AM5728: DSP and IVA DPLL configuration

The factory team have been notified. They will respond here.

Nomo,

The Power and Clock domains are fully configurable through register accesses.  I will forward this to an expect in this control.

Tom

Hello Tom-san,

Thank you for your reply.
My customers want to know the procedure to stop DSP and IVA on the evaluation board (TMDSEVM572X).
Could you let me know the simplest way (e.g. sysfs) to stop DSP and IVA?

Best Regards,
Nomo

Hi,

Are you use CCS GEL, Processor SDK RTOS or Linux? The simplest way is in the CCS GEL, AM572x_PRCM_Module_AllEnable_Config(), remove the entry for DSP1, DSP2, IVA PRCM clock:

prcm_set_clkdomain_state(DSP1_CM_CORE_AON, DSP1_CM_CORE_AON__CM_DSP1_CLKSTCTRL, SW_WKUP );
prcm_set_clkdomain_state(DSP2_CM_CORE_AON, DSP2_CM_CORE_AON__CM_DSP2_CLKSTCTRL, SW_WKUP );
prcm_set_clkdomain_state(IVA_CM_CORE, IVA_CM_CORE__CM_IVA_CLKSTCTRL, SW_WKUP );

prcm_set_proc_mode(IVA_CM_CORE, IVA_CM_CORE__CM_IVA_SL2_CLKCTRL, MODE_AUTO );
prcm_set_proc_mode(IVA_CM_CORE, IVA_CM_CORE__CM_IVA_IVA_CLKCTRL, MODE_AUTO );

Regards, Eric

Hello Eric-san,

Thank you for your reply.

My customers are considering the system that DSP doesn't activate in Linux.
Therefore, u-boot or dts settings will be needed for them.
Could you tell me the point should be modified in u-boot or dts.

Best Regards,
Nomo

Nomo,

Thanks! I will ask our Linux team for help!

Regards, Eric

For u-boot try removing the iva entry in hw_data.c so that it looks like this

struct dplls dra7xx_dplls = {
        .mpu = mpu_dpll_params_1ghz,
        .core = core_dpll_params_2128mhz_dra7xx,
        .per = per_dpll_params_768mhz_dra7xx,
        .abe = abe_dpll_params_sysclk2_361267khz,
        .iva = iva_dpll_params_2330mhz_dra7xx,
        .usb = usb_dpll_params_1920mhz,
        .ddr = ddr_dpll_params_2128mhz,
        .gmac = gmac_dpll_params_2000mhz,
};

The dsp does not get enabled in u-boot. I am looking at the kernel now and will post what to do there.

Steve K.

Hello Steve-san,

Thank you for your kind support.
I'll check your advices.

Best Regards,
Nomo

Did you make the changes I suggested and did they work?

Steve K.

Hello Steve-san,

Thank you for your message.
My customers closed this questoin, so it looks like they work properly by your advice.
If they make additional question, I'll post a new thread.

Best Regards,
Nomo