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path: root/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c
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2019-05-16drm/sun4i: sun6i_mipi_dsi: Fix hsync_porch overflowJagan Teki
Loop N1 instruction delay for burst mode devices are computed based on horizontal sync and porch timing values. The current driver is using u16 type for computing this hsync_porch value, which would failed to fit within the u16 type for large sync and porch timings devices. This would result in hsync_porch overflow and eventually computed wrong instruction delay value. Example, timings, where it produces the overflow { .hdisplay = 1080, .hsync_start = 1080 + 408, .hsync_end = 1080 + 408 + 4, .htotal = 1080 + 408 + 4 + 38, } It reproduces the desired delay value 65487 but the correct working value should be 7. So, Fix it by computing hsync_porch value separately with u32 type. Fixes: 1c1a7aa3663c ("drm/sun4i: dsi: Add burst support") Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190512184128.13720-2-jagan@amarulasolutions.com
2019-02-19drm/sun4i: dsi: Add burst supportKonstantin Sudakov
The current driver doesn't support the DSI burst operation mode. Let's add the needed quirks to make it work. Signed-off-by: Konstantin Sudakov <k.sudakov@integrasources.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/1dcabf2b38d3f0d3387b1cf02575e3d14e3ecd4e.1549896081.git-series.maxime.ripard@bootlin.com
2019-02-19drm/sun4i: dsi: Rework a bit the hblk calculationMaxime Ripard
It turns out that the hblk calculation actually follows a similar pattern than the other packets. Rework a bit the calculation and add a comment. Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/d79a21b09847579ce907212a59737af21a729dd0.1549896081.git-series.maxime.ripard@bootlin.com
2019-02-19drm/sun4i: dsi: Fix front vs back porch calculationMaxime Ripard
Since I always confuse the back and front porches, a few miscalculation slipped through. Fix them. Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/90c2375b8a853cae0dcc135cedb47edbc26168d8.1549896081.git-series.maxime.ripard@bootlin.com
2019-02-19drm/sun4i: dsi: Enforce boundaries on the start delayMaxime Ripard
The Allwinner BSP makes sure that we don't end up with a null start delay or with a delay larger than vtotal. The former condition is likely to happen now with the reworked start delay, so make sure we enforce the same boundaries. Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/c9889cf5f7a3d101ef380905900b45a182596f56.1549896081.git-series.maxime.ripard@bootlin.com
2019-02-19drm/sun4i: dsi: Change the start delay calculationMaxime Ripard
The current calculation for the video start delay in the current DSI driver is that it is the total vertical size, minus the front porch and sync length, plus 1. This equals to the active vertical size plus the back porch plus 1. That 1 is coming in the Allwinner BSP from an variable that is set to 1. However, if we look at the Allwinner BSP more closely, and especially in the "legacy" code for the display (in drivers/video/sunxi/legacy/), we can see that this variable is actually computed from the porches and the sync minus 10, clamped between 8 and 100. This fixes the start delay symptom we've seen on some panels (vblank timeouts with vertical white stripes at the bottom of the panel). Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/6e5f72e68f47ca0223877464bf12f0c3f3978de8.1549896081.git-series.maxime.ripard@bootlin.com
2019-02-08drm/sun4i: dsi: Fix unitialized variable warningMaxime Ripard
Since the DPHY rework, one error path doesn't set the return error code before jumping to its error label, which in turns make gcc (rightfully) complain about the variable holding the error code being uninitialized. Fix this. Fixes: bb3b6fcb6849 ("sun6i: dsi: Convert to generic phy handling") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190208090540.19626-1-maxime.ripard@bootlin.com
2019-02-07sun6i: dsi: Convert to generic phy handlingMaxime Ripard
Now that we have everything in place in the PHY framework to deal in a generic way with MIPI D-PHY phys, let's convert our PHY driver and its associated DSI driver to that new API. Reviewed-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/dc6450e2978b6dafcc464595ad06204d22d2658f.1548085432.git-series.maxime.ripard@bootlin.com
2019-01-24drm: Split out drm_probe_helper.hDaniel Vetter
