summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/drm_mipi_dsi.c
Commit message (Collapse)AuthorAgeFilesLines
* drm/dsi: add helpers for DSI compression mode and PPS packetsJani Nikula2019-11-071-0/+51
| | | | | | | | | | | | | | | Add helper functions for sending the DSI compression mode and picture parameter set data type packets. For the time being, limit the support to using VESA DSC 1.1 and the default PPS. This may need updating if the need arises for proprietary compression or non-default PPS, however keep it simple for starters. v2: Add missing EXPORT_SYMBOL Cc: Vandita Kulkarni <vandita.kulkarni@intel.com> Reviewed-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191028150047.22048-5-jani.nikula@intel.com
* drm/dsi: add missing DSI data typesJani Nikula2019-11-071-0/+2
| | | | | | | | | | | Add execute queue and compressed pixel stream packet data types for completeness. Cc: Vandita Kulkarni <vandita.kulkarni@intel.com> Reviewed-by: Vandita Kulkarni <vandita.kulkarni@intel.com> Reviewed-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191028150047.22048-2-jani.nikula@intel.com
* drm/dsi: clean up DSI data type definitionsJani Nikula2019-11-071-2/+2
| | | | | | | | | | | | | Rename picture parameter set (it's a long packet, not a long write) and compression mode (it's not a DCS command) enumerations according to the DSI specification. Order the types according to the spec. Use tabs instead of spaces for indentation. Use all lower case for hex. Cc: Vandita Kulkarni <vandita.kulkarni@intel.com> Reviewed-by: Vandita Kulkarni <vandita.kulkarni@intel.com> Reviewed-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20191028150047.22048-1-jani.nikula@intel.com
* drivers: Introduce device lookup variants by of_nodeSuzuki K Poulose2019-07-301-6/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce wrappers for {bus/driver/class}_find_device() to locate devices by its of_node. Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Maxime Ripard <maxime.ripard@bootlin.com> Cc: dri-devel@lists.freedesktop.org Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: devicetree@vger.kernel.org Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Frank Rowand <frowand.list@gmail.com> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: linux-i2c@vger.kernel.org Cc: linux-rockchip@lists.infradead.org Cc: linux-spi@vger.kernel.org Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: Takashi Iwai <tiwai@suse.com> Cc: Alan Tull <atull@kernel.org> Cc: linux-fpga@vger.kernel.org Cc: Peter Rosin <peda@axentia.se> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Heiner Kallweit <hkallweit1@gmail.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Liam Girdwood <lgirdwood@gmail.com> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Thor Thayer <thor.thayer@linux.intel.com> Cc: Jiri Slaby <jslaby@suse.com> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Peter Rosin <peda@axentia.se> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-by: Wolfram Sang <wsa@the-dreams.de> # I2C part Acked-by: Moritz Fischer <mdf@kernel.org> # For FPGA part Acked-by: Mark Brown <broonie@kernel.org> Link: https://lore.kernel.org/r/20190723221838.12024-3-suzuki.poulose@arm.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* bus_find_device: Unify the match callback with class_find_deviceSuzuki K Poulose2019-06-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There is an arbitrary difference between the prototypes of bus_find_device() and class_find_device() preventing their callers from passing the same pair of data and match() arguments to both of them, which is the const qualifier used in the prototype of class_find_device(). If that qualifier is also used in the bus_find_device() prototype, it will be possible to pass the same match() callback function to both bus_find_device() and class_find_device(), which will allow some optimizations to be made in order to avoid code duplication going forward. Also with that, constify the "data" parameter as it is passed as a const to the match function. For this reason, change the prototype of bus_find_device() to match the prototype of class_find_device() and adjust its callers to use the const qualifier in accordance with the new prototype of it. Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andrew Lunn <andrew@lunn.ch> Cc: Andreas Noever <andreas.noever@gmail.