Re: [PATCH v3 33/56] drm/omap: dsi: convert to drm_panel

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

On Thu, Nov 05, 2020 at 02:03:10PM +0200, Tomi Valkeinen wrote:
> From: Sebastian Reichel <sebastian.reichel@collabora.com>
> 
> This converts the DSI module to expect common drm_panel display
> drivers instead of dssdev based ones.
> 
> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
>  .../gpu/drm/omapdrm/displays/panel-dsi-cm.c   | 204 +++++++-----------
>  drivers/gpu/drm/omapdrm/dss/dsi.c             | 133 ++++++++++--
>  .../gpu/drm/omapdrm/dss/omapdss-boot-init.c   |   1 -
>  drivers/gpu/drm/omapdrm/dss/omapdss.h         |   8 -
>  4 files changed, 189 insertions(+), 157 deletions(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> index d9b3444b4faf..3668b3f0aff2 100644
> --- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> +++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> @@ -6,8 +6,6 @@
>   * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
>   */
>  
> -/* #define DEBUG */
> -
>  #include <linux/backlight.h>
>  #include <linux/delay.h>
>  #include <linux/gpio/consumer.h>
> @@ -20,11 +18,14 @@
>  #include <linux/regulator/consumer.h>
>  
>  #include <drm/drm_connector.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_modes.h>

Alphabetically ordered please.

>  
> +#include <video/display_timing.h>
>  #include <video/mipi_display.h>
>  #include <video/of_display_timing.h>
> -
> -#include "../dss/omapdss.h"
> +#include <video/videomode.h>
>  
>  #define DCS_READ_NUM_ERRORS	0x05
>  #define DCS_GET_ID1		0xda
> @@ -35,11 +36,8 @@
>  
>  struct panel_drv_data {
>  	struct mipi_dsi_device *dsi;
> -
> -	struct omap_dss_device dssdev;
> -	struct omap_dss_device *src;
> -
> -	struct videomode vm;
> +	struct drm_panel panel;
> +	struct drm_display_mode mode;
>  
>  	struct mutex lock;
>  
> @@ -71,7 +69,11 @@ struct panel_drv_data {
>  	bool ulps_enabled;
>  };
>  
> -#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
> +

A single blank line is enough.

