_fail:
if (panel)
drm_panel_unprepare(panel);
panel_prep_fail:
return;
}
@ -466,62 +366,12 @@ void msm_dsi_manager_tpg_enable(void)
}
}
static void dsi_mgr_bridge_enable(struct drm_bridge *bridge)
{
int id = dsi_mgr_bridge_get_id(bridge);
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct drm_panel *panel = msm_dsi->panel;
bool is_bonded_dsi = IS_BONDED_DSI();
int ret;
DBG("id=%d", id);
if (!msm_dsi_device_connected(msm_dsi))
return;
/* Do nothing with the host if it is slave-DSI in case of bonded DSI */
if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
return;
if (panel) {
ret = drm_panel_enable(panel);
if (ret) {
pr_err("%s: enable panel %d failed, %d\n", __func__, id,
ret);
}
}
}
static void dsi_mgr_bridge_disable(struct drm_bridge *bridge)
{
int id = dsi_mgr_bridge_get_id(bridge);
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct drm_panel *panel = msm_dsi->panel;
bool is_bonded_dsi = IS_BONDED_DSI();
int ret;
DBG("id=%d", id);
if (!msm_dsi_device_connected(msm_dsi))
return;
/* Do nothing with the host if it is slave-DSI in case of bonded DSI */
if (is_bonded_dsi && !IS_MASTER_DSI_LINK(id))
return;
if (panel) {
ret = drm_panel_disable(panel);
if (ret)
pr_err("%s: Panel %d OFF failed, %d\n", __func__, id,
ret);
}
}
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_bonded_dsi = IS_BONDED_DSI();
int ret;
@ -548,13 +398,6 @@ static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge)
pr_err("%s: host1 disable failed, %d\n", __func__, ret);
}
if (panel) {
ret = drm_panel_unprepare(panel);
if (ret)
pr_err("%s: Panel %d unprepare failed,%d\n", __func__,
id, ret);
}
msm_dsi_host_disable_irq(host);
if (is_bonded_dsi && msm_dsi1)
msm_dsi_host_disable_irq(msm_dsi1->host);
@ -611,76 +454,13 @@ static enum drm_mode_status dsi_mgr_bridge_mode_valid(struct drm_bridge *bridge,
return msm_dsi_host_check_dsc(host, mode);
}
static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
.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,
.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,
.mode_valid = dsi_mgr_bridge_mode_valid,
};
/* initialize connector when we're connected to a drm_panel */
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;
dsi_connector = kzalloc(sizeof(*dsi_connector), GFP_KERNEL);
if (!dsi_connector)
return ERR_PTR(-ENOMEM);
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)
return ERR_PTR(ret);
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;
drm_connector_attach_encoder(connector, msm_dsi->encoder);
ret = msm_dsi_manager_panel_init(connector, id);
if (ret) {
DRM_DEV_ERROR(msm_dsi->dev->dev, "init panel failed %d\n", ret);
goto fail;
}
return connector;
fail:
connector->funcs->destroy(connector);
return ERR_PTR(ret);
}
/* initialize bridge */
struct drm_bridge *msm_dsi_manager_bridge_init(u8 id)
{
@ -719,18 +499,21 @@ fail:
return ERR_PTR(ret);
}
struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
int msm_dsi_manager_ext_bridge_init(u8 id)
{
struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
struct drm_device *dev = msm_dsi->dev;
struct drm_connector *connector;
struct drm_encoder *encoder;
struct drm_bridge *int_bridge, *ext_bridge;
int ret;
int_bridge = msm_dsi->bridge;
ext_bridge = msm_dsi->external_bridge =
msm_dsi_host_get_bridge(msm_dsi->host);
ext_bridge = devm_drm_of_get_bridge(&msm_dsi->pdev->dev,
msm_dsi->pdev->dev.of_node, 1, 0);
if (IS_ERR(ext_bridge))
return PTR_ERR(ext_bridge);
msm_dsi->external_bridge = ext_bridge;
encoder = msm_dsi->encoder;
@ -742,36 +525,32 @@ struct drm_connector *msm_dsi_manager_ext_bridge_init(u8 id)
ret = drm_bridge_attach(encoder, ext_bridge, int_bridge,
DRM_BRIDGE_ATTACH_NO_CONNECTOR);
if (ret == -EINVAL) {
struct drm_connector *connector;
struct list_head *connector_list;
/* link the internal dsi bridge to the external bridge */
drm_bridge_attach(encoder, ext_bridge, int_bridge, 0);
/*
* we need the drm_connector created by the external bridge
* driver (or someone else) to feed it to our driver's
* priv->connector[] list, mainly for msm_fbdev_init()
* link the internal dsi bridge to the external bridge,
* connector is created by the next bridge.
*/
connector_list = &dev->mode_config.connector_list;
ret = drm_bridge_attach(encoder, ext_bridge, int_bridge, 0);
if (ret < 0)
return ret;
} else {
struct drm_connector *connector;
list_for_each_entry(connector, connector_list, head) {
if (drm_connector_has_possible_encoder(connector, encoder))
return connector;
/* We are in charge of the connector, create one now. */
connector = drm_bridge_connector_init(dev, encoder);
if (IS_ERR(connector)) {
DRM_ERROR("Unable to create bridge connector\n");
return PTR_ERR(connector);
}
return ERR_PTR(-ENODEV);
ret = drm_connector_attach_encoder(connector, encoder);
if (ret < 0)
return ret;
}
connector = drm_bridge_connector_init(dev, encoder);
if (IS_ERR(connector)) {
DRM_ERROR("Unable to create bridge connector\n");
return ERR_CAST(connector);
}
/* The pipeline is ready, ping encoders if necessary */
msm_dsi_manager_set_split_display(id);
drm_connector_attach_encoder(connector, encoder);
return connector;
return 0;
}
void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge)