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2021-10-06drm/bridge: dw-hdmi-cec: Make use of the helper function devm_add_action_or_reset()Cai Huoqing1-4/+2
The helper function devm_add_action_or_reset() will internally call devm_add_action(), and if devm_add_action() fails then it will execute the action mentioned and return the error code. So use devm_add_action_or_reset() instead of devm_add_action() to simplify the error handling, reduce the code. Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210922125909.215-1-caihuoqing@baidu.com
2021-10-01drm/bridge: ti-sn65dsi86: Implement bridge->mode_valid()Rob Clark1-12/+13
For the brave new world of bridges not creating their own connectors, we need to implement the max clock limitation via bridge->mode_valid() instead of connector->mode_valid(). v2: Drop unneeded connector->mode_valid() Signed-off-by: Rob Clark <robdclark@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210920225801.227211-3-robdclark@gmail.com
2021-09-23drm/bridge: parade-ps8640: Add support for AUX channelPhilip Chen1-1/+179
Implement the first version of AUX support, which will be useful as we expand the driver to support varied use cases. Signed-off-by: Philip Chen <philipchen@chromium.org> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> [dianders: whitespace fixes reported by dim apply-branch] Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210921110556.v6.2.I1d6ea362dc76efa77cca2b46253d31b7651eaf17@changeid
2021-09-23drm/bridge: parade-ps8640: Use regmap APIsPhilip Chen1-30/+64
Replace the direct i2c access (i2c_smbus_* functions) with regmap APIs, which will simplify the future update on ps8640 driver. Signed-off-by: Philip Chen <philipchen@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Acked-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> [dianders: whitespace fixes reported by dim apply-branch] Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210921110556.v6.1.I2351df94f18d5d8debc22d4d100f36fac560409a@changeid
2021-09-22drm/bridge: Move devm_drm_of_get_bridge to bridge/panel.cMaxime Ripard1-0/+37
By depending on devm_drm_panel_bridge_add(), devm_drm_of_get_bridge() introduces a circular dependency between the modules drm (where devm_drm_of_get_bridge() ends up) and drm_kms_helper (where devm_drm_panel_bridge_add() is). Fix this by moving devm_drm_of_get_bridge() to bridge/panel.c and thus drm_kms_helper. Fixes: 87ea95808d53 ("drm/bridge: Add a function to abstract away panels") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Tested-by: Heiko Stuebner <heiko@sntech.de> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/20210917180925.2602266-1-maxime@cerno.tech
2021-09-20drm: bridge: it66121: Fix return value it66121_probeAlex Bee1-2/+14
Currently it66121_probe returns -EPROBE_DEFER if the there is no remote endpoint found in the device tree which doesn't seem helpful, since this is not going to change later and it is never checked if the next bridge has been initialized yet. It will fail in that case later while doing drm_bridge_attach for the next bridge in it66121_bridge_attach. Since the bindings documentation for it66121 bridge driver states there has to be a remote endpoint defined, its safe to return -EINVAL in that case. This additonally adds a check, if the remote endpoint is enabled and returns -EPROBE_DEFER, if the remote bridge hasn't been initialized (yet). Fixes: 988156dc2fc9 ("drm: bridge: add it66121 driver") Signed-off-by: Alex Bee <knaerzche@gmail.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210918140420.231346-1-knaerzche@gmail.com
2021-08-31drm: adv7511: Convert to SPDX identifierCai Huoqing1-14/+1
use SPDX-License-Identifier instead of a verbose license text Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210822072111.628-1-caihuoqing@baidu.com
2021-08-31drm/bridge: cdns: Make use of the helper function devm_platform_ioremap_resource()Cai Huoqing1-3/+1
Use the devm_platform_ioremap_resource() helper instead of calling platform_get_resource() and devm_ioremap_resource() separately Signed-off-by: Cai Huoqing <caihuoqing@baidu.com> Reviewed-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210831135048.4305-1-caihuoqing@baidu.com
2021-08-31drm/bridge: it66121: Wait for next bridge to be probedPaul Cercueil1-0/+3
If run before the next bridge is initialized, of_drm_find_bridge() will give us a NULL pointer. If that's the case, return -EPROBE_DEFER; we may have more luck next time. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Fixes: 988156dc2fc9 ("drm: bridge: add it66121 driver") Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210827163956.27517-2-paul@crapouillou.net
