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path: root/drivers/gpu/drm/omapdrm/dss/pll.c
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2020-11-10drm: omapdrm: Replace HTTP links with HTTPS onesAlexander A. Klimov1-1/+1
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov <[email protected]> Signed-off-by: Tomi Valkeinen <[email protected]> Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
2019-06-19treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234Thomas Gleixner1-12/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 503 file(s). Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Alexios Zavras <[email protected]> Reviewed-by: Allison Randal <[email protected]> Reviewed-by: Enrico Weigelt <[email protected]> Cc: [email protected] Link: https://lkml.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
2018-06-28drm/omap: Implement workaround for DRA7 errata ID:i932Venkateswara Rao Mandela1-10/+63
Description of DRA7 Errata i932: In rare circumstances DPLL_VIDEO1 and DPLL_VIDEO2 PLL's may not lock on the first attempt during DSS initialization. When this occurs, a subsequent attempt to relock the PLL will result in PLL successfully locking. This patch does the following as per the errata recommendation: - retries locking the PLL upto 20 times. - The time to wait for a PLL lock set to 1000 REFCLK cycles. We use usleep_range to wait for 1000 REFCLK cycles in the us range. This tight constraint is imposed as a lock later than 1000 REFCLK cycles may have high jitter. - Criteria for PLL lock is extended from check on just the PLL_LOCK bit to check on 6 PLL_STATUS bits. Silicon Versions Impacted: DRA71, DRA72, DRA74, DRA76 - All silicon revisions AM57x - All silicon revisions OMAP4/5 are not impacted by this errata Signed-off-by: Venkateswara Rao Mandela <[email protected]> [[email protected]: ported to v4.14] Signed-off-by: Tomi Valkeinen <[email protected]>
2018-03-01drm: omapdrm: dss: Store the registered plls array in struct dss_deviceLaurent Pinchart1-19/+21
As part of an effort to remove the usage of global variables in the driver, store the registered plls array in the dss_device structure instead of a global variable. Signed-off-by: Laurent Pinchart <[email protected]> Reviewed-by: Sebastian Reichel <[email protected]>
2018-03-01drm: omapdrm: Use unsigned int typeLaurent Pinchart1-2/+2
The kernel favours 'unsigned int' over plain 'unsigned'. Replace all occurences of the latter by the former. This avoid lots of checkpatch complaints in patches that touch lines where a plain 'unsigned' is used. Signed-off-by: Laurent Pinchart <[email protected]> Reviewed-by: Sebastian Reichel <[email protected]> Signed-off-by: Tomi Valkeinen <[email protected]>
2017-12-19drm: omapdrm: Remove filename from header and fix copyright tagAndrew F. Davis1-1/+1
Having the filename in the header serves little purpose and is often wrong after renames as it is here in several places, just drop it from all omapdrm files. While we are here unify the copyright tags to the TI recommended style. Signed-off-by: Andrew F. Davis <[email protected]>
2017-08-23drm/omap: fix i886 work-aroundTomi Valkeinen1-9/+20
7d267f068a8b4944d52e8b0ae4c8fcc1c1c5c5ba ("drm/omap: work-around for errata i886") changed how the PLL dividers and multipliers are calculated. While the new way should work fine for all the PLLs, it breaks omap5 PLLs. The issues seen are rather odd: seemed that the output clock rate is half of what we asked. It is unclear what's causing there issues. As a work-around this patch adds a "errata_i886" flag, which is set only for DRA7's PLLs, and the PLL setup is done according to that flag. Signed-off-by: Tomi Valkeinen <[email protected]> Tested-by: H. Nikolaus Schaller <[email protected]>
2017-04-03drm/omap: work-around for errata i886Tomi Valkeinen1-8/+9
DRA7 errata i886 (FPDLink PLL Unlocks With Certain SoC PLL M/N Values) says that FPDLink is sensitive to jitter on the vout clock, and that low PLL M and N values result in more jitter than high M and N values. This patch implements a workaround for the problem by changing the PLL setup to search for clocks starting from high M and N values, instead of low values. This should not cause any functional change, and only reduces the jitter. Signed-off-by: Tomi Valkeinen <[email protected]> Reviewed-by: Laurent Pinchart <[email protected]>
2016-06-07Merge omapdss header refactoringTomi Valkeinen1-2/+1
Merge omapdss public header refactoring, which separates the public header into omapdrm and omapfb parts.
2016-06-03drm/omap: Do not include video/omapdss.h directly in driversPeter Ujfalusi1-2/+1
All drivers to include the omapdrm/dss/omapdss.h header file. This header includes the <video/omapdss.h> Signed-off-by: Peter Ujfalusi <[email protected]>
2016-05-19drm/omap: add comments for PLL calculationsTomi Valkeinen1-0/+7
Add comments showing how the PLL clock rates are calculated. Signed-off-by: Tomi Valkeinen <[email protected]>
2016-05-19drm/omap: generalize dss_pll_calc_b()Tomi Valkeinen1-7/+10
dss_pll_calc_b() takes HDMI TMDS clock rate as a parameter. To make dss_pll_calc_b() usable for non-HDMI users, change the function to take clkout rate as parameter, and also change the current users of dss_pll_calc_b() to accommodate that. Signed-off-by: Tomi Valkeinen <[email protected]>
2016-05-19drm/omap: move HDMI PLL calc function to pll.cTomi Valkeinen1-0/+59
Move hdmi_pll_compute(), used to calculate the config for HDMI PLL, from hdmi_pll.c to pll.c, with the name of dss_pll_calc_b(), to make it available to non-HDMI users. Signed-off-by: Tomi Valkeinen <[email protected]>
2016-05-19drm/omap: rename PLL calc functionsTomi Valkeinen1-2/+2
Add a "_a" postfix to the type A PLL calc functions, to differentiate them from the type B PLL calculations which we will add shortly. Signed-off-by: Tomi Valkeinen <[email protected]>
2016-05-19drm/omap: add PLL helper funcsTomi Valkeinen1-0/+53
Add two PLL helper functions: dss_pll_find_by_src() which returns the dss_pll for the given dss_clk_source. dss_pll_get_clkout_idx_for_src() which returns the clkout index for the given dss_clk_source. Signed-off-by: Tomi Valkeinen <[email protected]>
2015-12-29drm/omap: move omapdss & displays under omapdrmTomi Valkeinen1-0/+389
Now that omapfb has its own copy of omapdss and display drivers, we can move omapdss and display drivers which omapdrm uses to omapdrm's directory. We also need to change the main drm Makefile so that omapdrm directory is always entered, because omapdss has a file that can't be built as a module. Signed-off-by: Tomi Valkeinen <[email protected]> Acked-by: Dave Airlie <[email protected]> Acked-by: Rob Clark <[email protected]>
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