kernel/drivers/gpu/drm/sun4i/sun4i_tcon.h, branch linux-4.17.y

Backmerge tag 'v4.16-rc7' into drm-next

2018-03-28T04:30:41Z

Linux 4.16-rc7 This was requested by Daniel, and things were getting a bit hard to reconcile, most of the conflicts were trivial though.

drm/sun4i: Add support for A80 TCONs

2018-03-19T14:37:21Z

The Allwinner A80 SoC has 2 documented TCONs. The display pipeline diagram from the user manual shows a third TCON, but it's missing an interrupt line, and its registers are not explained either. It's also not used in Allwinner's vendor BSP. The first TCON only has channel 0, for LCD panel output. The TCON hardware setup is peculiar in that the eDP reset must also be deasserted to allow access to the TCON. How the eDP module is wired in the SoC itself is never explained. The second TCON only has channel 1, and its output is connected to the HDMI encoder block. This patch adds a "needs_edp_reset" field to the tcon quirks structure, and adds quirks and compatible strings for the 2 documented TCONs. Signed-off-by: Chen-Yu Tsai Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20180315114136.24747-4-wens@csie.org

drm/sun4i: tcon: Reduce the scope of the LVDS error a bit

2018-03-06T15:27:14Z

The current logic to deal with old DT missing the LVDS properties doesn't take into account whether the LVDS output is supported in the first place, resulting in spurious error messages on SoCs where it doesn't even matter. Introduce a new TCON flag to list if LVDS is supported at all to prevent this from happening. Reviewed-by: Chen-Yu Tsai Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20180221125703.4595-1-maxime.ripard@bootlin.com

drm/sun4i: Add has_channel_0 TCON quirk

2018-02-16T08:35:16Z

Some TCONs on newer SoCs doesn't support channel 0, since they are meant to be used only with TV or HDMI encoder. Prepare support for them with adding has_channel_0 quirk. Acked-by: Maxime Ripard Signed-off-by: Jernej Skrabec Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20180214200906.31509-8-jernej.skrabec@siol.net

drm/sun4i: Add LVDS support

2018-01-04T19:37:17Z

The TCON supports the LVDS interface to output to a panel or a bridge. Let's add support for it. Reviewed-by: Chen-Yu Tsai Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/7fbb85f33ee1d5009fde4f0d7d236e11ca58b114.1513854122.git-series.maxime.ripard@free-electrons.com

drm/sun4i: Create minimal multipliers and dividers

2018-01-04T19:08:42Z

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 Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/92ff5881c8f8674056d34458b2f264cd48d4e136.1513854122.git-series.maxime.ripard@free-electrons.com

drm/sun4i: use sun4i_tcon_of_table to check if a device node is a TCON

2017-11-30T15:46:05Z

The sun4i DRM driver maintains a list of compatible strings it uses to check if a device node within the display component graph is a TCON. The TCON driver also has this list, used to bind the TCON driver to the device. These two lists are identical. Instead of maintaining two identical lists, export the list from the TCON driver for the DRM driver to use. Suggested-by: Rob Herring Signed-off-by: Chen-Yu Tsai Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20171127084632.25511-1-wens@csie.org

drm/sun4i: tcon: Don't rely on encoders to set the TCON mode

2017-10-17T17:49:13Z

Just like we did for the TCON enable and disable, for historical reasons we used to rely on the encoders calling the TCON mode_set function, while the CRTC has a callback for that. Let's implement it in order to reduce the boilerplate code. Reviewed-by: Chen-Yu Tsai Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/faa3a4d511039af1d116270dfef3a8b60ca3591e.1508231063.git-series.maxime.ripard@free-electrons.com

drm/sun4i: tcon: Don't rely on encoders to enable the TCON

2017-10-17T17:49:13Z

So far, we've required all the TCON-connected encoders to call the TCON enable and disable functions. This was made this way because in the RGB/LVDS case, the TCON is the CRTC and the encoder. However, in all the other cases (HDMI, TV, DSI, etc.), we have another encoder down the road that needs to be programmed. We also needed to know which channel the encoder is connected to, which is encoder-specific. The CRTC's enable and disable callbacks can work just fine for our use case, and we can get the channel to use just by looking at the type of encoder, since that is fixed. Implement those callbacks, which will remove some of the encoder boilerplate. Reviewed-by: Chen-Yu Tsai Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/90b4396e19b3eca61b2ebfdae0672074b88ad74d.1508231063.git-series.maxime.ripard@free-electrons.com

drm/sun4i: tcon: Make tcon_set_mux mode argument const

2017-10-17T17:49:12Z

The drm_display_mode pointer can be mark const, so let's do it. Reviewed-by: Chen-Yu Tsai Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/b0cce5a43fc3b56953d21a54fc3c14672f755f42.1508231063.git-series.maxime.ripard@free-electrons.com