2021-08-31drm/bridge: it66121: Initialize {device,vendor}_idsPaul Cercueil1-1/+1
These two arrays are populated with data read from the I2C device through regmap_read(), and the data is then compared with hardcoded vendor/product ID values of supported chips. However, the return value of regmap_read() was never checked. This is fine, as long as the two arrays are zero-initialized, so that we don't compare the vendor/product IDs against whatever garbage is left on the stack. Address this issue by zero-initializing these two arrays. Signed-off-by: Paul Cercueil <paul@crapouillou.net> Fixes: 988156dc2fc9 ("drm: bridge: add it66121 driver") Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210827163956.27517-1-paul@crapouillou.net
2021-08-31drm/bridge: anx7625: enable DSI EOTPXin Ji1-1/+0
Enable DSI EOTP feature for fixing some panel screen constant shift issue. Removing MIPI flag MIPI_DSI_MODE_NO_EOT_PACKET to enable DSI EOTP. Reviewed-by: Robert Foss <robert.foss@linaro.org> Signed-off-by: Xin Ji <xji@analogixsemi.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210819060110.3427256-1-xji@analogixsemi.com
2021-08-26drm/bridge: parade-ps8640: Reorg the macrosPhilip Chen1-8/+10
Reorg the macros as follows: (1) Group the registers on the same page together. (2) Group the register and its bit operation together while indenting the macros of the bit operation with one space. Also fix a misnomer for the number of mipi data lanes. Signed-off-by: Philip Chen <philipchen@chromium.org> Acked-by: Sam Ravnborg <sam@ravnborg.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210824181140.v2.1.I8ead7431357409f2526e5739ec5bc3ddfd242243@changeid
2021-08-18drm/bridge: anx7625: Propagate errors from sp_tx_edid_read()Robert Foss1-4/+10
During the sp_tx_edid_read() call the return value of sp_tx_edid_read() is ignored, which could cause potential errors to go unhandled. All errors which are returned by sp_tx_edid_read() are handled in anx7625_get_edid(). Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210818171318.1848272-2-robert.foss@linaro.org
2021-08-18drm/bridge: anx7625: Propagate errors from sp_tx_rst_aux()Robert Foss1-4/+8
The return value of sp_tx_rst_aux() is not propagated, which means both compiler warnings and potential errors not being handled. Fixes: 8bdfc5dae4e3 ("drm/bridge: anx7625: Add anx7625 MIPI DSI/DPI to DP") Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210818171318.1848272-1-robert.foss@linaro.org
2021-08-12drm/bridge: ti-sn65dsi86: Avoid creating multiple connectorsRob Clark1-0/+3
If we created our own connector because the driver does not support the NO_CONNECTOR flag, we don't want the downstream bridge to *also* create a connector. And if this driver did pass the NO_CONNECTOR flag (and we supported that mode) this would change nothing. Fixes: 4e5763f03e10 ("drm/bridge: ti-sn65dsi86: Wrap panel with panel-bridge") Reported-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Rob Clark <robdclark@chromium.org> Tested-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Douglas Anderson <dianders@chromium.org> Tested-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210811235253.924867-2-robdclark@gmail.com
2021-08-06drm/bridge: anx7625: Tune K value for IVO panelXin Ji2-4/+24
IVO panel require less input video clock variation than video clock variation in DP CTS spec. This patch decreases the K value of ANX7625 which will shrink eDP Tx video clock variation to meet IVO panel's requirement. Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Xin Ji <xji@analogixsemi.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210806104407.2208538-1-xji@analogixsemi.com
2021-08-06drm: bridge: it66121: Check drm_bridge_attach retvalRobert Foss1-0/+2
The return value of drm_bridge_attach() is ignored during the it66121_bridge_attach() call, which is incorrect. Fixes: 988156dc2fc9 ("drm: bridge: add it66121 driver") Signed-off-by: Robert Foss <robert.foss@linaro.org> Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210805185039.402178-1-robert.foss@linaro.org Link: https://patchwork.freedesktop.org/patch/msgid/20210805185039.402178-1-robert.foss@linaro.org
2021-07-31drm/bridge: ti-sn65dsi86: Add some 100 us delaysDouglas Anderson1-0/+6
The manual has always said that we need 100 us delays in a few places. Though it hasn't seemed to be a big deal to skip these, let's add them in case it makes something happier. NOTE: this fixes no known issues but it seems good to make it right. Fixes: a095f15c00e2 ("drm/bridge: add support for sn65dsi86 bridge driver") Signed-off-by: Douglas Anderson <dianders@chromium.org> Acked-by: Robert Foss <robert.foss@linaro.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210730084534.v2.3.I842d483139531aa4651da8338512fdf0171ff23c@changeid
