[RFCv1 12/42] drm/omap: dsi: introduce mipi_dsi_host

This moves from custom platform driver infrastructure to mipi_dsi_host and mipi_dsi_device. Note, that this is a graduate step and the driver only uses the devices types and transfer function, but not yet the new device binding style or drm_panel.

Signed-off-by: Sebastian Reichel sebastian.reichel@collabora.com --- .../gpu/drm/omapdrm/displays/panel-dsi-cm.c | 119 +++++++++--------- drivers/gpu/drm/omapdrm/dss/dsi.c | 54 ++++++-- drivers/gpu/drm/omapdrm/dss/omapdss.h | 4 - 3 files changed, 102 insertions(+), 75 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c index b505bfd221fc..e2e56cc1cd61 100644 --- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c +++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c @@ -14,7 +14,6 @@ #include <linux/interrupt.h> #include <linux/jiffies.h> #include <linux/module.h> -#include <linux/platform_device.h> #include <linux/sched/signal.h> #include <linux/slab.h> #include <linux/workqueue.h> @@ -39,13 +38,13 @@ #define DCS_GET_ID3 0xdc

struct panel_drv_data { + struct mipi_dsi_device *dsi; + struct omap_dss_device dssdev; struct omap_dss_device *src;

struct videomode vm;

- struct platform_device *pdev; - struct mutex lock;

struct backlight_device *bldev; @@ -139,7 +138,7 @@ static void hw_guard_wait(struct panel_drv_data *ddata)

static int dsicm_dcs_read_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 *data) { - struct omap_dss_device *src = ddata->src; + struct mipi_dsi_device *dsi = ddata->dsi; const struct mipi_dsi_msg msg = { .channel = ddata->channel, .type = MIPI_DSI_DCS_READ, @@ -149,12 +148,12 @@ static int dsicm_dcs_read_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 *data) .rx_buf = data };

- return src->ops->dsi.transfer(src, &msg); + return dsi->host->ops->transfer(dsi->host, &msg); }

static int dsicm_dcs_write_0(struct panel_drv_data *ddata, u8 dcs_cmd) { - struct omap_dss_device *src = ddata->src; + struct mipi_dsi_device *dsi = ddata->dsi; const struct mipi_dsi_msg msg = { .channel = ddata->channel, .type = MIPI_DSI_DCS_SHORT_WRITE, @@ -162,12 +161,12 @@ static int dsicm_dcs_write_0(struct panel_drv_data *ddata, u8 dcs_cmd) .tx_len = 1, };

- return src->ops->dsi.transfer(src, &msg); + return dsi->host->ops->transfer(dsi->host, &msg); }

static int dsicm_dcs_write_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 param) { - struct omap_dss_device *src = ddata->src; + struct mipi_dsi_device *dsi = ddata->dsi; const u8 buf[] = { dcs_cmd, param }; const struct mipi_dsi_msg msg = { .channel = ddata->channel, @@ -176,13 +175,13 @@ static int dsicm_dcs_write_1(struct panel_drv_data *ddata, u8 dcs_cmd, u8 param) .tx_len = 2, };

- return src->ops->dsi.transfer(src, &msg); + return dsi->host->ops->transfer(dsi->host, &msg); }

static int dsicm_sleep_in(struct panel_drv_data *ddata)

{ - struct omap_dss_device *src = ddata->src; + struct mipi_dsi_device *dsi = ddata->dsi; int r; const u8 cmd = MIPI_DCS_ENTER_SLEEP_MODE; const struct mipi_dsi_msg msg = { @@ -194,7 +193,7 @@ static int dsicm_sleep_in(struct panel_drv_data *ddata)

hw_guard_wait(ddata);

- r = src->ops->dsi.transfer(src, &msg); + r = dsi->host->ops->transfer(dsi->host, &msg); if (r) return r;

@@ -242,7 +241,7 @@ static int dsicm_get_id(struct panel_drv_data *ddata, u8 *id1, u8 *id2, u8 *id3) static int dsicm_set_update_window(struct panel_drv_data *ddata, u16 x, u16 y, u16 w, u16 h) { - struct omap_dss_device *src = ddata->src; + struct mipi_dsi_device *dsi = ddata->dsi; int r; u16 x1 = x; u16 x2 = x + w - 1; @@ -280,11 +279,11 @@ static int dsicm_set_update_window(struct panel_drv_data *ddata, };

- r = src->ops->dsi.transfer(src, &msgX); + r = dsi->host->ops->transfer(dsi->host, &msgX); if (r) return r;

- r = src->ops->dsi.transfer(src, &msgY); + r = dsi->host->ops->transfer(dsi->host, &msgY); if (r) return r;

