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The GOP sometimes initializes the pclk at a (slightly) different frequency then the pclk which we've calculated. This commit makes the DSI code read-back the pclk set by the GOP and if that is within a reasonable margin of the calculated pclk, uses that instead. This fixes the first modeset being a full modeset instead of a fast modeset on systems where the GOP pclk is different. Changes in v2: -Use intel_encoder_current_mode() to get the pclk setup by the GOP Changes in v3: -Back to the readback approach, skipping the dsi_pll.ctrl / .dev checks in intel_pipe_config_compare() when adjust is set leads to: [drm:pipe_config_err [i915]] *ERROR* mismatch in dsi_pll.ctrl (...) [drm:pipe_config_err [i915]] *ERROR* mismatch in dsi_pll.div (...) -Do the readback and pclk overriding from vlv_dsi_init(), rather then from intel_dsi_vbt_init() as the vbt code should not be touching the hw Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190605181735.7020-3-hdegoede@redhat.com |
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| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.