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Date:   Tue, 24 Nov 2020 18:35:37 +0100
From:   Sam Ravnborg <sam@ravnborg.org>
To:     Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc:     Sebastian Reichel <sre@kernel.org>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Nikhil Devshatwar <nikhil.nd@ti.com>,
        linux-omap@vger.kernel.org, dri-devel@lists.freedesktop.org,
        Tony Lindgren <tony@atomide.com>, hns@goldelico.com,
        Sekhar Nori <nsekhar@ti.com>
Subject: Re: [PATCH v4 69/80] drm/panel: panel-dsi-cm: add panel database to
 driver
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References: <20201124124538.660710-1-tomi.valkeinen@ti.com>
 <20201124124538.660710-70-tomi.valkeinen@ti.com>
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On Tue, Nov 24, 2020 at 02:45:27PM +0200, Tomi Valkeinen wrote:
> Add a panel database to the driver instead of reading propertes from DT
> data. This is similar to panel-simple, and I believe it's more future
> safe way to handle the panels.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Looks good, and you remembered to drop the unsed includes - nice.

Reviewed-by: Sam Ravnborg <sam@ravnborg.org>


> ---
>  drivers/gpu/drm/panel/panel-dsi-cm.c | 107 +++++++++++++++++----------
>  1 file changed, 69 insertions(+), 38 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-dsi-cm.c b/drivers/gpu/drm/panel/panel-dsi-cm.c
> index c17ed728c695..ec87b785871f 100644
> --- a/drivers/gpu/drm/panel/panel-dsi-cm.c
> +++ b/drivers/gpu/drm/panel/panel-dsi-cm.c
> @@ -22,10 +22,7 @@
>  #include <drm/drm_modes.h>
>  #include <drm/drm_panel.h>
>  
> -#include <video/display_timing.h>
>  #include <video/mipi_display.h>
> -#include <video/of_display_timing.h>
> -#include <video/videomode.h>
>  
>  #define DCS_GET_ID1		0xda
>  #define DCS_GET_ID2		0xdb
> @@ -33,6 +30,18 @@
>  
>  #define DCS_REGULATOR_SUPPLY_NUM 2
>  
> +static const struct of_device_id dsicm_of_match[];
> +
> +struct dsic_panel_data {
> +	u32 xres;
> +	u32 yres;
> +	u32 refresh;
> +	u32 width_mm;
> +	u32 height_mm;
> +	u32 max_hs_rate;
> +	u32 max_lp_rate;
> +};
> +
>  struct panel_drv_data {
>  	struct mipi_dsi_device *dsi;
>  	struct drm_panel panel;
> @@ -48,16 +57,14 @@ struct panel_drv_data {
>  					 */
>  	unsigned long	hw_guard_wait;	/* max guard time in jiffies */
>  
> -	/* panel HW configuration from DT or platform data */
> +	const struct dsic_panel_data *panel_data;
> +
>  	struct gpio_desc *reset_gpio;
>  
>  	struct regulator_bulk_data supplies[DCS_REGULATOR_SUPPLY_NUM];
>  
>  	bool use_dsi_backlight;
>  
> -	int width_mm;
> -	int height_mm;
> -
>  	/* runtime variables */
>  	bool enabled;
>  
> @@ -455,11 +462,8 @@ static int dsicm_get_modes(struct drm_panel *panel,
>  		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;
> +	connector->display_info.width_mm = ddata->panel_data->width_mm;
> +	connector->display_info.height_mm = ddata->panel_data->height_mm;
>  
>  	drm_mode_probed_add(connector, mode);
>  
> @@ -476,15 +480,10 @@ static const struct drm_panel_funcs dsicm_panel_funcs = {
>  
>  static int dsicm_probe_of(struct mipi_dsi_device *dsi)
>  {
> -	struct device_node *node = dsi->dev.of_node;
>  	struct backlight_device *backlight;
>  	struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi);
> -	struct display_timing timing;
> -	struct videomode vm = {
> -		.hactive = 864,
> -		.vactive = 480,
> -	};
>  	int err;
> +	struct drm_display_mode *mode = &ddata->mode;
>  
>  	ddata->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
>  	if (IS_ERR(ddata->reset_gpio)) {
> @@ -493,23 +492,16 @@ static int dsicm_probe_of(struct mipi_dsi_device *dsi)
