![Daniel Vetter](/assets/img/avatar_default.png)
It's dead code, the core handles all this directly now. The only special case is nouveau and tda988x which used one function for both legacy modeset code and -nv50 atomic world instead of 2 vtables. But amounts to exactly the same. v2: Rebase over the panel/brideg refactorings in stm/ltdc. Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Cc: Archit Taneja <architt@codeaurora.org> Cc: Andrzej Hajda <a.hajda@samsung.com> Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com> Cc: Peter Senna Tschudin <peter.senna@collabora.com> Cc: Martin Donnelly <martin.donnelly@ge.com> Cc: Martyn Welch <martyn.welch@collabora.co.uk> Cc: Daniel Vetter <daniel.vetter@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Sean Paul <seanpaul@chromium.org> Cc: David Airlie <airlied@linux.ie> Cc: Inki Dae <inki.dae@samsung.com> Cc: Joonyoung Shim <jy0922.shim@samsung.com> Cc: Seung-Woo Kim <sw0312.kim@samsung.com> Cc: Kyungmin Park <kyungmin.park@samsung.com> Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Stefan Agner <stefan@agner.ch> Cc: Alison Wang <alison.wang@freescale.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Philipp Zabel <p.zabel@pengutronix.de> Cc: CK Hu <ck.hu@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Neil Armstrong <narmstrong@baylibre.com> Cc: Carlo Caione <carlo@caione.org> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Marek Vasut <marex@denx.de> Cc: Ben Skeggs <bskeggs@redhat.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Cc: Eric Anholt <eric@anholt.net> Cc: Mark Yao <mark.yao@rock-chips.com> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org> Cc: Vincent Abriou <vincent.abriou@st.com> Cc: Yannick Fertre <yannick.fertre@st.com> Cc: Philippe Cornu <philippe.cornu@st.com> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Chen-Yu Tsai <wens@csie.org> Cc: Thierry Reding <thierry.reding@gmail.com> Cc: Jonathan Hunter <jonathanh@nvidia.com> Cc: Jyri Sarha <jsarha@ti.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: John Stultz <john.stultz@linaro.org> Cc: Lars-Peter Clausen <lars@metafoo.de> Cc: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Cc: Jeffy Chen <jeffy.chen@rock-chips.com> Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com> Cc: Yakir Yang <kuankuan.y@gmail.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Jose Abreu <Jose.Abreu@synopsys.com> Cc: Romain Perier <romain.perier@collabora.com> Cc: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com> Cc: Xinliang Liu <z.liuxinliang@hisilicon.com> Cc: Alexey Brodkin <abrodkin@synopsys.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Rongrong Zou <zourongrong@gmail.com> Cc: Rob Clark <robdclark@gmail.com> Cc: Hai Li <hali@codeaurora.org> Cc: "Noralf Trønnes" <noralf@tronnes.org> Cc: linux-arm-kernel@lists.infradead.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: nouveau@lists.freedesktop.org Cc: linux-renesas-soc@vger.kernel.org Cc: linux-rockchip@lists.infradead.org Cc: linux-tegra@vger.kernel.org Cc: virtualization@lists.linux-foundation.org Cc: zain wang <wzz@rock-chips.com> Cc: Baoyou Xie <baoyou.xie@linaro.org> Cc: Boris Brezillon <boris.brezillon@free-electrons.com> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170725080122.20548-8-daniel.vetter@ffwll.ch Acked-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: Archit Taneja <architt@codeaurora.org> Tested-by: Philippe Cornu <philippe.cornu@st.com> (on stm) Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Acked-by: Shawn Guo <shawnguo@kernel.org> Acked-by: Shawn Guo <shawnguo@kernel.org> Acked-by: Noralf Trønnes <noralf@tronnes.org> Acked-by: Vincent Abriou <vincent.abriou@st.com>
531 lines
12 KiB
C
531 lines
12 KiB
C
/*
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* Copyright (C) 2017 Sanechips Technology Co., Ltd.
