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From: Neil Armstrong <neil.armstrong@linaro.org>
To: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>,
	Luca Leonardo Scorcia <l.scorcia@gmail.com>
Cc: dri-devel@lists.freedesktop.org, Jagan Teki <jagan@edgeble.ai>,
	Jessica Zhang <jesszhan0024@gmail.com>,
	David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
	Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Conor Dooley <conor+dt@kernel.org>,
	Bjorn Andersson <bjorn.andersson@oss.qualcomm.com>,
	Marek Vasut <marex@nabladev.com>, Kael D'Alcamo <dev@kael-k.io>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 2/2] drm/panel: jd9365da: Support for Zhunyi Z40046 panels
Date: Fri, 24 Apr 2026 11:34:05 +0200	[thread overview]
Message-ID: <a98b6735-64b9-40a8-a52d-aef4b75f8261@linaro.org> (raw)
In-Reply-To: <gyacssx3h7oowxohwzeup7dvmtlrrm7oarb3zwne77rvfysxwd@cvlghspzfdcb>

On 4/22/26 21:28, Dmitry Baryshkov wrote:
> On Fri, Apr 17, 2026 at 11:46:31AM +0100, Luca Leonardo Scorcia wrote:
>> The Zhunyi Z40046 is a 480x800 24-bit WVGA DSI panel based on the
>> Fitipower JD9161Z DSI controller found in the Xiaomi Mi Smart Clock
>> x04g, apparently in two different variants.
>>
>> The Fitipower JD9161Z LCD driver IC is very similar to the Jadard
>> JD9365DA-H3, it just uses different initialization sequences.
>>
>> The two initialization sequences for the panel have been extracted from
>> Android original firmware for the Xiaomi Smart Clock.
>>
>> Variant -ctc uses a CTC LCD panel and has been tested on device.
>> Variant -boe uses a BOE LCD panel and has not been tested.

If it hasn't been tested, please remove it and add it when tested.

Neil

>>
>> Signed-off-by: Luca Leonardo Scorcia <l.scorcia@gmail.com>
>> ---
>>   .../gpu/drm/panel/panel-jadard-jd9365da-h3.c  | 313 ++++++++++++++++++
>>   1 file changed, 313 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c b/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c
>> index c33c611e03c0..7da064567248 100644
>> --- a/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c
>> +++ b/drivers/gpu/drm/panel/panel-jadard-jd9365da-h3.c
>> @@ -46,11 +46,22 @@ struct jadard {
>>   	struct gpio_desc *reset;
>>   };
>>   
>> +#define JD9161Z_DCS_SWITCH_PAGE		0xde
>> +
>> +#define jd9161z_switch_page(dsi_ctx, page) \
>> +	mipi_dsi_dcs_write_seq_multi(dsi_ctx, JD9161Z_DCS_SWITCH_PAGE, (page))
>> +
> 
> Just my 2c. The code looks similar, but it's true for large enough
> number of controllers. Please consider splitting this to a separate
> driver. It would result in a cleaner and easier to follow code for both
> of them.