>  		return err;
>  	}
>  
> -	err = of_get_display_timing(node, "panel-timing", &timing);
> -	if (!err) {
> -		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);
> -
> -	ddata->height_mm = 0;
> -	of_property_read_u32(node, "height-mm", &ddata->height_mm);
> +	mode->hdisplay = mode->hsync_start = mode->hsync_end = mode->htotal =
> +		ddata->panel_data->xres;
> +	mode->vdisplay = mode->vsync_start = mode->vsync_end = mode->vtotal =
> +		ddata->panel_data->yres;
> +	mode->clock = ddata->panel_data->xres * ddata->panel_data->yres *
> +		ddata->panel_data->refresh / 1000;
> +	mode->width_mm = ddata->panel_data->width_mm;
> +	mode->height_mm = ddata->panel_data->height_mm;
> +	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> +	drm_mode_set_name(mode);
>  
>  	ddata->supplies[0].supply = "vpnl";
>  	ddata->supplies[1].supply = "vddi";
> @@ -536,6 +528,7 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
>  	struct panel_drv_data *ddata;
>  	struct backlight_device *bldev = NULL;
>  	struct device *dev = &dsi->dev;
> +	const struct of_device_id *id;
>  	int r;
>  
>  	dev_dbg(dev, "probe\n");
> @@ -547,6 +540,12 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
>  	mipi_dsi_set_drvdata(dsi, ddata);
>  	ddata->dsi = dsi;
>  
> +	id = of_match_node(dsicm_of_match, dev->of_node);
> +	if (!id)
> +		return -ENODEV;
> +
> +	ddata->panel_data = id->data;
> +
>  	r = dsicm_probe_of(dsi);
>  	if (r)
>  		return r;
> @@ -583,8 +582,8 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
>  	dsi->format = MIPI_DSI_FMT_RGB888;
>  	dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS |
>  			  MIPI_DSI_MODE_EOT_PACKET;
> -	dsi->hs_rate = 300000000;
> -	dsi->lp_rate = 10000000;
> +	dsi->hs_rate = ddata->panel_data->max_hs_rate;
> +	dsi->lp_rate = ddata->panel_data->max_lp_rate;
>  
>  	drm_panel_add(&ddata->panel);
>  
> @@ -622,8 +621,40 @@ static int dsicm_remove(struct mipi_dsi_device *dsi)
>  	return 0;
>  }
>  
> +static const struct dsic_panel_data taal_data = {
> +	.xres = 864,
> +	.yres = 480,
> +	.refresh = 60,
> +	.width_mm = 0,
> +	.height_mm = 0,
> +	.max_hs_rate = 300000000,
> +	.max_lp_rate = 10000000,
> +};
> +
> +static const struct dsic_panel_data himalaya_data = {
> +	.xres = 480,
> +	.yres = 864,
> +	.refresh = 60,
> +	.width_mm = 49,
> +	.height_mm = 88,
> +	.max_hs_rate = 300000000,
> +	.max_lp_rate = 10000000,
> +};
> +
> +static const struct dsic_panel_data droid4_data = {
> +	.xres = 540,
> +	.yres = 960,
> +	.refresh = 60,
> +	.width_mm = 50,
> +	.height_mm = 89,
> +	.max_hs_rate = 300000000,
> +	.max_lp_rate = 10000000,
> +};
> +
>  static const struct of_device_id dsicm_of_match[] = {
> -	{ .compatible = "panel-dsi-cm", },
> +	{ .compatible = "tpo,taal", .data = &taal_data },
> +	{ .compatible = "nokia,himalaya", &himalaya_data },
> +	{ .compatible = "motorola,droid4-panel", &droid4_data },
>  	{},
>  };
>  
> -- 
> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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Date: Tue, 24 Nov 2020 18:35:37 +0100
From: Sam Ravnborg <sam@ravnborg.org>
To: Tomi Valkeinen <tomi.valkeinen@ti.com>
Subject: Re: [PATCH v4 69/80] drm/panel: panel-dsi-cm: add panel database to
 driver
Message-ID: <20201124173537.GD56262@ravnborg.org>
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On Tue, Nov 24, 2020 at 02:45:27PM +0200, Tomi Valkeinen wrote:
> Add a panel database to the driver instead of reading propertes from DT
> data. This is similar to panel-simple, and I believe it's more future
> safe way to handle the panels.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Looks good, and you remembered to drop the unsed includes - nice.

