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drm/tegra: Add conftest support

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Instead of relying on kernel version to determine if certain functions
or structure are present in the kernel, use the conftest.sh script to
test which functions, structures, etc are present at compile time. This
is beneficial for working with 3rd party Linux kernels that may have
back-ported upstream changes into their kernel and so the kernel version
checks do not work.

Bug 4119327

Change-Id: If315b18af74c830e9ba3993208de3a3326c4187d
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2984415
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Jon Hunter
2023-09-24 14:35:03 +01:00
committed by mobile promotions
parent 040c0ad65f
commit 5a26b0ef9d
8 changed files with 206 additions and 27 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
scripts/conftest/Makefile
View File

@@ -43,7 +43,7 @@ NV_CONFTEST_CMD := /bin/sh $(NV_CONFTEST_SCRIPT) \
NV_CFLAGS_FROM_CONFTEST := $(shell $(NV_CONFTEST_CMD) build_cflags)
NV_CONFTEST_CFLAGS = $(NV_CFLAGS_FROM_CONFTEST) $(EXTRA_CFLAGS) -fno-pie
NV_CONFTEST_CFLAGS = $(NV_CFLAGS_FROM_CONFTEST) $(EXTRA_CFLAGS) -fno-pie -Werror
NV_CONFTEST_COMPILE_TEST_HEADERS := $(obj)/conftest/macros.h
NV_CONFTEST_COMPILE_TEST_HEADERS += $(obj)/conftest/functions.h
@@ -89,7 +89,15 @@ endef
#
NV_CONFTEST_FUNCTION_COMPILE_TESTS += devm_thermal_of_zone_register
NV_CONFTEST_FUNCTION_COMPILE_TESTS += drm_aperture_remove_framebuffers_has_drm_driver_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += drm_driver_struct_has_irq_enabled_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += drm_fb_helper_alloc_info
NV_CONFTEST_FUNCTION_COMPILE_TESTS += drm_fb_helper_prepare_has_preferred_bpp_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += drm_fb_helper_unregister_info
NV_CONFTEST_FUNCTION_COMPILE_TESTS += drm_fb_helper_struct_has_info_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += drm_mode_config_struct_has_fb_base_arg
NV_CONFTEST_FUNCTION_COMPILE_TESTS += iio_dev_opaque_has_mlock
NV_CONFTEST_FUNCTION_COMPILE_TESTS += iommu_map_has_gfp_arg
NV_CONFTEST_GENERIC_COMPILE_TESTS ?=
NV_CONFTEST_MACRO_COMPILE_TESTS ?=
NV_CONFTEST_SYMBOL_COMPILE_TESTS ?=
@@ -109,6 +117,12 @@ $(obj)/conftest/patches.h: $(NV_CONFTEST_SCRIPT)
# Each of these headers is checked for presence with a test #include; a
# corresponding #define will be generated in conftest/headers.h.
NV_HEADER_PRESENCE_TESTS = \
drm/display/drm_dp_aux_bus.h \
drm/display/drm_dp_helper.h \
drm/display/drm_scdc_helper.h \
drm/dp/drm_dp_aux_bus.h \
drm/dp/drm_dp_helper.h \
drm/drm_dp_aux_bus.h \
generated/autoconf.h \
linux/kconfig.h \
linux/iosys-map.h

