[EXT] Re: [v2 06/10] drm: bridge: cadence: Add MHDP HDMI driver for i.MX8MQ

Alexander Stein alexander.stein at ew.tq-group.com
Thu Nov 10 15:43:33 UTC 2022


Hi Sandor,

Am Mittwoch, 9. November 2022, 14:26:14 CET schrieb Sandor Yu:
> Thanks for your comments.
> 
> 
> > -----Original Message-----
> > From: Alexander Stein <alexander.stein at ew.tq-group.com>
> > Sent: 2022年11月8日 21:17
> > To: jonas at kwiboo.se; Sandor Yu <sandor.yu at nxp.com>
> > Cc: dri-devel at lists.freedesktop.org; devicetree at vger.kernel.org;
> > linux-arm-kernel at lists.infradead.org; linux-kernel at vger.kernel.org;
> > linux-phy at lists.infradead.org; andrzej.hajda at intel.com;
> > neil.armstrong at linaro.org; robert.foss at linaro.org;
> > Laurent.pinchart at ideasonboard.com; jernej.skrabec at gmail.com;
> > kishon at ti.com; vkoul at kernel.org; Oliver Brown <oliver.brown at nxp.com>;
> > krzysztof.kozlowski+dt at linaro.org; sam at ravnborg.org;
> > jani.nikula at intel.com;
 tzimmermann at suse.de; s.hauer at pengutronix.de;
> > javierm at redhat.com;
> > penguin-kernel at i-love.sakura.ne.jp; robh+dt at kernel.org; dl-linux-imx
> > <linux-imx at nxp.com>; kernel at pengutronix.de; Sandor Yu
> > <sandor.yu at nxp.com>; shawnguo at kernel.org; p.yadav at ti.com;
> > maxime at cerno.tech
> > Subject: [EXT] Re: [v2 06/10] drm: bridge: cadence: Add MHDP HDMI driver
> > for i.MX8MQ
> > 
> > Caution: EXT Email
> > 
> > Hello,
> > 
> > thanks for working on this and the updated version.
> > 
> > Am Freitag, 4. November 2022, 07:44:56 CET schrieb Sandor Yu:
> > 
> > > Add a new DRM HDMI bridge driver for Candence MHDP used in i.MX8MQ
> > > SOC. MHDP IP could support HDMI or DisplayPort standards according
> > > embedded Firmware running in the uCPU.
> > >
> > >
> > >
> > > For iMX8MQ SOC, the HDMI FW was loaded and activated by SOC ROM
> > 
> > code.
> > 
> > > Bootload binary included HDMI FW was required for the driver.
> > >
> > >
> > >
> > > Signed-off-by: Sandor Yu <Sandor.yu at nxp.com>
> > > ---
> > > 
> > >  drivers/gpu/drm/bridge/cadence/Kconfig        |   12 +
> > >  .../gpu/drm/bridge/cadence/cdns-hdmi-core.c   | 1038
> > 
> > +++++++++++++++++
> > 
> > >  2 files changed, 1050 insertions(+)
> > >  create mode 100644 drivers/gpu/drm/bridge/cadence/cdns-hdmi-core.c
> > >
> > >
> > >
> > > diff --git a/drivers/gpu/drm/bridge/cadence/Kconfig
> > > b/drivers/gpu/drm/bridge/cadence/Kconfig index
> > > e79ae1af3765..377452d09992
> > > 100644
> > > --- a/drivers/gpu/drm/bridge/cadence/Kconfig
> > > +++ b/drivers/gpu/drm/bridge/cadence/Kconfig

[snip]

> > > +static int cdns_hdmi_get_edid_block(void *data, u8 *edid,
> > > +                       u32 block, size_t length) {
> > > +     struct cdns_mhdp_device *mhdp = data;
> > > +     u8 msg[2], reg[5], i;
> > > +     int ret;
> > > +
> > > +     mutex_lock(&mhdp->mbox_mutex);
> > > +
> > > +     for (i = 0; i < 4; i++) {
> > 
> > 
> > What is i? It is not used inside the loop.
> 
> EDID data read by HDMI firmware are not guarantee 100% successful.
> Base on experiments, try 4 times if EDID read failed.

