From: Gustavo Sousa Date: Thu, 19 Dec 2024 22:14:16 +0000 (-0300) Subject: drm/i915/dmc_wl: Allow enable_dmc_wl=3 to mean "always locked" X-Git-Tag: v6.15-rc1~120^2~16^2~281 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=34e47bdbad0353acaf1eeecea64ffa711061b65c;p=thirdparty%2Flinux.git drm/i915/dmc_wl: Allow enable_dmc_wl=3 to mean "always locked" When debugging issues that might be related to the DMC wakelock code, it might be useful to compare runs with the lock acquired while DC states are enabled vs the regular case. If issues disappear with the former, it might be a symptom of something wrong in our code. Support having this "always locked" behavior with enable_dmc_wl=3. Signed-off-by: Gustavo Sousa Reviewed-by: Dnyaneshwar Bhadane Link: https://patchwork.freedesktop.org/patch/msgid/20241219221429.109668-5-gustavo.sousa@intel.com Signed-off-by: Matt Roper --- diff --git a/drivers/gpu/drm/i915/display/intel_display_params.c b/drivers/gpu/drm/i915/display/intel_display_params.c index f0f388f38fa7d..c4f1ab43fc0c8 100644 --- a/drivers/gpu/drm/i915/display/intel_display_params.c +++ b/drivers/gpu/drm/i915/display/intel_display_params.c @@ -130,7 +130,7 @@ intel_display_param_named_unsafe(enable_psr2_sel_fetch, bool, 0400, intel_display_param_named_unsafe(enable_dmc_wl, int, 0400, "Enable DMC wakelock " - "(-1=use per-chip default, 0=disabled, 1=enabled, 2=match any register) " + "(-1=use per-chip default, 0=disabled, 1=enabled, 2=match any register, 3=always locked) " "Default: -1"); __maybe_unused diff --git a/drivers/gpu/drm/i915/display/intel_dmc_wl.c b/drivers/gpu/drm/i915/display/intel_dmc_wl.c index d442a150b3274..1bdc08e6aa452 100644 --- a/drivers/gpu/drm/i915/display/intel_dmc_wl.c +++ b/drivers/gpu/drm/i915/display/intel_dmc_wl.c @@ -57,6 +57,7 @@ enum { ENABLE_DMC_WL_DISABLED, ENABLE_DMC_WL_ENABLED, ENABLE_DMC_WL_ANY_REGISTER, + ENABLE_DMC_WL_ALWAYS_LOCKED, ENABLE_DMC_WL_MAX, }; @@ -312,6 +313,9 @@ static void intel_dmc_wl_sanitize_param(struct intel_display *display) case ENABLE_DMC_WL_ANY_REGISTER: desc = "match any register"; break; + case ENABLE_DMC_WL_ALWAYS_LOCKED: + desc = "always locked"; + break; default: desc = "unknown"; break; @@ -332,7 +336,8 @@ void intel_dmc_wl_init(struct intel_display *display) INIT_DELAYED_WORK(&wl->work, intel_dmc_wl_work); spin_lock_init(&wl->lock); - refcount_set(&wl->refcount, 0); + refcount_set(&wl->refcount, + display->params.enable_dmc_wl == ENABLE_DMC_WL_ALWAYS_LOCKED ? 1 : 0); } /* Must only be called as part of enabling dynamic DC states. */