2021-07-31drm/bridge: ti-sn65dsi86: Fix power off sequenceDouglas Anderson1-4/+7
When testing with a panel that's apparently a little more persnickety about the correct power sequence (specifically Samsung ATNA33XC20), we found that the ti-sn65dsi86 was doing things just slightly wrong. Looking closely at the ti-sn65dsi86's datasheet, the power off sequence is supposed to be: 1. Clear VSTREAM_ENABLE bit 2. Stop DSI stream from GPU. DSI lanes must be placed in LP11 state. 3. Program the ML_TX_MODE to 0x0 (OFF) 4. Program the DP_NUM_LANES register to 0x0 5. Clear the DP_PLL_EN bit. 6. Deassert the EN pin. 7. Remove power from supply pins Since we were doing the whole sequence in the "disable", I believe that step #2 (stopping the DSI stream from the GPU) wasn't happening. We also weren't setting DP_NUM_LANES to 0. Let's fix this. NOTE: things are a little asymmetric now. For instance, we turn the PLL on in "enable" but now we're not turning it off until "post_disable". It would seem to make sense to move the PLL turning on to "pre_enable" to match. Unfortunately, I don't believe that's allowed. It looks as if (in the non-refclk mode which probably nobody is using) we have to wait until the MIPI clock is there before we can enable the PLL. In any case, the way it is here won't really hurt--it'll just leave the PLL on a little longer. Fixes: a095f15c00e2 ("drm/bridge: add support for sn65dsi86 bridge driver") Signed-off-by: Douglas Anderson <dianders@chromium.org> Acked-by: Robert Foss <robert.foss@linaro.org> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210730084534.v2.2.If8a8ec3bf1855cf0dbb62c005a71d6698c99c125@changeid
2021-07-30Merge tag 'drm-misc-next-2021-07-29' of git://anongit.freedesktop.org/drm/drm-misc into drm-nextDave Airlie7-22/+50
drm-misc-next for v5.15: UAPI Changes: - Add modifiers for arm fixed rate compression. Cross-subsystem Changes: - Assorted dt binding fixes. - Convert ssd1307fb to json-schema. - Update a lot of irc channels to point to OFTC, as everyone moved there. - Fix the same divide by zero for asilantfb, kyro, rivafb. Core Changes: - Document requirements for new atomic properties. - Add drm_gem_fb_(begin/end)_cpu_access helpers, and use them in some drivers. - Document drm_property_enum.value for bitfields. - Add explicit _NO_ for MIPI_DSI flags that disable features. - Assorted documentation fixes. - Update fb_damage handling, and move drm_plane_enable_fb_damage_clips to core. - Add logging and docs to RMFB ioctl. - Assorted small fixes to dp_mst, master handling. - Clarify drm lease usage. Driver Changes: - Assorted small fixes to panfrost, hibmc, bridge/nwl-dsi, rockchip, vc4. - More drm -> linux irq conversions. - Add support for some Logic Technologies and Multi-Inno panels. - Expose phy-functionality for drm/rockchip, to allow controlling from the media subsystem. - Add support for 2 AUO panels. - Add damage handling to ssd1307fb. - Improve FIFO handling on mxsfb. - Assorted small fixes to vmwgfx, and bump version to 2.19 for the new ioctls. - Improve sony acx424akp backlight handling. Signed-off-by: Dave Airlie <airlied@redhat.com> From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/a753221a-e23e-0dc4-7ca6-8c1b179738d0@linux.intel.com
2021-07-28drm: bridge: dw-hdmi: Attach to next bridge if availableLaurent Pinchart1-1/+53
On all platforms except i.MX and Rockchip, the dw-hdmi DT bindings require a video output port connected to an HDMI sink (most likely an HDMI connector, in rare cases another bridges converting HDMI to another protocol). For those platforms, retrieve the next bridge and attach it from the dw-hdmi bridge attach handler. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com> # On V3U Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
2021-07-28drm/bridge: Centralize error message when bridge attach failsLaurent Pinchart4-22/+3
Being informed of a failure to attach a bridge is useful, and many drivers prints an error message in that case. Move the message to drm_bridge_attach() to avoid code duplication. Suggested-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Reviewed-by: Jyri Sarha <jyri.sarha@iki.fi>
2021-07-28drm/bridge: make a const array static, makes object smallerColin Ian King1-1/+1
Don't populate the const array frs_limits on the stack but instead make it static. Makes the object code smaller by 128 bytes: Before: text data bss dec hex filename 24845 7440 64 32349 7e5d ./drivers/gpu/drm/bridge/tc358768.o After: text data bss dec hex filename 24749 7408 64 32221 7ddd ./drivers/gpu/drm/bridge/tc358768.o (gcc version 10.2.0) Signed-off-by: Colin Ian King <colin.king@canonical.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
