LVGL 8.3+wayland can't find wayland shell

[arilink]

weston version:10.0.0
LVGL version:8.3.0
LVGL driver 8.3.0

I tried to run LVGL on the rk3568 platform. The macro definition enables wayland and XDG shell, but the segment err is prompted when lvgl demo is run, so I further debug the problem that lvgl cannot find wayland shell. But my qt program can work normally, what could be the problem?

[arilink]

[arilink]

After searching the problem step by step, I found that weston10 did not have wl_shell interface, instead of xdg_shell, so I opened the macro definition of XDG_SHELL, searched the header file and lib again, and compiled and ran it. At this time, the following error occurred, I do not know how to solve it

[arilink]

[kisvegabor]

@daniel-rossier it might be useful for the LVGL v9 Wayland driver.

[daniel-rossier]

Thanks Gábor! Indeed, it may help; I forward the info to @etag4048 who is nearly ready to submit a PR with the support of LVLG 9 in wayland.

[arilink]

So the lvgl v9 doesn't have this problem?

[etag4048]

@arilink Did you update the lv_drv_conf.h and set LV_WAYLAND_XDG_SHELL to 1 ? Support for wl-shell has been deprecated for 3 years, it has been dropped in Weston 10.x

[arilink]

@etag4048 Yes, I have set LV_WAYLAND_XDG_SHELL to 1 but it still won't display properly, this picture is USE LV_WAYLAND_XDG_SHELL

[etag4048]

@arilink Looking at the screenshots more carefully, there is something abnormal in the wayland debug logs. It seems like create_window is called two times since xdg_toplevel@12.set_title is present two times, are you calling lv_wayland_create_window multiple times ?

At it's core this problem is caused by a race condition that is apparent on some weston configurations. The buffer is attached to the surface before weston sends the configure event. Upon the configure event xdg_surface_handle_configure is called where the surface_configured flag is set. Instead, in your case the surface_configured is set in create_graphic_obj and when LVGL calls the flush cb _lv_wayland_flush on line 1992 the buffer gets attached too early..

Try commenting out the line 1411 obj->surface_configured = true;
Add wl_display_dispatch(application.display); in create_window right after wl_surface_commit(window->body->surface); on line 1800.

Also check why xdg_toplevel@12.set_title is present two times.

Please avoid screenshots, you can capture the wayland logs like so ./your_app 2>/tmp/wayland_debug and then paste the logs it makes life easy :)

[arilink]

@etag4048 I only called lv_wayland_create_window once in main.c file. You mean that surface was not fully configured when flush cb was used, so this problem occurred, right? I uploaded wayland.c, could you please help me adjust the code, because the code line number you described seems to be inconsistent with mine
wayland.zip

[etag4048]

@arilink It looks like lvgl drivers on the rk3568 are outdated, please apply the patch c8d483f this issue has been fixed in commit c8d483f by previous contributors. Another solution could be to update to release/v8.3 the above answer is applicable on 8cdabe8 you have to checkout the correct branch to be on version 8.3. Also weston 10 is not the most up date version.

[arilink]

OK. I will try release/v8.3

[arilink]

@etag4048
After replacing the Driver of release/v8.3, lvgl can display normally, but there will be other problems, as follows
1.RK3568 hardware supports multi-screen display, so does weston. I plan to use HDMI as the main display, run Qt app, and DSI as the secondary display to display lvgl app
2. I start the Qt app first, and once I run lvgl->demo qt app the app screen disappears
3. In the/etc/XDG/weston/weston. Ini. I configured two outputs and corresponding app ids
Where could this be a problem?

[arilink]

