Move DisplayPort functions into a separate module to reduce the size of the KMS helpers. Select DRM_DP_HELPER for all users of the code. To avoid naming conflicts, rename drm_dp_helper.c to drm_dp.c
This change can help to reduce the size of the kernel binary. Some numbers from a x86-64 test build:
Before: drm_kms_helper.ko: 447480 bytes
After: drm_dp_helper.ko: 216632 bytes drm_kms_helper.ko: 239424 bytes
For early-boot graphics, generic DRM drivers, such as simpledrm, require DRM KMS helpers to be built into the kernel. Generic helper functions for DisplayPort take up a significant portion of DRM KMS helper library. These functions are not used by generic drivers and can be loaded as a module.
Signed-off-by: Thomas Zimmermann tzimmermann@suse.de --- drivers/gpu/drm/Kconfig | 8 +++++++ drivers/gpu/drm/Makefile | 14 +++++++----- drivers/gpu/drm/bridge/Kconfig | 4 ++++ drivers/gpu/drm/bridge/analogix/Kconfig | 2 ++ drivers/gpu/drm/bridge/cadence/Kconfig | 1 + drivers/gpu/drm/{drm_dp_helper.c => drm_dp.c} | 0 drivers/gpu/drm/drm_dp_helper_mod.c | 22 +++++++++++++++++++ drivers/gpu/drm/drm_kms_helper_common.c | 15 ------------- drivers/gpu/drm/i915/Kconfig | 1 + drivers/gpu/drm/msm/Kconfig | 1 + drivers/gpu/drm/nouveau/Kconfig | 1 + drivers/gpu/drm/rockchip/Kconfig | 1 + drivers/gpu/drm/tegra/Kconfig | 1 + drivers/gpu/drm/xlnx/Kconfig | 1 + 14 files changed, 51 insertions(+), 21 deletions(-) rename drivers/gpu/drm/{drm_dp_helper.c => drm_dp.c} (100%) create mode 100644 drivers/gpu/drm/drm_dp_helper_mod.c
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index b1f22e457fd0..91f54aeb0b7c 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -80,6 +80,12 @@ config DRM_DEBUG_SELFTEST
If in doubt, say "N".
+config DRM_DP_HELPER + tristate + depends on DRM + help + DRM helpers for DisplayPort. + config DRM_KMS_HELPER tristate depends on DRM @@ -236,6 +242,7 @@ config DRM_RADEON depends on DRM && PCI && MMU depends on AGP || !AGP select FW_LOADER + select DRM_DP_HELPER select DRM_KMS_HELPER select DRM_TTM select DRM_TTM_HELPER @@ -256,6 +263,7 @@ config DRM_AMDGPU tristate "AMD GPU" depends on DRM && PCI && MMU select FW_LOADER + select DRM_DP_HELPER select DRM_KMS_HELPER select DRM_SCHED select DRM_TTM diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 301a44dc18e3..d17319c835b3 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -48,23 +48,25 @@ obj-$(CONFIG_DRM_VRAM_HELPER) += drm_vram_helper.o drm_ttm_helper-y := drm_gem_ttm_helper.o obj-$(CONFIG_DRM_TTM_HELPER) += drm_ttm_helper.o
-drm_kms_helper-y := drm_bridge_connector.o drm_crtc_helper.o drm_dp_helper.o \ +drm_kms_helper-y := drm_bridge_connector.o drm_crtc_helper.o \ drm_dsc.o drm_encoder_slave.o drm_flip_work.o drm_hdcp.o \ drm_probe_helper.o \ - drm_plane_helper.o drm_dp_mst_topology.o drm_atomic_helper.o \ - drm_kms_helper_common.o drm_dp_dual_mode_helper.o \ + drm_plane_helper.o drm_atomic_helper.o \ + drm_kms_helper_common.o \ drm_simple_kms_helper.o drm_modeset_helper.o \ drm_scdc_helper.o drm_gem_atomic_helper.o \ drm_gem_framebuffer_helper.o \ drm_atomic_state_helper.o drm_damage_helper.o \ drm_format_helper.o drm_self_refresh_helper.o drm_rect.o - drm_kms_helper-$(CONFIG_DRM_PANEL_BRIDGE) += bridge/panel.o drm_kms_helper-$(CONFIG_DRM_FBDEV_EMULATION) += drm_fb_helper.o -drm_kms_helper-$(CONFIG_DRM_DP_AUX_CHARDEV) += drm_dp_aux_dev.o -drm_kms_helper-$(CONFIG_DRM_DP_CEC) += drm_dp_cec.o + +drm_dp_helper-y := drm_dp.o drm_dp_dual_mode_helper.o drm_dp_helper_mod.o drm_dp_mst_topology.o +drm_dp_helper-$(CONFIG_DRM_DP_AUX_CHARDEV) += drm_dp_aux_dev.o +drm_dp_helper-$(CONFIG_DRM_DP_CEC) += drm_dp_cec.o