> 
>>   #define JD9365DA_DCS_SWITCH_PAGE	0xe0
>>   
>>   #define jd9365da_switch_page(dsi_ctx, page) \
>>   	mipi_dsi_dcs_write_seq_multi(dsi_ctx, JD9365DA_DCS_SWITCH_PAGE, (page))
>>   
>> +static void jd9161z_enable_standard_cmds(struct mipi_dsi_multi_context *dsi_ctx)
>> +{
>> +	// Enable access to DCS and internal commands
>> +	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xdf, 0x91, 0x62, 0xf3);
>> +}
>> +
>>   static void jadard_enable_standard_cmds(struct mipi_dsi_multi_context *dsi_ctx)
>>   {
>>   	mipi_dsi_dcs_write_seq_multi(dsi_ctx, 0xe1, 0x93);
>> @@ -1606,6 +1617,300 @@ static const struct jadard_panel_desc taiguan_xti05101_01a_desc = {
>>   	.enter_sleep_to_reset_down_delay_ms = 100,
>>   };
>>   
>> +// Sequence retrieved from Xiaomi Mi Smart Clock x04g kernel in boot.bin
>> +static int zhunyi_z40046_init_cmds_ctc(struct jadard *jadard_data)
>> +{
>> +	struct mipi_dsi_multi_context dsi_ctx = { .dsi = jadard_data->dsi };
>> +
>> +	// Init configuration sequence
>> +	jd9161z_switch_page(&dsi_ctx, 0x00);
>> +	jd9161z_enable_standard_cmds(&dsi_ctx);
>> +
>> +	// GAMMA_SET (pos/neg voltage of gamma power)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb7,
>> +		0x10, 0x04, 0x86, 0x00, 0x1b, 0x35);
>> +
>> +	// DCDC_SEL (power mode and charge pump settings)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xbb,
>> +		0x69, 0x0b, 0x30, 0xb2, 0xb2, 0xc0, 0xe0, 0x20,
>> +		0xf0, 0x50, 0x60);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 1);
>> +
>> +	// VDDD_CTRL (control logic voltage setting)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xbc,
>> +		0x73, 0x14);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 1);
>> +
>> +	// SETRGBCYC (display waveform cycle of RGB mode)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc3,
>> +		0x74, 0x04, 0x08, 0x0e, 0x00, 0x0e, 0x0c, 0x08,
>> +		0x0e, 0x00, 0x0e, 0x82, 0x0a, 0x82);
>> +
>> +	// SET_TCON (timing control setting)
>> +	// param[0][5:4] + param[1]: number of panel lines / 2
>> +	//   400 = 01 1001 0000 -> 0x10, 0x90
>> +	// param[2]: scan line time width
>> +	// param[3]: vfp: 14
>> +	// param[4]: vs + vbp - 1: 11
>> +	// param[5]: hbp: 4
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc4,
>> +		0x10, 0x90, 0x92, 0x0e, 0x0b, 0x04);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 1);
>> +
>> +	// SET_R_GAMMA (set red gamma output voltage)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc8,
>> +		0x7e, 0x76, 0x68, 0x57, 0x4c, 0x39, 0x3a, 0x23,
>> +		0x3d, 0x3d, 0x40, 0x61, 0x54, 0x64, 0x5d, 0x62,
>> +		0x5a, 0x50, 0x32, 0x7e, 0x76, 0x68, 0x57, 0x4c,
>> +		0x39, 0x3a, 0x23, 0x3d, 0x3d, 0x40, 0x61, 0x54,
>> +		0x64, 0x5d, 0x62, 0x5a, 0x50, 0x32);
>> +
>> +	// SET_GIP_L (CGOUTx_L signal mapping, gs_panel = 0)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd0,
>> +		0x1f, 0x0a, 0x08, 0x06, 0x04, 0x1f, 0x00, 0x1f,
>> +		0x17, 0x1f, 0x18, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
>> +
>> +	// SET_GIP_R (CGOUTx_R signal mapping, gs_panel = 0)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd1,
>> +		0x1f, 0x0b, 0x09, 0x07, 0x05, 0x1f, 0x01, 0x1f,
