[PATCH 2/6] TDA19988 : Port to RTEMS

Christian Mauderer list at c-mauderer.de
Sun Jun 30 16:29:38 UTC 2019


On 30/06/2019 18:24, Vijay Kumar Banerjee wrote:
> 
> 
> On Sun, Jun 30, 2019 at 9:18 PM Christian Mauderer <list at c-mauderer.de
> <mailto:list at c-mauderer.de>> wrote:
> 
>     On 30/06/2019 17:29, Vijay Kumar Banerjee wrote:
>     > ---
>     >  Makefile.todo                                 | 27 ++++++
>     >  buildset/default.ini                          |  1 +
>     >  libbsd.py                                     | 46 ++++++++++
>     >  rtemsbsd/include/bsp/nexus-devices.h          |  1 +
>     >  .../machine/rtems-bsd-kernel-namespace.h      | 65 +++++++++++++
>     >  rtemsbsd/include/rtems/bsd/local/clknode_if.h | 92
>     +++++++++++++++++++
>     >  rtemsbsd/include/rtems/bsd/local/hdmi_if.h    | 71 ++++++++++++++
>     >  .../include/rtems/bsd/local/opt_videomode.h   |  0
>     >  rtemsbsd/local/clknode_if.c                   | 40 ++++++++
>     >  rtemsbsd/local/hdmi_if.c                      | 35 +++++++
>     >  10 files changed, 378 insertions(+)
>     >  create mode 100644 rtemsbsd/include/rtems/bsd/local/clknode_if.h
>     >  create mode 100644 rtemsbsd/include/rtems/bsd/local/hdmi_if.h
>     >  create mode 100644 rtemsbsd/include/rtems/bsd/local/opt_videomode.h
>     >  create mode 100644 rtemsbsd/local/clknode_if.c
>     >  create mode 100644 rtemsbsd/local/hdmi_if.c
>     >
>     > diff --git a/Makefile.todo b/Makefile.todo
>     > index 42bedc15..358d6956 100644
>     > --- a/Makefile.todo
>     > +++ b/Makefile.todo
>     > @@ -47,6 +47,10 @@ GENERATED += $(LOCAL_INC)/gpiobus_if.h
>     >  GENERATED += $(LOCAL_SRC)/gpiobus_if.c
>     >  GENERATED += $(LOCAL_INC)/iicbus_if.h
>     >  GENERATED += $(LOCAL_SRC)/iicbus_if.c
>     > +GENERATED += $(LOCAL_INC)/clknode_if.h
>     > +GENERATED += $(LOCAL_SRC)/clknode_if.c
>     > +GENERATED += $(LOCAL_INC)/hdmi_if.h
>     > +GENERATED += $(LOCAL_SRC)/hdmi_if.c
>     >  GENERATED += rtemsbsd/include/machine/rtems-bsd-regdomain.h
>     >  GENERATED += rtemsbsd/rtems/rtems-bsd-regdomain.c
>>     > @@ -239,6 +243,29 @@ $(LOCAL_SRC)/sdhci_if.c:
>     $(FREEBSD_SRC)/sys/dev/sdhci/sdhci_if.m
>     >           -e 's|#include "sdhci_if.h"|#include
>     <rtems/bsd/local/sdhci_if.h>|'
>     >       mv sdhci_if.c $@
>>     > +
>     > +$(LOCAL_INC)/clknode_if.h:
>     $(FREEBSD_SRC)/sys/dev/extres/clk/clknode_if.m
>     > +     awk -f $(TOOLS)/makeobjops.awk $< -h
>     > +     mv clknode_if.h $@
>     > +
>     > +$(LOCAL_SRC)/clknode_if.c:
>     $(FREEBSD_SRC)/sys/dev/extres/clk/clknode_if.m
>     > +     awk -f $(TOOLS)/makeobjops.awk $< -c
>     > +     sed -i clknode_if.c \
>     > +         -e '1 i\#include <machine/rtems-bsd-kernel-space.h>\n' \
>     > +         -e 's|#include "clknode_if.h"|#include
>     <rtems/bsd/local/clknode_if.h>|'
>     > +     mv clknode_if.c $@
>     > +
>     > +$(LOCAL_INC)/hdmi_if.h: $(FREEBSD_SRC)/sys/dev/hdmi/hdmi_if.m
>     > +     awk -f $(TOOLS)/makeobjops.awk $< -h
>     > +     mv hdmi_if.h $@
>     > +
>     > +$(LOCAL_SRC)/hdmi_if.c: $(FREEBSD_SRC)/sys/dev/hdmi/hdmi_if.m
>     > +     awk -f $(TOOLS)/makeobjops.awk $< -c
>     > +     sed -i hdmi_if.c \