Having the probe helper stuff (which pretty much everyone needs) in the drm_crtc_helper.h file (which atomic drivers should never need) is confusing. Split them out. To make sure I actually achieved the goal here I went through all drivers. And indeed, all atomic drivers are now free of drm_crtc_helper.h includes. v2: Make it compile. There was so much compile fail on arm drivers that I figured I'll better not include any of the acks on v1. v3: Massive rebase because i915 has lost a lot of drmP.h includes, but not all: Through drm_crtc_helper.h > drm_modeset_helper.h -> drmP.h there was still one, which this patch largely removes. Which means rolling out lots more includes all over. This will also conflict with ongoing drmP.h cleanup by others I expect. v3: Rebase on top of atomic bochs. v4: Review from Laurent for bridge/rcar/omap/shmob/core bits: - (re)move some of the added includes, use the better include files in other places (all suggested from Laurent adopted unchanged). - sort alphabetically v5: Actually try to sort them, and while at it, sort all the ones I touch. v6: Rebase onto i915 changes. v7: Rebase once more. Acked-by: Harry Wentland <harry.wentland@amd.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Acked-by: Benjamin Gaignard <benjamin.gaignard@linaro.org> Acked-by: Jani Nikula <jani.nikula@intel.com> Acked-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com> Acked-by: CK Hu <ck.hu@mediatek.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Liviu Dudau <liviu.dudau@arm.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Cc: linux-arm-kernel@lists.infradead.org Cc: virtualization@lists.linux-foundation.org Cc: etnaviv@lists.freedesktop.org Cc: linux-samsung-soc@vger.kernel.org Cc: intel-gfx@lists.freedesktop.org Cc: linux-mediatek@lists.infradead.org Cc: linux-amlogic@lists.infradead.org Cc: linux-arm-msm@vger.kernel.org Cc: freedreno@lists.freedesktop.org Cc: nouveau@lists.freedesktop.org Cc: spice-devel@lists.freedesktop.org Cc: amd-gfx@lists.freedesktop.org Cc: linux-renesas-soc@vger.kernel.org Cc: linux-rockchip@lists.infradead.org Cc: linux-stm32@st-md-mailman.stormreply.com Cc: linux-tegra@vger.kernel.org Cc: xen-devel@lists.xen.org Link: https://patchwork.freedesktop.org/patch/msgid/20190117210334.13234-1-daniel.vetter@ffwll.ch
2018-07-13drm: drop _mode_ from drm_mode_connector_attach_encoderDaniel Vetter
Again to align with the usual prefix of just drm_connector_. Again done with sed + manual fixup for indent issues. Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180709084016.23750-7-daniel.vetter@ffwll.ch
2018-07-10drm/panel: Make of_drm_find_panel() return an ERR_PTR() instead of NULLBoris Brezillon
Right now, the DRM panel logic returns NULL when a panel pointing to the passed OF node is not present in the list of registered panels. Most drivers interpret this NULL value as -EPROBE_DEFER, but we are about to modify the semantic of of_drm_find_panel() and let the framework return -ENODEV when the device node we're pointing to has a status property that is not equal to "okay" or "ok". Let's first patch the of_drm_find_panel() implementation to return ERR_PTR(-EPROBE_DEFER) instead of NULL and patch all callers to replace the '!panel' check by an 'IS_ERR(panel)' one. Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180509130042.9435-2-boris.brezillon@bootlin.com
2018-07-04drm/sun4i: Remove VLA usageKees Cook
In the quest to remove all stack VLA usage from the kernel[1], this switches to using a kmalloc allocation and moves all the size calculations to the start to do an allocation. If an upper bounds on the mode timing calculations could be determined, a fixed stack size could be used instead. [1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180629184740.GA37415@beast
2018-05-28drm/sun4i: mark PM functions as __maybe_unusedArnd Bergmann
Disabling CONFIG_PM produces a compile time warning when these functions are not referenced: drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c:1072:12: error: 'sun6i_dsi_runtime_suspend' defined but not used [-Werror=unused-function] static int sun6i_dsi_runtime_suspend(struct device *dev) ^~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c:1043:12: error: 'sun6i_dsi_runtime_resume' defined but not used [-Werror=unused-function] static int sun6i_dsi_runtime_resume(struct device *dev) ^~~~~~~~~~~~~~~~~~~~~~~~ Fixes: 133add5b5ad4 ("drm/sun4i: Add Allwinner A31 MIPI-DSI controller support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180525155030.3667352-1-arnd@arndb.de
2018-04-11drm/sun4i: Add Allwinner A31 MIPI-DSI controller supportMaxime Ripard
Most of the Allwinner SoCs since the A31 share the same MIPI-DSI controller. While that controller is mostly undocumented, the code is out there and has been cleaned up in order to be integrated into DRM. However, there's still some dark areas that are a bit unclear about how the block exactly operates. Reviewed-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com> Link: https://patchwork.freedesktop.org/patch/msgid/ad9e6224fced87c0889ddd2765d1942610061f72.1522835818.git-series.maxime.ripard@bootlin.com