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From:   Steev Klimaszewski <steev@kali.org>
To:     steev@kali.org
Cc:     Rob Clark <robdclark@gmail.com>,
        Abhinav Kumar <quic_abhinavk@quicinc.com>,
        Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
        Sean Paul <sean@poorly.run>, David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>, linux-arm-msm@vger.kernel.org,
        dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH] drm/msm: Set preferred depth.
Date:   Fri,  6 Jan 2023 01:16:09 -0600
Message-Id: <20230106071609.3948-1-steev@kali.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

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@kali.org>
---
 drivers/gpu/drm/msm/msm_drv.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 8b0b0ac74a6f..65c4c93c311e 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -479,6 +479,7 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv)
 
 	drm_helper_move_panel_connectors_to_head(ddev);
 
+	ddev->mode_config.preferred_depth = 24;
 	ddev->mode_config.funcs = &mode_config_funcs;
 	ddev->mode_config.helper_private = &mode_config_helper_funcs;
 
-- 
2.39.0