@@ -327,7 +326,7 @@ static int dsicm_enter_ulps(struct panel_drv_data *ddata) return 0;

err: - dev_err(&ddata->pdev->dev, "enter ULPS failed"); + dev_err(&ddata->dsi->dev, "enter ULPS failed"); dsicm_panel_reset(ddata);

ddata->ulps_enabled = false; @@ -350,7 +349,7 @@ static int dsicm_exit_ulps(struct panel_drv_data *ddata)

r = _dsicm_enable_te(ddata, true); if (r) { - dev_err(&ddata->pdev->dev, "failed to re-enable TE"); + dev_err(&ddata->dsi->dev, "failed to re-enable TE"); goto err2; }

@@ -364,7 +363,7 @@ static int dsicm_exit_ulps(struct panel_drv_data *ddata) return 0;

err2: - dev_err(&ddata->pdev->dev, "failed to exit ULPS"); + dev_err(&ddata->dsi->dev, "failed to exit ULPS");

r = dsicm_panel_reset(ddata); if (!r) { @@ -401,7 +400,7 @@ static int dsicm_bl_update_status(struct backlight_device *dev) else level = 0;

- dev_dbg(&ddata->pdev->dev, "update brightness to %d\n", level); + dev_dbg(&ddata->dsi->dev, "update brightness to %d\n", level);

mutex_lock(&ddata->lock);

@@ -638,7 +637,7 @@ static int dsicm_power_on(struct panel_drv_data *ddata) if (ddata->vpnl) { r = regulator_enable(ddata->vpnl); if (r) { - dev_err(&ddata->pdev->dev, + dev_err(&ddata->dsi->dev, "failed to enable VPNL: %d\n", r); return r; } @@ -647,7 +646,7 @@ static int dsicm_power_on(struct panel_drv_data *ddata) if (ddata->vddi) { r = regulator_enable(ddata->vddi); if (r) { - dev_err(&ddata->pdev->dev, + dev_err(&ddata->dsi->dev, "failed to enable VDDI: %d\n", r); goto err_vpnl; } @@ -655,7 +654,7 @@ static int dsicm_power_on(struct panel_drv_data *ddata)

r = src->ops->dsi.set_config(src, &dsi_config); if (r) { - dev_err(&ddata->pdev->dev, "failed to configure DSI\n"); + dev_err(&ddata->dsi->dev, "failed to configure DSI\n"); goto err_vddi; }

@@ -702,7 +701,7 @@ static int dsicm_power_on(struct panel_drv_data *ddata) ddata->enabled = 1;

if (!ddata->intro_printed) { - dev_info(&ddata->pdev->dev, "panel revision %02x.%02x.%02x\n", + dev_info(&ddata->dsi->dev, "panel revision %02x.%02x.%02x\n", id1, id2, id3); ddata->intro_printed = true; } @@ -711,7 +710,7 @@ static int dsicm_power_on(struct panel_drv_data *ddata)

return 0; err: - dev_err(&ddata->pdev->dev, "error while enabling panel, issuing HW reset\n"); + dev_err(&ddata->dsi->dev, "error while enabling panel, issuing HW reset\n");

dsicm_hw_reset(ddata);

@@ -738,7 +737,7 @@ static void dsicm_power_off(struct panel_drv_data *ddata) r = dsicm_sleep_in(ddata);

if (r) { - dev_err(&ddata->pdev->dev, + dev_err(&ddata->dsi->dev, "error disabling panel, issuing HW reset\n"); dsicm_hw_reset(ddata); } @@ -755,7 +754,7 @@ static void dsicm_power_off(struct panel_drv_data *ddata)

static int dsicm_panel_reset(struct panel_drv_data *ddata) { - dev_err(&ddata->pdev->dev, "performing LCD reset\n"); + dev_err(&ddata->dsi->dev, "performing LCD reset\n");

dsicm_power_off(ddata); dsicm_hw_reset(ddata); @@ -766,7 +765,7 @@ static int dsicm_connect(struct omap_dss_device *src, struct omap_dss_device *dst) { struct panel_drv_data *ddata = to_panel_data(dst); - struct device *dev = &ddata->pdev->dev; + struct device *dev = &ddata->dsi->dev; int r;

r = src->ops->dsi.request_vc(src, ddata->channel); @@ -811,7 +810,7 @@ static void dsicm_enable(struct omap_dss_device *dssdev)

return; err: - dev_dbg(&ddata->pdev->dev, "enable failed (%d)\n", r); + dev_dbg(&ddata->dsi->dev, "enable failed (%d)\n", r); mutex_unlock(&ddata->lock); }

