topic Re: RM67295 + IMX8MM in i.MX Processors

RM67295 + IMX8MM

qiaoweibiao — Sat, 16 May 2020 08:25:06 GMT

Now I use RM67295 to display,but there is just RM67191 in the source. So can I change the code of RM67191 to RM67295? If NXP have the code of RM67295 pls update it to the git .Thanks a lot

Re: RM67295 + IMX8MM

igorpadykov — Sat, 16 May 2020 23:12:33 GMT

Hi qiao

one can also consider rm67290 driver:

panel-raydium-rm68200.c\panel\drm\gpu\drivers - linux-imx - i.MX Linux kernel

add necessary changes to struct drm_display_mode default_mode = {.. ,

rm68200_init_sequence(struct .. *ctx)

Best regards
igor
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Re: RM67295 + IMX8MM

qiaoweibiao — Thu, 28 May 2020 17:49:30 GMT

Now I use the rm67191 to driver the LCD ,but there is something wrong with the display .just to see the pitcure.

and this is my timg:

.pixelclock = {60000000, 90000000,132000000},//1 // 31000000 62000000 61000000, 61500000,62000000
.hactive = { 720, 720, 720 },// 720, 720, 720
.hfront_porch = { 26, 26, 26 },//26, 26, 26 表示一行的有效数据结束到下一个水平同步信号开始之间的VCLK的个数
.hsync_len = { 2, 2, 2 },//111 222 水平同步的长度
.hback_porch = { 36, 36, 36},//36, 36, 36 20 20 20 表示从水平同步信号开始到一行的有效数据开始之间的VCLK的个数

.vactive = { 1280, 1280, 1280},//1280, 1280, 1280
.vfront_porch = { 8, 8, 8 },//8, 8, 8 表示在一帧图像结束后，垂直同步信号以前的无效的行数
.vsync_len = { 4, 4, 4 },// 444 64 64 64 垂直同步的长度
.vback_porch = { 16, 16, 16 },//16, 16, 16 表示在一帧图像开始时，垂直同步信号以后的无效的行数

.flags = DISPLAY_FLAGS_HSYNC_LOW |
DISPLAY_FLAGS_VSYNC_LOW |
DISPLAY_FLAGS_DE_LOW |
DISPLAY_FLAGS_PIXDATA_NEGEDGE,//DISPLAY_FLAGS_PIXDATA_NEGEDGE

Only I set the pixelclock =90Mhz It can work， If I change 90Mhz to 62Mhz[(720+26+2+36)*（1280+8+4+16)*60] there is nothing can display.PLS help me .THK ！And also tell me why just the 90Mhz rather than other *MHZ can work.

Re: RM67295 + IMX8MM

maxime_guillot — Tue, 04 May 2021 17:59:01 GMT

Hello,

Same problem here!

Is there a solution?

Thank you

Re: RM67295 + IMX8MM

Andrew_yang — Thu, 20 May 2021 02:56:06 GMT

I had the same problem，Is there a solution ？ @maxime_guillot @qiaoweibiao @igorpadykov thanks！

Re: RM67295 + IMX8MM

maxime_guillot — Mon, 24 May 2021 07:46:54 GMT

Hello,

I don't have the solution yet but it comes from NXP files like sec_mipi_dsim.c that is made ony for NXP display and do no take in charge others like 720x1280.

Thanks

Re: RM67295 + IMX8MM

Andrew_yang — Wed, 26 May 2021 12:08:53 GMT

Thank you for your answer. I'm still working on it

Re: RM67295 + IMX8MM

Andrew_yang — Fri, 28 May 2021 09:26:14 GMT

Hi，I have solved this problem by combining the following patch

MLK-21150-4 drm/bridge: sec-dsim: a general way to compute PLL PMS

@maxime_guillot

Re: RM67295 + IMX8MM

maxime_guillot — Thu, 03 Jun 2021 14:14:24 GMT

Thank you Andrew!

Re: RM67295 + IMX8MM

balogul — Tue, 21 Nov 2023 13:46:59 GMT

Hi,

Is there anyone who fixed this problem?

Thanks.