[Nouveau] [PATCH 0/3] drm/dp: Move DisplayPort helpers into own module

[Nouveau] [PATCH 0/3] drm/dp: Move DisplayPort helpers into own module

[Thomas Zimmermann]

Split-off DisplayPort functions from KMS helper library and move them
into their own module. Reduces the size of drm_kms_helper.ko by ~50%.

This patchset is part of an on-going effort to reduce the minimum
binary size of the DRM core and helpers. It's helpful for systems with
early-boot DRM graphics, which requires DRM to be linked into the
kernel image.

Thomas Zimmermann (3):
  drm/dp_mst: Remove trailing whitespace.
  drm/dp: Move DP declarations into separate header file
  drm/dp: Move DisplayPort helpers into separate helper module

 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_crtc_helper_internal.h    | 27 ------------------
 drivers/gpu/drm/{drm_dp_helper.c => drm_dp.c} |  2 +-
 drivers/gpu/drm/drm_dp_aux_dev.c              |  2 +-
 drivers/gpu/drm/drm_dp_helper_internal.h      | 28 +++++++++++++++++++
 drivers/gpu/drm/drm_dp_helper_mod.c           | 22 +++++++++++++++
 drivers/gpu/drm/drm_dp_mst_topology.c         |  4 +--
 drivers/gpu/drm/drm_kms_helper_common.c       | 14 ----------
 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 +
 18 files changed, 83 insertions(+), 51 deletions(-)
 rename drivers/gpu/drm/{drm_dp_helper.c => drm_dp.c} (99%)
 create mode 100644 drivers/gpu/drm/drm_dp_helper_internal.h
 create mode 100644 drivers/gpu/drm/drm_dp_helper_mod.c


base-commit: 3f422828221d9ceefcddef0be33561b1646a1cbe
prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d
prerequisite-patch-id: c67e5d886a47b7d0266d81100837557fda34cb24
--
2.34.1

[Nouveau] [PATCH 1/3] drm/dp_mst: Remove trailing whitespace.

[Thomas Zimmermann]

Fix coding style.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/drm_dp_mst_topology.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index f3d79eda94bb..7f0ff96261cf 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -4811,7 +4811,7 @@ static void drm_dp_mst_dump_mstb(struct seq_file *m,
 
 	seq_printf(m, "%smstb - [%p]: num_ports: %d\n", prefix, mstb, mstb->num_ports);
 	list_for_each_entry(port, &mstb->ports, next) {
-		seq_printf(m, "%sport %d - [%p] (%s - %s): ddps: %d, ldps: %d, sdp: %d/%d, fec: %s, conn: %p\n", 
+		seq_printf(m, "%sport %d - [%p] (%s - %s): ddps: %d, ldps: %d, sdp: %d/%d, fec: %s, conn: %p\n",
 			   prefix,
 			   port->port_num,
 			   port,
-- 
2.34.1

[Nouveau] [PATCH 2/3] drm/dp: Move DP declarations into separate header file

[Thomas Zimmermann]

Split the DP declarations from other helpers before moving the
DP functions into a separate module.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
 drivers/gpu/drm/drm_crtc_helper_internal.h | 27 ---------------------
 drivers/gpu/drm/drm_dp_aux_dev.c           |  2 +-
 drivers/gpu/drm/drm_dp_helper.c            |  2 +-
 drivers/gpu/drm/drm_dp_helper_internal.h   | 28 ++++++++++++++++++++++
 drivers/gpu/drm/drm_dp_mst_topology.c      |  2 +-
 drivers/gpu/drm/drm_kms_helper_common.c    |  1 +
 6 files changed, 32 insertions(+), 30 deletions(-)
 create mode 100644 drivers/gpu/drm/drm_dp_helper_internal.h

diff --git a/drivers/gpu/drm/drm_crtc_helper_internal.h b/drivers/gpu/drm/drm_crtc_helper_internal.h
index 61e09f8a8d0f..28e04e750130 100644
--- a/drivers/gpu/drm/drm_crtc_helper_internal.h
+++ b/drivers/gpu/drm/drm_crtc_helper_internal.h
@@ -28,36 +28,9 @@
 
