Add a description on VKMS module and the cases in which it should be used.
There's a brief explanation on how to set it and use it in a VM, along with
an example of running an igt-test.
Signed-off-by: Gabriela Bittencourt <[email protected]>
---
Changes in v2:
- Avoid repetition of words in the same sentence;
- Make the explanation on 'setting the kernel' shorter, eliminate the
'make menuconfig' command;
- Add tab on enumeration to have one line per item;
- Clarify from each machine igt-tests commands should be ran on.
Tested the patch using 'make htmldocs' to make sure the output .html is
correct.
Hi DRM-community,
this is my first (of many, I hope) patch in this subsystem. I hope to have
a lot of learning (and fun :)) working with you guys.
I'm starting by documenting the VKMS driver in "Userland interfaces", if I
have been inaccurate in my description or if I misunderstood some concept,
please let me know.
---
Documentation/gpu/drm-uapi.rst | 36 ++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)
diff --git a/Documentation/gpu/drm-uapi.rst b/Documentation/gpu/drm-uapi.rst
index 94f90521f58c..1586cbba05d0 100644
--- a/Documentation/gpu/drm-uapi.rst
+++ b/Documentation/gpu/drm-uapi.rst
@@ -285,6 +285,42 @@ run-tests.sh is a wrapper around piglit that will execute the tests matching
the -t options. A report in HTML format will be available in
./results/html/index.html. Results can be compared with piglit.
+Using VKMS to test DRM API
+--------------------------
+
+VKMS is a software-only model of a KMS driver that is useful for testing
+and for running compositors. VKMS aims to enable a virtual display without
+the need for a hardware display capability. These characteristics made VKMS
+a perfect tool for validating the DRM core behavior and also support the
+compositor developer. VKMS makes it possible to test DRM functions in a
+virtual machine without display, simplifing the validation of some of the
+core changes.
+
+To Validate changes in DRM API with VKMS, start setting the kernel: make
+sure to enable VKMS module; compile the kernel with the VKMS enabled and
+install it in the target machine. VKMS can be run in a Virtual Machine
+(QEMU, virtme or similar). It's recommended the use of KVM with the minimum
+of 1GB of RAM and four cores.
+
+It's possible to run the IGT-tests in a VM in two ways:
+ 1. Use IGT inside a VM
+ 2. Use IGT from the host machine and write the results in a shared directory.
+
+As follow, there is an example of using a VM with a shared directory with
+the host machine to run igt-tests. As example it's used virtme::
+
+ $ virtme-run --rwdir /path/for/shared_dir --kdir=path/for/kernel/directory --mods=auto
+
+Run the igt-tests in the guest machine, as example it's ran the 'kms_flip'
+tests::
+
+ $ /path/for/igt-gpu-tools/scripts/run-tests.sh -p -s -t "kms_flip.*" -v
+
+In this example, instead of build the igt_runner, Piglit is used
+(-p option); it's created html summary of the tests results and it's saved
+in the folder "igt-gpu-tools/results"; it's executed only the igt-tests
+matching the -t option.
+
Display CRC Support
-------------------
--
2.20.1
Hi Gabriela,
Thank you very much for working on improving our documentation.
For me the patch looks good, I just have some nitpick.
First, it is recommended to use an imperative mood in the subject line.
Try something like this:
Add VKMS module description under "Testing and Validation" section
On 11/01, Gabriela Bittencourt wrote:
> Add a description on VKMS module and the cases in which it should be used.
> There's a brief explanation on how to set it and use it in a VM, along with
> an example of running an igt-test.
>
> Signed-off-by: Gabriela Bittencourt <[email protected]>
>
> ---
>
> Changes in v2:
> - Avoid repetition of words in the same sentence;
> - Make the explanation on 'setting the kernel' shorter, eliminate the
> 'make menuconfig' command;
> - Add tab on enumeration to have one line per item;
> - Clarify from each machine igt-tests commands should be ran on.
>
> Tested the patch using 'make htmldocs' to make sure the output .html is
> correct.
>
> Hi DRM-community,
> this is my first (of many, I hope) patch in this subsystem. I hope to have
> a lot of learning (and fun :)) working with you guys.
> I'm starting by documenting the VKMS driver in "Userland interfaces", if I
> have been inaccurate in my description or if I misunderstood some concept,
> please let me know.
> ---
> Documentation/gpu/drm-uapi.rst | 36 ++++++++++++++++++++++++++++++++++
> 1 file changed, 36 insertions(+)
>
> diff --git a/Documentation/gpu/drm-uapi.rst b/Documentation/gpu/drm-uapi.rst
> index 94f90521f58c..1586cbba05d0 100644
> --- a/Documentation/gpu/drm-uapi.rst
> +++ b/Documentation/gpu/drm-uapi.rst
> @@ -285,6 +285,42 @@ run-tests.sh is a wrapper around piglit that will execute the tests matching
> the -t options. A report in HTML format will be available in
> ./results/html/index.html. Results can be compared with piglit.
>
> +Using VKMS to test DRM API
> +--------------------------
> +
> +VKMS is a software-only model of a KMS driver that is useful for testing
> +and for running compositors. VKMS aims to enable a virtual display without
> +the need for a hardware display capability. These characteristics made VKMS
> +a perfect tool for validating the DRM core behavior and also support the
> +compositor developer. VKMS makes it possible to test DRM functions in a
> +virtual machine without display, simplifing the validation of some of the
/simplifing/simplifying/
> +core changes.
> +
> +To Validate changes in DRM API with VKMS, start setting the kernel: make
> +sure to enable VKMS module; compile the kernel with the VKMS enabled and
> +install it in the target machine. VKMS can be run in a Virtual Machine
> +(QEMU, virtme or similar). It's recommended the use of KVM with the minimum
> +of 1GB of RAM and four cores.
> +
> +It's possible to run the IGT-tests in a VM in two ways:
Break line or add "::" at the end of the phrase, otherwise the above
line will be bold.
> + 1. Use IGT inside a VM
> + 2. Use IGT from the host machine and write the results in a shared directory.
> +
> +As follow, there is an example of using a VM with a shared directory with
> +the host machine to run igt-tests. As example it's used virtme::
> +
/As example/As an example,/
Best Regards
> + $ virtme-run --rwdir /path/for/shared_dir --kdir=path/for/kernel/directory --mods=auto
> +
> +Run the igt-tests in the guest machine, as example it's ran the 'kms_flip'
> +tests::
> +
> + $ /path/for/igt-gpu-tools/scripts/run-tests.sh -p -s -t "kms_flip.*" -v
> +
> +In this example, instead of build the igt_runner, Piglit is used
> +(-p option); it's created html summary of the tests results and it's saved
> +in the folder "igt-gpu-tools/results"; it's executed only the igt-tests
> +matching the -t option.
> +
> Display CRC Support
> -------------------
>
> --
> 2.20.1
>
--
Rodrigo Siqueira
Software Engineer, Advanced Micro Devices (AMD)
https://siqueira.tech