>> +		0x17, 0x1f, 0x18, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
>> +
>> +	// SETGIP1 (GIP signal timing 1)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd4,
>> +		0x10, 0x00, 0x00, 0x03, 0x60, 0x05, 0x10, 0x00,
>> +		0x02, 0x06, 0x68, 0x00, 0x6c, 0x00, 0x00, 0x00,
>> +		0x00, 0x06, 0x78, 0x71, 0x07, 0x06, 0x68, 0x0c,
>> +		0x25, 0x00, 0x63, 0x03, 0x00);
>> +
>> +	// SETGIP2 (GIP signal timing 1)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd5,
>> +		0x20, 0x10, 0x8c, 0x18, 0x00, 0x80, 0x00, 0x08,
>> +		0x00, 0x00, 0x06, 0x60, 0x00, 0x81, 0x70, 0x02,
>> +		0x30, 0x01, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00,
>> +		0x03, 0x60, 0x83, 0x90, 0x00, 0x00, 0x03, 0x4f,
>> +		0x03, 0x00, 0x1f, 0x3f, 0x00, 0x00, 0x00, 0x00);
>> +
>> +	jd9161z_switch_page(&dsi_ctx, 0x04);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 1);
>> +
>> +	// Unknown command
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb0,
>> +		0x24, 0x01);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 1);
>> +
>> +	jd9161z_switch_page(&dsi_ctx, 0x02);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 1);
>> +
>> +	// SETRGBCYC2 (RGB IF source switch control timing)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc1,
>> +		0x71);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 1);
>> +
>> +	// Unknown command
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc2,
>> +		0x00, 0x18, 0x08, 0x1e, 0x25, 0x7c, 0xc7);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 1);
>> +
>> +	jd9161z_switch_page(&dsi_ctx, 0x00);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 1);
>> +
>> +	mipi_dsi_dcs_set_tear_on_multi(&dsi_ctx, MIPI_DSI_DCS_TEAR_MODE_VBLANK);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 1);
>> +
>> +	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 120);
>> +
>> +	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 5);
>> +
>> +	return dsi_ctx.accum_err;
>> +};
>> +
>> +static const struct jadard_panel_desc zhunyi_z40046_ctc_desc = {
>> +	.mode = {
>> +		.clock		= (480 + 20 + 20 + 20) * (800 + 14 + 4 + 8) * 60 / 1000,
>> +
>> +		.hdisplay	= 480,
>> +		.hsync_start	= 480 + 20,
>> +		.hsync_end	= 480 + 20 + 20,
>> +		.htotal		= 480 + 20 + 20 + 20,
>> +
>> +		.vdisplay	= 800,
>> +		.vsync_start	= 800 + 14,
>> +		.vsync_end	= 800 + 14 + 4,
>> +		.vtotal		= 800 + 14 + 4 + 8,
>> +
>> +		.width_mm	= 52,
>> +		.height_mm	= 86,
>> +		.flags		= DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
>> +		.type		= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
>> +	},
>> +	.lanes = 2,
>> +	.format = MIPI_DSI_FMT_RGB888,
>> +	.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
>> +		MIPI_DSI_MODE_LPM,
>> +	.lp11_before_reset = true,
>> +	.reset_before_power_off_vcioo = true,
>> +	.vcioo_to_lp11_delay_ms = 5,
>> +	.lp11_to_reset_delay_ms = 10,
>> +	.backlight_off_to_display_off_delay_ms = 100,
>> +	.display_off_to_enter_sleep_delay_ms = 50,
>> +	.enter_sleep_to_reset_down_delay_ms = 100,
>> +	.init = zhunyi_z40046_init_cmds_ctc,
>> +};
>> +
>> +// Sequence retrieved from Xiaomi Mi Smart Clock x04g kernel in boot.bin
