kernel/drivers/video/fbdev/omap2/dss/dpi.c, branch linux-4.3.y

OMAPDSS: componentize omapdss

2015-06-17T10:44:53Z

omapdss kernel module contains drivers for multiple devices, one for each DSS submodule. The probing we have at the moment is a mess, and doesn't give us proper deferred probing nor ensure that all the devices are probed before omapfb/omapdrm start using omapdss. This patch solves the mess by using the component system for DSS submodules. The changes to all DSS submodules (dispc, dpi, dsi, hdmi4/5, rfbi, sdi, venc) are the same: probe & remove functions are changed to bind & unbind, and new probe & remove functions are added which call component_add/del. The dss_core driver (dss.c) acts as a component master. Adding and matching the components is simple: all dss device's child devices are added as components. However, we do have some dependencies between the drivers. The order in which they should be probed is reflected by the list in core.c (dss_output_drv_reg_funcs). The drivers are registered in that order, which causes the components to be added in that order, which makes the components to be bound in that order. This feels a bit fragile, and we probably should improve the code to manage binds in random order. However, for now, this works fine. Signed-off-by: Tomi Valkeinen Acked-by: Laurent Pinchart

OMAPDSS: remove uses of init/exit

2015-06-17T10:44:47Z

The following patches will add component handling to omapdss, improving the handling of deferred probing. However, at the moment we're using quite a lot of __inits and __exits in the driver, which prevent normal dynamic probing and removal. This patch removes most of the uses of __init and __exit, so that we can register drivers after module init, and so that we can unregister drivers even if the module is built-in. Signed-off-by: Tomi Valkeinen Acked-by: Laurent Pinchart

OMAPDSS: DPI: DRA7xx support

2015-02-04T10:32:07Z

Add support for DRA7xx DPI output. DRA7xx has three DPI outputs, each of which gets its input from a DISPC channel. However, DRA72x has only one video PLL, and DRA74x has two video PLLs. In both cases the video PLLs need to be shared between multiple outputs. The driver doesn't handle this at the moment. Also, DRA7xx requires configuring CONTROL module bits to route the clock from the PLL to the used DISPC channel. Signed-off-by: Tomi Valkeinen

Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2014-12-15T00:10:09Z

Pull driver core update from Greg KH: "Here's the set of driver core patches for 3.19-rc1. They are dominated by the removal of the .owner field in platform drivers. They touch a lot of files, but they are "simple" changes, just removing a line in a structure. Other than that, a few minor driver core and debugfs changes. There are some ath9k patches coming in through this tree that have been acked by the wireless maintainers as they relied on the debugfs changes. Everything has been in linux-next for a while" * tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits) Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries" fs: debugfs: add forward declaration for struct device type firmware class: Deletion of an unnecessary check before the function call "vunmap" firmware loader: fix hung task warning dump devcoredump: provide a one-way disable function device: Add dev__once variants ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries ath: use seq_file api for ath9k debugfs files debugfs: add helper function to create device related seq_file drivers/base: cacheinfo: remove noisy error boot message Revert "core: platform: add warning if driver has no owner" drivers: base: support cpu cache information interface to userspace via sysfs drivers: base: add cpu_device_create to support per-cpu devices topology: replace custom attribute macros with standard DEVICE_ATTR* cpumask: factor out show_cpumap into separate helper function driver core: Fix unbalanced device reference in drivers_probe driver core: fix race with userland in device_add() sysfs/kernfs: make read requests on pre-alloc files use the buffer. sysfs/kernfs: allow attributes to request write buffer be pre-allocated. fs: sysfs: return EGBIG on write if offset is larger than file size ...

OMAPDSS: DSI: use common DSS PLL support

2014-11-12T11:40:24Z

Now that we have the common DSS PLL support, change DSI to use it. This results in quite a lot of changes, but almost all of them are trivial name changes. The functions to calculate and program the PLL settings can be removed from dsi.c, as the common PLL API contains the same functionality. We also need to create struct dss_pll_hw entries for PLL hardware features for different OMAP platforms, instead of using the dss_features.c as the old code does. Signed-off-by: Tomi Valkeinen

OMAPDSS: DSI: dsi_runtime_get/put in pll_init

2014-11-12T11:40:23Z

When DPI uses the DSI PLL for pixel clock, the DPI code will call dsi_runtime_get/put to keep the DSI block enabled. A much simpler way to handle this is to do dsi_runtime_get/put in DSI's dsi_pll_init() and dsi_pll_uninit(), thus removing the need for DSI to call the runtime PM functions. Signed-off-by: Tomi Valkeinen

OMAPDSS: DSI: turn hsdivs fields to arrays

2014-11-12T11:40:22Z

We are creating a common DSS PLL code, so having fixed DSI specific hsdiv fields in the clock information is not ok. This patch changes the hsdiv fields to arrays, so that we can use all the 4 possible hsdiv outputs (DSI only usees 2), and we have generic way to access the hsdivs. Signed-off-by: Tomi Valkeinen

OMAPDSS: DSI: rename clkin4ddr to clkdco

2014-11-12T11:40:22Z

We are creating a common DSS PLL code, so rename 'clkin4ddr' field, which is DSI specific name, to 'clkdco' which is a generic name. Signed-off-by: Tomi Valkeinen

OMAPDSS: DSI: remove clkin from dsi_clock_info

2014-11-12T11:40:21Z

struct dsi_clock_info contains clkin field, which is the rate of the PLL's input clock. This field is not needed, as it can be easily retrieved by using the clk_get_rate(). This patch removes the clkin field. Signed-off-by: Tomi Valkeinen

OMAPDSS: DSI: always power on hsclk & hsdiv

2014-11-12T11:40:20Z

The DSS PLL has support to power on the PLL's highspeed clock output and HSDIV output separately. In practice both need to powered on, as in most OMAP's that's the only working configuration. We already do that in dsi_pll_init(), by overriding the passed arguments so that both are always powered. Simplify the code by removing the support for choosing which outputs to power on. Signed-off-by: Tomi Valkeinen