On Sat, 10 Dec 2022, Alexey Lukyanchuk <skif@xxxxxxxxxxx> wrote:
> Dell wyse 3040 cat't poweroff aftet kernel 5.11.
> It happens because i915_driver_shutdown function.
> Disabling of this function mitigate this problem.
>
> Fixes: 440b354f3 ("drivers/gpu/drm:power off troubles on dell wyse 3040")
Fixes: is supposed to reference an existing commit.
> Signed-off-by: Alexey Lukyanchuk <skif@xxxxxxxxxxx>
> ---
> There is trouble with i915_driver_shutdown function. After some diving I found that trouble looks like race condition in drm_atomic_get_connector_state function (drivers/gpu/drm/drm_atomic.c), maybe it linked to iterators. Now I fully exclude i915_driver_shutdown for wyse 3040 device.
>
> Can any one comment on this one please ?
Bypassing the entire shutdown function is not an acceptable quirk.
Please file a bug over at fdo gitlab [1]. Add drm.debug=0xe module
parameter, and attach dmesg from boot to reproducing the problem. Add
log_buf_len=8M or similar as necessary to get the complete dmesg.
Have you tried the more recent kernels?
BR,
Jani.
[1] https://gitlab.freedesktop.org/drm/intel/wikis/How-to-file-i915-bugs
> ---
> drivers/gpu/drm/i915/display/intel_quirks.c | 25 +++++++++++++++++++++
> drivers/gpu/drm/i915/i915_driver.c | 3 +++
> drivers/gpu/drm/i915/i915_drv.h | 1 +
> 3 files changed, 29 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_quirks.c b/drivers/gpu/drm/i915/display/intel_quirks.c
> index e415cd7c0..a6a549d48 100644
> --- a/drivers/gpu/drm/i915/display/intel_quirks.c
> +++ b/drivers/gpu/drm/i915/display/intel_quirks.c
> @@ -60,6 +60,12 @@ static void quirk_no_pps_backlight_power_hook(struct drm_i915_private *i915)
> drm_info(&i915->drm, "Applying no pps backlight power quirk\n");
> }
>
> +static void quirk_wyse_3040_shutdown_fix(struct drm_i915_private *i915)
> +{
> + i915->quirks |= QUIRK_WYSE_3040_SHUTDOWN_FIX;
> + drm_info(&i915->drm, "Applying wyse 3040 shutdown fix\n");
> +}
> +
> struct intel_quirk {
> int device;
> int subsystem_vendor;
> @@ -85,6 +91,12 @@ static int intel_dmi_no_pps_backlight(const struct dmi_system_id *id)
> return 1;
> }
>
> +static int wyse_3040_shutdown_fix(const struct dmi_system_id *id)
> +{
> + DRM_INFO("This device need help with poweroff %s\n", id->ident);
> + return 1;
> +}
> +
> static const struct intel_dmi_quirk intel_dmi_quirks[] = {
> {
> .dmi_id_list = &(const struct dmi_system_id[]) {
> @@ -131,6 +143,19 @@ static const struct intel_dmi_quirk intel_dmi_quirks[] = {
> },
> .hook = quirk_no_pps_backlight_power_hook,
> },
> + {
> + .dmi_id_list = &(const struct dmi_system_id[]) {
> + {
> + .callback = wyse_3040_shutdown_fix,
> + .ident = "Dell Inc. 0G56C0",
> + .matches = {DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "Dell Inc."),
> + DMI_EXACT_MATCH(DMI_BOARD_NAME, "0G56C0"),
> + },
> + },
> + { }
> + },
> + .hook = quirk_wyse_3040_shutdown_fix,
> + },
> };
>
> static struct intel_quirk intel_quirks[] = {
> diff --git a/drivers/gpu/drm/i915/i915_driver.c b/drivers/gpu/drm/i915/i915_driver.c
> index deb8a8b76..af60fb79a 100644
> --- a/drivers/gpu/drm/i915/i915_driver.c
> +++ b/drivers/gpu/drm/i915/i915_driver.c
> @@ -1079,6 +1079,9 @@ static void intel_shutdown_encoders(struct drm_i915_private *dev_priv)
>
> void i915_driver_shutdown(struct drm_i915_private *i915)
> {
> + if (!(i915->quirks & QUIRK_WYSE_3040_SHUTDOWN_FIX))
> + return;
> +
> disable_rpm_wakeref_asserts(&i915->runtime_pm);
> intel_runtime_pm_disable(&i915->runtime_pm);
> intel_power_domains_disable(i915);
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 086bbe894..fdd6866e7 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -200,6 +200,7 @@ struct drm_i915_display_funcs {
> #define QUIRK_INCREASE_T12_DELAY (1<<6)
> #define QUIRK_INCREASE_DDI_DISABLED_TIME (1<<7)
> #define QUIRK_NO_PPS_BACKLIGHT_POWER_HOOK (1<<8)
> +#define QUIRK_WYSE_3040_SHUTDOWN_FIX (1<<9)
>
> struct i915_suspend_saved_registers {
> u32 saveDSPARB;
--
Jani Nikula, Intel Open Source Graphics Center
