Need TFT LCD Driver support

If you are looking to interface new LCD panel to your board, you may want to check these:
drivers/video/omap/lcd_omap3evm.c
drivers/video/omap2/displays/panel-sharp-ls037v7dw01.c
arch/arm/mach-omap2/board-omap3evm.c

(I haven't checked to see if board-da850-evm.c has similar example, but based on your query I assume it doesn't)

Hi Sanjeev

Thanks for your reply

I am using AM1808 EVM which is supporting Davinci drivers. Our board is OMAPL138 supported architecture.OMAP2 architecture is different.

In AM1808 EVM development board existing TFT LCD using here as SHARP- LQ043T1DG01. My new LCD interface has Innolux AT050TN33.

I want to develop new LCD driver. Both data sheets looks same but pin configuration slightly will vary. Also the timing and synchronization is different.

I just want to know the modification and changes.

Regards,

Francis

Francis,

The files I pointed should indicate the changes for the panel driver. Other than the hook-up with the board, panel drivers are quite generic and don't depend on any processor.

It appears you are looking for specific changes that need to be done when using an interface different than the one provided with the EVM.

You have the datasheets for both the panels. You will need to make the appropriate changes yourself... unless someone (on these forums) is already using the specific panel and can share the driver/changes with you.

I am new to this LCD driver development running on linux and would appreciate anyone share the same driver source.

Please share it.

Thanks

Francis

Hi Sanjeev,

Can i have the same panel driver with changes.

Thanks

francis

Francis,

I am quite not sure about OMAPL138 or AM1808 driver status, but I believe Fbdev driver should have been supported already. Please refer to the Arago repository for latest releases- http://arago-project.org/git/projects/?p=linux-davinci.git;a=summary, refer to history of  "drivers/video/".

From your LCD panel perspective, you have to change the LCD configuration to your LCD panel timing parameter.

Thanks,

Vaibhav

Hi,

I made a changes in LCD configuration and LCD panel timing parameter. But i am not sure with these changes driver will work or not.

What i am using the LCD Panel doesn't have VSYNC and HSYNC supported signals. It is having DE(data enable signal) and clock. Remaining the same pin configuration of Sharp - LQ043T1DG01. Herewith I have attached the timing control diagram. Can you give me a driver source according to this logic.

Innolux LCD Pin configuration

1 VLED- P Power for LED backlight cathode
2 VLED+ P Power for LED backlight anode
3 GND P Power ground
4 VDD P Power voltage
5 R0 I Red data (LSB)
6 R1 I Red data
7 R2 I Red data
8 R3 I Red data
9 R4 I Red data
10 R5 I Red data
11 R6 I Red data
12 R7 I Red data (MSB)
13 G0 I Green data (LSB)
14 G1 I Green data
15 G2 I Green data
16 G3 I Green data
17 G4 I Green data
18 G5 I Green data
19 G6 I Green data

20 G7 I Green data (MSB)
21 B0 I Blue data (LSB)
22 B1 I Blue data
23 B2 I Blue data
24 B3 I Blue data
25 B4 I Blue data
26 B5 I Blue data
27 B6 I Blue data
28 B7 I Blue data (MSB)
29 GND P Power ground
30 CLK I Pixel clock
31 DISP I Display on/off
32 NC - No Connection
33 NC - No Connection
34 DE I Data Enable
35 NC - No Connection
36 GND P Power ground
37 X1 I/O Right electrode – differential analog
38 Y1 I/O Bottom electrode – differential analog
39 X2 I/O Left electrode – differential analog
40 Y2 I/O Top electrode – differential analog

Timing Diagram

Thanks,

Francis

Francis,

You have to write the driver on your own, I can help you in your understanding and other issues (upto certain extent). Neither I have readily available driver source for your panel to share with you nor I have a bandwidth to write a driver for you.

Thanks,

Vaibhav

Can you help me to share the readily available driver source for Innolux panel.

Thanks

Francis 

Hi Vaibhav,

Can you please share the readily available panel driver source.

Thanks

francis

Francis,

I do not have anything extra or more than what Sanjeev has shared with you before. Few additional pointers,

You have to refer to the existing OMAPL138/AM1808 driver (which I believe "drivers/video/da8xx-fb.c") and try to understand how panel timing parameters are hooked up OR being used,  and do same thing for you panel driver. It should be pretty easy to do.

Thanks,

Vaibhav

Hi,

I made a changes in LCD panel timing parameter (linux/drivers/video/da8xx-fb.c and Board, device files also) . Can i have some more information needs to add it here.

hi all,

I am working on the innoluc at07083 LCd display

I am using the panda board Es and  Expantion board with LCD pannel innolux_at07083

please any one tell the procedures to follow for interfacing and files tree to modify the code

source code flow for interfacing the innolux lcd display to panda board Es

and help me to understand the OMAP4460 interface with LCD pannel

Thanks ,

raj

Hello, i have the same LCD panel as you(Innolux - AT050TN33), could you help me with working with it?
Thanks,

Alexander

Hi Alex,

You have to change your customised LCD timing parameters under /drivers/video/da8xx-fb.c, which has mentioned the timing values under your LCD datsheet. Also you need to define the platform driver under board-da850-evm.c

Which platform you are working, SO that according to your board need to define all the platform definitions.

Thanks,

Francis

Hi Francis,

Thanks, i'll try.

But i have another question, is it needed to use some board-controller between lcd and my debug board, or i must connect lcd directly to particular pins on debug board?

P.S. My board is Bluetechnix eval-bf5xx and processor Blackfin bf537e

Thanks, Alex

Hi Alex,

Your board must have LCD controller support required. That too it require 18/24 bit support.

lets share your processor datasheet, i will confirm whether it have TFT LCD support or not..

Thanks,

Francis

Hi,
So, processor's datasheet's here http://datasheets.bluetechnix.at/goto/CM-BF537E/CM-BF537_HUM_V3.pdf
and here's board's datasheet if needed http://datasheets.bluetechnix.at/goto/EVAL-BF5xx/archive/V3.x/EVAL-BF5xx_HardwareUserManual_V3.1.pdf
And if doesn't support 18/24 bit transfer, i won't use the lowest bits. like R0, R1, G0, B0, B1