@@ -843,7 +842,7 @@ static void dsicm_framedone_cb(int err, void *data) struct panel_drv_data *ddata = data; struct omap_dss_device *src = ddata->src;

- dev_dbg(&ddata->pdev->dev, "framedone, err %d\n", err); + dev_dbg(&ddata->dsi->dev, "framedone, err %d\n", err); src->ops->dsi.bus_unlock(src); }

@@ -867,7 +866,7 @@ static irqreturn_t dsicm_te_isr(int irq, void *data)

return IRQ_HANDLED; err: - dev_err(&ddata->pdev->dev, "start update failed\n"); + dev_err(&ddata->dsi->dev, "start update failed\n"); src->ops->dsi.bus_unlock(src); return IRQ_HANDLED; } @@ -878,7 +877,7 @@ static void dsicm_te_timeout_work_callback(struct work_struct *work) te_timeout_work.work); struct omap_dss_device *src = ddata->src;

- dev_err(&ddata->pdev->dev, "TE not received for 250ms!\n"); + dev_err(&ddata->dsi->dev, "TE not received for 250ms!\n");

atomic_set(&ddata->do_update, 0); src->ops->dsi.bus_unlock(src); @@ -891,7 +890,7 @@ static int dsicm_update(struct omap_dss_device *dssdev, struct omap_dss_device *src = ddata->src; int r;

- dev_dbg(&ddata->pdev->dev, "update %d, %d, %d x %d\n", x, y, w, h); + dev_dbg(&ddata->dsi->dev, "update %d, %d, %d x %d\n", x, y, w, h);

mutex_lock(&ddata->lock); src->ops->dsi.bus_lock(src); @@ -936,14 +935,14 @@ static int dsicm_sync(struct omap_dss_device *dssdev) struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *src = ddata->src;

- dev_dbg(&ddata->pdev->dev, "sync\n"); + dev_dbg(&ddata->dsi->dev, "sync\n");

mutex_lock(&ddata->lock); src->ops->dsi.bus_lock(src); src->ops->dsi.bus_unlock(src); mutex_unlock(&ddata->lock);

- dev_dbg(&ddata->pdev->dev, "sync done\n"); + dev_dbg(&ddata->dsi->dev, "sync done\n");

return 0; } @@ -1020,7 +1019,7 @@ static int dsicm_set_max_rx_packet_size(struct omap_dss_device *dssdev, u16 size) { struct panel_drv_data *ddata = to_panel_data(dssdev); - struct omap_dss_device *src = ddata->src; + struct mipi_dsi_device *dsi = ddata->dsi;

const u8 buf[] = { size & 0xff, @@ -1034,7 +1033,7 @@ static int dsicm_set_max_rx_packet_size(struct omap_dss_device *dssdev, .tx_len = 2, };

- return src->ops->dsi.transfer(src, &msg); + return dsi->host->ops->transfer(dsi->host, &msg); }

static int dsicm_memory_read(struct omap_dss_device *dssdev, @@ -1042,6 +1041,7 @@ static int dsicm_memory_read(struct omap_dss_device *dssdev, u16 x, u16 y, u16 w, u16 h) { struct panel_drv_data *ddata = to_panel_data(dssdev); + struct mipi_dsi_device *dsi = ddata->dsi; struct omap_dss_device *src = ddata->src; int r; int first = 1; @@ -1093,7 +1093,7 @@ static int dsicm_memory_read(struct omap_dss_device *dssdev, }; first = 0;

- r = src->ops->dsi.transfer(src, &msg); + r = dsi->host->ops->transfer(dsi->host, &msg); if (r < 0) { dev_err(dssdev->dev, "read error\n"); goto err3; @@ -1102,12 +1102,12 @@ static int dsicm_memory_read(struct omap_dss_device *dssdev, buf_used += r;

if (r < plen) { - dev_err(&ddata->pdev->dev, "short read\n"); + dev_err(&ddata->dsi->dev, "short read\n"); break; }

if (signal_pending(current)) { - dev_err(&ddata->pdev->dev, "signal pending, " + dev_err(&ddata->dsi->dev, "signal pending, " "aborting memory read\n"); r = -ERESTARTSYS; goto err3; @@ -1201,28 +1201,28 @@ static const struct omap_dss_driver dsicm_dss_driver = { .memory_read = dsicm_memory_read, };

-static int dsicm_probe_of(struct platform_device *pdev) +static int dsicm_probe_of(struct mipi_dsi_device *dsi) { - struct device_node *node = pdev->dev.of_node; + struct device_node *node = dsi->dev.of_node; struct device_node *backlight; - struct panel_drv_data *ddata = platform_get_drvdata(pdev); + struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi); struct display_timing timing; int err;

ddata->channel = TCH;