2021-07-27drm/bridge: dw-mipi-dsi: Find the possible DSI devicesJagan Teki1-15/+43
Finding panel_or_bridge might vary based on associated DSI devices like DSI panel, bridge, and I2C based DSI bridge. 1. DSI panels and bridges will invoke the host attach from probe in order to find the panel_or_bridge. chipone_probe() dw_mipi_dsi_host_attach().start dw_mipi_dsi_panel_or_bridge() ...found the panel_or_bridge... ltdc_encoder_init().start dw_mipi_dsi_bridge_attach().start dw_mipi_dsi_host_attach().start chipone_attach(). start chipone_attach(). done dw_mipi_dsi_host_attach().done dw_mipi_dsi_bridge_attach(). done ltdc_encoder_init().done 2. I2C based DSI bridge will invoke the drm_bridge_attach from bridge attach in order to find the panel_or_bridge. ltdc_encoder_init().start dw_mipi_dsi_bridge_attach().start dw_mipi_dsi_panel_or_bridge() ...found the panel_or_bridge... dw_mipi_dsi_host_attach().start sn65dsi83_attach(). start sn65dsi83_attach(). done dw_mipi_dsi_host_attach().done dw_mipi_dsi_bridge_attach(). done ltdc_encoder_init().done So, invoke the panel_or_bridge from host attach and bridge attach in order to find all possible DSI devices. Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> Tested-by: Yannick Fertre <yannick.fertre@foss.st.com> Reviewed-by: Robert Foss <robert.foss@linaro.org> Tested-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210704140309.268469-1-jagan@amarulasolutions.com
2021-07-27drm/dsi: Add _NO_ to MIPI_DSI_* flags disabling featuresNicolas Boichat5-6/+6
Many of the DSI flags have names opposite to their actual effects, e.g. MIPI_DSI_MODE_EOT_PACKET means that EoT packets will actually be disabled. Fix this by including _NO_ in the flag names, e.g. MIPI_DSI_MODE_NO_EOT_PACKET. Signed-off-by: Nicolas Boichat <drinkcat@chromium.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Robert Foss <robert.foss@linaro.org> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Andrzej Hajda <andrzej.hajda@samsung.com> Reviewed-by: Xin Ji <xji@analogixsemi.com> # anx7625.c Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org> # msm/dsi Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210727094435.v3.1.I629b2366a6591410359c7fcf6d385b474b705ca2@changeid
2021-07-25drm/bridge: nwl-dsi: Avoid potential multiplication overflow on 32-bitGeert Uytterhoeven1-1/+1
As nwl_dsi.lanes is u32, and NSEC_PER_SEC is 1000000000L, the second multiplication in dsi->lanes * 8 * NSEC_PER_SEC will overflow on a 32-bit platform. Fix this by making the constant unsigned long long, forcing 64-bit arithmetic. As iMX8 is arm64, this driver is currently used on 64-bit platforms only, where long is 64-bit, so this cannot happen. But the issue will start to happen when the driver is reused for a 32-bit SoC (e.g. i.MX7ULP), or when code is copied for a new driver. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Fabio Estevam <festevam@gmail.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/ebb82941a86b4e35c4fcfb1ef5a5cfad7c1fceab.1626255956.git.geert+renesas@glider.be
2021-07-10drm: bridge: nwl-dsi: Drop unused nwl_dsi_plat_clk_configJagan Teki1-6/+0
nwl_dsi_plat_clk_config structure added in below commit but not used anywhere in the driver. commit <44cfc6233447c> ("drm/bridge: Add NWL MIPI DSI host controller support") Drop it. Cc: Guido Günther <agx@sigxcpu.org> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> Reviewed-by: Guido Günther <agx@sigxcpu.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210704093433.27717-1-jagan@amarulasolutions.com
2021-06-24drm/bridge: ti-sn65dsi86: Split connector creation to a functionLaurent Pinchart1-10/+21
To prepare for making connector creation option, move connector creation out of ti_sn_bridge_attach to a separate function. No functional change intended. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210624000304.16281-7-laurent.pinchart+renesas@ideasonboard.com
2021-06-24drm/bridge: ti-sn65dsi86: Group code in sectionsLaurent Pinchart1-298/+321
Reorganize the functions in sections, related to connector operations, bridge operations, AUX adapter, GPIO controller and probe & remove. This prepares for proper support of DRM_BRIDGE_ATTACH_NO_CONNECTOR that will add more functions, to ensure that the code will stay readable. No functional change intended. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210624000304.16281-6-laurent.pinchart+renesas@ideasonboard.com
2021-06-24drm/bridge: ti-sn65dsi86: Wrap panel with panel-bridgeLaurent Pinchart1-12/+20