lvgl app start log is blow:
root@ATK-DLRK356X:~# /opt/lvgl/lvgl-wayland2
[ 854435.514] -> wl_display@1.get_registry(new id wl_registry@2)
[ 854435.711] wl_display@1.get_registry(new id wl_registry@2)
[ 854435.773] -> wl_registry@2.global(1, "wl_compositor", 4)
[ 854435.824] -> wl_registry@2.global(2, "wl_subcompositor", 1)
[ 854435.848] -> wl_registry@2.global(3, "wp_viewporter", 1)
[ 854435.870] -> wl_registry@2.global(4, "zxdg_output_manager_v1", 2)
[ 854435.894] -> wl_registry@2.global(5, "wp_presentation", 1)
[ 854435.917] -> wl_registry@2.global(6, "zwp_relative_pointer_manager_v1", 1)
[ 854435.940] -> wl_registry@2.global(7, "zwp_pointer_constraints_v1", 1)
[ 854435.962] -> wl_registry@2.global(8, "zwp_input_timestamps_manager_v1", 1)
[ 854435.987] -> wl_registry@2.global(9, "wl_data_device_manager", 3)
[ 854436.009] -> wl_registry@2.global(10, "wl_shm", 1)
[ 854436.034] -> wl_registry@2.global(11, "mali_buffer_sharing", 4)
[ 854436.058] -> wl_registry@2.global(12, "wl_seat", 7)
[ 854436.081] -> wl_registry@2.global(13, "zwp_linux_dmabuf_v1", 3)
[ 854436.103] -> wl_registry@2.global(14, "weston_direct_display_v1", 1)
[ 854436.125] -> wl_registry@2.global(15, "wl_output", 3)
[ 854436.148] -> wl_registry@2.global(16, "wl_output", 3)
[ 854436.172] -> wl_registry@2.global(17, "xdg_wm_base", 3)
[ 854436.195] -> wl_registry@2.global(18, "weston_screenshooter", 1)
[ 854436.342] wl_registry@2.global(1, "wl_compositor", 4)
[ 854436.403] -> wl_registry@2.bind(1, "wl_compositor", 1, new id [unknown]@3)
[ 854436.447] wl_registry@2.global(2, "wl_subcompositor", 1)
[ 854436.511] -> wl_registry@2.bind(2, "wl_subcompositor", 1, new id [unknown]@4)
[ 854436.548] wl_registry@2.global(3, "wp_viewporter", 1)
[ 854436.604] wl_registry@2.global(4, "zxdg_output_manager_v1", 2)
[ 854436.647] wl_registry@2.global(5, "wp_presentation", 1)
[ 854436.699] wl_registry@2.global(6, "zwp_relative_pointer_manager_v1", 1)
[ 854436.741] wl_registry@2.global(7, "zwp_pointer_constraints_v1", 1)
[ 854436.771] wl_registry@2.global(8, "zwp_input_timestamps_manager_v1", 1)
[ 854436.799] wl_registry@2.global(9, "wl_data_device_manager", 3)
[ 854436.856] wl_registry@2.global(10, "wl_shm", 1)
[ 854436.919] -> wl_registry@2.bind(10, "wl_shm", 1, new id [unknown]@5)
[ 854437.105] -> wl_shm@5.create_pool(new id wl_shm_pool@6, fd 5, 4096)
[ 854437.881] -> wl_shm_pool@6.resize(8832)
[ 854438.011] -> wl_shm_pool@6.resize(18624)
[ 854438.077] wl_registry@2.global(11, "mali_buffer_sharing", 4)
[ 854438.139] wl_registry@2.global(12, "wl_seat", 7)
[ 854438.188] -> wl_registry@2.bind(12, "wl_seat", 1, new id [unknown]@7)
[ 854438.263] wl_registry@2.global(13, "zwp_linux_dmabuf_v1", 3)
[ 854438.317] wl_registry@2.global(14, "weston_direct_display_v1", 1)
[ 854438.361] wl_registry@2.global(15, "wl_output", 3)
[ 854438.412] wl_registry@2.global(16, "wl_output", 3)
[ 854438.461] wl_registry@2.global(17, "xdg_wm_base", 3)
[ 854438.501] -> wl_registry@2.bind(17, "xdg_wm_base", 3, new id [unknown]@8)
[ 854438.575] wl_registry@2.global(18, "weston_screenshooter", 1)
[ 854438.620] -> wl_display@1.sync(new id wl_callback@9)
[ 854438.757] wl_registry@2.bind(1, "wl_compositor", 1, new id [unknown]@3)
[ 854438.888] wl_registry@2.bind(2, "wl_subcompositor", 1, new id [unknown]@4)
[ 854438.955] wl_registry@2.bind(10, "wl_shm", 1, new id [unknown]@5)
[ 854438.997] -> wl_shm@5.format(0)
[ 854439.026] -> wl_shm@5.format(1)
[ 854439.048] -> wl_shm@5.format(909199186)
[ 854439.084] -> wl_shm@5.format(842093913)
[ 854439.105] -> wl_shm@5.format(842094158)
[ 854439.118] -> wl_shm@5.format(909203022)