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* Copyright 2017 Linaro Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/mfd/syscon.h>
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#include <linux/regmap.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drmP.h>
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#include "zx_drm_drv.h"
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#include "zx_vga_regs.h"
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#include "zx_vou.h"
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struct zx_vga_pwrctrl {
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struct regmap *regmap;
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u32 reg;
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u32 mask;
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};
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struct zx_vga_i2c {
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struct i2c_adapter adap;
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struct mutex lock;
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};
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struct zx_vga {
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struct drm_connector connector;
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struct drm_encoder encoder;
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struct zx_vga_i2c *ddc;
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struct device *dev;
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void __iomem *mmio;
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struct clk *i2c_wclk;
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struct zx_vga_pwrctrl pwrctrl;
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struct completion complete;
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bool connected;
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};
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#define to_zx_vga(x) container_of(x, struct zx_vga, x)
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static void zx_vga_encoder_enable(struct drm_encoder *encoder)
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{
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struct zx_vga *vga = to_zx_vga(encoder);
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struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl;
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/* Set bit to power up VGA DACs */
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regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask,
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pwrctrl->mask);
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vou_inf_enable(VOU_VGA, encoder->crtc);
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}
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static void zx_vga_encoder_disable(struct drm_encoder *encoder)
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{
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struct zx_vga *vga = to_zx_vga(encoder);
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struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl;
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vou_inf_disable(VOU_VGA, encoder->crtc);
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/* Clear bit to power down VGA DACs */
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regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask, 0);
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}
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static const struct drm_encoder_helper_funcs zx_vga_encoder_helper_funcs = {
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.enable = zx_vga_encoder_enable,
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.disable = zx_vga_encoder_disable,
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};
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static const struct drm_encoder_funcs zx_vga_encoder_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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static int zx_vga_connector_get_modes(struct drm_connector *connector)
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{
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struct zx_vga *vga = to_zx_vga(connector);
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struct edid *edid;
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int ret;
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/*
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* Clear both detection bits to switch I2C bus from device
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* detecting to EDID reading.
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*/
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zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, 0);
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edid = drm_get_edid(connector, &vga->ddc->adap);
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if (!edid) {
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/*
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* If EDID reading fails, we set the device state into
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* disconnected. Locking is not required here, since the
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* VGA_AUTO_DETECT_SEL register write in irq handler cannot
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* be triggered when both detection bits are cleared as above.
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*/
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zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL,
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VGA_DETECT_SEL_NO_DEVICE);
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vga->connected = false;
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return 0;
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}
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/*
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* As edid reading succeeds, device must be connected, so we set
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* up detection bit for unplug interrupt here.
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*/
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zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, VGA_DETECT_SEL_HAS_DEVICE);
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drm_mode_connector_update_edid_property(connector, edid);
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ret = drm_add_edid_modes(connector, edid);
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kfree(edid);
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return ret;
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}
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static enum drm_mode_status
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zx_vga_connector_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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return MODE_OK;
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}
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static struct drm_connector_helper_funcs zx_vga_connector_helper_funcs = {
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.get_modes = zx_vga_connector_get_modes,
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.mode_valid = zx_vga_connector_mode_valid,
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};
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static enum drm_connector_status
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zx_vga_connector_detect(struct drm_connector *connector, bool force)
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{
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struct zx_vga *vga = to_zx_vga(connector);
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return vga->connected ? connector_status_connected :
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connector_status_disconnected;
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}
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static const struct drm_connector_funcs zx_vga_connector_funcs = {