> +static inline struct panel_drv_data *panel_to_ddata(struct drm_panel *panel)
> +{
> +	return container_of(panel, struct panel_drv_data, panel);
> +}
>  
>  static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable);
>  
> @@ -285,7 +287,6 @@ static void dsicm_hw_reset(struct panel_drv_data *ddata)
>  
>  static int dsicm_power_on(struct panel_drv_data *ddata)
>  {
> -	struct omap_dss_device *src = ddata->src;
>  	u8 id1, id2, id3;
>  	int r;
>  
> @@ -322,10 +323,6 @@ static int dsicm_power_on(struct panel_drv_data *ddata)
>  	if (r)
>  		goto err;
>  
> -	r = src->ops->dsi.enable_video_output(src, ddata->dsi->channel);
> -	if (r)
> -		goto err;
> -
>  	ddata->enabled = true;
>  
>  	if (!ddata->intro_printed) {
> @@ -345,15 +342,12 @@ static int dsicm_power_on(struct panel_drv_data *ddata)
>  	return r;
>  }
>  
> -static void dsicm_power_off(struct panel_drv_data *ddata)
> +static int dsicm_power_off(struct panel_drv_data *ddata)
>  {
> -	struct omap_dss_device *src = ddata->src;
>  	int r;
>  
>  	ddata->enabled = false;
>  
> -	src->ops->dsi.disable_video_output(src, ddata->dsi->channel);
> -
>  	r = mipi_dsi_dcs_set_display_off(ddata->dsi);
>  	if (!r)
>  		r = dsicm_sleep_in(ddata);
> @@ -363,51 +357,25 @@ static void dsicm_power_off(struct panel_drv_data *ddata)
>  				"error disabling panel, issuing HW reset\n");
>  		dsicm_hw_reset(ddata);
>  	}
> -}
> -
> -static int dsicm_connect(struct omap_dss_device *src,
> -			 struct omap_dss_device *dst)
> -{
> -	struct panel_drv_data *ddata = to_panel_data(dst);
> -
> -	ddata->src = src;
> -	return 0;
> -}
> -
> -static void dsicm_disconnect(struct omap_dss_device *src,
> -			     struct omap_dss_device *dst)
> -{
> -	struct panel_drv_data *ddata = to_panel_data(dst);
>  
> -	ddata->src = NULL;
> +	return r;
>  }
>  
> -static void dsicm_pre_enable(struct omap_dss_device *dssdev)
> +static int dsicm_prepare(struct drm_panel *panel)
>  {
> -	struct panel_drv_data *ddata = to_panel_data(dssdev);
> -	struct omap_dss_device *src = ddata->src;
> +	struct panel_drv_data *ddata = panel_to_ddata(panel);
>  	int r;
> -	struct omap_dss_dsi_config dsi_config = {
> -		.vm = &ddata->vm,
> -		.hs_clk_min = 150000000,
> -		.hs_clk_max = 300000000,
> -		.lp_clk_min = 7000000,
> -		.lp_clk_max = 10000000,
> -	};
>  
>  	r = regulator_bulk_enable(DCS_REGULATOR_SUPPLY_NUM, ddata->supplies);
>  	if (r)
>  		dev_err(&ddata->dsi->dev, "failed to enable supplies: %d\n", r);
>  
> -	r = src->ops->dsi.set_config(src, &dsi_config);
> -	if (r) {
> -		dev_err(&ddata->dsi->dev, "failed to configure DSI\n");
> -	}
> +	return r;
>  }
>  
> -static void dsicm_enable(struct omap_dss_device *dssdev)
> +static int dsicm_enable(struct drm_panel *panel)
>  {
> -	struct panel_drv_data *ddata = to_panel_data(dssdev);
> +	struct panel_drv_data *ddata = panel_to_ddata(panel);
>  	int r;
>  
>  	mutex_lock(&ddata->lock);
> @@ -420,33 +388,39 @@ static void dsicm_enable(struct omap_dss_device *dssdev)
>  
>  	dsicm_bl_power(ddata, true);
>  
> -	return;
> +	return 0;
>  err:
> -	dev_dbg(&ddata->dsi->dev, "enable failed (%d)\n", r);
> +	dev_err(&ddata->dsi->dev, "enable failed (%d)\n", r);
>  	mutex_unlock(&ddata->lock);
> +	return r;
> +}
> +
> +static int dsicm_unprepare(struct drm_panel *panel)
> +{
> +	struct panel_drv_data *ddata = panel_to_ddata(panel);
> +	int r;
> +
> +	r = regulator_bulk_disable(DCS_REGULATOR_SUPPLY_NUM, ddata->supplies);