Mh, 4 times sounds a bit too arbitrary to me. How about using a timeout in ms, 
like 50ms, for retrying to read the EDID?

[snip]

> > > +static int cdns_mhdp_imx_probe(struct platform_device *pdev) {
> > > +     struct device *dev = &pdev->dev;
> > > +     struct cdns_mhdp_device *mhdp;
> > > +     struct platform_device_info pdevinfo;
> > > +     struct resource *res;
> > > +     u32 reg;
> > > +     int ret;
> > > +
> > > +     mhdp = devm_kzalloc(dev, sizeof(*mhdp), GFP_KERNEL);
> > > +     if (!mhdp)
> > > +             return -ENOMEM;
> > > +
> > > +     mutex_init(&mhdp->lock);
> > > +     mutex_init(&mhdp->mbox_mutex);
> > > +
> > > +     INIT_DELAYED_WORK(&mhdp->hotplug_work, hotplug_work_func);
> > > +
> > > +     res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > > +     if (!res)
> > > +             return -ENODEV;
> > > +     mhdp->regs = devm_ioremap(dev, res->start, resource_size(res));
> > > +     if (IS_ERR(mhdp->regs))
> > > +             return PTR_ERR(mhdp->regs);
> > 
> > 
> > Please use devm_platform_get_and_ioremap_resource.
> 
> Both HDMI PHY driver and mhdp HDMI driver should access same APB base
> register offset for mailbox.
 devm_ioremap_resource could not support such
> feature.

Oh I see, both remap the same range. To be honest I do not like this. Is there 
a need to map overlapping ranges in both drivers? How can you avoid race 
conditions due to simultaneous accesses?

> > > +     mhdp->phy = devm_of_phy_get_by_index(dev, pdev->dev.of_node,
> > 
> > 0);
> > 
> > > +     if (IS_ERR(mhdp->phy)) {
> > > +             dev_err(dev, "no PHY configured\n");
> > > +             return PTR_ERR(mhdp->phy);
> > > +     }
> > 
> > 
> > Please use dev_err_probe().
> 
> OK.
> 
> > 
> > 
> > > +     mhdp->irq[IRQ_IN] = platform_get_irq_byname(pdev, "plug_in");
> > > +     if (mhdp->irq[IRQ_IN] < 0) {
> > > +             dev_info(dev, "No plug_in irq number\n");
> > > +             return -EPROBE_DEFER;
> > > +     }
> > 
> > 
> > Please use dev_err_probe().
> 
> OK.
> 
> > 
> > 
> > > +     mhdp->irq[IRQ_OUT] = platform_get_irq_byname(pdev,
> > 
> > "plug_out");
> > 
> > > +     if (mhdp->irq[IRQ_OUT] < 0) {
> > > +             dev_info(dev, "No plug_out irq number\n");
> > > +             return -EPROBE_DEFER;
> > > +     }
> > 
> > 
> > Please use dev_err_probe().
> 
> OK.
> 
> > 
> > 
> > > +     /*
> > > +      * Wait for the KEEP_ALIVE "message" on the first 8 bits.
> > > +      * Updated each sched "tick" (~2ms)
> > > +      */
> > > +     ret = readl_poll_timeout(mhdp->regs + KEEP_ALIVE, reg,
> > > +                              reg & CDNS_KEEP_ALIVE_MASK,
> > 
> > 500,
> > 
> > > +                              CDNS_KEEP_ALIVE_TIMEOUT);
> > 
> > 
> > This freezes my board TQMa8MQ
> > (arch/arm64/boot/dts/freescale/imx8mq-tqma8mq-
> > mba8mx.dts) completly if this and the PHY driver are compiled in. I have
> > "pd_ignore_unused clk_ignore_unused" passed to kernel command line, so I
> > have no idea what's wrong here.
> 
> Here is the first time in the driver to access hdmi register when driver
> probe.
 For imx8mq hdmi/dp, mdhp hdmi apb clock and core clock are managed
> by ROM code, they are always on when device bootup. Could you dump the
> clock tree without "pd_ignore_unused clk_ignore_unused" ?

