@6by9 Thank you a lot for looking at this.
I tried some dev_info inside vc4_dsi.c, here is the result of adjusted mode:
RGB888:
For reference, here is the timing information I got from the manufacturer of JT60849-01, it appears to be a newly developed panel in 2025 so no information online
I tried some dev_info inside vc4_dsi.c, here is the result of adjusted mode:
RGB888:
RGB565:[ 4.737557] vc4_dsi fe700000.dsi: pixel clock hz: 11363000
[ 4.737574] vc4_dsi fe700000.dsi: phy clock: 272736000
[ 4.737578] vc4_dsi fe700000.dsi: adjusted mode hdisplay: 320
[ 4.737582] vc4_dsi fe700000.dsi: adjusted mode hsync_start: 346
[ 4.737585] vc4_dsi fe700000.dsi: adjusted mode hsync_end: 356
[ 4.737588] vc4_dsi fe700000.dsi: adjusted mode htotal: 376
[ 4.737590] vc4_dsi fe700000.dsi: adjusted mode hskew: 0
[ 4.737593] vc4_dsi fe700000.dsi: adjusted mode vdisplay: 480
[ 4.737596] vc4_dsi fe700000.dsi: adjusted mode vsync_start: 492
[ 4.737598] vc4_dsi fe700000.dsi: adjusted mode vsync_end: 494
[ 4.737601] vc4_dsi fe700000.dsi: adjusted mode vtotal: 505
[ 4.737604] vc4_dsi fe700000.dsi: adjusted mode vscan: 0
256 clocks sounds like a very tight restriction for a panel that is designed to work at 320x480 resolution. If I change the mode resolution to something like 160x240 can I use a smaller area inside the panel? (might be worth trying)[ 4.271335] vc4_dsi fe700000.dsi: pixel clock hz: 11029000
[ 4.271359] vc4_dsi fe700000.dsi: phy clock: 176480000
[ 4.271363] vc4_dsi fe700000.dsi: adjusted mode hdisplay: 320
[ 4.271368] vc4_dsi fe700000.dsi: adjusted mode hsync_start: 334
[ 4.271371] vc4_dsi fe700000.dsi: adjusted mode hsync_end: 344
[ 4.271374] vc4_dsi fe700000.dsi: adjusted mode htotal: 364
[ 4.271377] vc4_dsi fe700000.dsi: adjusted mode hskew: 0
[ 4.271380] vc4_dsi fe700000.dsi: adjusted mode vdisplay: 480
[ 4.271383] vc4_dsi fe700000.dsi: adjusted mode vsync_start: 492
[ 4.271386] vc4_dsi fe700000.dsi: adjusted mode vsync_end: 494
[ 4.271389] vc4_dsi fe700000.dsi: adjusted mode vtotal: 505
[ 4.271393] vc4_dsi fe700000.dsi: adjusted mode vscan: 0
For reference, here is the timing information I got from the manufacturer of JT60849-01, it appears to be a newly developed panel in 2025 so no information online
Statistics: Posted by xiashj — Fri Aug 22, 2025 12:26 am