Messages in this thread | | | From | Heiko Stuebner <> | Subject | Re: [PATCH] clk: rockchip: rk3288: prefer vdpu for vcodec clock source | Date | Sun, 14 May 2017 17:06:19 +0200 |
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Hi Randy,
Am Sonntag, 14. Mai 2017, 14:50:09 CEST schrieb Randy Li: > The RK3288 CRU system clock solution would suggest use > the vdpu clock source for the VPU(aclk_vpu and hclk_vpu). > > Reading the registers of VPU(both VEPU and VDPU) would become all high > when the vepu is used as the clock source. It may be a bug in the SoC, > not sure whether it is fixed at RK3288W.
I don't think that is a case of "preference". GRF_SOC_CON0[7] indicates that value 0 means vepu gets selected as vcodec clock and value 1 means vdpu gets selected as vcodec.
The array values below are supposed to match these values, so array index 0 represents the clock for value 0 and so on. So this is really only a description of the hardware clock layout.
If you want to actually switch the mux value, please assign the vcodec clock an id and use the assigned-clocks mechanism in the devicetree.
Heiko
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