- ddata->reset_gpio = devm_gpiod_get(&pdev->dev, "reset", GPIOD_OUT_LOW); + ddata->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(ddata->reset_gpio)) { err = PTR_ERR(ddata->reset_gpio); - dev_err(&pdev->dev, "reset gpio request failed: %d", err); + dev_err(&dsi->dev, "reset gpio request failed: %d", err); return err; }

- ddata->ext_te_gpio = devm_gpiod_get_optional(&pdev->dev, "te", + ddata->ext_te_gpio = devm_gpiod_get_optional(&dsi->dev, "te", GPIOD_IN); if (IS_ERR(ddata->ext_te_gpio)) { err = PTR_ERR(ddata->ext_te_gpio); - dev_err(&pdev->dev, "TE gpio request failed: %d", err); + dev_err(&dsi->dev, "TE gpio request failed: %d", err); return err; }

@@ -1233,7 +1233,7 @@ static int dsicm_probe_of(struct platform_device *pdev) ddata->vm.pixelclock = ddata->vm.hactive * ddata->vm.vactive * 60; } else { - dev_warn(&pdev->dev, + dev_warn(&dsi->dev, "failed to get video timing, using defaults\n"); }

@@ -1243,7 +1243,7 @@ static int dsicm_probe_of(struct platform_device *pdev) ddata->height_mm = 0; of_property_read_u32(node, "height-mm", &ddata->height_mm);

- ddata->vpnl = devm_regulator_get_optional(&pdev->dev, "vpnl"); + ddata->vpnl = devm_regulator_get_optional(&dsi->dev, "vpnl"); if (IS_ERR(ddata->vpnl)) { err = PTR_ERR(ddata->vpnl); if (err == -EPROBE_DEFER) @@ -1251,7 +1251,7 @@ static int dsicm_probe_of(struct platform_device *pdev) ddata->vpnl = NULL; }

- ddata->vddi = devm_regulator_get_optional(&pdev->dev, "vddi"); + ddata->vddi = devm_regulator_get_optional(&dsi->dev, "vddi"); if (IS_ERR(ddata->vddi)) { err = PTR_ERR(ddata->vddi); if (err == -EPROBE_DEFER) @@ -1276,11 +1276,11 @@ static int dsicm_probe_of(struct platform_device *pdev) return 0; }

-static int dsicm_probe(struct platform_device *pdev) +static int dsicm_probe(struct mipi_dsi_device *dsi) { struct panel_drv_data *ddata; struct backlight_device *bldev = NULL; - struct device *dev = &pdev->dev; + struct device *dev = &dsi->dev; struct omap_dss_device *dssdev; int r;

@@ -1290,14 +1290,14 @@ static int dsicm_probe(struct platform_device *pdev) if (!ddata) return -ENOMEM;

- platform_set_drvdata(pdev, ddata); - ddata->pdev = pdev; + mipi_dsi_set_drvdata(dsi, ddata); + ddata->dsi = dsi;

ddata->vm.hactive = 864; ddata->vm.vactive = 480; ddata->vm.pixelclock = 864 * 480 * 60;

- r = dsicm_probe_of(pdev); + r = dsicm_probe_of(dsi); if (r) return r;

@@ -1379,12 +1379,12 @@ static int dsicm_probe(struct platform_device *pdev) return r; }

-static int __exit dsicm_remove(struct platform_device *pdev) +static int __exit dsicm_remove(struct mipi_dsi_device *dsi) { - struct panel_drv_data *ddata = platform_get_drvdata(pdev); + struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi); struct omap_dss_device *dssdev = &ddata->dssdev;

- dev_dbg(&pdev->dev, "remove\n"); + dev_dbg(&dsi->dev, "remove\n");

omapdss_device_unregister(dssdev);

@@ -1392,7 +1392,7 @@ static int __exit dsicm_remove(struct platform_device *pdev) dsicm_disable(dssdev); omapdss_device_disconnect(ddata->src, dssdev);

- sysfs_remove_group(&pdev->dev.kobj, &dsicm_attr_group); + sysfs_remove_group(&dsi->dev.kobj, &dsicm_attr_group);

if (ddata->extbldev) put_device(&ddata->extbldev->dev); @@ -1413,7 +1413,7 @@ static const struct of_device_id dsicm_of_match[] = {

MODULE_DEVICE_TABLE(of, dsicm_of_match);

