Samsung MIPI DSIM controller is common DSI IP that can be used in various
SoCs like Exynos, i.MX8M Mini/Nano.
In order to access this DSI controller between various platform SoCs,
the ideal way to incorporate this in the drm stack is via the drm bridge
driver.
This patch is trying to differentiate platform-specific and bridge driver
code by maintaining exynos platform glue code in exynos_drm_dsi.c driver
and common bridge driver code in samsung-dsim.c providing that the new
platform-specific glue should be supported in the bridge driver, unlike
exynos platform drm drivers.
- Add samsung_dsim_plat_data for keeping platform-specific attributes like
host_ops, irq_ops, and hw_type.
- Initialize the plat_data hooks for exynos platform in exynos_drm_dsi.c.
- samsung_dsim_probe is the common probe call across exynos_drm_dsi.c and
samsung-dsim.c.
- plat_data hooks like host_ops and irq_ops are invoked during the
respective bridge call chains.
v8:
* update the commit message head
v7:
* fix the drm bridge attach chain for exynos drm dsi driver
* fix the hw_type checking logic
v6:
* handle previous bridge pointer for exynos dsi
v5:
* [mszyprow] reworked driver initialization using the same approach as in
drivers/gpu/drm/{exynos/exynos_dp.c, bridge/analogix/analogix_dp_core.c},
removed weak functions, moved exynos_dsi_driver back to exynos_drm_dsi.c
and restored integration with exynos_drm custom initialization.
* updated the commit message [Jagan]
v4:
* include Inki Dae in MAINTAINERS
* remove dsi_driver probe in exynos_drm_drv to support multi-arch build
v3:
* restore gpio related fixes
* restore proper bridge chain
* rework initialization issue
* fix header includes in proper way
v2:
* fixed exynos dsi driver conversion (Marek Szyprowski)
* updated commit message
* updated MAINTAINERS file
v1:
* don't maintain component_ops in bridge driver
* don't maintain platform glue code in bridge driver
* add platform-specific glue code and make a common bridge
Signed-off-by: Marek Szyprowski
Signed-off-by: Jagan Teki
---
MAINTAINERS |9 +
drivers/gpu/drm/bridge/Kconfig | 12 +
drivers/gpu/drm/bridge/Makefile |1 +
drivers/gpu/drm/bridge/samsung-dsim.c | 1703 ++
drivers/gpu/drm/exynos/Kconfig |1 +
drivers/gpu/drm/exynos/exynos_drm_dsi.c | 1766 ++-
include/drm/bridge/samsung-dsim.h | 113 ++
7 files changed, 1952 insertions(+), 1653 deletions(-)
create mode 100644 drivers/gpu/drm/bridge/samsung-dsim.c
create mode 100644 include/drm/bridge/samsung-dsim.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 9ae989b32ebb..ba7a6721443c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -6624,6 +6624,15 @@ T: git git://anongit.freedesktop.org/drm/drm-misc
F: Documentation/devicetree/bindings/display/panel/samsung,lms397kf04.yaml
F: drivers/gpu/drm/panel/panel-samsung-db7430.c
+DRM DRIVER FOR SAMSUNG MIPI DSIM BRIDGE
+M: Jagan Teki
+M: Marek Szyprowski
+M: Inki Dae
S: Maintained
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 57946d80b02d..8e85dac9f53e 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -231,6 +231,18 @@ config DRM_PARADE_PS8640
The PS8640 is a high-performance and low-power
MIPI DSI to eDP converter
+config DRM_SAMSUNG_DSIM
+ tristate "Samsung MIPI DSIM bridge driver"
+ depends on COMMON_CLK
+ depends on OF && HAS_IOMEM
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select DRM_PANEL_BRIDGE
+ help
+ The Samsung MIPI DSIM bridge controller driver.
+ This MIPI DSIM bridge can be found it on Exynos SoCs and
+ NXP's i.MX8M Mini/Nano.
+
config DRM_SIL_SII8620
tristate "Silicon Image SII8620 HDMI/MHL bridge"
depends on OF
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index 1884803c6860..dae843723991 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -15,6 +15,7 @@ obj-$(CONFIG_DRM_MEGACHIPS_STDP_GE_B850V3_FW) +=
megachips-stdp-ge-b850v
obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o
+obj-$(CONFIG_DRM_SAMSUNG_DSIM) += samsung-dsim.o
obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o
obj-$(CONFIG_DRM_SII902X) += sii902x.o
obj-$(CONFIG_DRM_SII9234) += sii9234.o
diff --git a/drivers/gpu/drm/bridge/samsung-dsim.c
b/drivers/gpu/drm/bridge/samsung-dsim.c
new file mode 100644
index ..b63e0479e71d
--- /dev/null
+++ b/drivers/gpu/drm/bridge/samsung-dsim.c
@@ -0,0 +1,1703 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Samsung MIPI DSIM bridge driver.
+ *
+ * Copyright (C) 2021 Amarula Solutions(India)
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd
+ * Author: Jagan Teki
+ *
+ * Based on
