Re: [PATCH i-g-t 00/12] Prepare for returning NULL from igt_crtc_for_pipe()

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Mon, Mar 16, 2026 at 01:19:02PM +0200, Jani Nikula wrote:
> We want to return NULL for invalid pipes from igt_crtc_for_pipe(), so
> that we don't need to have igt_crtc_t objects with crtc->valid == false
> around.
> 
> The primary way to prepare for this is to avoid using
> igt_crtc_for_pipe() altogether. We've done a *lot* of that already, and
> continue to do so here.
> 
> For the remaining ones, start off by ensuring crtc->valid == true, one
> way or other. This ensures the test logic is sane and actually operates
> on valid CRTCs. Once this prep is done, we can actually return NULL from
> igt_crtc_for_pipe(), and check for crtc != NULL instead of crtc->valid
> == true.

I was hoping to make igt_crtc_for_pipe() just skip if the CRTC
doesn't exist. But maybe there are still too many places that
assume they can ask for any pipe and not skip?

> 
> BR,
> Jani.
> 
> 
> Jani Nikula (12):
>   tests/amdgpu/amd_mode_switch: Prepare for returning NULL from
>     igt_crtc_for_pipe()
>   tests/amdgpu/amd_multidisplay_modeset: Prepare for returning NULL from
>     igt_crtc_for_pipe()
>   tests/intel/kms_cdclk: use igt_next_crtc()
>   tests/intel/kms_joiner: Prepare for returning NULL from
>     igt_crtc_for_pipe()
>   tests/intel/kms_joiner_helper: Prepare for returning NULL from
>     igt_crtc_for_pipe()
>   tests/intel/kms_pipe_b_c_ivb: Prepare for returning NULL from
>     igt_crtc_for_pipe()
>   tests/intel/kms_pipe_stress: Prepare for returning NULL from
>     igt_crtc_for_pipe()
>   tests/kms_bw: fix misleading indent
>   tests/kms_bw: clarify what's going on with proper variable naming
>   tests/kms_bw: avoid igt_crtc_for_pipe() and crtc->pipe usage
>   tests/kms_explicit_fence: store igt_crtc_t* instead of pipe in data
>   lib/kms: convert igt_crtc_for_pipe() into a proper function
> 
>  lib/igt_kms.c                           |  8 +++
>  lib/igt_kms.h                           |  8 +--
>  tests/amdgpu/amd_mode_switch.c          |  2 +
>  tests/amdgpu/amd_multidisplay_modeset.c |  2 +
>  tests/intel/kms_cdclk.c                 | 10 ++--
>  tests/intel/kms_joiner.c                | 66 ++++++++++++++++++-------
>  tests/intel/kms_joiner_helper.c         | 16 +++---
>  tests/intel/kms_pipe_b_c_ivb.c          | 28 +++++++----
>  tests/intel/kms_pipe_stress.c           |  4 ++
>  tests/kms_bw.c                          | 48 +++++++++---------
>  tests/kms_explicit_fence.c              | 14 +++---
>  11 files changed, 131 insertions(+), 75 deletions(-)
> 
> -- 
> 2.47.3

-- 
Ville Syrjälä
Intel