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.fill_modes = drm_helper_probe_single_connector_modes,
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.detect = zx_vga_connector_detect,
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.destroy = drm_connector_cleanup,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static int zx_vga_register(struct drm_device *drm, struct zx_vga *vga)
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{
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struct drm_encoder *encoder = &vga->encoder;
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struct drm_connector *connector = &vga->connector;
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struct device *dev = vga->dev;
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int ret;
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encoder->possible_crtcs = VOU_CRTC_MASK;
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ret = drm_encoder_init(drm, encoder, &zx_vga_encoder_funcs,
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DRM_MODE_ENCODER_DAC, NULL);
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if (ret) {
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DRM_DEV_ERROR(dev, "failed to init encoder: %d\n", ret);
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return ret;
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};
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drm_encoder_helper_add(encoder, &zx_vga_encoder_helper_funcs);
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vga->connector.polled = DRM_CONNECTOR_POLL_HPD;
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ret = drm_connector_init(drm, connector, &zx_vga_connector_funcs,
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DRM_MODE_CONNECTOR_VGA);
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if (ret) {
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DRM_DEV_ERROR(dev, "failed to init connector: %d\n", ret);
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goto clean_encoder;
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};
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drm_connector_helper_add(connector, &zx_vga_connector_helper_funcs);
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ret = drm_mode_connector_attach_encoder(connector, encoder);
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if (ret) {
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DRM_DEV_ERROR(dev, "failed to attach encoder: %d\n", ret);
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goto clean_connector;
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};
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return 0;
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clean_connector:
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drm_connector_cleanup(connector);
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clean_encoder:
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drm_encoder_cleanup(encoder);
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return ret;
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}
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static int zx_vga_pwrctrl_init(struct zx_vga *vga)
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{
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struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl;
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struct device *dev = vga->dev;
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struct of_phandle_args out_args;
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struct regmap *regmap;
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int ret;
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ret = of_parse_phandle_with_fixed_args(dev->of_node,
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"zte,vga-power-control", 2, 0, &out_args);
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if (ret)
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return ret;
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regmap = syscon_node_to_regmap(out_args.np);
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if (IS_ERR(regmap)) {
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ret = PTR_ERR(regmap);
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goto out;
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}
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pwrctrl->regmap = regmap;
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pwrctrl->reg = out_args.args[0];
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pwrctrl->mask = out_args.args[1];
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out:
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of_node_put(out_args.np);
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return ret;
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}
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static int zx_vga_i2c_read(struct zx_vga *vga, struct i2c_msg *msg)
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{
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int len = msg->len;
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u8 *buf = msg->buf;
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u32 offset = 0;
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int i;
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reinit_completion(&vga->complete);
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/* Select combo write */
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zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_COMBO, VGA_CMD_COMBO);
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zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_RW, 0);
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while (len > 0) {
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u32 cnt;
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/* Clear RX FIFO */
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zx_writel_mask(vga->mmio + VGA_RXF_CTRL, VGA_RX_FIFO_CLEAR,
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VGA_RX_FIFO_CLEAR);
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/* Data offset to read from */
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zx_writel(vga->mmio + VGA_SUB_ADDR, offset);
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/* Kick off the transfer */
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zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_TRANS,
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VGA_CMD_TRANS);
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if (!wait_for_completion_timeout(&vga->complete,
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msecs_to_jiffies(1000))) {
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DRM_DEV_ERROR(vga->dev, "transfer timeout\n");
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return -ETIMEDOUT;
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}
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cnt = zx_readl(vga->mmio + VGA_RXF_STATUS);
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cnt = (cnt & VGA_RXF_COUNT_MASK) >> VGA_RXF_COUNT_SHIFT;
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/* FIFO status may report more data than we need to read */
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cnt = min_t(u32, len, cnt);
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for (i = 0; i < cnt; i++)
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*buf++ = zx_readl(vga->mmio + VGA_DATA);
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len -= cnt;
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offset += cnt;
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}
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return 0;
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}
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static int zx_vga_i2c_write(struct zx_vga *vga, struct i2c_msg *msg)
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{
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/*
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* The DDC I2C adapter is only for reading EDID data, so we assume
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* that the write to this adapter must be the EDID data offset.