>> +static int zhunyi_z40046_init_cmds_boe(struct jadard *jadard_data)
>> +{
>> +	struct mipi_dsi_multi_context dsi_ctx = { .dsi = jadard_data->dsi };
>> +
>> +	// Init configuration sequence
>> +	jd9161z_switch_page(&dsi_ctx, 0x00);
>> +	jd9161z_enable_standard_cmds(&dsi_ctx);
>> +
>> +	// GAMMA_SET (pos/neg voltage of gamma power)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xb7,
>> +		0x10, 0x08, 0x42, 0x00, 0x56, 0x42);
>> +
>> +	// DCDC_SEL (power mode and charge pump settings)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xbb,
>> +		0x52, 0x0f, 0xb2, 0xb2, 0xb2, 0xc0, 0xd0, 0x50,
>> +		0xf0, 0x40, 0x50);
>> +
>> +	// VDDD_CTRL (control logic voltage setting)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xbc,
>> +		0x73, 0x14);
>> +
>> +	// SETRGBCYC (display waveform cycle of RGB mode)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc3,
>> +		0x04, 0x07, 0x0b, 0x17, 0x00, 0x17, 0x04, 0x17,
>> +		0x17, 0x00, 0x17, 0x82, 0x0b, 0x82);
>> +
>> +	// SET_TCON (timing control setting)
>> +	// param[0][5:4] + param[1]: number of panel lines / 2
>> +	//   400 = 01 1001 0000 -> 0x10, 0x90
>> +	// param[2]: scan line time width
>> +	// param[3]: vfp: 14
>> +	// param[4]: vs + vbp - 1: 11
>> +	// param[5]: hbp: 6
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc4,
>> +		0x10, 0x90, 0x92, 0x0e, 0x06);
>> +
>> +	// SET_R_GAMMA (set red gamma output voltage)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc8,
>> +		0x7f, 0x78, 0x69, 0x56, 0x47, 0x33, 0x34, 0x1e,
>> +		0x3b, 0x3e, 0x43, 0x67, 0x5d, 0x6f, 0x68, 0x70,
>> +		0x6a, 0x61, 0x3c, 0x7f, 0x78, 0x69, 0x56, 0x47,
>> +		0x33, 0x34, 0x1e, 0x3b, 0x3e, 0x43, 0x67, 0x5d,
>> +		0x6f, 0x68, 0x70, 0x6a, 0x61, 0x3c);
>> +
>> +	// SET_GIP_L (CGOUTx_L signal mapping, gs_panel = 0)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd0,
>> +		0x1f, 0x1e, 0x07, 0x05, 0x01, 0x1f, 0x1f, 0x1f,
>> +		0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
>> +
>> +	// SET_GIP_R (CGOUTx_R signal mapping, gs_panel = 0)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd1,
>> +		0x1f, 0x1e, 0x06, 0x04, 0x00, 0x1f, 0x1f, 0x1f,
>> +		0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
>> +
>> +	// SET_GIP_L_GS (CGOUTx_L signal mapping, gs_panel = 1)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd2,
>> +		0x1f, 0x1f, 0x04, 0x06, 0x00, 0x1e, 0x1f, 0x1f,
>> +		0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
>> +
>> +	// SET_GIP_R_GS (CGOUTx_R signal mapping, gs_panel = 1)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd3,
>> +		0x1f, 0x1f, 0x05, 0x07, 0x01, 0x1e, 0x1f, 0x1f,
>> +		0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f);
>> +
>> +	// SETGIP1 (GIP signal timing 1)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd4,
>> +		0x30, 0x00, 0x00, 0x00, 0x00, 0x01, 0x10, 0x00,
>> +		0x03, 0x03, 0x68, 0x03, 0x40, 0x05, 0x00, 0x00,
>> +		0x00, 0xcc, 0x2d, 0x31, 0x02, 0x03, 0x68, 0x0c,
>> +		0x25, 0x00, 0x63, 0x03, 0x00);
>> +
>> +	// SETGIP2 (GIP signal timing 1)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xd5,
>> +		0x30, 0x08, 0x80, 0x18, 0x00, 0x00, 0x00, 0x18,
>> +		0x00, 0x00, 0x06, 0x60, 0x00, 0x07, 0x50, 0x00,
