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* Docs/EDID: Calculate CRC while building the codeChristoph Niedermaier2018-11-061-1/+0
| | | | | | | | | | | | | The previous version made it necessary to first generate an EDID data set without correct CRC and then to fix the CRC in a second step. This patch adds the CRC calculation to the makefile in such a way that a correct EDID data set is generated in a single build step. Successfully tested with all existing and a couple of new data sets. Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.de> Reviewed-by: Carsten Emde <C.Emde@osadl.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* Docs/EDID: Fixed erroneous bits of XOFFSET, XPULSE, YOFFSET and YPULSEChristoph Niedermaier2018-11-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | The problem was found when EDID data sets for displays other than the provided samples were generated. The patch has no effect on the provided samples that still match the data used in drivers/gpu/drm/drm_edid_load.c. The provided samples use small values for XOFFSET, XPULSE, YOFFSET and YPULSE, where the error doesn't occur. This fix corrects the use of that values in case of high values, because the most significant bits were treated incorrectly. So in edid.S msbs4 should use bit 8 and 9 of XOFFSET and XPULS. For YOFFSET and YPULSE msbs4 should use bit 4 and 5. lsbs2 was introduced for a better overview, without functional change. Removing also the useless value 63 of all files, because it is added in the *.S description files and then it is subtracted in edid.S. Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.de> Reviewed-by: Carsten Emde <C.Emde@osadl.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* drm: Add 800x600 (SVGA) screen resolution to the built-in EDIDsDaniel Thompson2014-05-261-0/+41
The 800x600 (SVGA) screen resolution was lacking in the set of built-in selectable EDID screen resolutions that can be used to repair misbehaving monitor firmware. This patch adds the related data set and expands the documentation. Note that the SVGA bit occupies a different byte to all the existing users of the established timing bits forcing a rework of the ESTABLISHED_TIMINGS_BITS macro. Tested new EDID on an aged (and misbehaving) industrial LCD panel; existing EDIDs still pass edid-decode's checksum checks. Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: David Airlie <airlied@linux.ie> Cc: Carsten Emde <C.Emde@osadl.org> Cc: linux-doc@vger.kernel.org Cc: dri-devel@lists.freedesktop.org Reviewed-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Dave Airlie <airlied@redhat.com>