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EPDC "TCE underrun" with high resolution 3200x1200 on DualLite sabresd evaluation kit

Question asked by Yite Lee on Apr 28, 2015
Latest reply on Sep 6, 2016 by Nobuyuki Hayama

BSP: ICS 4.0.4 + EINK patch to enable EPDC functionality.

target board: SABRESD + DualLite  evaluation kit

 

Hi Guys~

I am using DualLite on E-Reader product, I got a problem when i replace panel parameters to my target resolution, 3200(source)x1200(gate), 85Hz FrameRate

then error message "imx_epdc_fb imx_epdc_fb: TCE underrun! Will continue to update panel" shown on the console print

, I have no idea how to solve this issue, can anyone help?

 

I only replace the setting used for E060SCM panel as following

struct fb_videomode
.name"e060scm_mode"
.refresh85
.xres3200
.yres1200
.pixclock240000000
.left_margin16
.right_margin693
.upper_margin12
.lower_margin8
.hsync_len16
.vsync_len12
.sync0
.vmodeFB_VMODE_NONINTERLACED
.flag0

 

struct mxc_epdc_fb_mode
struct fb_videomode *mode&e060scm_mode
vscan_holdoff10
sdoed_width10
sdoed_delay20
sdoez_width10
sdoez_delay20
GDCLK_HP1707
GDSP_OFF1350
GDOE_OFF0
gdclk_offs186
num_ce2

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