-static struct platform_driver dsicm_driver = { +static struct mipi_dsi_driver dsicm_driver = { .probe = dsicm_probe, .remove = __exit_p(dsicm_remove), .driver = { @@ -1422,8 +1422,7 @@ static struct platform_driver dsicm_driver = { .suppress_bind_attrs = true, }, }; - -module_platform_driver(dsicm_driver); +module_mipi_dsi_driver(dsicm_driver);

MODULE_AUTHOR("Tomi Valkeinen tomi.valkeinen@ti.com"); MODULE_DESCRIPTION("Generic DSI Command Mode Panel Driver"); diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c index d39b84409656..c4107fe5a53d 100644 --- a/drivers/gpu/drm/omapdrm/dss/dsi.c +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c @@ -334,6 +334,8 @@ struct dsi_data { struct regmap *syscon; struct dss_device *dss;

+ struct mipi_dsi_host host; + struct dispc_clock_info user_dispc_cinfo; struct dss_pll_clock_info user_dsi_cinfo;

@@ -432,6 +434,11 @@ static inline struct dsi_data *to_dsi_data(struct omap_dss_device *dssdev) return dev_get_drvdata(dssdev->dev); }

+static inline struct dsi_data *host_to_omap(struct mipi_dsi_host *host) +{ + return container_of(host, struct dsi_data, host); +} + static inline void dsi_write_reg(struct dsi_data *dsi, const struct dsi_reg idx, u32 val) { @@ -4709,9 +4716,12 @@ static void dsi_release_vc(struct omap_dss_device *dssdev, int channel) } }

-static ssize_t omap_dsi_transfer(struct omap_dss_device *dssdev, - const struct mipi_dsi_msg *msg) +static ssize_t omap_dsi_host_transfer(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg) { + struct dsi_data *dsi = host_to_omap(host); + struct omap_dss_device *dssdev = &dsi->output; + switch (msg->type) { case MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM: case MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM: @@ -4785,11 +4795,30 @@ static const struct omap_dss_device_ops dsi_ops = {

.request_vc = dsi_request_vc, .release_vc = dsi_release_vc, - - .transfer = omap_dsi_transfer, }, };

+int omap_dsi_host_attach(struct mipi_dsi_host *host, + struct mipi_dsi_device *dsi) +{ + /* TODO: convert driver from custom binding method to this one */ + return 0; +} + +int omap_dsi_host_detach(struct mipi_dsi_host *host, + struct mipi_dsi_device *dsi) +{ + /* TODO: convert driver from custom binding method to this one */ + return 0; +} + +static const struct mipi_dsi_host_ops omap_dsi_host_ops = { + .attach = omap_dsi_host_attach, + .detach = omap_dsi_host_detach, + .transfer = omap_dsi_host_transfer, +}; + + /* ----------------------------------------------------------------------------- * PLL */ @@ -5258,15 +5287,18 @@ static int dsi_probe(struct platform_device *pdev) dsi->num_lanes_supported = 3; }

- r = of_platform_populate(dev->of_node, NULL, NULL, dev); - if (r) { - DSSERR("Failed to populate DSI child devices: %d\n", r); + dsi->host.ops = &omap_dsi_host_ops; + dsi->host.dev = &pdev->dev; + + r = mipi_dsi_host_register(&dsi->host); + if (r < 0) { + dev_err(&pdev->dev, "failed to register DSI host: %d\n", r); goto err_pm_disable; }

r = dsi_init_output(dsi); if (r) - goto err_of_depopulate; + goto err_dsi_host_unregister;

r = dsi_probe_of(dsi); if (r) { @@ -5282,8 +5314,8 @@ static int dsi_probe(struct platform_device *pdev)

err_uninit_output: dsi_uninit_output(dsi); -err_of_depopulate: - of_platform_depopulate(dev); +err_dsi_host_unregister: + mipi_dsi_host_unregister(&dsi->host); err_pm_disable: pm_runtime_disable(dev); return r; @@ -5297,7 +5329,7 @@ static int dsi_remove(struct platform_device *pdev)

dsi_uninit_output(dsi);

- of_platform_depopulate(&pdev->dev); + mipi_dsi_host_unregister(&dsi->host);

pm_runtime_disable(&pdev->dev);

diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h index 143ff346c311..be37c9eb212c 100644 --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h @@ -310,10 +310,6 @@ struct omapdss_dsi_ops {

int (*request_vc)(struct omap_dss_device *dssdev, int channel); void (*release_vc)(struct omap_dss_device *dssdev, int channel); - - /* data transfer */ - ssize_t (*transfer)(struct omap_dss_device *dssdev, - const struct mipi_dsi_msg *msg); };

struct omap_dss_device_ops {