I noticed too this is the 1st access, so I have no idea what's wrong here. 
Here is my /sys/kernel/debug/clk/clk_summary from using the regular DT without 
enabling 'dcss', 'hdmi_phy' and 'mhdp_hdmi':

                                 enable  prepare  protect                                
duty  hardware
   clock                          count    count    count        rate   
accuracy phase  cycle    enable
-------------------------------------------------------------------------------------------------------
 sys2_pll_out                         7        7        0  1000000000          
0     0  50000         Y
    sys_pll2_out_monitor              0        0        0  1000000000          
0     0  50000         Y
    sys2_pll_1000m                    0        0        0  1000000000          
0     0  50000         Y
    sys2_pll_500m                     1        2        0   500000000          
0     0  50000         Y
       audio_ahb                      0        1        0   500000000          
0     0  50000         N
          ipg_audio_root              0        1        0   250000000          
0     0  50000         Y
             sdma2_clk                0        2        0   250000000          
0     0  50000         N
             sai6_ipg_clk             0        0        0   250000000          
0     0  50000         N
             sai5_ipg_clk             0        0        0   250000000          
0     0  50000         N
             sai4_ipg_clk             0        0        0   250000000          
0     0  50000         N
             sai1_ipg_clk             0        0        0   250000000          
0     0  50000         N
       nand                           0        0        0   500000000          
0     0  50000         N
          nand_root_clk               0        0        0   500000000          
0     0  50000         N
       usb_bus                        2        2        0   500000000          
0     0  50000         Y
          usb2_ctrl_root_clk          1        1        0   500000000          
0     0  50000         Y
          usb1_ctrl_root_clk          1        1        0   500000000          
0     0  50000         Y
    sys2_pll_333m                     1        1        0   333333333          
0     0  50000         Y
       main_axi                       1        1        0   333333333          
0     0  50000         Y
    sys2_pll_250m                     2        2        0   250000000          
0     0  50000         Y
       pcie1_ctrl                     1        1        0   250000000          
0     0  50000         Y
          pcie1_root_clk              1        1        0   250000000          
0     0  50000         Y
       pcie2_ctrl                     1        1        0   250000000          
0     0  50000         Y
          pcie2_root_clk              1        1        0   250000000          
0     0  50000         Y
    sys2_pll_200m                     3        3        0   200000000          
0     0  50000         Y
       ecspi3                         0        0        0   200000000          
0     0  50000         N
          ecspi3_root_clk             0        0        0   200000000          
0     0  50000         N
       ecspi2                         1        1        0   200000000          
0     0  50000         Y
          ecspi2_root_clk             2        2        0   200000000          
0     0  50000         Y
       ecspi1                         1        1        0   200000000          
0     0  50000         Y
          ecspi1_root_clk             2        2        0   200000000          
0     0  50000         Y
       gic                            1        1        0   200000000          
0     0  50000         Y
       arm_m4_core                    0        0        0   200000000          
0     0  50000         N
    sys2_pll_166m                     0        0        0   166666666          
0     0  50000         Y
    sys2_pll_125m                     1        1        0   125000000          
0     0  50000         Y
       enet_ref                       1        1        0   125000000          
0     0  50000         Y
    sys2_pll_100m                     3        3        0   100000000          
0     0  50000         Y
       pcie1_phy                      1        1        0   100000000          
0     0  50000         Y
       pcie2_phy                      1        1        0   100000000          
0     0  50000         Y
       enet_timer                     1        1        0   100000000          
0     0  50000         Y
    sys2_pll_50m                      1        1        0    50000000          
0     0  50000         Y
       enet_phy                       1        1        0    50000000          
0     0  50000         Y
 sys1_pll_out                         5        5        0   800000000          
0     0  50000         Y
    sys_pll1_out_monitor              0        0        0   800000000          
0     0  50000         Y
    sys1_pll_800m                     2        2        0   800000000          
0     0  50000         Y
       vpu_bus                        0        0        0   800000000          
0     0  50000         N
