| Message ID | 20180828185513.13216-1-urjaman@gmail.com |
|---|---|
| Headers | show |
| Series | rk3288 veyron chromebook hdmi frequencies | expand |
Am Dienstag, 28. August 2018, 20:55:07 CEST schrieb Urja Rannikko: > Add and correct PLL rates for better hdmi output. > > This includes minimizing jitter on 213 MHz for better 71 MHz, > 250.5 MHz for better 83.5 MHz, 428 MHz for better 25.175 Mhz, > low jitter 273 MHz for better 68.25 mhz, 356 MHz for better 118.68 Mhz > and 300MHz. > > Increase the used Fvco for 308, 324 MHz, 292.5 MHz, 273.6 MHz, > 238 MHz and 216 MHz. > > And add some additional rates allowing to reach better hdmi-related > rates in general. > > These match the rates used by ChromeOS, so have been quite widely tested. > > Signed-off-by: Urja Rannikko <urjaman@gmail.com> applied for 4.20 Thanks Heiko
Hi all, This is a series trying to make the "hack" of dedicating a pll (npll) on these chromebooks to one of the VOPs (that is used for HDMI) more acceptable for upstream. Notably it should change nothing for non-chromebook rk3288 designs, and allows enough configurability that such designs could later use this feature for either VOP if it is desirable. I expect the first patch to be acceptable (atleast almost) as-is. It just adds the PLL frequencies used for HDMI into the PLL configuration list, so they're ready to be used for hdmi whether by fixed configuration, automagic magicness or dedicating a PLL. For the device tree bindings, I added a binding for the list of allowed hdmi frequencies (that quite closely a hardware property both due to EMI/RF considerations and clock/PLL configuration...) as "rockchip,hdmi-rates-hz" but i think this could have a common name. Suggestions? This has been tested on my ASUS C201, and effectively gives the same display compatibility as ChromeOS has. (This journey started with me plugging in my 1920x1200 samsung 2443BW and getting 1280x1024 at 55.555... Hz.) Urja Rannikko (7): clk: rockchip: improve rk3288 pll rates for better hdmi output dt-bindings: clock: rk3288-cru: Add property to dedicate NPLL for VOPx drivers: clk-rk3288: support for dedicating NPLL to a VOP dt-bindings: display/rockchip: dw_hdmi: Add property for HDMI frequency list drm: dw_hdmi-rockchip: better clock selection logic and dts-based rate list dts: rk3288: support for dedicating npll to a vop dts: rk3288-veyron-chromebook: dedicate npll to VOP0/HDMI + HDMI rates .../bindings/clock/rockchip,rk3288-cru.txt | 3 + .../display/rockchip/dw_hdmi-rockchip.txt | 1 + .../boot/dts/rk3288-veyron-chromebook.dtsi | 67 +++++ arch/arm/boot/dts/rk3288.dtsi | 6 +- drivers/clk/rockchip/clk-rk3288.c | 98 +++++-- drivers/clk/rockchip/clk.h | 3 + drivers/gpu/drm/rockchip/dw_hdmi-rockchip.c | 269 ++++++++++++------ 7 files changed, 335 insertions(+), 112 deletions(-)