 #include <drm/drm_connector.h>
 #include <drm/drm_crtc.h>
-#include <drm/drm_dp_helper.h>
 #include <drm/drm_encoder.h>
 #include <drm/drm_modes.h>
 
-/* drm_dp_aux_dev.c */
-#ifdef CONFIG_DRM_DP_AUX_CHARDEV
-int drm_dp_aux_dev_init(void);
-void drm_dp_aux_dev_exit(void);
-int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
-void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux);
-#else
-static inline int drm_dp_aux_dev_init(void)
-{
-	return 0;
-}
-
-static inline void drm_dp_aux_dev_exit(void)
-{
-}
-
-static inline int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
-{
-	return 0;
-}
-
-static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
-{
-}
-#endif
-
 /* drm_probe_helper.c */
 enum drm_mode_status drm_crtc_mode_valid(struct drm_crtc *crtc,
 					 const struct drm_display_mode *mode);
diff --git a/drivers/gpu/drm/drm_dp_aux_dev.c b/drivers/gpu/drm/drm_dp_aux_dev.c
index 06b374cae956..0618dfe16660 100644
--- a/drivers/gpu/drm/drm_dp_aux_dev.c
+++ b/drivers/gpu/drm/drm_dp_aux_dev.c
@@ -40,7 +40,7 @@
 #include <drm/drm_dp_mst_helper.h>
 #include <drm/drm_print.h>
 
-#include "drm_crtc_helper_internal.h"
+#include "drm_dp_helper_internal.h"
 
 struct drm_dp_aux_dev {
 	unsigned index;
diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 23f9073bc473..e995a0262ed7 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -35,7 +35,7 @@
 #include <drm/drm_dp_mst_helper.h>
 #include <drm/drm_panel.h>
 
-#include "drm_crtc_helper_internal.h"
+#include "drm_dp_helper_internal.h"
 
 struct dp_aux_backlight {
 	struct backlight_device *base;
diff --git a/drivers/gpu/drm/drm_dp_helper_internal.h b/drivers/gpu/drm/drm_dp_helper_internal.h
new file mode 100644
index 000000000000..5c9f8bb0c99a
--- /dev/null
+++ b/drivers/gpu/drm/drm_dp_helper_internal.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: MIT */
+
+#include <drm/drm_dp_helper.h>
+
+#ifdef CONFIG_DRM_DP_AUX_CHARDEV
+int drm_dp_aux_dev_init(void);
+void drm_dp_aux_dev_exit(void);
+int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
+void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux);
+#else
+static inline int drm_dp_aux_dev_init(void)
+{
+	return 0;
+}
+
+static inline void drm_dp_aux_dev_exit(void)
+{
+}
+
+static inline int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
+{
+	return 0;
+}
+
+static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
+{
+}
+#endif
diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 7f0ff96261cf..9f7b0b606924 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -45,7 +45,7 @@
 #include <drm/drm_print.h>
 #include <drm/drm_probe_helper.h>
 
-#include "drm_crtc_helper_internal.h"
+#include "drm_dp_helper_internal.h"
 #include "drm_dp_mst_topology_internal.h"
 
 /**
diff --git a/drivers/gpu/drm/drm_kms_helper_common.c b/drivers/gpu/drm/drm_kms_helper_common.c
index 47e92400548d..88260d26409c 100644
--- a/drivers/gpu/drm/drm_kms_helper_common.c
+++ b/drivers/gpu/drm/drm_kms_helper_common.c
@@ -29,6 +29,7 @@
 
 #include <drm/drm_print.h>
 
+#include "drm_dp_helper_internal.h"
 #include "drm_crtc_helper_internal.h"
 
 MODULE_AUTHOR("David Airlie, Jesse Barnes");
-- 
2.34.1

[Nouveau] [PATCH 3/3] drm/dp: Move DisplayPort helpers into separate helper module

[Thomas Zimmermann]

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
-- 
2.34.1

Re: [Nouveau] [Intel-gfx] [PATCH 2/3] drm/dp: Move DP declarations into separate header file

[Jani Nikula]