> +	if (r)
> +		dev_err(&ddata->dsi->dev, "failed to disable supplies: %d\n", r);
> +
> +	return r;
>  }
>  
> -static void dsicm_disable(struct omap_dss_device *dssdev)
> +static int dsicm_disable(struct drm_panel *panel)
>  {
> -	struct panel_drv_data *ddata = to_panel_data(dssdev);
> +	struct panel_drv_data *ddata = panel_to_ddata(panel);
> +	int r;
>  
>  	dsicm_bl_power(ddata, false);
>  
>  	mutex_lock(&ddata->lock);
>  
> -	dsicm_power_off(ddata);
> +	r = dsicm_power_off(ddata);
>  
>  	mutex_unlock(&ddata->lock);
> -}
> -
> -static void dsicm_post_disable(struct omap_dss_device *dssdev)
> -{
> -	struct panel_drv_data *ddata = to_panel_data(dssdev);
> -	int r;
>  
> -	r = regulator_bulk_disable(DCS_REGULATOR_SUPPLY_NUM, ddata->supplies);
> -	if (r)
> -		dev_err(&ddata->dsi->dev, "failed to disable supplies: %d\n", r);
> +	return r;
>  }
>  
>  static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable)
> @@ -465,50 +439,37 @@ static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable)
>  	return r;
>  }
>  
> -static int dsicm_get_modes(struct omap_dss_device *dssdev,
> +static int dsicm_get_modes(struct drm_panel *panel,
>  			   struct drm_connector *connector)
>  {
> -	struct panel_drv_data *ddata = to_panel_data(dssdev);
> +	struct panel_drv_data *ddata = panel_to_ddata(panel);
> +	struct drm_display_mode *mode;
> +
> +	mode = drm_mode_duplicate(connector->dev, &ddata->mode);
> +	if (!mode) {
> +		dev_err(&ddata->dsi->dev, "failed to add mode %ux%ux@%u kHz\n",
> +			ddata->mode.hdisplay, ddata->mode.vdisplay,
> +			ddata->mode.clock);
> +		return -ENOMEM;
> +	}
> +
> +	drm_mode_set_name(mode);
> +	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
>  
>  	connector->display_info.width_mm = ddata->width_mm;
>  	connector->display_info.height_mm = ddata->height_mm;
>  
> -	return omapdss_display_get_modes(connector, &ddata->vm);
> -}
> -
> -static int dsicm_check_timings(struct omap_dss_device *dssdev,
> -			       struct drm_display_mode *mode)
> -{
> -	struct panel_drv_data *ddata = to_panel_data(dssdev);
> -	int ret = 0;
> -
> -	if (mode->hdisplay != ddata->vm.hactive)
> -		ret = -EINVAL;
> -
> -	if (mode->vdisplay != ddata->vm.vactive)
> -		ret = -EINVAL;
> +	drm_mode_probed_add(connector, mode);
>  
> -	if (ret) {
> -		dev_warn(dssdev->dev, "wrong resolution: %d x %d",
> -			 mode->hdisplay, mode->vdisplay);
> -		dev_warn(dssdev->dev, "panel resolution: %d x %d",
> -			 ddata->vm.hactive, ddata->vm.vactive);
> -	}
> -
> -	return ret;
> +	return 1;
>  }
>  
> -static const struct omap_dss_device_ops dsicm_ops = {
> -	.connect	= dsicm_connect,
> -	.disconnect	= dsicm_disconnect,
> -
> -	.pre_enable	= dsicm_pre_enable,
> -	.enable		= dsicm_enable,
> -	.disable	= dsicm_disable,
> -	.post_disable	= dsicm_post_disable,
> -
> -	.get_modes	= dsicm_get_modes,
> -	.check_timings	= dsicm_check_timings,
> +static const struct drm_panel_funcs dsicm_panel_funcs = {
> +	.unprepare = dsicm_unprepare,
> +	.disable = dsicm_disable,
> +	.prepare = dsicm_prepare,
> +	.enable = dsicm_enable,
> +	.get_modes = dsicm_get_modes,
>  };
>  
>  static int dsicm_probe_of(struct mipi_dsi_device *dsi)
> @@ -517,8 +478,12 @@ static int dsicm_probe_of(struct mipi_dsi_device *dsi)
>  	struct backlight_device *backlight;
>  	struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi);
>  	struct display_timing timing;
> +	struct videomode vm = { 0 };

