On Mon, 02 Dec 2019, Adrian Ratiu <adrian.ratiu@xxxxxxxxxxxxx>
wrote:
Having a generic Synopsis DesignWare MIPI-DSI host controller
bridge driver is a very good idea, however the current
implementation has hardcoded quite a lot of the register layouts
used by the two supported SoC vendors, STM and Rockchip, which
use IP cores v1.30 and v1.31.
This makes it hard to support other SoC vendors like the FSL/NXP
i.MX 6 which use older v1.01 cores or future versions because,
based on history, layout changes should also be expected in new
DSI versions / SoCs.
This patch series converts the bridge and platform drivers to
access registers via generic regmap APIs and allows each
platform driver to configure its register layout via struct
reg_fields, then adds support for the host controller found on
i.MX 6.
I only have i.MX hardware with MIPI-DSI panel and relevant
documentation available for testing so I'll really appreciate it
if someone could test the series on Rockchip and
STM... eyeballing register fields could only get me so far, so
sorry in advance for any breakage!
Many thanks to Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
for suggesting the regmap solution and to Liu Ying
<Ying.Liu@xxxxxxxxxxxxx> for doing the initial i.MX platform
driver implementation.
This series applies on top of latest linux-next tree,
next-20191202.
v3 -> v4:
* Added commmit message to dt-binding patch (Neil) * Converted
the dt-binding to yaml dt-schema format (Neil) * Small DT node
+ driver fixes (Rob) * Renamed platform driver to reflect it's
only for i.MX v6 (Fabio) * Added small panel example to the
host controller DT binding
v2 -> v3:
* Added const declarations to dw-mipi-dsi.c structs (Emil) *
Fixed Reviewed-by tags and cc'd some more relevant ML (Emil)
v1 -> v2:
* Moved register definitions & regmap initialization into
bridge module. Platform drivers get the regmap via plat_data
after calling the bridge probe (Emil).
I've been told I forgot to explicitly CC some of the maintainers,
sorry about that! Added a few more persons to CC.
Adrian Ratiu (4):
drm: bridge: dw_mipi_dsi: access registers via a regmap
drm: bridge: dw_mipi_dsi: abstract register access using reg_fields
drm: imx: Add i.MX 6 MIPI DSI host driver
dt-bindings: display: add i.MX6 MIPI DSI host controller doc
.../display/imx/fsl,mipi-dsi-imx6.yaml | 136 ++++
drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 699 +++++++++++++-----
drivers/gpu/drm/imx/Kconfig | 7 +
drivers/gpu/drm/imx/Makefile | 1 +
drivers/gpu/drm/imx/dw_mipi_dsi-imx6.c | 378 ++++++++++
.../gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 17 +-
drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 34 +-
include/drm/bridge/dw_mipi_dsi.h | 2 +-
8 files changed, 1067 insertions(+), 207 deletions(-)
create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,mipi-dsi-imx6.yaml
create mode 100644 drivers/gpu/drm/imx/dw_mipi_dsi-imx6.c
--
2.24.0
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