kernel/drivers/gpu/drm/rcar-du, branch linux-5.1.y

drm: rcar-du: lvds: Fix post-DLL divider calculation

2019-05-31T13:43:46Z

[ Upstream commit 167e535438ecc73d299340bb1269616432020dfb ] The PLL parameters are computed by looping over the range of acceptable M, N and E values, and selecting the combination that produces the output frequency closest to the target. The internal frequency constraints are taken into account by restricting the tested values for the PLL parameters, reducing the search space. The target frequency, however, is only taken into account when computing the post-PLL divider, which can result in a 0 value for the divider when the PLL output frequency being tested is lower than half of the target frequency. Subsequent loops will produce a better set of PLL parameters, but for some of the iterations this can result in a division by 0. Fix it by clamping the divider value. We could instead restrict the E values being tested in the inner loop, but that would require additional calculation that would likely be less efficient as the E parameter can only take three different values. Fixes: c25c01361199 ("drm: rcar-du: lvds: D3/E3 support") Signed-off-by: Laurent Pinchart Reviewed-by: Kieran Bingham Signed-off-by: Sasha Levin

drm: rcar-du: lvds: Set LVEN and LVRES bits together on D3

2019-05-31T13:43:45Z

[ Upstream commit 00d082cc4ea6e42ec4fed832a1020231bb1ca150 ] On the D3 SoC the LVDS PHY must be enabled in the same register write that enables the LVDS output. Skip writing the LVEN bit independently on that platform, it will be set by the write that sets LVRES. Signed-off-by: Laurent Pinchart Reviewed-by: Jacopo Mondi Signed-off-by: Sasha Levin

Merge drm/drm-next into drm-misc-next

2019-02-11T09:35:35Z

We need to backmerge drm-next to fix the komeda build failure. Signed-off-by: Maxime Ripard

drm: rcar-du: Turn LVDS clock output on/off for DPAD0 output on D3/E3

2019-02-08T00:25:56Z

On the D3 and E3 SoCs the LVDS PLL clock output provides the dot clock to the DU channels, even when the LVDS outputs are not in use. Enable and disable the LVDS clock output when enabling or disabling a CRTC connected to the DPAD0 output. Signed-off-by: Laurent Pinchart

drm: rcar-du: lvds: Add API to enable/disable clock output

2019-02-08T00:25:56Z

On the D3 and E3 platforms, the LVDS internal PLL supplies the pixel clock to the DU. This works automatically for LVDS outputs as the LVDS encoder is enabled through the bridge API, enabling the internal PLL and clock output. However, when using the DU DPAD output with the LVDS outputs turned off, the LVDS PLL needs to be controlled manually. Add an API to do so, to be called by the DU driver. The drivers/gpu/drm/rcar-du/ directory has to be treated as obj-y unconditionally, as the LVDS driver could be built-in while the DU driver is compiled as a module. Signed-off-by: Laurent Pinchart

drm: rcar-du: lvds: Don't fail probe if output is not connected on D3/E3

2019-02-08T00:25:56Z

On the D3 and E3 SoCs the LVDS encoder has an extended internal PLL and supplies a clock to the DU. That clock is used not only for the LVDS outputs but also for the DPAD output. The LVDS encoder thus needs to be available to the DU even when its output is disabled. Don't fail probe in that case on D3 and E3. Signed-off-by: Laurent Pinchart

drm: rcar-du: Simplify encoder registration

2019-02-08T00:25:55Z

Before the driver fully moved to drm_bridge and drm_panel, it was necessary to parse DT and locate encoder and connector nodes. The connector node is now unused and can be removed as a parameter to rcar_du_encoder_init(). As a consequence rcar_du_encoders_init_one() can be greatly simplified, removing most of the DT parsing. Signed-off-by: Laurent Pinchart

drm: rcar-du: lvds: Add r8a7744 support

2019-02-08T00:25:55Z

The LVDS encoders on RZ/G1N SoC is similar to RZ/G1M. Add support for RZ/G1N (R8A7744) SoC to the LVDS encoder driver. Signed-off-by: Biju Das Reviewed-by: Laurent Pinchart Signed-off-by: Laurent Pinchart Reviewed-by: Simon Horman

drm: rcar-du: add missing of_node_put

2019-02-08T00:25:55Z

Add an of_node_put when the result of of_graph_get_remote_port_parent is not available. Add a second of_node_put if no encoder is selected (encoder remains NULL). The semantic match that finds the first problem is as follows (http://coccinelle.lip6.fr): // @r exists@ local idexpression e; expression x; @@ e = of_graph_get_remote_port_parent(...); ... when != x = e when != true e == NULL when != of_node_put(e) when != of_fwnode_handle(e) ( return e; | *return ...; ) // Signed-off-by: Julia Lawall Reviewed-by: Laurent Pinchart Reviewed-by: Kieran Bingham Signed-off-by: Laurent Pinchart

drm/rcar-du: prepare for drmP.h removal from drm_modeset_helper.h

2019-02-07T20:48:19Z

The use of drmP.h is discouraged and removal of it from drm_modeset_helper.h caused rcar-du to fail to build. This patch introduce the necessary fixes to prepare for the drmP.h removal from drm_modeset_helper.h. Build tested on arm allmodconfig/allyesconfig. v2: - new patch. Changes like drm_probe_helper and other required several updates Signed-off-by: Sam Ravnborg Cc: Laurent Pinchart Cc: Kieran Bingham Cc: David Airlie Cc: Daniel Vetter Cc: linux-renesas-soc@vger.kernel.org Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20190126122527.11647-4-sam@ravnborg.org