          vpu_dec_root_clk            0        0        0   800000000          
0     0  50000         N
       arm_a53_div                    0        0        0   800000000          
0     0  50000         N
       dram_apb                       1        1        0   160000000          
0     0  50000         Y
       noc                            1        1        0   800000000          
0     0  50000         Y
       disp_rtrm                      0        0        0   400000000          
0     0  50000         N
          disp_rtrm_root_clk          0        0        0   400000000          
0     0  50000         N
       disp_apb                       0        0        0   133333334          
0     0  50000         N
          disp_apb_root_clk           0        0        0   133333334          
0     0  50000         N
       disp_axi                       0        0        0   800000000          
0     0  50000         N
          disp_axi_root_clk           0        0        0   800000000          
0     0  50000         N
    sys1_pll_400m                     0        0        0   400000000          
0     0  50000         Y
       usdhc2                         0        0        0   400000000          
0     0  50000         N
          usdhc2_root_clk             0        0        0   400000000          
0     0  50000         N
       usdhc1                         0        0        0   400000000          
0     0  50000         N
          usdhc1_root_clk             0        0        0   400000000          
0     0  50000         N
    sys1_pll_266m                     1        1        0   266666666          
0     0  50000         Y
       nand_usdhc_bus                 0        0        0   266666666          
0     0  50000         N
          nand_usdhc_rawnand_clk       0        0        0   266666666          
0     0  50000         N
       enet_axi                       1        1        0   266666666          
0     0  50000         Y
          enet1_root_clk              2        2        0   266666666          
0     0  50000         Y
    sys1_pll_200m                     0        0        0   200000000          
0     0  50000         Y
    sys1_pll_160m                     0        0        0   160000000          
0     0  50000         Y
    sys1_pll_133m                     1        1        0   133333333          
0     0  50000         Y
       ahb                            9        4        0   133333333          
0     0  50000         Y
          ipg_root                    8        8        0    66666667          
0     0  50000         Y
             sdma1_clk                6        1        0    66666667          
0     0  50000         Y
             tmu_root_clk             1        1        0    66666667          
0     0  50000         Y
             sai3_ipg_clk             0        0        0    66666667          
0     0  50000         N
             sai2_ipg_clk             0        0        0    66666667          
0     0  50000         N
             ocotp_root_clk           0        0        0    66666667          
0     0  50000         N
             mu_root_clk              0        0        0    66666667          
0     0  50000         N
             gpio5_root_clk           1        1        0    66666667          
0     0  50000         Y
             gpio4_root_clk           1        1        0    66666667          
0     0  50000         Y
             gpio3_root_clk           1        1        0    66666667          
0     0  50000         Y
             gpio2_root_clk           1        1        0    66666667          
0     0  50000         Y
             gpio1_root_clk           1        1        0    66666667          
0     0  50000         Y
    sys1_pll_100m                     2        2        0   100000000          
0     0  50000         Y
       usb_phy_ref                    2        2        0   100000000          
0     0  50000         Y
          usb2_phy_root_clk           1        1        0   100000000          
0     0  50000         Y
          usb1_phy_root_clk           1        1        0   100000000          
0     0  50000         Y
       usb_core_ref                   2        2        0   100000000          
0     0  50000         Y
       qspi                           0        0        0   100000000          
0     0  50000         N
          qspi_root_clk               0        0        0   100000000          
0     0  50000         N
       dram_alt                       0        0        0   100000000          
0     0  50000         N
          dram_alt_root               0        0        0    25000000          
0     0  50000         Y
    sys1_pll_80m                      2        2        0    80000000          
0     0  50000         Y
       pcie1_aux                      1        1        0    10000000          
0     0  50000         Y
       pcie2_aux                      1        1        0    10000000          
0     0  50000         Y
       uart2                          0        0        0    80000000          
0     0  50000         N
          uart2_root_clk              0        0        0    80000000          
0     0  50000         N
       uart1                          0        0        0    80000000          
