A new step of 480MHz has been added on SKUs that have a RPL-U device id. This particular step is to better support 120Hz panels. This patchset adds a new table to include this new CDCLK step. Details can be found in BSpec entry 55409. In addition to identifying RPL-U device id, we need to make a distinction between ES and QS parts as this change comes only to QS parts. For this CPUID Brand string is used. 480Mhz step is only supported in SKUs which does not contain the string "Genuine Intel" in the Brand string. Even though ES parts will be deprecated in future we are adding this distinction since they are currently in use. However, here the question arises if we keep this change in upstream or not as this could just be dead code down the line. Feedbacks are appreciated on this. Chaitanya Kumar Borah (2): drm/i915: Add RPL-U CDCLK table drm/i915: Add additional check for 480Mhz step CDCLK drivers/gpu/drm/i915/display/intel_cdclk.c | 53 ++++++++++++++++++++++ 1 file changed, 53 insertions(+) -- 2.25.1