>> +		0x33, 0xc0, 0x00, 0x60, 0xc0, 0x00, 0x00, 0x00,
>> +		0x03, 0x60, 0x06, 0x10, 0x00, 0x00, 0x0f, 0x4f,
>> +		0x00, 0x10, 0x1f, 0x3f);
>> +
>> +	jd9161z_switch_page(&dsi_ctx, 0x02);
>> +
>> +	// SETRGBCYC2 (RGB IF source switch control timing)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc1,
>> +		0x60);
>> +
>> +	// Unknown command
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xc2,
>> +		0x00, 0x18, 0x08, 0x1e, 0x25, 0x7c, 0xc7);
>> +
>> +	jd9161z_switch_page(&dsi_ctx, 0x00);
>> +
>> +	// GAS_CTRL (GAS function control)
>> +	mipi_dsi_dcs_write_seq_multi(&dsi_ctx, 0xbe,
>> +		0x4e);
>> +
>> +	mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 120);
>> +
>> +	mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
>> +
>> +	mipi_dsi_msleep(&dsi_ctx, 10);
>> +
>> +	return dsi_ctx.accum_err;
>> +};
>> +
>> +static const struct jadard_panel_desc zhunyi_z40046_boe_desc = {
>> +	.mode = {
>> +		.clock		= (480 + 20 + 20 + 20) * (800 + 14 + 4 + 8) * 60 / 1000,
>> +
>> +		.hdisplay	= 480,
>> +		.hsync_start	= 480 + 20,
>> +		.hsync_end	= 480 + 20 + 20,
>> +		.htotal		= 480 + 20 + 20 + 20,
>> +
>> +		.vdisplay	= 800,
>> +		.vsync_start	= 800 + 14,
>> +		.vsync_end	= 800 + 14 + 4,
>> +		.vtotal		= 800 + 14 + 4 + 8,
>> +
>> +		.width_mm	= 52,
>> +		.height_mm	= 86,
>> +		.flags		= DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
>> +		.type		= DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
>> +	},
>> +	.lanes = 2,
>> +	.format = MIPI_DSI_FMT_RGB888,
>> +	.mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE |
>> +		MIPI_DSI_MODE_LPM,
>> +	.lp11_before_reset = true,
>> +	.reset_before_power_off_vcioo = true,
>> +	.vcioo_to_lp11_delay_ms = 5,
>> +	.lp11_to_reset_delay_ms = 10,
>> +	.backlight_off_to_display_off_delay_ms = 100,
>> +	.display_off_to_enter_sleep_delay_ms = 50,
>> +	.enter_sleep_to_reset_down_delay_ms = 100,
>> +	.init = zhunyi_z40046_init_cmds_boe,
>> +};
>> +
>>   static int jadard_dsi_probe(struct mipi_dsi_device *dsi)
>>   {
>>   	struct device *dev = &dsi->dev;
>> @@ -1707,6 +2012,14 @@ static const struct of_device_id jadard_of_match[] = {
>>   		.compatible = "taiguanck,xti05101-01a",
>>   		.data = &taiguan_xti05101_01a_desc
>>   	},
>> +	{
>> +		.compatible = "zhunyikeji,z40046-ctc",
>> +		.data = &zhunyi_z40046_ctc_desc
>> +	},
>> +	{
>> +		.compatible = "zhunyikeji,z40046-boe",
>> +		.data = &zhunyi_z40046_boe_desc
>> +	},
>>   	{ /* sentinel */ }
>>   };
>>   MODULE_DEVICE_TABLE(of, jadard_of_match);
>> -- 
>> 2.43.0
>>
> 


      reply	other threads:[~2026-04-24  9:34 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-04-17 10:46 [PATCH v2 0/2] Add support for Zhunyi Z40046 LCD panel Luca Leonardo Scorcia
2026-04-17 10:46 ` [PATCH v2 1/2] dt-bindings: display: panel: Add compatibles for Zhunyi Z40046 Luca Leonardo Scorcia
2026-04-17 16:19   ` Conor Dooley
2026-04-17 10:46 ` [PATCH v2 2/2] drm/panel: jd9365da: Support for Zhunyi Z40046 panels Luca Leonardo Scorcia
2026-04-22 19:28   ` Dmitry Baryshkov
2026-04-24  9:34     ` Neil Armstrong [this message]

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