From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 From: Jan200101 Date: Wed, 8 Mar 2023 20:51:16 +0100 Subject: [PATCH] drm/i915: add kernel parameter to disable async page flipping Signed-off-by: Jan200101 --- drivers/gpu/drm/i915/display/intel_display.c | 2 +- drivers/gpu/drm/i915/i915_params.c | 4 ++++ drivers/gpu/drm/i915/i915_params.h | 3 ++- 3 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index de77054195c6..43dbab8c46d0 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -8600,7 +8600,7 @@ static void intel_mode_config_init(struct drm_i915_private *i915) mode_config->funcs = &intel_mode_funcs; mode_config->helper_private = &intel_mode_config_funcs; - mode_config->async_page_flip = HAS_ASYNC_FLIPS(i915); + mode_config->async_page_flip = HAS_ASYNC_FLIPS(i915) && !i915->params.disable_async_page_flip; /* * Maximum framebuffer dimensions, chosen to match diff --git a/drivers/gpu/drm/i915/i915_params.c b/drivers/gpu/drm/i915/i915_params.c index d1e4d528cb17..b1281fcdc47b 100644 --- a/drivers/gpu/drm/i915/i915_params.c +++ b/drivers/gpu/drm/i915/i915_params.c @@ -219,6 +219,10 @@ i915_param_named_unsafe(lmem_size, uint, 0400, i915_param_named_unsafe(lmem_bar_size, uint, 0400, "Set the lmem bar size(in MiB)."); +i915_param_named_unsafe(disable_async_page_flip, bool, 0400, + "Disable async page flipping" + "(0=disabled [default], 1=enabled)"); + static __always_inline void _print_param(struct drm_printer *p, const char *name, const char *type, diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h index 2733cb6cfe09..d7b891bbd12b 100644 --- a/drivers/gpu/drm/i915/i915_params.h +++ b/drivers/gpu/drm/i915/i915_params.h @@ -84,7 +84,8 @@ struct drm_printer; param(bool, verbose_state_checks, true, 0) \ param(bool, nuclear_pageflip, false, 0400) \ param(bool, enable_dp_mst, true, 0600) \ - param(bool, enable_gvt, false, IS_ENABLED(CONFIG_DRM_I915_GVT) ? 0400 : 0) + param(bool, enable_gvt, false, IS_ENABLED(CONFIG_DRM_I915_GVT) ? 0400 : 0) \ + param(bool, disable_async_page_flip, false, 0400) #define MEMBER(T, member, ...) T member; struct i915_params {