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2018-01-04drm/sun4i: Create minimal multipliers and dividersMaxime Ripard3-3/+11
The various outputs the TCON can provide have different constraints on the dotclock divider. Let's make them configurable by the various mode_set functions. Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Link: https://patchwork.freedesktop.org/patch/msgid/92ff5881c8f8674056d34458b2f264cd48d4e136.1513854122.git-series.maxime.ripard@free-electrons.com
2018-01-04drm/sun4i: Force the mixer rate at 150MHzMaxime Ripard2-0/+13
It seems like the mixer can only run properly when clocked at 150MHz. In order to have something more robust than simply a fire-and-forget assigned-clocks-rate, let's put that in the code. Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Link: https://patchwork.freedesktop.org/patch/msgid/f5f05307972ed05250e8094b302d68b9e7e167f6.1513854122.git-series.maxime.ripard@free-electrons.com
2018-01-04dt-bindings: display: sun4i-drm: Add A83T pipelineMaxime Ripard1-0/+3
The A83T has two video pipelines in parallel that looks quite similar to the other SoCs. The video planes are handled through a controller called the mixer, and the video signal is then passed to the timing controller (TCON). And while there is two instances of the mixers and TCONs, they have a significant number of differences. The TCONs are quite easy to deal with, one is supposed to generate TV (in the broader term, so including things like HDMI) signals, the other one LCD (so RGB, LVDS, DSI) signals. And while they are called TCON0 and TCON1 in the A83t datasheet, newer SoCs call them TCON-TV and TCON-LCD, which seems more appropriate. However, the mixers differ mostly by their capabilities, with some features being available only in the first one, or the number of planes they expose, but also through their register layout. And while the capabilities could be represented as properties, the register layout differences would need to express all the registers offsets as properties, which is usually quite bad. Especially since documentation on that hardware block is close to non-existent and we don't even have the list of all those registers in the first place. So let's call them mixer 0 and 1 in our compatibles, even though the name is pretty bad... At the moment, we only have tested the code on a board that has a single display output, so we're leaving the tcon-tv and mixer1 out. Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Link: https://patchwork.freedesktop.org/patch/msgid/2702a5c1d224af1c51743492ad1b917966f2ad43.1513854122.git-series.maxime.ripard@free-electrons.com
2018-01-04dt-bindings: display: sun4i-drm: Add LVDS propertiesMaxime Ripard1-0/+8
Some clocks and resets supposed to drive the LVDS logic in the display engine have been overlooked when the driver was first introduced. Add those additional resources to the binding, and we'll deal with the ABI stability in the code. Reviewed-by: Chen-Yu Tsai <wens@csie.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Link: https://patchwork.freedesktop.org/patch/msgid/ddbde28fe2e4f21412974e4c69fbfe1c5ff9383f.1513854122.git-series.maxime.ripard@free-electrons.com
2018-01-03drm/tinydrm: add driver for ST7735R panelsDavid Lechner4-0/+232
This adds a new driver for Sitronix ST7735R display panels. This has been tested using an Adafruit 1.8" TFT. Signed-off-by: David Lechner <david@lechnology.com> Reviewed-by: Noralf Trønnes <noralf@tronnes.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Link: https://patchwork.freedesktop.org/patch/msgid/1514833336-22564-4-git-send-email-david@lechnology.com