linux-kernel - Re: [PATCH] drm/msm: Set preferred depth.

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Message-ID: <f52cca60-ab6a-460a-65f9-367c083b51fa@linaro.org>
Date:   Fri, 6 Jan 2023 09:18:21 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Steev Klimaszewski <steev@...i.org>
Cc:     Rob Clark <robdclark@...il.com>,
        Abhinav Kumar <quic_abhinavk@...cinc.com>,
        Sean Paul <sean@...rly.run>, David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, linux-arm-msm@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, freedreno@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/msm: Set preferred depth.

On 06/01/2023 09:16, Steev Klimaszewski wrote:
> As of commit 37c90d589dc0 ("drm/fb-helper: Fix single-probe color-format
> selection"), if no supported color formats are found, it tries to use the
> driver provided default, which msm didn't have set and leads to the
> following output:
> 
> msm_dpu ae01000.display-controller: [drm] bpp/depth value of 32/0 not supported
> msm_dpu ae01000.display-controller: [drm] bpp/depth value of 32/0 not supported
> msm_dpu ae01000.display-controller: [drm] bpp/depth value of 32/0 not supported
> msm_dpu ae01000.display-controller: [drm] No compatible format found
> ------------[ cut here ]------------
> WARNING: CPU: 0 PID: 73 at drivers/gpu/drm/drm_atomic.c:1604 __drm_atomic_helper_set_config+0x240/0x33c
> Modules linked in: ext4 mbcache jbd2 msm mdt_loader ocmem gpu_sched llcc_qcom gpio_keys qrtr
> CPU: 0 PID: 73 Comm: kworker/u16:2 Not tainted 6.2.0-rc2-next-20230106 #53
> Hardware name: LENOVO 21BX0015US/21BX0015US, BIOS N3HET74W (1.46 ) 10/12/2022
> Workqueue: events_unbound deferred_probe_work_func
> pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
> pc : __drm_atomic_helper_set_config+0x240/0x33c
> lr : __drm_atomic_helper_set_config+0x68/0x33c
> sp : ffff800008a7b790
> x29: ffff800008a7b790 x28: ffff73ee3e130a00 x27: 0000000000000000
> x26: ffff73ee3d256e00 x25: 0000000000000038 x24: ffff73e6c0d65e00
> x23: ffff73e6c17a7800 x22: ffff73e6c0d64e00 x21: ffff73e79c025e00
> x20: 00000000c0d64e00 x19: ffff73ee3e130a00 x18: ffffffffffffffff
> x17: 662074616d726f66 x16: 20656c6269746170 x15: 0000000000000000
> x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
> x11: 0000000000000000 x10: 0000000000000000 x9 : ffffa829144ff8bc
> x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
> x5 : ffff73e6c0d65f50 x4 : ffff73ee3d254950 x3 : ffff73e6c0d65ec0
> x2 : ffff73ee3c953a00 x1 : ffff73e79c025580 x0 : 0000000000000000
> Call trace:
> __drm_atomic_helper_set_config+0x240/0x33c
> drm_client_modeset_commit_atomic+0x160/0x280
> drm_client_modeset_commit_locked+0x64/0x194
> drm_client_modeset_commit+0x38/0x60
> __drm_fb_helper_initial_config_and_unlock+0x528/0x63c
> drm_fb_helper_initial_config+0x54/0x64
> msm_fbdev_init+0x94/0xfc [msm]
> msm_drm_bind+0x548/0x614 [msm]
> try_to_bring_up_aggregate_device+0x1e4/0x2d0
> __component_add+0xc4/0x1c0
> component_add+0x1c/0x2c
> dp_display_probe+0x2a4/0x460 [msm]
> platform_probe+0x70/0xcc
> really_probe+0xc8/0x3e0
> __driver_probe_device+0x84/0x190
> driver_probe_device+0x44/0x120
> __device_attach_driver+0xc4/0x160
> bus_for_each_drv+0x84/0xe0
> __device_attach+0xa4/0x1cc
> device_initial_probe+0x1c/0x2c
> bus_probe_device+0xa4/0xb0
> deferred_probe_work_func+0xc0/0x114
> process_one_work+0x1ec/0x470
> worker_thread+0x74/0x410
> kthread+0xfc/0x110
> ret_from_fork+0x10/0x20
> ---[ end trace 0000000000000000 ]---
> 
> Signed-off-by: Steev Klimaszewski <steev@...i.org>
> ---
>   drivers/gpu/drm/msm/msm_drv.c | 1 +
>   1 file changed, 1 insertion(+)

Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>

-- 
With best wishes
Dmitry