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: Corey Minyard <minyard@acm.org> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: David Kershner <david.kershner@unisys.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: David Airlie <airlied@linux.ie> Cc: Felipe Balbi <balbi@kernel.org> Cc: Frank Rowand <frowand.list@gmail.com> Cc: Grygorii Strashko <grygorii.strashko@ti.com> Cc: Harald Freudenberger <freude@linux.ibm.com> Cc: Hartmut Knaack <knaack.h@gmx.de> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Jason Gunthorpe <jgg@ziepe.ca> Cc: Jonathan Cameron <jic23@kernel.org> Cc: "James E.J. Bottomley" <jejb@linux.ibm.com> Cc: Len Brown <lenb@kernel.org> Cc: Mark Brown <broonie@kernel.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michael Jamet <michael.jamet@intel.com> Cc: "Martin K. Petersen" <martin.petersen@oracle.com> Cc: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Sebastian Ott <sebott@linux.ibm.com> Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: Yehezkel Bernat <YehezkelShB@gmail.com> Cc: rafael@kernel.org Acked-by: Corey Minyard <minyard@acm.org> Acked-by: David Kershner <david.kershner@unisys.com> Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Acked-by: Wolfram Sang <wsa@the-dreams.de> # for the I2C parts Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* drm: Add support for pps and compression mode command packetvkorjani2018-07-251-0/+2
| | | | | | | | | | | | | | | | | | | | | | | After enabling DSC we need to send compression mode command packet and pps data packet, for which 2 new data types are added 07h Compression Mode Data Type Write , short write, 2 parameters 0Ah PPS Long Write (word count determines number of bytes) This patch adds support to send these packets. Cc: David Airlie <airlied@linux.ie> Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org Cc: linux-fbdev@vger.kernel.org Changes in v3: - None Signed-off-by: vkorjani <vikas.korjani@intel.com> [seanpaul removed pps_write_buffer fn, added types to packet_format helpers] Signed-off-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Rob Clark <robdclark@gmail.com>
* drm/dsi: Fix improper use of mipi_dsi_device_transfer() return valuePhilippe Cornu2018-01-161-3/+6
| | | | | | | | | | | | | | | The function mipi_dsi_device_transfer() returns the number of transmitted or received bytes on success or a negative error code on failure. The functions mipi_dsi_shutdown_peripheral(), mipi_dsi_turn_on_peripheral() & mipi_dsi_set_maximum_return_packet_size() use improperly this returned value in case of success: 0 should be returned instead of the number of transmitted bytes. Signed-off-by: Philippe Cornu <philippe.cornu@st.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20180112144847.18810-1-philippe.cornu@st.com
* drm: Convert to using %pOF instead of full_nameRob Herring2017-07-261-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we have a custom printf format specifier, convert users of full_name to use %pOF instead. This is preparation to remove storing of the full path string for each node. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Russell King <linux@armlinux.org.uk> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Sean Paul <seanpaul@chromium.org> Cc: Inki Dae <inki.dae@samsung.com> Cc: Joonyoung Shim <jy0922.shim@samsung.com> Cc: Seung-Woo Kim <sw0312.kim@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Javier Martinez Canillas <javier@osg.samsung.com> Cc: Xinliang Liu <z.liuxinliang@hisilicon.com> Cc: Rongrong Zou <zourongrong@gmail.com> Cc: Xinwei Kong <kong.kongxinwei@hisilicon.com> Cc: Chen Feng <puck.chen@hisilicon.com> Cc: CK Hu <ck.hu@mediatek.com> Cc: Philipp Zabel <p.zabel@pengutronix.de> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Neil Armstrong <narmstrong@baylibre.com> Cc: Carlo Caione <carlo@caione.org> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Mark Yao <mark.yao@rock-chips.com> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Chen-Yu Tsai <wens@csie.org> Cc: Jyri Sarha <jsarha@ti.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: dri-devel@lists.freedesktop.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-samsung-soc@vger.kernel.org Cc: linux-mediatek@lists.infradead.org Cc: linux-amlogic@lists.infradead.org Cc: linux-renesas-soc@vger.kernel.org Cc: linux-rockchip@lists.infradead.org Partially-Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> [seanpaul changed subject prefix and fixed conflict in stm/ltdc.c] Signed-off-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