[ 854439.130] -> wl_shm@5.format(1448695129)
[ 854439.159] -> wl_shm@5.format(1448434008)
[ 854439.194] -> wl_shm@5.format(808665665)
[ 854439.221] -> wl_shm@5.format(808665688)
[ 854439.244] wl_shm@5.create_pool(new id wl_shm_pool@6, fd 48, 4096)
[ 854439.373] wl_shm_pool@6.resize(8832)
[ 854439.436] wl_shm_pool@6.resize(18624)
[ 854439.483] wl_registry@2.bind(12, "wl_seat", 1, new id [unknown]@7)
[ 854439.573] -> wl_seat@7.capabilities(6)
[ 854439.608] wl_registry@2.bind(17, "xdg_wm_base", 3, new id [unknown]@8)
[ 854439.700] wl_display@1.sync(new id wl_callback@9)
[ 854439.725] -> wl_callback@9.done(4)
[ 854439.752] -> wl_display@1.delete_id(9)
[ 854439.866] wl_display@1.delete_id(9)
[ 854439.915] wl_shm@5.format(0)
[ 854439.942] wl_shm@5.format(1)
[ 854439.973] wl_shm@5.format(909199186)
[ 854440.002] wl_shm@5.format(842093913)
[ 854440.020] wl_shm@5.format(842094158)
[ 854440.033] wl_shm@5.format(909203022)
[ 854440.057] wl_shm@5.format(1448695129)
[ 854440.073] wl_shm@5.format(1448434008)
[ 854440.102] wl_shm@5.format(808665665)
[ 854440.120] wl_shm@5.format(808665688)
[ 854440.132] wl_seat@7.capabilities(6)
[ 854440.157] -> wl_seat@7.get_keyboard(new id wl_keyboard@10)
[ 854440.192] -> wl_seat@7.get_touch(new id wl_touch@11)
[ 854440.217] wl_callback@9.done(4)
[ 854440.350] -> wl_compositor@3.create_surface(new id wl_surface@9)
[ 854440.398] -> xdg_wm_base@8.get_xdg_surface(new id xdg_surface@12, wl_surface@9)
[ 854440.453] -> xdg_surface@12.get_toplevel(new id xdg_toplevel@13)
[ 854440.490] -> xdg_toplevel@13.set_title("Window Title")
[ 854440.519] -> xdg_toplevel@13.set_app_id("Window Title")
[ 854440.547] -> wl_surface@9.commit()
[ 854440.616] -> wl_shm@5.create_pool(new id wl_shm_pool@14, fd 6, 1536000)
[ 854440.691] -> wl_shm_pool@14.create_buffer(new id wl_buffer@15, 0, 800, 480, 3200, 0)
[ 854462.682] -> wl_surface@9.damage(0, 0, 800, 480)
[ 854462.948] wl_seat@7.get_keyboard(new id wl_keyboard@10)
[ 854463.240] -> wl_keyboard@10.keymap(1, fd 51, 48967)
[ 854463.337] wl_seat@7.get_touch(new id wl_touch@11)
[ 854463.385] wl_compositor@3.create_surface(new id wl_surface@9)
[ 854463.436] xdg_wm_base@8.get_xdg_surface(new id xdg_surface@12, wl_surface@9)
[ 854463.495] xdg_surface@12.get_toplevel(new id xdg_toplevel@13)
[ 854463.543] xdg_toplevel@13.set_title("Window Title")
[ 854463.583] xdg_toplevel@13.set_app_id("Window Title")
[ 854463.617] wl_surface@9.commit()
[ 854463.679] wl_shm@5.create_pool(new id wl_shm_pool@14, fd 49, 1536000)
[ 854463.780] wl_shm_pool@14.create_buffer(new id wl_buffer@15, 0, 800, 480, 3200, 0)
[ 854463.849] wl_surface@9.damage(0, 0, 800, 480)
[ 854463.908] -> xdg_toplevel@13.configure(720, 1280, array[4])
[ 854463.948] -> xdg_surface@12.configure(5)
[ 854468.038] wl_keyboard@10.keymap(1, fd 6, 48967)
[ 854478.215] xdg_toplevel@13.configure(720, 1280, array[4])
[ 854478.301] xdg_surface@12.configure(5)
[ 854478.320] -> xdg_surface@12.ack_configure(5)
[ 854478.339] -> wl_surface@9.attach(wl_buffer@15, 0, 0)
[ 854478.386] -> wl_surface@9.commit()
[ 854478.531] xdg_surface@12.ack_configure(5)
[ 854478.604] wl_surface@9.attach(wl_buffer@15, 0, 0)
[ 854478.686] wl_surface@9.commit()
[13:39:11.613] xdg_surface geometry (800 x 480) is larger than the configured fullscreen state (720 x 1280)[ 854481.880] -> wl_keyboard@7.leave(6, wl_surface@21)
[ 854481.953] -> wl_keyboard@10.enter(7, wl_surface@9, array[0])
[ 854482.028] -> wl_keyboard@10.modifiers(7, 0, 0, 0, 0)
[ 854482.129] -> xdg_toplevel@13.configure(720, 1280, array[8])
[ 854482.201] -> xdg_surface@12.configure(8)
[ 854482.238] -> xdg_toplevel@24.configure(1920, 1080, array[4])