To simplify interfacing with the panel, wrap it in a panel-bridge and let the DRM bridge helpers handle chaining of operations. This also prepares for support of DRM_BRIDGE_ATTACH_NO_CONNECTOR, which requires all components in the display pipeline to be represented by bridges. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Jagan Teki <jagan@amarulasolutions.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210624000304.16281-5-laurent.pinchart+renesas@ideasonboard.com
2021-06-24drm/bridge: ti-sn65dsi86: Use bitmask to store valid ratesLaurent Pinchart1-11/+13
The valid rates are stored in an array of 8 booleans. Replace it with a bitmask to save space. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210624000304.16281-4-laurent.pinchart+renesas@ideasonboard.com
2021-06-24drm/bridge: ti-sn65dsi86: Make enable GPIO optionalLaurent Pinchart1-1/+2
The enable signal may not be controllable by the kernel. Make it optional. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Reviewed-by: Jagan Teki <jagan@amarulasolutions.com> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210624000304.16281-3-laurent.pinchart+renesas@ideasonboard.com
2021-06-22drm: bridge: ti-sn65dsi83: Retrieve the display mode from the stateLaurent Pinchart1-23/+26
Instead of storing a copy of the display mode in the sn65dsi83 structure, retrieve it from the atomic state in sn65dsi83_atomic_enable(). This allows the removal of the .mode_set() operation, and completes the transition to the atomic API. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210621125518.13715-6-laurent.pinchart@ideasonboard.com
2021-06-22drm: bridge: ti-sn65dsi83: Retrieve output format from bridge stateLaurent Pinchart1-37/+36
The driver currently iterates over all connectors to get the bus format, used to configure the LVDS output format. This causes several issues: - If other connectors than the LVDS output are present, the format used by the driver may end up belonging to an entirely different output. - The code can crash if some connectors are not connected, as bus_format may then be NULL. - There's no guarantee that the bus format on the connector at the output of the pipeline matches the output of the sn65dsi83, as there may be other bridges in the pipeline. Solve this by retrieving the format from the bridge state instead, which provides the format corresponding to the output of the bridge. The struct sn65dsi83 lvds_format_24bpp and lvds_format_jeida fields are moved to local variables in sn65dsi83_atomic_enable() as they're now used in that function only. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210621125518.13715-5-laurent.pinchart@ideasonboard.com
2021-06-22drm: bridge: ti-sn65dsi83: Switch to atomic operationsLaurent Pinchart1-11/+15
Use the atomic version of the enable/disable operations to continue the transition to the atomic API, started with the introduction of .atomic_get_input_bus_fmts(). This will be needed to access the mode from the atomic state. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210621125518.13715-4-laurent.pinchart@ideasonboard.com
2021-06-22drm: bridge: ti-sn65dsi83: Pass mode explicitly to helper functionsLaurent Pinchart1-6/+8
Pass the display mode explicitly to the sn65dsi83_get_lvds_range() and sn65dsi83_get_dsi_range() functions to prepare for its removal from the sn65dsi83 structure. This is not meant to bring any functional change. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210621125518.13715-3-laurent.pinchart@ideasonboard.com
2021-06-22drm: bridge: ti-sn65dsi83: Move LVDS format selection to .mode_set()Laurent Pinchart1-12/+2
The LVDS format is selected based on the bus format reported by the connector. This is currently done in .mode_fixup(), but that's not the right place, as the format should be selected when setting the mode. Move it to .mode_set(). Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210621125518.13715-2-laurent.pinchart@ideasonboard.com
2021-06-21drm/bridge: ti-sn65dsi83: Replace connector format patching with atomic_get_input_bus_fmtsMarek Vasut1-4/+31
Patching the connector format is causing various problematic side effects. Implement .atomic_get_input_bus_fmts callback instead, which sets up the input (DSI-end) format, and that format can then be used in pipeline format negotiation between the DSI-end of this bridge and the other component closer to the scanout engine. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Adam Ford <aford173@gmail.com> Cc: Douglas Anderson <dianders@chromium.org> Cc: Frieder Schrempf <frieder.schrempf@kontron.de> Cc: Jagan Teki <jagan@amarulasolutions.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Loic Poulain <loic.poulain@linaro.org> Cc: Philippe Schenker <philippe.schenker@toradex.com> Cc: Robert Foss <robert.foss@linaro.org> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Stephen Boyd <swboyd@chromium.org> Cc: Valentin Raevsky <valentin@compulab.co.il> Cc: dri-devel@lists.freedesktop.org Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210620224208.184719-1-marex@denx.de