156
scripts/conftest/conftest.sh
View File

@@ -6310,6 +6310,162 @@ compile_test() {
compile_check_conftest "$CODE" "NV_DEVM_THERMAL_OF_ZONE_REGISTER_PRESENT" "" "functions"
;;
drm_aperture_remove_framebuffers_has_drm_driver_arg)
#
# Determine if the function 'drm_aperture_remove_framebuffers'
# has the 'struct drm_driver' argument.
#
# Commit 97c9bfe3f660 ("drm/aperture: Pass DRM driver structure
# instead of driver name") updated the arguments for the function
# drm_aperture_remove_framebuffers to pass 'struct drm_driver' in
# Linux v5.15.
#
CODE="
#include <drm/drm_aperture.h>
int conftest_drm_aperture_remove_framebuffers_has_drm_driver_arg(
bool primary, const struct drm_driver *req_driver) {
return drm_aperture_remove_framebuffers(primary, req_driver);
}"
compile_check_conftest "$CODE" "NV_DRM_APERTURE_REMOVE_FRAMEBUFFERS_HAS_DRM_DRIVER_ARG" "" "types"
;;
drm_driver_struct_has_irq_enabled_arg)
#
# Determine if the 'drm_driver' structure
# has the 'irq_enabled' argument.
#
# Commit c1736b9008cb ("drm: IRQ midlayer is now legacy") moved
# the irq_enabled member of the drm_driver struct under
# CONFIG_DRM_LEGACY in Linux v5.15.
#
CODE="
#include <drm/drm_device.h>
int conftest_drm_driver_struct_has_irq_enabled_arg(void) {
return offsetof(struct drm_driver, irq_enabled);
}"
compile_check_conftest "$CODE" "NV_DRM_DRIVER_STRUCT_HAS_IRQ_ENABLED_ARG" "" "types"
;;
drm_fb_helper_alloc_info)
#
# Determine if the function 'drm_fb_helper_alloc_info' is present.
#
# Commit 7fd50bc39d12 ("drm/fb-helper: Rename drm_fb_helper_alloc_fbi()
# to use _info postfix") renamed the function drm_fb_helper_alloc_fbi to
# drm_fb_helper_alloc_info in Linux v6.2.
#
CODE="
#undef CONFIG_ACPI
#include <drm/drm_fb_helper.h>
void conftest_drm_fb_helper_alloc_info(void)
{
drm_fb_helper_alloc_info();
}"
compile_check_conftest "$CODE" "NV_DRM_FB_HELPER_ALLOC_INFO_PRESENT" "" "functions"
;;
drm_fb_helper_prepare_has_preferred_bpp_arg)
#
# Determine if the function 'drm_fb_helper_prepare' has the
# argument 'preferred_bpp'.
#
# Commit 6c80a93be62d ("drm/fb-helper: Initialize fb-helper's
# preferred BPP in prepare function") added the 'preferred_bpp'
# argument to the function drm_fb_helper_prepare in Linux v6.3.
#
CODE="
#undef CONFIG_ACPI
#include <drm/drm_fb_helper.h>
void conftest_drm_fb_helper_prepare(struct drm_device *dev,
struct drm_fb_helper *helper,
unsigned int preferred_bpp,
const struct drm_fb_helper_funcs *funcs) {
drm_fb_helper_prepare(dev, helper, preferred_bpp, funcs);
}"
compile_check_conftest "$CODE" "NV_DRM_FB_HELPER_PREPARE_HAS_PREFERRED_BPP_ARG" "" "types"
;;
drm_fb_helper_struct_has_info_arg)
#
# Determine if the 'drm_fb_helper' structure has the 'info' member.
#
# Commit 9877d8f6bc37 ("drm/fb_helper: Rename field fbdev to info in
# struct drm_fb_helper") renaned the fbdev member of the
# drm_fb_helper structure to info in Linux v6.2.
#
CODE="
#undef CONFIG_ACPI
#include <drm/drm_fb_helper.h>
int conftest_drm_fb_helper_struct_has_info_arg(void) {
return offsetof(struct drm_fb_helper, info);
}"
compile_check_conftest "$CODE" "NV_DRM_FB_HELPER_STRUCT_HAS_INFO_ARG" "" "types"
;;
drm_fb_helper_unregister_info)
#
# Determine if function drm_fb_helper_unregister_info is present.
#
# Commit afb0ff78c13c ("drm/fb-helper: Rename
# drm_fb_helper_unregister_fbi() to use _info postfix") renamed the
# function drm_fb_helper_unregister_fbi to drm_fb_helper_unregister_info
# in Linux v6.2.
#
CODE="
#undef CONFIG_ACPI
#include <drm/drm_fb_helper.h>
void conftest_drm_fb_helper_unregister_info(void)
{
drm_fb_helper_unregister_info();
}
"
compile_check_conftest "$CODE" "NV_DRM_FB_HELPER_UNREGISTER_INFO_PRESENT" "" "functions"
;;
drm_mode_config_struct_has_fb_base_arg)
#
# Determine if the 'drm_mode_config' structure has the 'fb_base' argument.
#
# Commit 7c99616e3fe7 ("drm: Remove drm_mode_config::fb_base") removed the
# fb_base member from the drm_mode_config structure in Linux v6.2.
#
CODE="
#include <drm/drm_mode_config.h>
int conftest_drm_mode_config_struct_has_fb_base_arg(void) {
return offsetof(struct drm_mode_config, fb_base);
}"
compile_check_conftest "$CODE" "NV_DRM_MODE_CONFIG_STRUCT_HAS_FB_BASE_ARG" "" "types"
;;
iommu_map_has_gfp_arg)
#
# Determine if iommu_map() has 'gfp' argument.
#
# Commit 1369459b2e21 ("iommu: Add a gfp parameter to iommu_map()")
# added a 'gfp' argument to the iommu_map function in Linux v6.3.
#
CODE="
#include <linux/iommu.h>
void conftest_iommu_map_has_gfp_arg(
struct iommu_domain *domain,
unsigned long iova,
phys_addr_t paddr,
size_t size,
int prot,
gfp_t gfp) {
iommu_map(domain, iova, paddr, size, prot, gfp);
}"
compile_check_conftest "$CODE" "NV_IOMMU_MAP_HAS_GFP_ARG" "" "types"
;;
iio_dev_opaque_has_mlock)
#
# Determine if the 'iio_dev_opaque' structure has 'mlock' field.