* drm/dsi: Implement DCS set/get display brightnessVinay Simha BN2016-08-241-0/+49
| | | | | | | | | | | | | | | Provide a small convenience wrapper that set/get the display brightness. Cc: John Stultz <john.stultz@linaro.org> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Archit Taneja <archit.taneja@gmail.com> Cc: Rob Clark <robdclark@gmail.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Emil Velikov <emil.l.velikov@gmail.com> Signed-off-by: Vinay Simha BN <simhavcs@gmail.com> Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Order DCS helpers by command codeThierry Reding2016-08-241-17/+17
| | | | | | | Most of these helpers had been introduced in the correct order, but some were simply appended, which wasn't detected when they were applied. Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Make set_tear_scanline command consistentThierry Reding2016-07-121-8/+8
| | | | | | | | | Use a consistent name for the function that implements set_tear_scanline and reword and reformat the kerneldoc slightly. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20160613133327.7630-1-thierry.reding@gmail.com
* drm/dsi: Add uevent callbackThierry Reding2016-06-131-0/+16
| | | | | | | | | Implement a uevent callback for devices on the MIPI DSI bus. This callback will append MODALIAS information to the uevent and allow modules to be loaded when devices are added to the bus. Reviewed-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Implement set tear scanlineVinay Simha BN2016-06-071-0/+22
| | | | | | | | | | | | | | | | | | | | | | | | | Provide a small convenience wrapper that transmits a set_tear_scanline command. v2: * helper function suggested by Thierry for set_tear_scanline * Also includes small build fixes from Sumit Semwal. v3: one scanline parameter suggested by jani v4: passing the payload properly as suggested by jani Cc: Archit Taneja <archit.taneja@gmail.com> Cc: John Stultz <john.stultz@linaro.org> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Jani Nikula <jani.nikula@linux.intel.com> Signed-off-by: Vinay Simha BN <simhavcs@gmail.com> Reviewed-by: Sumit Semwal <sumit.semwal@linaro.org> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1465285532-12676-1-git-send-email-simhavcs@gmail.com
* drm/dsi: Get DSI host by DT device nodeArchit Taneja2016-03-021-0/+39
| | | | | | | | | | | | | | | | | MIPI DSI devices are inherently aware of their host because they share a parent-child hierarchy in the device tree. Non-DSI drivers that create DSI device don't have this data. In order to get this information, they require to a phandle to the DSI host in the device tree. Maintain a list of all the DSI hosts that are currently registered. This list will be used to find the struct mipi_dsi_host corresponding to the device tree node passed to of_find_mipi_dsi_host_by_node(). Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Add routine to unregister a DSI deviceArchit Taneja2016-03-021-1/+11
| | | | | | | | | | | | | A driver calling mipi_dsi_device_register_full() might want to remove the device once it's done. It might also require it in an error handling path in case something went wrong. Create mipi_dsi_device_unregister() for this purpose and use it within mipi_dsi_remove_device_fn() as it does the same thing. Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Try to match non-DT DSI devicesArchit Taneja2016-03-021-1/+17
| | | | | | | | | | | | | | | | | Add a device name field in struct mipi_dsi_device. This name is not the same as the device name (which is of the format "hostname.reg"). When the device is created via DT, this name is set to the modalias string. In the non-DT case, the driver creating the DSI device provides the name by populating a field in struct mipi_dsi_device_info. Matching for DT case would be as it was before. For the non-DT case, we compare the device and driver names. Other buses (like I2C/SPI) perform a non-DT match by comparing the device name and entries in the driver's id_table. Such a mechanism isn't used for the DSI bus. Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Use mipi_dsi_device_register_full() for DSI device creationArchit Taneja2016-03-021-17/+47