Reviewed-by: Sam Ravnborg <sam@ravnborg.org>


> ---
>  drivers/gpu/drm/panel/panel-dsi-cm.c | 107 +++++++++++++++++----------
>  1 file changed, 69 insertions(+), 38 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-dsi-cm.c b/drivers/gpu/drm/panel/panel-dsi-cm.c
> index c17ed728c695..ec87b785871f 100644
> --- a/drivers/gpu/drm/panel/panel-dsi-cm.c
> +++ b/drivers/gpu/drm/panel/panel-dsi-cm.c
> @@ -22,10 +22,7 @@
>  #include <drm/drm_modes.h>
>  #include <drm/drm_panel.h>
>  
> -#include <video/display_timing.h>
>  #include <video/mipi_display.h>
> -#include <video/of_display_timing.h>
> -#include <video/videomode.h>
>  
>  #define DCS_GET_ID1		0xda
>  #define DCS_GET_ID2		0xdb
> @@ -33,6 +30,18 @@
>  
>  #define DCS_REGULATOR_SUPPLY_NUM 2
>  
> +static const struct of_device_id dsicm_of_match[];
> +
> +struct dsic_panel_data {
> +	u32 xres;
> +	u32 yres;
> +	u32 refresh;
> +	u32 width_mm;
> +	u32 height_mm;
> +	u32 max_hs_rate;
> +	u32 max_lp_rate;
> +};
> +
>  struct panel_drv_data {
>  	struct mipi_dsi_device *dsi;
>  	struct drm_panel panel;
> @@ -48,16 +57,14 @@ struct panel_drv_data {
>  					 */
>  	unsigned long	hw_guard_wait;	/* max guard time in jiffies */
>  
> -	/* panel HW configuration from DT or platform data */
> +	const struct dsic_panel_data *panel_data;
> +
>  	struct gpio_desc *reset_gpio;
>  
>  	struct regulator_bulk_data supplies[DCS_REGULATOR_SUPPLY_NUM];
>  
>  	bool use_dsi_backlight;
>  
> -	int width_mm;
> -	int height_mm;
> -
>  	/* runtime variables */
>  	bool enabled;
>  
> @@ -455,11 +462,8 @@ static int dsicm_get_modes(struct drm_panel *panel,
>  		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;
> +	connector->display_info.width_mm = ddata->panel_data->width_mm;
> +	connector->display_info.height_mm = ddata->panel_data->height_mm;
>  
>  	drm_mode_probed_add(connector, mode);
>  
> @@ -476,15 +480,10 @@ static const struct drm_panel_funcs dsicm_panel_funcs = {
>  
>  static int dsicm_probe_of(struct mipi_dsi_device *dsi)
>  {
> -	struct device_node *node = dsi->dev.of_node;
>  	struct backlight_device *backlight;
>  	struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi);
> -	struct display_timing timing;
> -	struct videomode vm = {
> -		.hactive = 864,
> -		.vactive = 480,
> -	};
>  	int err;
> +	struct drm_display_mode *mode = &ddata->mode;
>  
>  	ddata->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
>  	if (IS_ERR(ddata->reset_gpio)) {
> @@ -493,23 +492,16 @@ static int dsicm_probe_of(struct mipi_dsi_device *dsi)
>  		return err;
>  	}
>  
> -	err = of_get_display_timing(node, "panel-timing", &timing);
> -	if (!err) {
> -		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);
> -
> -	ddata->height_mm = 0;
> -	of_property_read_u32(node, "height-mm", &ddata->height_mm);
> +	mode->hdisplay = mode->hsync_start = mode->hsync_end = mode->htotal =