On Mon, 13 Dec 2021, Thomas Zimmermann <tzimmermann@suse.de> wrote:
> Split the DP declarations from other helpers before moving the
> DP functions into a separate module.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ---
>  drivers/gpu/drm/drm_crtc_helper_internal.h | 27 ---------------------
>  drivers/gpu/drm/drm_dp_aux_dev.c           |  2 +-
>  drivers/gpu/drm/drm_dp_helper.c            |  2 +-
>  drivers/gpu/drm/drm_dp_helper_internal.h   | 28 ++++++++++++++++++++++
>  drivers/gpu/drm/drm_dp_mst_topology.c      |  2 +-
>  drivers/gpu/drm/drm_kms_helper_common.c    |  1 +
>  6 files changed, 32 insertions(+), 30 deletions(-)
>  create mode 100644 drivers/gpu/drm/drm_dp_helper_internal.h
>
> diff --git a/drivers/gpu/drm/drm_crtc_helper_internal.h b/drivers/gpu/drm/drm_crtc_helper_internal.h
> index 61e09f8a8d0f..28e04e750130 100644
> --- a/drivers/gpu/drm/drm_crtc_helper_internal.h
> +++ b/drivers/gpu/drm/drm_crtc_helper_internal.h
> @@ -28,36 +28,9 @@
>  
>  #include <drm/drm_connector.h>
>  #include <drm/drm_crtc.h>
> -#include <drm/drm_dp_helper.h>
>  #include <drm/drm_encoder.h>
>  #include <drm/drm_modes.h>
>  
> -/* drm_dp_aux_dev.c */
> -#ifdef CONFIG_DRM_DP_AUX_CHARDEV
> -int drm_dp_aux_dev_init(void);
> -void drm_dp_aux_dev_exit(void);
> -int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
> -void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux);
> -#else
> -static inline int drm_dp_aux_dev_init(void)
> -{
> -	return 0;
> -}
> -
> -static inline void drm_dp_aux_dev_exit(void)
> -{
> -}
> -
> -static inline int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
> -{
> -	return 0;
> -}
> -
> -static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
> -{
> -}
> -#endif
> -
>  /* drm_probe_helper.c */
>  enum drm_mode_status drm_crtc_mode_valid(struct drm_crtc *crtc,
>  					 const struct drm_display_mode *mode);
> diff --git a/drivers/gpu/drm/drm_dp_aux_dev.c b/drivers/gpu/drm/drm_dp_aux_dev.c
> index 06b374cae956..0618dfe16660 100644
> --- a/drivers/gpu/drm/drm_dp_aux_dev.c
> +++ b/drivers/gpu/drm/drm_dp_aux_dev.c
> @@ -40,7 +40,7 @@
>  #include <drm/drm_dp_mst_helper.h>
>  #include <drm/drm_print.h>
>  
> -#include "drm_crtc_helper_internal.h"
> +#include "drm_dp_helper_internal.h"
>  
>  struct drm_dp_aux_dev {
>  	unsigned index;
> diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
> index 23f9073bc473..e995a0262ed7 100644
> --- a/drivers/gpu/drm/drm_dp_helper.c
> +++ b/drivers/gpu/drm/drm_dp_helper.c
> @@ -35,7 +35,7 @@
>  #include <drm/drm_dp_mst_helper.h>
>  #include <drm/drm_panel.h>
>  
> -#include "drm_crtc_helper_internal.h"
> +#include "drm_dp_helper_internal.h"
>  
>  struct dp_aux_backlight {
>  	struct backlight_device *base;
> diff --git a/drivers/gpu/drm/drm_dp_helper_internal.h b/drivers/gpu/drm/drm_dp_helper_internal.h
> new file mode 100644
> index 000000000000..5c9f8bb0c99a
> --- /dev/null
> +++ b/drivers/gpu/drm/drm_dp_helper_internal.h
> @@ -0,0 +1,28 @@
> +/* SPDX-License-Identifier: MIT */
> +
> +#include <drm/drm_dp_helper.h>

Please don't include other headers if you can avoid them by using
forward declarations.

BR,
Jani.