How about

	struct videomode vm = {
		.hactive = 864,
		.vactive = 480,
	};

>  	int err;
>  
> +	vm.hactive = 864;
> +	vm.vactive = 480;
> +
>  	ddata->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
>  	if (IS_ERR(ddata->reset_gpio)) {
>  		err = PTR_ERR(ddata->reset_gpio);
> @@ -528,15 +493,16 @@ static int dsicm_probe_of(struct mipi_dsi_device *dsi)
>  
>  	err = of_get_display_timing(node, "panel-timing", &timing);
>  	if (!err) {
> -		videomode_from_timing(&timing, &ddata->vm);
> -		if (!ddata->vm.pixelclock)
> -			ddata->vm.pixelclock =
> -				ddata->vm.hactive * ddata->vm.vactive * 60;
> +		videomode_from_timing(&timing, &vm);
>  	} else {
>  		dev_warn(&dsi->dev,
>  			 "failed to get video timing, using defaults\n");
>  	}
>  
> +	if (!vm.pixelclock)
> +		vm.pixelclock = vm.hactive * vm.vactive * 60;
> +	drm_display_mode_from_videomode(&vm, &ddata->mode);
> +
>  	ddata->width_mm = 0;
>  	of_property_read_u32(node, "width-mm", &ddata->width_mm);
>  
> @@ -570,7 +536,6 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
>  	struct panel_drv_data *ddata;
>  	struct backlight_device *bldev = NULL;
>  	struct device *dev = &dsi->dev;
> -	struct omap_dss_device *dssdev;
>  	int r;
>  
>  	dev_dbg(dev, "probe\n");
> @@ -582,30 +547,17 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
>  	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(dsi);
>  	if (r)
>  		return r;
>  
> -	dssdev = &ddata->dssdev;
> -	dssdev->dev = dev;
> -	dssdev->ops = &dsicm_ops;
> -	dssdev->type = OMAP_DISPLAY_TYPE_DSI;
> -	dssdev->display = true;
> -	dssdev->owner = THIS_MODULE;
> -	dssdev->of_port = 0;
> -	dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES;
> -
> -	omapdss_display_init(dssdev);
> -	omapdss_device_register(dssdev);
> -
>  	mutex_init(&ddata->lock);
>  
>  	dsicm_hw_reset(ddata);
>  
> +	drm_panel_init(&ddata->panel, dev, &dsicm_panel_funcs,
> +		       DRM_MODE_CONNECTOR_DSI);
> +
>  	if (ddata->use_dsi_backlight) {
>  		struct backlight_properties props = { 0 };
>  		props.max_brightness = 255;
> @@ -637,6 +589,8 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
>  	if (ddata->ulps_enabled)
>  		dsi->mode_flags |= MIPI_DSI_MODE_ULPS_IDLE;
>  
> +	drm_panel_add(&ddata->panel);
> +
>  	r = mipi_dsi_attach(dsi);
>  	if (r < 0)
>  		goto err_dsi_attach;
> @@ -644,6 +598,7 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
>  	return 0;
>  
>  err_dsi_attach:
> +	drm_panel_remove(&ddata->panel);
>  	sysfs_remove_group(&dsi->dev.kobj, &dsicm_attr_group);
>  err_bl:
>  	if (ddata->extbldev)
> @@ -655,15 +610,12 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
>  static int __exit dsicm_remove(struct mipi_dsi_device *dsi)
>  {
>  	struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi);
> -	struct omap_dss_device *dssdev = &ddata->dssdev;
>  
>  	dev_dbg(&dsi->dev, "remove\n");
>  
>  	mipi_dsi_detach(dsi);
>  
> -	omapdss_device_unregister(dssdev);
> -
> -	omapdss_device_disconnect(ddata->src, dssdev);
> +	drm_panel_remove(&ddata->panel);
>  
>  	sysfs_remove_group(&dsi->dev.kobj, &dsicm_attr_group);
>  
> @@ -677,7 +629,7 @@ static int __exit dsicm_remove(struct mipi_dsi_device *dsi)
>  }
>  
>  static const struct of_device_id dsicm_of_match[] = {
> -	{ .compatible = "omapdss,panel-dsi-cm", },
> +	{ .compatible = "panel-dsi-cm", },
>  	{},
>  };
>  
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
> index 620cef8bb1f2..a1a867a7d91d 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -36,6 +36,7 @@
>  #include <linux/sys_soc.h>
>  
>  #include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_panel.h>
>  #include <video/mipi_display.h>
>  
>  #include "omapdss.h"
> @@ -217,6 +218,8 @@ static int dsi_vc_send_null(struct dsi_data *dsi, int channel);
>  static ssize_t _omap_dsi_host_transfer(struct dsi_data *dsi,
>  				       const struct mipi_dsi_msg *msg);
>  
> +static void dsi_display_disable(struct omap_dss_device *dssdev);
> +

Could you reorder functions to avoid forward-declarations ? This can be
done on top if it generates annoying conflicts.