0     0  50000         N
          uart1_root_clk              0        0        0    80000000          
0     0  50000         N
    sys1_pll_40m                      0        0        0    40000000          
0     0  50000         Y
       wrclk                          0        0        0    40000000          
0     0  50000         N
 dummy                                0        0        0           0          
0     0  50000         Y
 clk-xtal25                           2        2        0    25000000          
0     0  50000         Y
    DIF3                              0        0        0   100000000          
0     0  50000         Y
    DIF2                              1        1        0   100000000          
0     0  50000         Y
    DIF1                              0        0        0   100000000          
0     0  50000         Y
    DIF0                              1        1        0   100000000          
0     0  50000         Y
 clock                                0        0        0       32768          
0     0  50000         Y
 clk_ext4                             0        0        0   133000000          
0     0  50000         Y
 clk_ext3                             0        0        0   133000000          
0     0  50000         Y
 clk_ext2                             0        0        0   133000000          
0     0  50000         Y
 clk_ext1                             0        0        0   133000000          
0     0  50000         Y
 hdmi_phy_27m                         0        0        0    27000000          
0     0  50000         Y
 osc_27m                              0        0        0    27000000          
0     0  50000         Y
 osc_25m                              7       11        0    25000000          
0     0  50000         Y
    gpt_3m                            0        0        0     3125000          
0     0  50000         Y
    csi2_esc                          0        0        0    25000000          
0     0  50000         N
    csi2_phy_ref                      0        0        0    25000000          
0     0  50000         N
    csi2_core                         0        0        0    25000000          
0     0  50000         N
       csi2_root_clk                  0        0        0    25000000          
0     0  50000         N
    csi1_esc                          0        0        0    25000000          
0     0  50000         N
    csi1_phy_ref                      0        0        0    25000000          
0     0  50000         N
    csi1_core                         0        0        0    25000000          
0     0  50000         N
       csi1_root_clk                  0        0        0    25000000          
0     0  50000         N
    dsi_ahb                           0        0        0    25000000          
0     0  50000         N
       dsi_ipg_div                    0        0        0    12500000          
0     0  50000         Y
    dsi_esc                           0        0        0    25000000          
0     0  50000         N
    dsi_dbi                           0        0        0    25000000          
0     0  50000         N
    dsi_phy_ref                       0        0        0    25000000          
0     0  50000         N
    dsi_core                          0        0        0    25000000          
0     0  50000         N
    clko2                             0        0        0    25000000          
0     0  50000         N
    clko1                             0        0        0    25000000          
0     0  50000         N
    wdog                              1        1        0    25000000          
0     0  50000         Y
       wdog3_root_clk                 0        0        0    25000000          
0     0  50000         N
       wdog2_root_clk                 0        0        0    25000000          
0     0  50000         N
       wdog1_root_clk                 1        1        0    25000000          
0     0  50000         Y
    gpt1                              0        0        0    25000000          
0     0  50000         N
       gpt1_root_clk                  0        0        0    25000000          
0     0  50000         N
    pwm4                              0        0        0    25000000          
0     0  50000         N
       pwm4_root_clk                  0        0        0    25000000          
0     0  50000         N
    pwm3                              0        0        0    25000000          
0     0  50000         N
       pwm3_root_clk                  0        0        0    25000000          
0     0  50000         N
    pwm2                              0        0        0    25000000          
0     0  50000         N
       pwm2_root_clk                  0        0        0    25000000          
0     0  50000         N
    pwm1                              0        0        0    25000000          
0     0  50000         N
       pwm1_root_clk                  0        0        0    25000000          
0     0  50000         N
    uart4                             0        0        0    25000000          
0     0  50000         N
       uart4_root_clk                 0        0        0    25000000          
