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v2: Fix commit msg to reflect why issue occurs(Jani) Set GCP_COLOR_INDICATION only when we set 10/12 bit deep color. Changing settings from 10/12 bit deep color to 8 bit(& vice versa) doesn't work correctly using xrandr max bpc property. When we connect a monitor which supports deep color, the highest deep color setting is selected; which sets GCP_COLOR_INDICATION. When we change the setting to 8 bit color, we still set GCP_COLOR_INDICATION which doesn't allow the switch back to 8 bit color. v3,4: Add comments & drop changes in intel_hdmi_compute_config(Ville) Since HSW+, GCP_COLOR_INDICATION is not required for 8bpc. Drop the changes in intel_hdmi_compute_config as desired_bpp is needed to change values for pipe_bpp based on bw_constrained flag. v5: Fix missing logical && in condition for setting GCP_COLOR_INDICATION. v6: Fix comment formatting (Ville) v7: Add reviewed by Ville v8: Set GCP_COLOR_INDICATION based on spec: For Gen 7.5 or later platforms, indicate color depth only for deep color modes. Bspec: 8135,7751,50524 Pre DDI platforms, indicate color depth if deep color is supported by sink. Bspec: 7854 Exception: CHERRYVIEW behaves like Pre DDI platforms. Bspec: 15975 Check pipe_bpp is less than bpp * 3 in hdmi_deep_color_possible, to not set 12 bit deep color for every modeset. This fixes the issue where 12 bit color was selected even when user selected 10 bit.(Ville) v9: Maintain a consistent behavior for all platforms and support GCP_COLOR_INDICATION only when we are in deep color mode. Remove hdmi_sink_is_deep_color() - no longer needed as checking pipe_bpp > 24 takes care of the deep color mode scenario. Separate patch for fixing switch from 12 bit to 10 bit deep color mode. Co-developed-by: Aditya Swarup <aditya.swarup@intel.com> Signed-off-by: Clinton Taylor <Clinton.A.Taylor@intel.com> Signed-off-by: Aditya Swarup <aditya.swarup@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Jani Nikula <jani.nikula@intel.com> Cc: Manasi Navare <manasi.d.navare@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190429230811.9983-1-aditya.swarup@intel.com
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.