linux-kernel - Re: [PATCH v3 00/12] drm/msm/dpu: rework format handling code

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Message-Id: <DFIBYFY6L63Q.1A8WFXEQ7DYUT@fairphone.com>
Date: Wed, 07 Jan 2026 12:45:37 +0100
From: "Luca Weiss" <luca.weiss@...rphone.com>
To: "Dmitry Baryshkov" <dmitry.baryshkov@....qualcomm.com>, "Rob Clark"
 <robin.clark@....qualcomm.com>, "Dmitry Baryshkov" <lumag@...nel.org>,
 "Abhinav Kumar" <abhinav.kumar@...ux.dev>, "Sean Paul" <sean@...rly.run>,
 "Marijn Suijten" <marijn.suijten@...ainline.org>, "David Airlie"
 <airlied@...il.com>, "Simona Vetter" <simona@...ll.ch>, "Jordan Crouse"
 <jordan@...micpenguin.net>, "Jessica Zhang" <jesszhan0024@...il.com>
Cc: <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
 <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>, "Jessica
 Zhang" <jessica.zhang@....qualcomm.com>
Subject: Re: [PATCH v3 00/12] drm/msm/dpu: rework format handling code

On Fri Nov 14, 2025 at 4:43 AM CET, Dmitry Baryshkov wrote:
> - Rework mdp_format.c in order to make format table manageable
> - Rework layout population for UBWC formats in DPU driver
>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
> ---
> Changes in v3:
> - Readded disappeared YUV flag to PSEUDO_YUV_FMT_TILED
> - Link to v2: https://lore.kernel.org/r/20250905-dpu-formats-v2-0-7a674028c048@oss.qualcomm.com
>
> Changes in v2:
> - Dropped DX flag from the tiled NV12 format structure (Jessica)
> - Changed round_up(foo, 192) to the roundup() as the former one is
>   supposed to be used with power of 2 argument (Jessica)
> - Fixed undefined varuables warning in
>   _dpu_format_populate_plane_sizes_ubwc() by dropping the always-true
>   condition (LKP)
> - Link to v1: https://lore.kernel.org/r/20250705-dpu-formats-v1-0-40f0bb31b8c8@oss.qualcomm.com
>
> ---
> Dmitry Baryshkov (12):
>       drm/msm/disp: set num_planes to 1 for interleaved YUV formats
>       drm/msm/disp: set num_planes and fetch_mode in INTERLEAVED_RGB_FMT
>       drm/msm/disp: set num_planes, fetch_mode and tile_height in INTERLEAVED_RGB_FMT_TILED
>       drm/msm/disp: simplify RGB{,A,X} formats definitions
>       drm/msm/disp: simplify tiled RGB{,A,X} formats definitions
>       drm/msm/disp: pull in common YUV format parameters
>       drm/msm/disp: pull in common tiled YUV format parameters
>       drm/msm/disp: drop PSEUDO_YUV_FMT_LOOSE_TILED
>       drm/msm/dpu: simplify _dpu_format_populate_plane_sizes_*
>       drm/msm/dpu: drop redundant num_planes assignment in _dpu_format_populate_plane_sizes*()
>       drm/msm/dpu: rewrite _dpu_format_populate_plane_sizes_ubwc()
>       drm/msm/dpu: use standard functions in _dpu_format_populate_plane_sizes_ubwc()

Seems to work as expected according to our messages in IRC, no issues
seen booting up Phosh or SuperTuxKart.

Tested-by: Luca Weiss <luca.weiss@...rphone.com> # qcm6490-fairphone-fp5

Regards
Luca

>
>  drivers/gpu/drm/msm/disp/dpu1/dpu_formats.c    |  174 ++--
>  drivers/gpu/drm/msm/disp/dpu1/msm_media_info.h | 1155 ------------------------
>  drivers/gpu/drm/msm/disp/mdp_format.c          |  614 +++++++------
>  3 files changed, 391 insertions(+), 1552 deletions(-)
> ---
> base-commit: b179ce312bafcb8c68dc718e015aee79b7939ff0
> change-id: 20250705-dpu-formats-0d5ae4d1a1b9
>
> Best regards,