0     0  50000         N
    uart3                             1        1        0    25000000          
0     0  50000         Y
       uart3_root_clk                 4        4        0    25000000          
0     0  50000         Y
    i2c4                              0        0        0    25000000          
0     0  50000         N
       i2c4_root_clk                  0        0        0    25000000          
0     0  50000         N
    i2c3                              0        1        0    25000000          
0     0  50000         N
       i2c3_root_clk                  0        1        0    25000000          
0     0  50000         N
    i2c2                              0        1        0    25000000          
0     0  50000         N
       i2c2_root_clk                  0        1        0    25000000          
0     0  50000         N
    i2c1                              0        1        0    25000000          
0     0  50000         N
       i2c1_root_clk                  0        1        0    25000000          
0     0  50000         N
    spdif2                            0        0        0    25000000          
0     0  50000         N
    spdif1                            0        0        0    25000000          
0     0  50000         N
    sai6                              0        0        0    25000000          
0     0  50000         N
       sai6_root_clk                  0        0        0    25000000          
0     0  50000         N
    sai5                              0        0        0    25000000          
0     0  50000         N
       sai5_root_clk                  0        0        0    25000000          
0     0  50000         N
    sai4                              0        0        0    25000000          
0     0  50000         N
       sai4_root_clk                  0        0        0    25000000          
0     0  50000         N
    sai2                              0        0        0    25000000          
0     0  50000         N
       sai2_root_clk                  0        0        0    25000000          
0     0  50000         N
    sai1                              0        0        0    25000000          
0     0  50000         N
       sai1_root_clk                  0        0        0    25000000          
0     0  50000         N
    lcdif_pixel                       0        0        0    25000000          
0     0  50000         N
    disp_dc8000                       0        0        0    25000000          
0     0  50000         N
       disp_root_clk                  0        0        0    25000000          
0     0  50000         N
    disp_dtrc                         0        0        0    25000000          
0     0  50000         N
    noc_apb                           1        1        0    25000000          
0     0  50000         Y
    video2_pll1_ref_sel               0        0        0    25000000          
0     0  50000         Y
       video2_pll_out                 0        0        0    25000000          
0     0  50000         Y
          video_pll2_out_monitor       0        0        0    25000000          
0     0  50000         Y
    dram_pll1_ref_sel                 1        1        0    25000000          
0     0  50000         Y
       dram_pll_out                   2        2        0   800000000          
0     0  50000         Y
          dram_core_clk               1        1        0   800000000          
0     0  50000         Y
          dram_pll_out_monitor        0        0        0   800000000          
0     0  50000         Y
    sys3_pll1_ref_sel                 1        1        0    25000000          
0     0  50000         Y
       sys3_pll_out                   1        1        0    25000000          
0     0  50000         Y
          sys_pll3_out_monitor        0        0        0    25000000          
0     0  50000         Y
    video_pll1_ref_sel                0        0        0    25000000          
0     0  50000         Y
       video_pll1_bypass              0        0        0    25000000          
0     0  50000         Y
          video_pll1_out_monitor       0        0        0    25000000          
0     0  50000         Y
          video_pll1_out              0        0        0    25000000          
0     0  50000         N
             dc_pixel                 0        0        0     5000000          
0     0  50000         N
       video_pll1_ref_div             0        0        0     5000000          
0     0  50000         Y
          video_pll1                  0        0        0   650000000          
0     0  50000         Y
    audio_pll2_ref_sel                0        0        0    25000000          
0     0  50000         Y
       audio_pll2_ref_div             0        0        0     5000000          
0     0  50000         Y
          audio_pll2                  0        0        0   722534397          
0     0  50000         Y
             audio_pll2_bypass        0        0        0   722534397          
0     0  50000         Y
                audio_pll2_out_monitor       0        0        0   722534397          
0     0  50000         Y
                audio_pll2_out        0        0        0   722534397          