obj-$(CONFIG_DRM_KMS_HELPER) += drm_kms_helper.o +obj-$(CONFIG_DRM_DP_HELPER) += drm_dp_helper.o obj-$(CONFIG_DRM_DEBUG_SELFTEST) += selftests/
obj-$(CONFIG_DRM) += drm.o diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 61db5a66b493..a27435a4c9c4 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -183,6 +183,7 @@ config DRM_PARADE_PS8640 tristate "Parade PS8640 MIPI DSI to eDP Converter" depends on OF select DRM_DP_AUX_BUS + select DRM_DP_HELPER select DRM_KMS_HELPER select DRM_MIPI_DSI select DRM_PANEL @@ -253,6 +254,7 @@ config DRM_TOSHIBA_TC358764 config DRM_TOSHIBA_TC358767 tristate "Toshiba TC358767 eDP bridge" depends on OF + select DRM_DP_HELPER select DRM_KMS_HELPER select REGMAP_I2C select DRM_PANEL @@ -272,6 +274,7 @@ config DRM_TOSHIBA_TC358768 config DRM_TOSHIBA_TC358775 tristate "Toshiba TC358775 DSI/LVDS bridge" depends on OF + select DRM_DP_HELPER select DRM_KMS_HELPER select REGMAP_I2C select DRM_PANEL @@ -299,6 +302,7 @@ config DRM_TI_SN65DSI83 config DRM_TI_SN65DSI86 tristate "TI SN65DSI86 DSI to eDP bridge" depends on OF + select DRM_DP_HELPER select DRM_KMS_HELPER select REGMAP_I2C select DRM_PANEL diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig index 2ef6eb2b786c..319ba0df57be 100644 --- a/drivers/gpu/drm/bridge/analogix/Kconfig +++ b/drivers/gpu/drm/bridge/analogix/Kconfig @@ -3,6 +3,7 @@ config DRM_ANALOGIX_ANX6345 tristate "Analogix ANX6345 bridge" depends on OF select DRM_ANALOGIX_DP + select DRM_DP_HELPER select DRM_KMS_HELPER select REGMAP_I2C help @@ -14,6 +15,7 @@ config DRM_ANALOGIX_ANX6345 config DRM_ANALOGIX_ANX78XX tristate "Analogix ANX78XX bridge" select DRM_ANALOGIX_DP + select DRM_DP_HELPER select DRM_KMS_HELPER select REGMAP_I2C help diff --git a/drivers/gpu/drm/bridge/cadence/Kconfig b/drivers/gpu/drm/bridge/cadence/Kconfig index ef8c230e0f62..de697bade05e 100644 --- a/drivers/gpu/drm/bridge/cadence/Kconfig +++ b/drivers/gpu/drm/bridge/cadence/Kconfig @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0-only config DRM_CDNS_MHDP8546 tristate "Cadence DPI/DP bridge" + select DRM_DP_HELPER select DRM_KMS_HELPER select DRM_PANEL_BRIDGE depends on OF diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp.c similarity index 100% rename from drivers/gpu/drm/drm_dp_helper.c rename to drivers/gpu/drm/drm_dp.c diff --git a/drivers/gpu/drm/drm_dp_helper_mod.c b/drivers/gpu/drm/drm_dp_helper_mod.c new file mode 100644 index 000000000000..db753de24000 --- /dev/null +++ b/drivers/gpu/drm/drm_dp_helper_mod.c @@ -0,0 +1,22 @@ +// SPDX-License-Identifier: MIT + +#include <linux/module.h> + +#include "drm_dp_helper_internal.h" + +MODULE_DESCRIPTION("DRM DisplayPort helper"); +MODULE_LICENSE("GPL and additional rights"); + +static int __init drm_dp_helper_module_init(void) +{ + return drm_dp_aux_dev_init(); +} + +static void __exit drm_dp_helper_module_exit(void) +{ + /* Call exit functions from specific dp helpers here */ + drm_dp_aux_dev_exit(); +} + +module_init(drm_dp_helper_module_init); +module_exit(drm_dp_helper_module_exit); diff --git a/drivers/gpu/drm/drm_kms_helper_common.c b/drivers/gpu/drm/drm_kms_helper_common.c index 88260d26409c..8be20080cd8d 100644 --- a/drivers/gpu/drm/drm_kms_helper_common.c +++ b/drivers/gpu/drm/drm_kms_helper_common.c @@ -29,7 +29,6 @@
