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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Jan200101 <sentrycraft123@gmail.com>
Date: Sat, 30 Mar 2024 19:20:48 +0100
Subject: [PATCH] drm/i915: add kernel parameter to disable async page flipping
Signed-off-by: Jan200101 <sentrycraft123@gmail.com>
---
drivers/gpu/drm/i915/display/intel_display_driver.c | 2 +-
drivers/gpu/drm/i915/i915_params.c | 4 ++++
drivers/gpu/drm/i915/i915_params.h | 3 ++-
drivers/gpu/drm/xe/xe_device_types.h | 1 +
4 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_driver.c b/drivers/gpu/drm/i915/display/intel_display_driver.c
index 9df9097a0255..24c084420441 100644
--- a/drivers/gpu/drm/i915/display/intel_display_driver.c
+++ b/drivers/gpu/drm/i915/display/intel_display_driver.c
@@ -125,7 +125,7 @@ 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 de43048543e8..2c6fe740609e 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -134,6 +134,10 @@ 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 void _param_print_bool(struct drm_printer *p, const char *name,
bool val)
{
diff --git a/drivers/gpu/drm/i915/i915_params.h b/drivers/gpu/drm/i915/i915_params.h
index 1315d7fac850..53d47b1ef79e 100644
--- a/drivers/gpu/drm/i915/i915_params.h
+++ b/drivers/gpu/drm/i915/i915_params.h
@@ -64,7 +64,8 @@ struct drm_printer;
/* leave bools at the end to not create holes */ \
param(bool, enable_hangcheck, true, 0600) \
param(bool, error_capture, true, IS_ENABLED(CONFIG_DRM_I915_CAPTURE_ERROR) ? 0600 : 0) \
- 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 {
diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
index e8491979a6f2..4682970746c3 100644
--- a/drivers/gpu/drm/xe/xe_device_types.h
+++ b/drivers/gpu/drm/xe/xe_device_types.h
@@ -498,6 +498,7 @@ struct xe_device {
};
struct {
const char *dmc_firmware_path;
+ bool disable_async_page_flip;
} params;
void *pxp;
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