0     0  50000         N
    audio_pll1_ref_sel                0        0        0    25000000          
0     0  50000         Y
       audio_pll1_ref_div             0        0        0     5000000          
0     0  50000         Y
          audio_pll1                  0        0        0   786431998          
0     0  50000         Y
             audio_pll1_bypass        0        0        0   786431998          
0     0  50000         Y
                audio_pll1_out_monitor       0        0        0   786431998          
0     0  50000         Y
                audio_pll1_out        0        0        0   786431998          
0     0  50000         N
                   sai3               0        0        0    49152000          
0     0  50000         N
                      sai3_root_clk       0        0        0    49152000          
0     0  50000         N
                         pll          0        0        0   196608000          
0     0  50000         Y
                            codec_clkin       0        0        0   196608000          
0     0  50000         Y
                               nadc       0        0        0   196608000          
0     0  50000         Y
                                  madc       0        0        0   196608000          
0     0  50000         Y
                               ndac       0        0        0   196608000          
0     0  50000         Y
                                  mdac       0        0        0   196608000          
0     0  50000         Y
                                     bdiv         0        0        0   
196608000          0     0  50000         Y
    vpu_pll_ref_sel                   0        1        0    25000000          
0     0  50000         Y
       vpu_pll_ref_div                0        1        0     5000000          
0     0  50000         Y
          vpu_pll                     0        1        0   600000000          
0     0  50000         Y
             vpu_pll_bypass           0        1        0   600000000          
0     0  50000         Y
                vpu_pll_out_monitor       0        0        0   600000000          
0     0  50000         Y
                vpu_pll_out           0        2        0   600000000          
0     0  50000         N
                   vpu_g2             0        1        0   600000000          
0     0  50000         N
                      vpu_g2_root_clk       0        1        0   600000000          
0     0  50000         N
                   vpu_g1             0        1        0   600000000          
0     0  50000         N
                      vpu_g1_root_clk       0        1        0   600000000          
0     0  50000         N
    gpu_pll_ref_sel                   0        0        0    25000000          
0     0  50000         Y
       gpu_pll_ref_div                0        0        0     5000000          
0     0  50000         Y
          gpu_pll                     0        0        0   800000000          
0     0  50000         Y
             gpu_pll_bypass           0        0        0   800000000          
0     0  50000         Y
                gpu_pll_out_monitor       0        0        0   800000000          
0     0  50000         Y
                   pllout_monitor_sel       0        0        0   800000000          
0     0  50000         Y
                      pllout_monitor_clk2       0        0        0   
800000000          0     0  50000         N
                gpu_pll_out           0        0        0   800000000          
0     0  50000         N
                   gpu_ahb            0        0        0   800000000          
0     0  50000         N
                   gpu_axi            0        0        0   800000000          
0     0  50000         N
                   gpu_shader         0        0        0   800000000          
0     0  50000         N
                   gpu_core           0        0        0   800000000          
0     0  50000         N
                      gpu_root_clk       0        0        0   800000000          
0     0  50000         N
    arm_pll_ref_sel                   1        1        0    25000000          
0     0  50000         Y
       arm_pll_ref_div                1        1        0     5000000          
0     0  50000         Y
          arm_pll                     1        1        0   800000000          
0     0  50000         Y
             arm_pll_bypass           1        1        0   800000000          
0     0  50000         Y
                arm_pll_out_monitor       0        0        0   800000000          
0     0  50000         Y
                arm_pll_out           1        1        0   800000000          
0     0  50000         Y
                   arm_a53_core       1        1        0   800000000          
0     0  50000         Y
                      arm             1        1        0   800000000          
0     0  50000         Y
                   vpu_core           0        0        0   800000000          
0     0  50000         N
 ckil                                 2        2        0       32768          
0     0  50000         Y

Thanks and best regards
Alexander





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