On 05/03, Maxime Ripard wrote: > Hi, > > Here's a series that fixes a significant issue we missed when adding support > for the BCM2711 / RaspberryPi4 in the vc4 driver. > > Indeed, before the introduction of the BCM2711 support, the GPU was fairly > intertwined with the display hardware, and was thus supported by the vc4 > driver. Among other things, the driver needed to accomodate for a bunch of > hardware limitations (such as a lack of IOMMU) by implementing a custom memory > management backend, tied with the v3d hardware. > > On the BCM2711, that GPU got moved into a completely separate hardware block > and thus we gained a new driver for it, v3d. > > However, when we introduced the display support for the BCM2711 in vc4, we > didn't properly split out the v3d-related functions and ended up reusing a > significant portion of the code supposed to be backed by the v3d. > > This created a bunch of easy to miss issues that would only pop up with IGT > tests, or when heavily testing some features (like asynchronous page-flipping). > > This series properly does the split now by creating separate code path where > relevant, adds a loud complain when we use a v3d entry-point on the BCM2711, > and fixes an issue where we would just ignore any fence on an asynchronous > page-flip, resulting in frames appearing out-of-order for some workloads. > > Let me know what you think, Hi Maxime, Overall lgtm. I didn't catch anything tricky and I did some tests to verify the current behaviour is preserved. Unfortunately, I couldn't test the async mechanisms much, let me know if you have any suggestions for testing. I only concern about accommodate vc5 naming since vc4->v3d vs v3d is already a little confusing. After addressing dma_resv_get_singleton usage, this series is: Reviewed-by: Melissa Wen <mwen@xxxxxxxxxx> > Maxime > > Maxime Ripard (14): > drm/vc4: plane: Prevent async update if we don't have a dlist > drm/vc4: Consolidate Hardware Revision Check > drm/vc4: bo: Rename vc4_dumb_create > drm/vc4: bo: Split out Dumb buffers fixup > drm/vc4: drv: Register a different driver on BCM2711 > drm/vc4: kms: Register a different drm_mode_config_funcs on BCM2711 > drm/vc4: plane: Register a different drm_plane_helper_funcs on BCM2711 > drm/vc4: drv: Skip BO Backend Initialization on BCM2711 > drm/vc4: crtc: Use an union to store the page flip callback > drm/vc4: crtc: Move the BO handling out of common page-flip callback > drm/vc4: crtc: Move the BO Handling out of Common Page-Flip Handler > drm/vc4: crtc: Don't call into BO Handling on Async Page-Flips on > BCM2711 > drm/vc4: crtc: Fix out of order frames during asynchronous page flips > drm/vc4: Warn if some v3d code is run on BCM2711 > > drivers/gpu/drm/vc4/vc4_bo.c | 62 ++++++- > drivers/gpu/drm/vc4/vc4_crtc.c | 193 +++++++++++++++------ > drivers/gpu/drm/vc4/vc4_drv.c | 97 +++++++++-- > drivers/gpu/drm/vc4/vc4_drv.h | 19 +- > drivers/gpu/drm/vc4/vc4_gem.c | 40 +++++ > drivers/gpu/drm/vc4/vc4_hvs.c | 18 +- > drivers/gpu/drm/vc4/vc4_irq.c | 16 ++ > drivers/gpu/drm/vc4/vc4_kms.c | 24 ++- > drivers/gpu/drm/vc4/vc4_perfmon.c | 41 +++++ > drivers/gpu/drm/vc4/vc4_plane.c | 29 +++- > drivers/gpu/drm/vc4/vc4_render_cl.c | 4 + > drivers/gpu/drm/vc4/vc4_v3d.c | 15 ++ > drivers/gpu/drm/vc4/vc4_validate.c | 16 ++ > drivers/gpu/drm/vc4/vc4_validate_shaders.c | 4 + > 14 files changed, 470 insertions(+), 108 deletions(-) > > -- > 2.35.1 >
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