Blur Busters Forums

I don't know if phone screen overclocking is being talked about there, so sorry if it isn't
I've overclocked galaxy j6 screen from 60 to 120 hz; that resulted in worse colors, but everything is much smoother
I had to change a few values in dts files, some of which I don't know what are doing
1. timing,pms = <1 77 2>; - I needed to increase second value to 140 so that 120hz works properly; it seems to affect colors even without increasing pixel clock;
setting it too low compared to pixel clock makes screen either go black with random gray lines or have only part of the screen working with the other being VERY distorted;
setting it too high(probably near hardware limit; 190-200+) results in screen artifacts.
I have no idea what do those values do
In kernel source they seem to be put somewhat like this:
timing_pms.p = 1
timing_pms.m = 77
timing_pms.s = 2
2. timing,dsi-hs-clk = <500> - seems to have no effect whatsoever
3. timing,dsi-escape-clk = <16> - ?
4. disp-eclk=<200000000> - ?
5. disp-dvfs=<200000> - ?

This is pretty interesting, overclocking an Android smartphones' screen.

The reduced time in refreshtime per pixel degrades colors, so you may need to use a filter app to adjust the gamma / brightness / contrast. In theory, a software-based overdrive can really help reduce increased ghosting (asymmetric blur trailbehind/trailahead effects) but that's not practical on a budget phones' GPU budget, and no apps exist to do this (at this time)

When I set the resolution to be lower than the display's, it displayed only the part of the screen that is the same resolution, with this part being refreshed faster(When I set screen resolution to 986x480 instead of 1480x720, the screen had like 250-270hz instead of 120hz) and having even worse colors, all values except resolution were the same
So the value that controls pixel refresh time is linked to resolution? Seems weird that I can't overclock the entire screen to 270hz, with it starting to tear at around 126hz, display controller limits?

Now I've noticed that colors randomly change when I'm changing brightness with 120hz patch
On 60hz it doesn't happen and brightness works fine
Maybe pwm?
Also, everything is much "brighter" with 120hz

SermisterOne wrote: ↑

26 Nov 2024, 13:57

Now I've noticed that colors randomly change when I'm changing brightness with 120hz patch
On 60hz it doesn't happen and brightness works fine
Maybe pwm?
Also, everything is much "brighter" with 120hz

Random glitches can happen throughout an overclocked chip, it's par for the course.

You'll also need an additional panel-level software-based brightness/contrast/gamma filter to compensate for the panel color crapping that occurs. Get one of those adjustment apps that doesn't affect the backlight, but manipulates the pixels of the onscreen framebuffer used for the panel. Like one of those night-night apps, or color-blind filter apps, except adds picture adjustments like gamma curve adjustment.