2021-06-18drm/bridge: anx7625: Make hpd workqueue freezablePi-Hsun Shih1-2/+2
There were still a race condition between hpd work and suspend, since the workqueue work can still be run after anx7625 had powered off in suspend. Since we never want hpd work to run while suspending, and there's no harm to delay them to be run after resume, mark the workqueue as WQ_FREEZABLE so all works won't run while suspending. Fixes: 409776fa3c42 ("drm/bridge: anx7625: add suspend / resume hooks") Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org> Reviewed-by: Tzung-Bi Shih <tzungbi@google.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210615032937.2328468-1-pihsun@chromium.org
2021-06-16drivers: gpu: add missing MODULE_DEVICE_TABLE in anx7625.cYu Jiahua1-0/+1
This patch adds missing MODULE_DEVICE_TABLE definition which generates correct modalias for automatic loading of this driver when it is built as an external module. Signed-off-by: Yu Jiahua <yujiahua1@huawei.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Reviewed-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210616034448.34919-1-yujiahua1@huawei.com
2021-06-11drm/bridge: ti-sn65dsi86: Improve probe errors with dev_err_probe()Douglas Anderson1-18/+13
As I was testing to make sure that the DEFER path worked well with my patch series, I got tired of seeing this scary message in my logs just because the panel needed to defer: [drm:ti_sn_bridge_probe] *ERROR* could not find any panel node Let's use dev_err_probe() which nicely quiets this error and also simplifies the code a tiny bit. We'll also update other places in the file which can use dev_err_probe(). Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210611101711.v10.10.I24bba069e63b1eea84443eef0c8535fd032a6311@changeid
2021-06-11drm/bridge: ti-sn65dsi86: Don't read EDID blob over DDCDouglas Anderson1-22/+0
This is really just a revert of commit 58074b08c04a ("drm/bridge: ti-sn65dsi86: Read EDID blob over DDC"), resolving conflicts. The old code failed to read the EDID properly in a very important case: before the bridge's pre_enable() was called. The way things need to work: 1. Read the EDID. 2. Based on the EDID, decide on video settings and pixel clock. 3. Enable the bridge w/ the desired settings. The way things were working: 1. Try to read the EDID but fail; fall back to hardcoded values. 2. Based on hardcoded values, decide on video settings and pixel clock. 3. Enable the bridge w/ the desired settings. 4. Try again to read the EDID, it works now! 5. Realize that the hardcoded settings weren't quite right. 6. Disable / reenable the bridge w/ the right settings. The reasons for the failures were twofold: a) Since we never ran the bridge chip's pre-enable then we never set the bit to ignore HPD. This meant the bridge chip didn't even _try_ to go out on the bus and communicate with the panel. b) Even if we fixed things to ignore HPD, the EDID still wouldn't read if the panel wasn't on. Instead of reverting the code, we could fix it to set the HPD bit and also power on the panel. However, it also works nicely to just let the panel code read the EDID. Now that we've split the driver up we can expose the DDC AUX channel bus to the panel node. The panel can take charge of reading the EDID. NOTE: in order for things to work, anyone that needs to read the EDID will need to instantiate their panel using the new DP AUX bus (AKA by listing their panel under the "aux-bus" node of the bridge chip in the device tree). In the future if we want to use the bridge chip to provide a full external DP port (which won't have a panel) then we will have to conditinally add EDID reading back in. Suggested-by: Andrzej Hajda <a.hajda@samsung.com> Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210611101711.v10.9.I9330684c25f65bb318eff57f0616500f83eac3cc@changeid
2021-06-11drm/bridge: ti-sn65dsi86: Add support for the DP AUX busDouglas Anderson2-0/+7
We want to provide our panel with access to the DP AUX channel. The way to do this is to let our panel be a child of ours using the fancy new DP AUX bus support. Signed-off-by: Douglas Anderson <dianders@chromium.org> Acked-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Lyude Paul <lyude@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20210611101711.v10.8.Ib5fe0638da85800141ce141bb8e441c5f25438d4@changeid
2021-06-11drm/bridge: ti-sn65dsi86: Promote the AUX channel to its own sub-devDouglas Anderson1-19/+51
