Linux/AM5718: OMAPDRM module not getting loaded and installed

Hi

We are using custom board.

We have already rebuild SGX modules and installed pvrsrvkm module succesfully but suggest us what we have to do in order to build the module omapdrm_pvr and also guide us the procedure that we have to follow to build the module omapdrm_pvr specifically as it our current requirement.

Guide us where to observe whether graphics in the device tree is enabled or not.

BR

Prasad

Hi,

As we are very much new regarding the modules loading and installation process and we tried to  rebuild SGX modules and installed pvrsrvkm module successfully, our current requirement module is omapdrm_pvr which is presently hot topic for us so make us know how to install that module and also the procedure related to it as soon as possible. Also we are attaching defconfig file kindly go through it once and suggest us if any modifications that we should perform.

tisdk_am57xx-evm_defconfig.zip

And when we tried to start pvrsrvkm we got the following error

root@am57xx-evm:~# pvrsrvctl --start
Failed to load /lib/modules/4.14.67-g9acd3b72e9/extra/pvrsrvkm.ko: No such file or directory
root@am57xx-evm:~# modinfo pvrsrvkm
filename:       /lib/modules/4.14.79-gbde58ab01e/extra/pvrsrvkm.ko
license:        Dual MIT/GPL
author:         Imagination Technologies Ltd. <gpl-support@imgtec.com>
license:        Dual MIT/GPL
author:         Imagination Technologies Ltd. <gpl-support@imgtec.com>
srcversion:     533BB7E5866E52F63B9ACCB
alias:          of:N*T*Cti,dra7-sgx544C*
alias:          of:N*T*Cti,dra7-sgx544
depends:        
name:           pvrsrvkm
vermagic:       4.14.79-gbde58ab01e SMP preempt mod_unload modversions ARMv7 p2v8
parm:           gPVRDebugLevel:Sets the level of debug output (default 0x7) (uint)

root@am57xx-evm:~# dmesg | grep -nre "sgx"
root@am57xx-evm:~# dmesg | grep -nre "drm"
root@am57xx-evm:~# lsmod

Module                  Size  Used by
pvrsrvkm              417792  0
snd_soc_simple_card    16384  0
snd_soc_simple_card_utils    16384  1 snd_soc_simple_card
omap_aes_driver        24576  1
omap_sham              28672  1
omap_wdt               16384  1
ahci_platform          16384  1
libahci_platform       16384  1 ahci_platform
libahci                36864  2 ahci_platform,libahci_platform
libata                204800  3 ahci_platform,libahci_platform,libahci
phy_omap_usb2          16384  0
scsi_mod              135168  1 libata
ti_vpe                 24576  1
ti_sc                  36864  1 ti_vpe
ti_csc                 16384  1 ti_vpe
ti_vpdma               20480  1 ti_vpe
dwc3_omap              16384  1
rtc_omap               20480  1
c_can_platform         16384  0
c_can                  20480  1 c_can_platform
can_dev                24576  1 c_can
rtc_ds1307             24576  0
snd_soc_tlv320aic3x    57344  1
omap_des               20480  0
des_generic            28672  1 omap_des
crypto_engine          16384  2 omap_des,omap_aes_driver
omap_crypto            16384  2 omap_des,omap_aes_driver
extcon_usb_gpio        16384  0
sch_fq_codel           20480  2
uio_module_drv         16384  0
uio                    20480  1 uio_module_drv
ftdi_sio               40960  0
usbserial              32768  1 ftdi_sio
usbcore               204800  2 ftdi_sio,usbserial
usb_common             16384  1 usbcore
gdbserverproxy         16384  0
cryptodev              45056  0
cmemk                  45056  2
root@am57xx-evm:~#

BR

Prasad

Hello,

I am sorry I was OoO.
What is the output of this:
dmesg | grep omapdrm

Best Regards,
Margarita

Hi
root@am57xx-evm:~# dmesg | grep omapdrm
[ 2.289504] [drm] Initialized omapdrm 1.0.0 20110917 for omapdrm.0 on minor 0

Hello,

Potturu Venkata Prasad said:

root@am57xx-evm:~# dmesg | grep omapdrm
[ 2.289504] [drm] Initialized omapdrm 1.0.0 20110917 for omapdrm.0 on minor 0

It seems omapdrm is loaded.

Potturu Venkata Prasad said:

root@am57xx-evm:~# pvrsrvctl --start

Failed to load /lib/modules/4.14.67-g9acd3b72e9/extra/pvrsrvkm.ko: No such file or directory

root@am57xx-evm:~# modinfo pvrsrvkm

filename:       /lib/modules/4.14.79-gbde58ab01e/extra/pvrsrvkm.ko

BR
Margarita

Hi,
Although omapdrm is loaded while trying to list the modules we are unable to find and load omapdrm_pvr module.
So, what should we have to do inorder to load the module omapdrm_pvr.

Thanks and regards,
Prasad.

Hello,

Omapdrm and omapdrm_pvr are different drivers.
Omapdrm is TI's driver for drm display and omapdrm_pvr is graphics driver but this is available in 3.14 kernels.
For more information refer this:
software-dl.ti.com/.../linuxFoundational_Components_Kernel_Drivers.htm
On 4.4 kernels onwards, there is pvrsrvkm.ko module.

BR
Margarita

Hi,

&dss {
        status = "okay";
        vdda_video-supply = <&ldo5_reg>;
        ports {
                #address-cells = <1>;
                #size-cells = <0>;

                port {
                        reg = <0>;

                        dpi_out: endpoint {
                                //   remote-endpoint = <&lcd_in>;
                                     data-lines = <24>;
                        };

                };
        };
};

Once have a look at above piece of code if we comment the highlighted line we are able to load the omapdrm module and there is a display back light problem, whereas the other scenario if we un comment the highlighted line the case is reverse. So once have a look at the attached device tree files and suggest us where we are doing fault and how to proceed further.

8176.Files.zip

BR

Prasad

Hi,
Issue is not only with the backlight, we are having an issue with the omapdrm module too. If we tried to load omapdrm module we are not getting backlight and if we get the backlight we are not able to load the omapdrm module. So consider both the issues and guide us what's wrong.

Thanks and regards,
Prasad.