> +
> +#ifdef CONFIG_DRM_DP_AUX_CHARDEV
> +int drm_dp_aux_dev_init(void);
> +void drm_dp_aux_dev_exit(void);
> +int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
> +void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux);
> +#else
> +static inline int drm_dp_aux_dev_init(void)
> +{
> +	return 0;
> +}
> +
> +static inline void drm_dp_aux_dev_exit(void)
> +{
> +}
> +
> +static inline int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
> +{
> +	return 0;
> +}
> +
> +static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
> +{
> +}
> +#endif
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index 7f0ff96261cf..9f7b0b606924 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -45,7 +45,7 @@
>  #include <drm/drm_print.h>
>  #include <drm/drm_probe_helper.h>
>  
> -#include "drm_crtc_helper_internal.h"
> +#include "drm_dp_helper_internal.h"
>  #include "drm_dp_mst_topology_internal.h"
>  
>  /**
> diff --git a/drivers/gpu/drm/drm_kms_helper_common.c b/drivers/gpu/drm/drm_kms_helper_common.c
> index 47e92400548d..88260d26409c 100644
> --- a/drivers/gpu/drm/drm_kms_helper_common.c
> +++ b/drivers/gpu/drm/drm_kms_helper_common.c
> @@ -29,6 +29,7 @@
>  
>  #include <drm/drm_print.h>
>  
> +#include "drm_dp_helper_internal.h"
>  #include "drm_crtc_helper_internal.h"
>  
>  MODULE_AUTHOR("David Airlie, Jesse Barnes");

-- 
Jani Nikula, Intel Open Source Graphics Center

Re: [Nouveau] [PATCH 0/3] drm/dp: Move DisplayPort helpers into own module

[Jani Nikula]

On Mon, 13 Dec 2021, Thomas Zimmermann <tzimmermann@suse.de> wrote:
> Split-off DisplayPort functions from KMS helper library and move them
> into their own module. Reduces the size of drm_kms_helper.ko by ~50%.
>
> This patchset is part of an on-going effort to reduce the minimum
> binary size of the DRM core and helpers. It's helpful for systems with
> early-boot DRM graphics, which requires DRM to be linked into the
> kernel image.

Would it be time to add a subdirectory for each non-driver, non-core drm
module? We've touched this topic before. I find it increasingly hard to
remember which files are part of helpers. This would also help with the
arbitrary drm_dp_helper_mod.c naming.

Perhaps drivers/gpu/drm/drm_dp/?

BR,
Jani.



>
> Thomas Zimmermann (3):
>   drm/dp_mst: Remove trailing whitespace.
>   drm/dp: Move DP declarations into separate header file
>   drm/dp: Move DisplayPort helpers into separate helper module
>
>  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_crtc_helper_internal.h    | 27 ------------------
>  drivers/gpu/drm/{drm_dp_helper.c => drm_dp.c} |  2 +-
>  drivers/gpu/drm/drm_dp_aux_dev.c              |  2 +-
>  drivers/gpu/drm/drm_dp_helper_internal.h      | 28 +++++++++++++++++++
>  drivers/gpu/drm/drm_dp_helper_mod.c           | 22 +++++++++++++++
>  drivers/gpu/drm/drm_dp_mst_topology.c         |  4 +--
>  drivers/gpu/drm/drm_kms_helper_common.c       | 14 ----------
>  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 +
>  18 files changed, 83 insertions(+), 51 deletions(-)
>  rename drivers/gpu/drm/{drm_dp_helper.c => drm_dp.c} (99%)
>  create mode 100644 drivers/gpu/drm/drm_dp_helper_internal.h
>  create mode 100644 drivers/gpu/drm/drm_dp_helper_mod.c
>
>
> base-commit: 3f422828221d9ceefcddef0be33561b1646a1cbe
> prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d
> prerequisite-patch-id: c67e5d886a47b7d0266d81100837557fda34cb24
> --
> 2.34.1
>

-- 
Jani Nikula, Intel Open Source Graphics Center

Re: [Nouveau] [PATCH 0/3] drm/dp: Move DisplayPort helpers into own module

[Thomas Zimmermann]

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Hi

Am 13.12.21 um 14:34 schrieb Jani Nikula:
> On Mon, 13 Dec 2021, Thomas Zimmermann <tzimmermann@suse.de> wrote:
>> Split-off DisplayPort functions from KMS helper library and move them
>> into their own module. Reduces the size of drm_kms_helper.ko by ~50%.
>>
>> This patchset is part of an on-going effort to reduce the minimum
>> binary size of the DRM core and helpers. It's helpful for systems with
>> early-boot DRM graphics, which requires DRM to be linked into the
>> kernel image.
> 
> Would it be time to add a subdirectory for each non-driver, non-core drm
> module? We've touched this topic before. I find it increasingly hard to
> remember which files are part of helpers. This would also help with the
> arbitrary drm_dp_helper_mod.c naming.
> 
> Perhaps drivers/gpu/drm/drm_dp/?