#include <drm/drm_print.h>
-#include "drm_dp_helper_internal.h" #include "drm_crtc_helper_internal.h"
MODULE_AUTHOR("David Airlie, Jesse Barnes"); @@ -62,17 +61,3 @@ MODULE_PARM_DESC(edid_firmware, "DEPRECATED. Use drm.edid_firmware module parameter instead.");
#endif - -static int __init drm_kms_helper_init(void) -{ - return drm_dp_aux_dev_init(); -} - -static void __exit drm_kms_helper_exit(void) -{ - /* Call exit functions from specific kms helpers here */ - drm_dp_aux_dev_exit(); -} - -module_init(drm_kms_helper_init); -module_exit(drm_kms_helper_exit); diff --git a/drivers/gpu/drm/i915/Kconfig b/drivers/gpu/drm/i915/Kconfig index a4c94dc2e216..b68e8b551b83 100644 --- a/drivers/gpu/drm/i915/Kconfig +++ b/drivers/gpu/drm/i915/Kconfig @@ -9,6 +9,7 @@ config DRM_I915 # the shmem_readpage() which depends upon tmpfs select SHMEM select TMPFS + select DRM_DP_HELPER select DRM_KMS_HELPER select DRM_PANEL select DRM_MIPI_DSI diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig index 39197b4beea7..75015b0e165e 100644 --- a/drivers/gpu/drm/msm/Kconfig +++ b/drivers/gpu/drm/msm/Kconfig @@ -12,6 +12,7 @@ config DRM_MSM select IOMMU_IO_PGTABLE select QCOM_MDT_LOADER if ARCH_QCOM select REGULATOR + select DRM_DP_HELPER select DRM_KMS_HELPER select DRM_PANEL select DRM_BRIDGE diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig index 9436310d0854..3ec690b6f0b4 100644 --- a/drivers/gpu/drm/nouveau/Kconfig +++ b/drivers/gpu/drm/nouveau/Kconfig @@ -4,6 +4,7 @@ config DRM_NOUVEAU depends on DRM && PCI && MMU select IOMMU_API select FW_LOADER + select DRM_DP_HELPER select DRM_KMS_HELPER select DRM_TTM select DRM_TTM_HELPER diff --git a/drivers/gpu/drm/rockchip/Kconfig b/drivers/gpu/drm/rockchip/Kconfig index 9f1ecefc3933..d59dca5efb52 100644 --- a/drivers/gpu/drm/rockchip/Kconfig +++ b/drivers/gpu/drm/rockchip/Kconfig @@ -2,6 +2,7 @@ config DRM_ROCKCHIP tristate "DRM Support for Rockchip" depends on DRM && ROCKCHIP_IOMMU + select DRM_DP_HELPER select DRM_GEM_CMA_HELPER select DRM_KMS_HELPER select DRM_PANEL diff --git a/drivers/gpu/drm/tegra/Kconfig b/drivers/gpu/drm/tegra/Kconfig index 1650a448eabd..dc88adc7ba40 100644 --- a/drivers/gpu/drm/tegra/Kconfig +++ b/drivers/gpu/drm/tegra/Kconfig @@ -5,6 +5,7 @@ config DRM_TEGRA depends on COMMON_CLK depends on DRM depends on OF + select DRM_DP_HELPER select DRM_KMS_HELPER select DRM_MIPI_DSI select DRM_PANEL diff --git a/drivers/gpu/drm/xlnx/Kconfig b/drivers/gpu/drm/xlnx/Kconfig index d8d38d86d5c6..06cf477dbcdd 100644 --- a/drivers/gpu/drm/xlnx/Kconfig +++ b/drivers/gpu/drm/xlnx/Kconfig @@ -6,6 +6,7 @@ config DRM_ZYNQMP_DPSUB depends on PHY_XILINX_ZYNQMP depends on XILINX_ZYNQMP_DPDMA select DMA_ENGINE + select DRM_DP_HELPER select DRM_GEM_CMA_HELPER select DRM_KMS_HELPER select GENERIC_PHY