Thomas (added in the To: list) attempted to introduce some abbreviated states names but I do not know if this went through to the mainline and if it is applicable to pytimechart. Cf. [1] for the patch.
There is another patch for omap from santosh that adds description for each of the C states. https://patchwork.kernel.org/patch/549681/
+ omap3_power_states[OMAP3_STATE_C1].desc = "MPU ON + CORE ON"; Thanks for the link. Look like this is not what we are looking for. Those description are to be displayed inside the graph. They IMHO have to be less that 5 chars in order to be useable inside pytimechart.
+ .abbr = "C6", Looks more like what we need. Dont know if we are changing the stable tracepoints to display that instead of cpuidle index. ;-)
Pierre