>  /* DSI PLL HSDIV indices */
>  #define HSDIV_DISPC	0
>  #define HSDIV_DSI	1
> @@ -383,6 +386,7 @@ struct dsi_data {
>  	bool te_enabled;
>  	bool ulps_enabled;
>  	bool ulps_auto_idle;
> +	bool video_enabled;
>  
>  	struct delayed_work ulps_work;
>  
> @@ -423,6 +427,8 @@ struct dsi_data {
>  
>  	unsigned int scp_clk_refcount;
>  
> +	struct omap_dss_dsi_config config;
> +
>  	struct dss_lcd_mgr_config mgr_config;
>  	struct videomode vm;
>  	enum mipi_dsi_pixel_format pix_fmt;
> @@ -3622,7 +3628,7 @@ static int dsi_configure_pins(struct omap_dss_device *dssdev,
>  	return 0;
>  }
>  
> -static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
> +static void dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
>  {
>  	struct dsi_data *dsi = to_dsi_data(dssdev);
>  	int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
> @@ -3631,8 +3637,10 @@ static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
>  	int r;
>  
>  	r = dsi_display_init_dispc(dsi);
> -	if (r)
> -		return r;
> +	if (r) {
> +		dev_err(dsi->dev, "failed to init dispc!\n");
> +		return;
> +	}
>  
>  	if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
>  		switch (dsi->pix_fmt) {
> @@ -3672,7 +3680,7 @@ static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
>  	if (r)
>  		goto err_mgr_enable;
>  
> -	return 0;
> +	return;
>  
>  err_mgr_enable:
>  	if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
> @@ -3681,7 +3689,8 @@ static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
>  	}
>  err_pix_fmt:
>  	dsi_display_uninit_dispc(dsi);
> -	return r;
> +	dev_err(dsi->dev, "failed to enable DSI encoder!\n");
> +	return;
>  }
>  
>  static void dsi_disable_video_output(struct omap_dss_device *dssdev, int channel)
> @@ -3704,6 +3713,25 @@ static void dsi_disable_video_output(struct omap_dss_device *dssdev, int channel
>  	dsi_display_uninit_dispc(dsi);
>  }
>  
> +static void dsi_disable_video_outputs(struct omap_dss_device *dssdev)
> +{
> +	struct dsi_data *dsi = to_dsi_data(dssdev);
> +	int i;
> +
> +	dsi_bus_lock(dsi);
> +	dsi->video_enabled = false;
> +
> +	for (i = 0; i < 3; i++) {
> +		if (!dsi->vc[i].dest)
> +			continue;
> +		dsi_disable_video_output(dssdev, i);
> +	}
> +
> +	dsi_display_disable(dssdev);
> +
> +	dsi_bus_unlock(dsi);
> +}
> +
>  static void dsi_update_screen_dispc(struct dsi_data *dsi)
>  {
>  	unsigned int bytespp;
> @@ -3897,6 +3925,11 @@ static int dsi_update_channel(struct omap_dss_device *dssdev, int channel)
>  
>  	dsi_bus_lock(dsi);
>  
> +	if (!dsi->video_enabled) {
> +		r = -EIO;
> +		goto err;
> +	}
> +
>  	if (!dsi->vc[channel].dest) {
>  		r = -ENODEV;
>  		goto err;
> @@ -3942,7 +3975,7 @@ static int dsi_update_all(struct omap_dss_device *dssdev)
>  
>  	for (i = 0; i < 4; i++) {
>  		r = dsi_update_channel(dssdev, i);
> -		if (r != -ENODEV)
> +		if (r && r != -ENODEV)

Does this belong to this patch ? I haven't flagged it when reviwing the
patch that introduced this code, assuming that you meant to exit from
the loop once a channel with a client is found, given that we don't
support multiple clients. In any case this should be coordinated with
dsi_enable_video_outputs() and dsi_disable_video_outputs(), all should
stop on the first client, or loop over all clients.