On its own, this change looks a little strange and doesn't do too much useful. To understand why we're doing this we need to look forward to future patches where we're going to probe our panel using the new DP AUX bus. See the patch ("drm/bridge: ti-sn65dsi86: Add support for the DP AUX bus"). Let's think about the set of steps we'll want to happen when we have the DP AUX bus: 1. We'll create the DP AUX bus. 2. We'll populate the devices on the DP AUX bus (AKA our panel). 3. For setting up the bridge-related functions of ti-sn65dsi86 we'll need to get a reference to the panel. If we do #1 - #3 in a single probe call things _mostly_ will work, but it won't be massively robust. Let's explore. First let's think of the easy case of no -EPROBE_DEFER. In that case in step #2 when we populate the devices on the DP AUX bus it will actually try probing the panel right away. Since the panel probe doesn't defer then in step #3 we'll get a reference to the panel and we're golden. Second, let's think of the case when the panel returns -EPROBE_DEFER. In that case step #2 won't synchronously create the panel (it'll just add the device to the defer list to do it later). Step #3 will fail to get the panel and the bridge sub-device will return -EPROBE_DEFER. We'll depopulate the DP AUX bus. Later we'll try the whole sequence again. Presumably the panel will eventually stop returning -EPROBE_DEFER and we'll go back to the first case where things were golden. So this case is OK too even if it's a bit ugly that we have to keep creating / deleting the AUX bus over and over. So where is the problem? As I said, it's mostly about robustness. I don't believe that step #2 (creating the sub-devices) is really guaranteed to be synchronous. This is evidenced by the fact that it's allowed to "succeed" by just sticking the device on the deferred list. If anything about the process changes in Linux as a whole and step #2 just kicks off the probe of the DP AUX endpoints (our panel) in the background then we'd be in trouble because we might never get the panel in step #3. Adding an extra sub-device means we just don't need to worry about it. We'll create the sub-device for the DP AUX bus and it won't go away until the whole ti-sn65dsi86 driver goes away. If the bridge sub-device defers (maybe because it can't find the panel) that won't depopulate the DP AUX bus and so we don't need to worry about it. NOTE: there's a little bit of a trick here. Though the AUX channel can run without the MIPI-to-eDP bits of the code, the MIPI-to-eDP bits can't run without the AUX channel. We could come up a complicated signaling scheme (have the MIPI-to-eDP bits return EPROBE_DEFER for a while or wait on some sort of completion), but it seems simple enough to just not even bother creating the bridge device until the AUX channel probes. That's what we'll do. Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Lyude Paul <lyude@redhat.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210611101711.v10.7.If89144992cb9d900f8c91a8d1817dbe00f543720@changeid
2021-06-09drm/bridge: ti-sn65dsi83: Fix sparse warningsMarek Vasut1-10/+11
Fix the following sparse warnings generated by "make C=1": drivers/gpu/drm/bridge/ti-sn65dsi83.c:429:13: warning: incorrect type in assignment (different base types) drivers/gpu/drm/bridge/ti-sn65dsi83.c:429:13: expected unsigned short [assigned] [usertype] val drivers/gpu/drm/bridge/ti-sn65dsi83.c:429:13: got restricted __le16 [usertype] drivers/gpu/drm/bridge/ti-sn65dsi83.c:432:13: warning: incorrect type in assignment (different base types) drivers/gpu/drm/bridge/ti-sn65dsi83.c:432:13: expected unsigned short [addressable] [assigned] [usertype] val drivers/gpu/drm/bridge/ti-sn65dsi83.c:432:13: got restricted __le16 [usertype] drivers/gpu/drm/bridge/ti-sn65dsi83.c:436:13: warning: incorrect type in assignment (different base types) drivers/gpu/drm/bridge/ti-sn65dsi83.c:436:13: expected unsigned short [addressable] [assigned] [usertype] val drivers/gpu/drm/bridge/ti-sn65dsi83.c:436:13: got restricted __le16 [usertype] drivers/gpu/drm/bridge/ti-sn65dsi83.c:438:13: warning: incorrect type in assignment (different base types) drivers/gpu/drm/bridge/ti-sn65dsi83.c:438:13: expected unsigned short [addressable] [assigned] [usertype] val drivers/gpu/drm/bridge/ti-sn65dsi83.c:438:13: got restricted __le16 [usertype] drivers/gpu/drm/bridge/ti-sn65dsi83.c:441:13: warning: incorrect type in assignment (different base types) drivers/gpu/drm/bridge/ti-sn65dsi83.c:441:13: expected unsigned short [addressable] [assigned] [usertype] val drivers/gpu/drm/bridge/ti-sn65dsi83.c:441:13: got restricted __le16 [usertype] Signed-off-by: Marek Vasut <marex@denx.de> Cc: Adam Ford <aford173@gmail.com> Cc: Douglas Anderson <dianders@chromium.org> Cc: Frieder Schrempf <frieder.schrempf@kontron.de> Cc: Jagan Teki <jagan@amarulasolutions.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Loic Poulain <loic.poulain@linaro.org> Cc: Marek Vasut <marex@denx.de> Cc: Philippe Schenker <philippe.schenker@toradex.com> Cc: Robert Foss <robert.foss@linaro.org> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Stephen Boyd <swboyd@chromium.org> Cc: Valentin Raevsky <valentin@compulab.co.il> To: dri-devel@lists.freedesktop.org Signed-off-by: Robert Foss <robert.foss@linaro.org> Reviewed-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210608142211.82333-1-marex@denx.de