| | | | | | | | | | | | | | | Use mipi_dsi_device_register_full() for device creation. This takes in a struct mipi_dsi_device_info as a template to populate the DSI device information. The reason to introduce this is to have a way to create DSI devices not available via DT. Drivers that want to create a DSI device can populate a struct mipi_dsi_device_info and call this function. For DSI devices available via DT, of_mipi_dsi_device_add() is used as before, but this now calls mipi_dsi_device_register_full() internally. Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Check for CONFIG_OF when defining of_mipi_dsi_device_add()Archit Taneja2016-03-021-0/+8
| | | | | | | | | | | | of_mipi_dsi_device_add() is used only when CONFIG_OF is enabled. It currently works if OF support is disabled, but this will change when we add more functionality to it. Define the original function if CONFIG_OF is enabled and a dummy function otherwise. Signed-off-by: Archit Taneja <architt@codeaurora.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Add Turn On/Shutdown Peripheral command helpersWerner Johansson2015-11-241-0/+38
| | | | | | | | | The MIPI_DSI_TURN_ON_PERIPHERAL and MIPI_DSI_SHUTDOWN_PERIPHERAL packets are required for some panels, for example the Panasonic VVX10F034N00. Signed-off-by: Werner Johansson <werner.johansson@sonymobile.com> Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/mipi-dsi: Avoid potential NULL pointer dereferenceThierry Reding2015-01-281-3/+3
| | | | | | | | | The mipi_dsi_packet_create() function dereferences the msg pointer before checking that it's valid. Move the dereference down to where it is required to avoid potentially dereferencing a NULL pointer. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Do not require .owner field to be setThierry Reding2014-11-131-3/+7
| | | | | | | Drivers now no longer need to set the .owner field. It will be automatically set at registration time. Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Resolve MIPI DSI device from phandleThierry Reding2014-11-131-0/+23
| | | | | | | | | Add a function, of_find_mipi_dsi_device_by_node(), that can be used to resolve a phandle to a MIPI DSI device. Acked-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Implement DCS set_{column,page}_address commandsThierry Reding2014-11-131-0/+48
| | | | | | | | Provide small convenience wrappers to set the column and page extents of the frame memory accessed by the host processors. Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Implement DCS {get,set}_pixel_format commandsThierry Reding2014-11-131-0/+46
| | | | | | | | Provide small convenience wrappers to query or set the pixel format used by the interface. Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Implement DCS get_power_mode commandThierry Reding2014-11-131-0/+25
| | | | | | | | | Provide a small convenience wrapper that transmits a DCS get_power_mode command. A set of bitmasks for the mode bits is also provided. Acked-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Implement DCS soft_reset commandThierry Reding2014-11-131-0/+18
| | | | | | | | Provide a small convenience wrapper that transmits a DCS soft_reset command. Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Implement DCS nop commandThierry Reding2014-11-131-0/+18
| | | | | | | Provide a small convenience wrapper that transmits a DCS nop command. Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Add to DocBook documentationThierry Reding2014-11-131-2/+16
| | | | | | | | | | Integrate the MIPI DSI helpers into DocBook and clean up various kerneldoc warnings. Also add a brief DOC section and clarify some aspects of the mipi_dsi_host struct's .transfer() operation. Acked-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Implement some standard DCS commandsYoungJun Cho2014-11-131-0/+118
| | | | | | | | | | Add helpers for the {enter,exit}_sleep_mode, set_display_{on,off} and set_tear_{on,off} DCS commands. Signed-off-by: YoungJun Cho <yj44.cho@samsung.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> [treding: kerneldoc and other minor cleanup] Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Implement generic read and write commandsThierry Reding2014-11-131-0/+89
| | | | | | | | | Implement generic read and write commands. Selection of the proper data type for packets is done automatically based on the number of parameters or payload length. Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Add mipi_dsi_set_maximum_return_packet_size() helperYoungJun Cho2014-11-131-0/+24