> +		ddata->panel_data->xres;
> +	mode->vdisplay = mode->vsync_start = mode->vsync_end = mode->vtotal =
> +		ddata->panel_data->yres;
> +	mode->clock = ddata->panel_data->xres * ddata->panel_data->yres *
> +		ddata->panel_data->refresh / 1000;
> +	mode->width_mm = ddata->panel_data->width_mm;
> +	mode->height_mm = ddata->panel_data->height_mm;
> +	mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> +	drm_mode_set_name(mode);
>  
>  	ddata->supplies[0].supply = "vpnl";
>  	ddata->supplies[1].supply = "vddi";
> @@ -536,6 +528,7 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
>  	struct panel_drv_data *ddata;
>  	struct backlight_device *bldev = NULL;
>  	struct device *dev = &dsi->dev;
> +	const struct of_device_id *id;
>  	int r;
>  
>  	dev_dbg(dev, "probe\n");
> @@ -547,6 +540,12 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
>  	mipi_dsi_set_drvdata(dsi, ddata);
>  	ddata->dsi = dsi;
>  
> +	id = of_match_node(dsicm_of_match, dev->of_node);
> +	if (!id)
> +		return -ENODEV;
> +
> +	ddata->panel_data = id->data;
> +
>  	r = dsicm_probe_of(dsi);
>  	if (r)
>  		return r;
> @@ -583,8 +582,8 @@ static int dsicm_probe(struct mipi_dsi_device *dsi)
>  	dsi->format = MIPI_DSI_FMT_RGB888;
>  	dsi->mode_flags = MIPI_DSI_CLOCK_NON_CONTINUOUS |
>  			  MIPI_DSI_MODE_EOT_PACKET;
> -	dsi->hs_rate = 300000000;
> -	dsi->lp_rate = 10000000;
> +	dsi->hs_rate = ddata->panel_data->max_hs_rate;
> +	dsi->lp_rate = ddata->panel_data->max_lp_rate;
>  
>  	drm_panel_add(&ddata->panel);
>  
> @@ -622,8 +621,40 @@ static int dsicm_remove(struct mipi_dsi_device *dsi)
>  	return 0;
>  }
>  
> +static const struct dsic_panel_data taal_data = {
> +	.xres = 864,
> +	.yres = 480,
> +	.refresh = 60,
> +	.width_mm = 0,
> +	.height_mm = 0,
> +	.max_hs_rate = 300000000,
> +	.max_lp_rate = 10000000,
> +};
> +
> +static const struct dsic_panel_data himalaya_data = {
> +	.xres = 480,
> +	.yres = 864,
> +	.refresh = 60,
> +	.width_mm = 49,
> +	.height_mm = 88,
> +	.max_hs_rate = 300000000,
> +	.max_lp_rate = 10000000,
> +};
> +
> +static const struct dsic_panel_data droid4_data = {
> +	.xres = 540,
> +	.yres = 960,
> +	.refresh = 60,
> +	.width_mm = 50,
> +	.height_mm = 89,
> +	.max_hs_rate = 300000000,
> +	.max_lp_rate = 10000000,
> +};
> +
>  static const struct of_device_id dsicm_of_match[] = {
> -	{ .compatible = "panel-dsi-cm", },
> +	{ .compatible = "tpo,taal", .data = &taal_data },
> +	{ .compatible = "nokia,himalaya", &himalaya_data },
> +	{ .compatible = "motorola,droid4-panel", &droid4_data },
>  	{},
>  };
>  
> -- 
> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
> 
> _______________________________________________
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> dri-devel@lists.freedesktop.org
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