>     > +         -e '1 i\#include <machine/rtems-bsd-kernel-space.h>\n' \
>     > +         -e 's|#include "hdmi_if.h"|#include
>     <rtems/bsd/local/hdmi_if.h>|'
>     > +     mv hdmi_if.c $@
>     > +
>     >  $(LOCAL_SRC)/gpio_if.c: $(FREEBSD_SRC)/sys/dev/gpio/gpio_if.m
>     >       awk -f $(TOOLS)/makeobjops.awk $< -c
>     >       mv gpio_if.c $@
>     > diff --git a/buildset/default.ini b/buildset/default.ini
>     > index 4acb2368..1d052a48 100644
>     > --- a/buildset/default.ini
>     > +++ b/buildset/default.ini
>     > @@ -37,6 +37,7 @@ dev_usb_storage = on
>     >  dev_usb_wlan = off
>     >  dev_wlan_rtwn = off
>     >  iic = on
>     > +display = on
>     >  dhcpcd = on
>     >  dpaa = on
>     >  evdev = on
>     > diff --git a/libbsd.py b/libbsd.py
>     > index 12d4c2ed..b21ddccf 100644
>     > --- a/libbsd.py
>     > +++ b/libbsd.py
>     > @@ -777,6 +777,51 @@ class iic(builder.Module):
>     >              mm.generator['source']()
>     >          )
>>     > +
>     > +#
>     > +# DISPLAY
>     > +#
>     > +class display(builder.Module):
>     > +
>     > +    def __init__(self, manager):
>     > +        super(display, self).__init__(manager, type(self).__name__)
>     > +
>     > +    def generate(self):
>     > +        mm = self.manager
>     > +        self.addKernelSpaceHeaderFiles(
>     > +            [
>     > +                'sys/dev/extres/clk/clk.h',
>     > +                'sys/dev/hdmi/dwc_hdmi.h',
>     > +                'sys/dev/hdmi/dwc_hdmireg.h',
>     > +                'sys/dev/videomode/videomode.h',
>     > +                'sys/dev/videomode/edidvar.h',
>     > +                'sys/dev/videomode/edidreg.h',
>     > +                'sys/dev/videomode/ediddevs.h',
>     > +                'sys/dev/videomode/ediddevs_data.h',
>     > +                'sys/dev/videomode/vesagtf.h',
>     > +            ]
>     > +        )
>     > +        self.addKernelSpaceSourceFiles(
>     > +            [
>     > +                'sys/arm/ti/am335x/tda19988.c',
>     > +                'sys/dev/hdmi/dwc_hdmi.c',
>     > +                'sys/dev/hdmi/dwc_hdmi_fdt.c',
>     > +                'sys/dev/extres/clk/clk.c',
> 
>     The clk.c looks like some framework for handling clocks. I would expect
>     that you either need some beagle bone specific clock driver too or don't
>     need the support at all. Where is it used?
> 
>     How does it interact with the clock initializations done in the BSP? Can
>     a resource conflict happen there?
> 
> I have included the clk.c file as some macros from clk.h is used
> in dwc_hdmi_fdt.c
> I have just tried removing it and it doesn't cause any undefined symbol
> reference,
> I think I'm lucky here if it can simply be removed in v2 of the patch. 
> 
>     [...]
> 

OK. Great. But don't hurry with v2. I don't think that the patches will
be merged before before anything is drawn to the screen. Although your
current version is a good progress in your project, a framebuffer
without read, write or mmap isn't really useful yet. So I would prefer
merging them together with later patch sets.

Best regards

Christian




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