| | | | | | | | | | This function can be used to set the maximum return packet size for a MIPI DSI peripheral. Signed-off-by: YoungJun Cho <yj44.cho@samsung.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> [treding: endianess, kerneldoc, return value] Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Make mipi_dsi_dcs_{read,write}() symmetricalThierry Reding2014-11-131-12/+65
| | | | | | | | | | | | | | | Currently the mipi_dsi_dcs_write() function requires the DCS command byte to be embedded within the write buffer whereas mipi_dsi_dcs_read() has a separate parameter. Make them more symmetrical by adding an extra command parameter to mipi_dsi_dcs_write(). The S6E8AA0 driver relies on the old asymmetric API and there's concern that moving to the new API may be less efficient. Provide a new function with the old semantics for those cases and make the S6E8AA0 driver use it instead. Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Add DSI transfer helperThierry Reding2014-11-131-16/+16
| | | | | | | | | | A common pattern is starting to emerge for higher level transfer helpers. Create a new helper that encapsulates this pattern and avoids code duplication. Acked-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Add message to packet translatorThierry Reding2014-11-131-0/+53
| | | | | | | | | | | | This commit introduces a new function, mipi_dsi_create_packet(), which converts from a MIPI DSI message to a MIPI DSI packet. The MIPI DSI packet is as close to the protocol described in the DSI specification as possible and useful in drivers that need to write a DSI packet into a FIFO to send a message off to the peripheral. Suggested-by: Andrzej Hajda <a.hajda@samsung.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Introduce packet format helpersThierry Reding2014-11-131-0/+67
| | | | | | | Add two helpers, mipi_dsi_packet_format_is_{short,long}(), that help in determining the format of a packet. Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/mipi-dsi: consider low power transmissionInki Dae2014-09-201-0/+6
| | | | | | | | | | | | | | | | | | This patch adds a new flag, MIPI_DSI-MODE_LPM, to transmit data in low power. With this flag, msg.flags has MIPI_DSI_MSG_USE_LPM so that host driver of each SoC can clear or set relevant register bit for low power transmission. All host drivers shall support continuous clock behavior on the Clock Lane, and optionally may support non-continuous clock behavior. Both of them can transmit data in high speed of low power. With each clock behavior, non-continuous or continuous clock mode, host controller will transmit data in high speed by default so if peripheral wants to receive data in low power, the peripheral driver should set MIPI_DSI_MODE_LPM flag. Signed-off-by: Inki Dae <inki.dae@samsung.com>
* drm/dsi: Use peripheral's channel for DCS commandsThierry Reding2014-07-221-8/+6
| | | | | | | | | When executing DCS commands, use the channel associated with the DSI peripheral rather than one explicitly specified in the function call. Devices shouldn't be able to step on each others' toes like this. Acked-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Make mipi_dsi_dcs_write() return ssize_tThierry Reding2014-07-221-2/+2
| | | | | | | | This function returns the value of the struct mipi_dsi_host_ops' .transfer() so make sure the return types are consistent. Acked-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/dsi: Support device shutdownThierry Reding2014-06-051-0/+10
| | | | | | | Hook up the MIPI DSI bus's .shutdown() function to allow drivers to implement code that should be run when a device is shut down. Signed-off-by: Thierry Reding <treding@nvidia.com>
* drm/mipi_dsi: create dsi devices only for nodes with reg propertyAndrzej Hajda2014-04-041-1/+5
| | | | | | | | MIPI DSI host node can contain child nodes which are not DSI devices. Checking for existence of reg property can be used to distinguish such nodes. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
* drm: Add MIPI DSI bus supportAndrzej Hajda2013-12-171-0/+315
MIPI DSI bus allows to model DSI hosts and DSI peripherals using the Linux driver model. DSI hosts are registered by the DSI host drivers. During registration DSI peripherals will be created from the children of the DSI host's device tree node. Support for registration from board-setup code will be added later when needed. DSI hosts expose operations which can be used by DSI peripheral drivers to access associated devices. Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 22:31:08 +0000