>  			return r;
>  	}
>  
> @@ -4165,8 +4198,30 @@ static void dsi_display_enable(struct omap_dss_device *dssdev)
>  {
>  	struct dsi_data *dsi = to_dsi_data(dssdev);
>  	DSSDBG("dsi_display_enable\n");
> -	dsi_bus_lock(dsi);
> +	WARN_ON(!dsi_bus_is_locked(dsi));
> +
>  	dsi_display_ulps_enable(dsi);
> +}
> +
> +static void dsi_enable_video_outputs(struct omap_dss_device *dssdev)
> +{
> +	struct dsi_data *dsi = to_dsi_data(dssdev);
> +	int i;

i should be unsigned.

> +
> +	dsi_bus_lock(dsi);
> +
> +	dsi_display_enable(dssdev);
> +
> +	for (i = 0; i < 3; i++) {
> +		if (!dsi->vc[i].dest)
> +			continue;
> +		dsi_enable_video_output(dssdev, i);
> +	}
> +
> +	dsi->video_enabled = true;
> +
> +	dsi_set_ulps_auto(dsi, true);
> +
>  	dsi_bus_unlock(dsi);
>  }
>  
> @@ -4193,11 +4248,11 @@ static void dsi_display_disable(struct omap_dss_device *dssdev)
>  {
>  	struct dsi_data *dsi = to_dsi_data(dssdev);
>  
> +	WARN_ON(!dsi_bus_is_locked(dsi));
> +
>  	DSSDBG("dsi_display_disable\n");
>  
> -	dsi_bus_lock(dsi);
>  	dsi_display_ulps_disable(dsi, true, false);
> -	dsi_bus_unlock(dsi);
>  }
>  
>  static int dsi_enable_te(struct dsi_data *dsi, bool enable)
> @@ -4735,14 +4790,18 @@ static bool dsi_is_video_mode(struct omap_dss_device *dssdev)
>  }
>  
>  static int dsi_set_config(struct omap_dss_device *dssdev,
> -		const struct omap_dss_dsi_config *config)
> +		const struct drm_display_mode *mode)
>  {
>  	struct dsi_data *dsi = to_dsi_data(dssdev);
>  	struct dsi_clk_calc_ctx ctx;
> -	struct omap_dss_dsi_config cfg = *config;
> +	struct videomode vm;
> +	struct omap_dss_dsi_config cfg = dsi->config;
>  	bool ok;
>  	int r;
>  
> +	drm_display_mode_to_videomode(mode, &vm);
> +	cfg.vm = &vm;
> +
>  	mutex_lock(&dsi->lock);
>  
>  	cfg.mode = dsi->mode;
> @@ -4906,9 +4965,15 @@ static ssize_t omap_dsi_host_transfer(struct mipi_dsi_host *host,
>  	int r;
>  
>  	dsi_bus_lock(dsi);
> -	dsi_set_ulps_auto(dsi, false);
> -	r = _omap_dsi_host_transfer(dsi, msg);
> -	dsi_set_ulps_auto(dsi, true);
> +
> +	if (dsi->video_enabled) {
> +		dsi_set_ulps_auto(dsi, false);
> +		r = _omap_dsi_host_transfer(dsi, msg);
> +		dsi_set_ulps_auto(dsi, true);
> +	} else {
> +		r = -EIO;
> +	}
> +
>  	dsi_bus_unlock(dsi);
>  
>  	return r;
> @@ -4929,6 +4994,23 @@ static int dsi_get_clocks(struct dsi_data *dsi)
>  	return 0;
>  }
>  
> +static void dsi_set_timings(struct omap_dss_device *dssdev,
> +			    const struct drm_display_mode *mode)
> +{
> +	DSSDBG("dsi_set_timings\n");
> +	dsi_set_config(dssdev, mode);
> +}
> +
> +static int dsi_check_timings(struct omap_dss_device *dssdev,
> +			     struct drm_display_mode *mode)
> +{
> +	DSSDBG("dsi_check_timings\n");
> +
> +	/* TODO */
> +
> +	return 0;
> +}
> +
>  static int dsi_connect(struct omap_dss_device *src,
>  		       struct omap_dss_device *dst)
>  {
> @@ -4944,15 +5026,13 @@ static void dsi_disconnect(struct omap_dss_device *src,
>  static const struct omap_dss_device_ops dsi_ops = {
>  	.connect = dsi_connect,
>  	.disconnect = dsi_disconnect,
> -	.enable = dsi_display_enable,
> -	.disable = dsi_display_disable,
> -
> -	.dsi = {
> -		.set_config = dsi_set_config,
> +	.enable = dsi_enable_video_outputs,
> +	.disable = dsi_disable_video_outputs,
>  
> -		.enable_video_output = dsi_enable_video_output,
> -		.disable_video_output = dsi_disable_video_output,
> +	.check_timings = dsi_check_timings,
> +	.set_timings = dsi_set_timings,
>  
> +	.dsi = {
>  		.update = dsi_update_all,
>  		.is_video_mode = dsi_is_video_mode,
>  	},
> @@ -5040,6 +5120,7 @@ static int omap_dsi_host_attach(struct mipi_dsi_host *host,
>  {
>  	struct dsi_data *dsi = host_to_omap(host);
>  	unsigned int channel = client->channel;
> +	struct drm_panel *panel;
>  	int r;
>  
>  	if (channel > 3)
> @@ -5057,6 +5138,10 @@ static int omap_dsi_host_attach(struct mipi_dsi_host *host,
>  
>  	dsi_bus_lock(dsi);
>  
> +	panel = of_drm_find_panel(client->dev.of_node);
> +	if (IS_ERR(panel))
> +		return PTR_ERR(panel);