[ 854482.287] -> xdg_surface@23.configure(9)
[ 854499.026] wl_keyboard@10.enter(7, wl_surface@9, array[0])
[ 854499.145] wl_keyboard@10.modifiers(7, 0, 0, 0, 0)
[ 854499.257] xdg_toplevel@13.configure(720, 1280, array[8])
[ 854499.292] xdg_surface@12.configure(8)
[ 854499.310] -> xdg_surface@12.ack_configure(8)
[ 854503.715] wl_display@1.sync(new id wl_callback@31)
[ 854503.778] -> wl_callback@31.done(9)
[ 854503.810] -> wl_display@1.delete_id(31)
[ 854503.836] xdg_surface@23.set_window_geometry(0, 0, 1920, 1080)
[ 854503.915] xdg_toplevel@24.set_min_size(0, 0)
[ 854503.958] xdg_toplevel@24.set_max_size(0, 0)
[ 854504.033] xdg_surface@23.ack_configure(9)
[ 854504.052] wl_surface@21.frame(new id wl_callback@30)
[ 854506.571] -> wl_buffer@15.release()
[ 854515.834] wl_display@1.sync(new id wl_callback@31)
[ 854515.899] -> wl_callback@31.done(9)
[ 854515.948] -> wl_display@1.delete_id(31)
[ 854515.974] wl_surface@21.attach(wl_buffer@29, 0, 0)
[ 854516.012] wl_surface@21.damage(0, 0, 2147483647, 2147483647)
[ 854516.073] wl_surface@21.commit()
[ 854516.128] -> wl_buffer@27.release()
[ 854518.033] -> wl_callback@30.done(554926)
[ 854518.080] -> wl_display@1.delete_id(30)
[ 854519.945] wl_buffer@15.release()
[ 854519.988] -> wl_buffer@15.destroy()
[ 854520.170] -> wl_shm_pool@14.resize(3686400)
[ 854520.235] -> wl_shm_pool@14.create_buffer(new id wl_buffer@16, 0, 720, 1280, 2880, 0)
[ 854531.068] xdg_surface@12.ack_configure(8)
[ 854531.194] wl_buffer@15.destroy()
[ 854531.258] -> wl_display@1.delete_id(15)
[ 854531.365] wl_shm_pool@14.resize(3686400)
[ 854531.644] wl_shm_pool@14.create_buffer(new id wl_buffer@16, 0, 720, 1280, 2880, 0)
[ 854538.898] -> wl_surface@9.damage(0, 0, 720, 533)
[ 854541.451] -> wl_surface@9.damage(0, 533, 720, 533)
[ 854542.765] -> wl_surface@9.damage(0, 1066, 720, 214)
[ 854542.897] -> wl_surface@9.attach(wl_buffer@16, 0, 0)
[ 854542.992] -> wl_surface@9.commit()
[ 854543.162] wl_surface@9.damage(0, 0, 720, 533)
[ 854543.522] wl_surface@9.damage(0, 533, 720, 533)
[ 854543.784] wl_surface@9.damage(0, 1066, 720, 214)
[ 854543.906] wl_surface@9.attach(wl_buffer@16, 0, 0)
[ 854544.304] wl_surface@9.commit()
[ 854555.626] -> wl_buffer@16.release()
[ 854564.729] wl_display@1.delete_id(15)
[ 854564.796] wl_buffer@16.release()
[ 854570.256] -> wl_surface@9.damage(572, 185, 110, 46)
[ 854570.332] -> wl_surface@9.attach(wl_buffer@16, 0, 0)
[ 854570.414] -> wl_surface@9.commit()
[ 854570.565] wl_surface@9.damage(572, 185, 110, 46)
[ 854570.666] wl_surface@9.attach(wl_buffer@16, 0, 0)
[ 854570.718] wl_surface@9.commit()
[ 854572.269] -> wl_buffer@16.release()
[ 854581.056] wl_buffer@16.release()
[ 854591.880] -> wl_surface@9.damage(572, 185, 110, 46)
[ 854591.984] -> wl_surface@9.attach(wl_buffer@16, 0, 0)
[ 854592.079] -> wl_surface@9.commit()
[ 854592.232] wl_surface@9.damage(572, 185, 110, 46)
[ 854592.379] wl_surface@9.attach(wl_buffer@16, 0, 0)
[ 854592.439] wl_surface@9.commit()
[ 854594.091] -> wl_buffer@16.release()
[ 854602.975] wl_buffer@16.release()
[ 903844.951] wl_surface@21.frame(new id wl_callback@30)
[ 903854.355] wl_display@1.sync(new id wl_callback@31)
[ 903854.540] -> wl_callback@31.done(9)
[ 903854.729] -> wl_display@1.delete_id(31)
[ 903854.841] wl_surface@21.attach(wl_buffer@27, 0, 0)
[ 903855.158] wl_surface@21.damage(0, 0, 2147483647, 2147483647)
[ 903855.737] wl_surface@21.commit()
[ 903856.043] -> wl_buffer@29.release()
[ 903862.831] -> wl_callback@30.done(604276)
[ 903862.941] -> wl_display@1.delete_id(30)

[arilink]

I think this problem is about window geometry