It's probably worth it, but I'd prefer a separate patchset and 
discussion over this. It affects several modules.

If adding drm_dp_helper_mod.c is overkill, that module code can also be 
added to drm_dp.c for now.

Best regards
Thomas

> 
> BR,
> Jani.
> 
> 
> 
>>
>> Thomas Zimmermann (3):
>>    drm/dp_mst: Remove trailing whitespace.
>>    drm/dp: Move DP declarations into separate header file
>>    drm/dp: Move DisplayPort helpers into separate helper module
>>
>>   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_crtc_helper_internal.h    | 27 ------------------
>>   drivers/gpu/drm/{drm_dp_helper.c => drm_dp.c} |  2 +-
>>   drivers/gpu/drm/drm_dp_aux_dev.c              |  2 +-
>>   drivers/gpu/drm/drm_dp_helper_internal.h      | 28 +++++++++++++++++++
>>   drivers/gpu/drm/drm_dp_helper_mod.c           | 22 +++++++++++++++
>>   drivers/gpu/drm/drm_dp_mst_topology.c         |  4 +--
>>   drivers/gpu/drm/drm_kms_helper_common.c       | 14 ----------
>>   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 +
>>   18 files changed, 83 insertions(+), 51 deletions(-)
>>   rename drivers/gpu/drm/{drm_dp_helper.c => drm_dp.c} (99%)
>>   create mode 100644 drivers/gpu/drm/drm_dp_helper_internal.h
>>   create mode 100644 drivers/gpu/drm/drm_dp_helper_mod.c
>>
>>
>> base-commit: 3f422828221d9ceefcddef0be33561b1646a1cbe
>> prerequisite-patch-id: c2b2f08f0eccc9f5df0c0da49fa1d36267deb11d
>> prerequisite-patch-id: c67e5d886a47b7d0266d81100837557fda34cb24
>> --
>> 2.34.1
>>
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev

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Re: [Nouveau] [PATCH 0/3] drm/dp: Move DisplayPort helpers into own module

[Jani Nikula]

On Mon, 13 Dec 2021, Thomas Zimmermann <tzimmermann@suse.de> wrote:
> Hi
>
> Am 13.12.21 um 14:34 schrieb Jani Nikula:
>> On Mon, 13 Dec 2021, Thomas Zimmermann <tzimmermann@suse.de> wrote:
>>> Split-off DisplayPort functions from KMS helper library and move them
>>> into their own module. Reduces the size of drm_kms_helper.ko by ~50%.
>>>
>>> This patchset is part of an on-going effort to reduce the minimum
>>> binary size of the DRM core and helpers. It's helpful for systems with
>>> early-boot DRM graphics, which requires DRM to be linked into the
>>> kernel image.
>> 
>> Would it be time to add a subdirectory for each non-driver, non-core drm
>> module? We've touched this topic before. I find it increasingly hard to
>> remember which files are part of helpers. This would also help with the
>> arbitrary drm_dp_helper_mod.c naming.
>> 
>> Perhaps drivers/gpu/drm/drm_dp/?
>
> It's probably worth it, but I'd prefer a separate patchset and 
> discussion over this. It affects several modules.

I guess the only thing here that we need to get right from the start is
the new module name, everything else is relatively easy to change
later. drm_dp_helper.ko seems fine by me.

Note that this will also affect the drm_kms_helper.ko module parameters
dp_aux_i2c_speed_khz, dp_aux_i2c_transfer_size and
drm_dp_cec_unregister_delay, which will move to drm_dp_helper.ko.

See the monstrosity near the top of drm_kms_helper_common.c I had to add
for backward compatibility when I moved drm_edid_load.c from
drm_kms_helper.ko to drm.ko. That was perhaps different, as these seem
more like debug knobs, but at a minimum this needs to be mentioned in
the commit message, and certainly needs acks from Dave and/or Daniel.


BR,
Jani.



-- 
Jani Nikula, Intel Open Source Graphics Center