Is it intended that the panel isn't used ?

> +
>  	atomic_set(&dsi->do_ext_te_update, 0);
>  
>  	if (client->mode_flags & MIPI_DSI_MODE_VIDEO) {
> @@ -5077,8 +5162,12 @@ static int omap_dsi_host_attach(struct mipi_dsi_host *host,
>  	INIT_DEFERRABLE_WORK(&dsi->ulps_work,
>  			     omap_dsi_ulps_work_callback);
>  
> +	dsi->config.hs_clk_min = 150000000; // TODO: get from client?
> +	dsi->config.hs_clk_max = client->hs_rate;
> +	dsi->config.lp_clk_min = 7000000; // TODO: get from client?
> +	dsi->config.lp_clk_max = client->lp_rate;
> +
>  	dsi->ulps_auto_idle = !!(client->mode_flags & MIPI_DSI_MODE_ULPS_IDLE);
> -	dsi_set_ulps_auto(dsi, true);
>  
>  	dsi_bus_unlock(dsi);
>  	return 0;
> diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c b/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c
> index 72a7da7bfff1..18560ca4bbb0 100644
> --- a/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c
> +++ b/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c
> @@ -174,7 +174,6 @@ static const struct of_device_id omapdss_of_match[] __initconst = {
>  };
>  
>  static const struct of_device_id omapdss_of_fixups_whitelist[] __initconst = {
> -	{ .compatible = "panel-dsi-cm" },
>  	{},
>  };
>  
> diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
> index 4200611525d5..3ee3063b6a2d 100644
> --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
> +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
> @@ -278,14 +278,6 @@ struct omap_dss_writeback_info {
>  struct omapdss_dsi_ops {
>  	int (*update)(struct omap_dss_device *dssdev);
>  	bool (*is_video_mode)(struct omap_dss_device *dssdev);
> -
> -	/* legacy API used by omapdss panels */
> -	int (*set_config)(struct omap_dss_device *dssdev,
> -			const struct omap_dss_dsi_config *cfg);
> -
> -	int (*enable_video_output)(struct omap_dss_device *dssdev, int channel);
> -	void (*disable_video_output)(struct omap_dss_device *dssdev,
> -			int channel);
>  };
>  
>  struct omap_dss_device_ops {

-- 
Regards,

Laurent Pinchart