On Thu, Feb 17, 2022 at 01:25:23AM +0100, Marek Vasut wrote: > The chip contains fractional PLL, however the driver currently hard-codes > one specific PLL setting. Implement generic PLL parameter calculation code, > so any DPI panel with arbitrary pixel clock can be attached to this bridge. > > The datasheet for this bridge is not available, the PLL behavior has been > inferred from [1] and [2] and by analyzing the DPI pixel clock with scope. > The PLL limits might be wrong, but at least the calculated values match all > the example code available. This is better than one hard-coded pixel clock > value anyway. > > [1] > https://github.com/rockchip-linux/kernel/blob/develop-4.19/drivers/gpu/drm/bridge/icn6211.c > [2] https://github.com/tdjastrzebski/ICN6211-Configurator > > Signed-off-by: Marek Vasut <ma...@denx.de> > Cc: Jagan Teki <ja...@amarulasolutions.com> > Cc: Maxime Ripard <max...@cerno.tech> > Cc: Robert Foss <robert.f...@linaro.org> > Cc: Sam Ravnborg <s...@ravnborg.org> > Cc: Thomas Zimmermann <tzimmerm...@suse.de> > To: dri-devel@lists.freedesktop.org
Acked-by: Maxime Ripard <max...@cerno.tech> Maxime
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