2021-06-08drm/bridge: ti-sn65dsi83: Fix syntax formatting issuesMarek Vasut1-18/+18
Fix checkpatch.pl --strict -f drivers/gpu/drm/bridge/ti-sn65dsi83.c CHECKs, no functional change. This is the same modification done to V7 of the original patch. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Adam Ford <aford173@gmail.com> Cc: Douglas Anderson <dianders@chromium.org> Cc: Frieder Schrempf <frieder.schrempf@kontron.de> Cc: Jagan Teki <jagan@amarulasolutions.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Loic Poulain <loic.poulain@linaro.org> Cc: Marek Vasut <marex@denx.de> Cc: Philippe Schenker <philippe.schenker@toradex.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Stephen Boyd <swboyd@chromium.org> Cc: Valentin Raevsky <valentin@compulab.co.il> To: dri-devel@lists.freedesktop.org Reviewed-by: Robert Foss <robert.foss@linaro.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210608095322.23644-1-marex@denx.de
2021-06-08drm/bridge: ti-sn65dsi83: Add TI SN65DSI83 and SN65DSI84 driverMarek Vasut3-0/+720
Add driver for TI SN65DSI83 Single-link DSI to Single-link LVDS bridge and TI SN65DSI84 Single-link DSI to Dual-link or 2x Single-link LVDS bridge. TI SN65DSI85 is unsupported due to lack of hardware to test on, but easy to add. The driver operates the chip via I2C bus. Currently the LVDS clock are always derived from DSI clock lane, which is the usual mode of operation. Support for clock from external oscillator is not implemented, but it is easy to add if ever needed. Only RGB888 pixel format is implemented, the LVDS666 is not supported, but could be added if needed. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Frieder Schrempf <frieder.schrempf@kontron.de> Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de> Tested-by: Adam Ford <aford173@gmail.com> Signed-off-by: Marek Vasut <marex@denx.de> Cc: Douglas Anderson <dianders@chromium.org> Cc: Jagan Teki <jagan@amarulasolutions.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Loic Poulain <loic.poulain@linaro.org> Cc: Philippe Schenker <philippe.schenker@toradex.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Stephen Boyd <swboyd@chromium.org> Cc: Valentin Raevsky <valentin@compulab.co.il> To: dri-devel@lists.freedesktop.org Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210607174258.16300-2-marex@denx.de
2021-05-31drm: bridge: cdns-mhdp8546: Fix PM reference leak inYu Kuai1-2/+2
pm_runtime_get_sync will increment pm usage counter even it failed. Forgetting to putting operation will result in reference leak here. Fix it by replacing it with pm_runtime_resume_and_get to keep usage counter balanced. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: Yu Kuai <yukuai3@huawei.com> Reviewed-by: Robert Foss <robert.foss@linaro.org> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210531135622.3348252-1-yukuai3@huawei.com
2021-05-31drm/bridge: lt8912b: Drop unused includesLinus Walleij1-2/+0
The Lontium bridge is including legacy header files for GPIO but not using them. Delete the includes. Cc: Adrien Grassein <adrien.grassein@gmail.com> Cc: Robert Foss <robert.foss@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Reviewed-by: Adren Grassein <adrien.grassein@gmail.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210529002759.468964-1-linus.walleij@linaro.org
2021-05-27drm/bridge: DRM_CROS_EC_ANX7688 should depend on I2C_CROS_EC_TUNNELGeert Uytterhoeven1-0/+1
The ChromeOS EC ANX7688 bridge is connected to a ChromeOS Embedded Controller, and is accessed using I2C tunneling through the Embedded Controller. Hence add a dependency on I2C_CROS_EC_TUNNEL, to prevent asking the user about this driver when configuring a kernel without support for the ChromeOS EC tunnel I2C bus. Fixes: 44602b10d7f2a5f7 ("drm/bridge: Add ChromeOS EC ANX7688 bridge driver support") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Signed-off-by: Robert Foss <robert.foss@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/d107d1840b83607baee8571cc5d88973fc32b519.1622015323.git.geert+renesas@glider.be
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