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*/
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if ((msg->len != 1) || ((msg->addr != DDC_ADDR)))
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return -EINVAL;
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/* Hardware will take care of the slave address shifting */
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zx_writel(vga->mmio + VGA_DEVICE_ADDR, msg->addr);
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return 0;
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}
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static int zx_vga_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
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int num)
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{
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struct zx_vga *vga = i2c_get_adapdata(adap);
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struct zx_vga_i2c *ddc = vga->ddc;
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int ret = 0;
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int i;
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mutex_lock(&ddc->lock);
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for (i = 0; i < num; i++) {
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if (msgs[i].flags & I2C_M_RD)
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ret = zx_vga_i2c_read(vga, &msgs[i]);
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else
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ret = zx_vga_i2c_write(vga, &msgs[i]);
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if (ret < 0)
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break;
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}
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if (!ret)
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ret = num;
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mutex_unlock(&ddc->lock);
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return ret;
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}
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static u32 zx_vga_i2c_func(struct i2c_adapter *adapter)
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{
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return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
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}
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static const struct i2c_algorithm zx_vga_algorithm = {
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.master_xfer = zx_vga_i2c_xfer,
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.functionality = zx_vga_i2c_func,
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};
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static int zx_vga_ddc_register(struct zx_vga *vga)
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{
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struct device *dev = vga->dev;
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struct i2c_adapter *adap;
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struct zx_vga_i2c *ddc;
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int ret;
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ddc = devm_kzalloc(dev, sizeof(*ddc), GFP_KERNEL);
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if (!ddc)
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return -ENOMEM;
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vga->ddc = ddc;
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mutex_init(&ddc->lock);
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adap = &ddc->adap;
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adap->owner = THIS_MODULE;
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adap->class = I2C_CLASS_DDC;
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adap->dev.parent = dev;
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adap->algo = &zx_vga_algorithm;
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snprintf(adap->name, sizeof(adap->name), "zx vga i2c");
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ret = i2c_add_adapter(adap);
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if (ret) {
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DRM_DEV_ERROR(dev, "failed to add I2C adapter: %d\n", ret);
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return ret;
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}
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i2c_set_adapdata(adap, vga);
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return 0;
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}
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static irqreturn_t zx_vga_irq_thread(int irq, void *dev_id)
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{
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struct zx_vga *vga = dev_id;
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drm_helper_hpd_irq_event(vga->connector.dev);
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return IRQ_HANDLED;
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}
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static irqreturn_t zx_vga_irq_handler(int irq, void *dev_id)
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{
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struct zx_vga *vga = dev_id;
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u32 status;
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status = zx_readl(vga->mmio + VGA_I2C_STATUS);
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/* Clear interrupt status */
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zx_writel_mask(vga->mmio + VGA_I2C_STATUS, VGA_CLEAR_IRQ,
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VGA_CLEAR_IRQ);
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if (status & VGA_DEVICE_CONNECTED) {
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/*
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* Since VGA_DETECT_SEL bits need to be reset for switching DDC
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* bus from device detection to EDID read, rather than setting
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* up HAS_DEVICE bit here, we need to do that in .get_modes
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* hook for unplug detecting after EDID read succeeds.
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*/
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vga->connected = true;
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return IRQ_WAKE_THREAD;
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}
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if (status & VGA_DEVICE_DISCONNECTED) {
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zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL,
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VGA_DETECT_SEL_NO_DEVICE);
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vga->connected = false;
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return IRQ_WAKE_THREAD;
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}
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if (status & VGA_TRANS_DONE) {
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complete(&vga->complete);
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return IRQ_HANDLED;
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}
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return IRQ_NONE;
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}
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static void zx_vga_hw_init(struct zx_vga *vga)
|
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{
|
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unsigned long ref = clk_get_rate(vga->i2c_wclk);
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int div;
|
|
|
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/*
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* Set up I2C fast speed divider per formula below to get 400kHz.
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* scl = ref / ((div + 1) * 4)
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*/
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div = DIV_ROUND_UP(ref / 1000, 400 * 4) - 1;
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zx_writel(vga->mmio + VGA_CLK_DIV_FS, div);
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|
|
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/* Set up device detection */
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zx_writel(vga->mmio + VGA_AUTO_DETECT_PARA, 0x80);
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zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, VGA_DETECT_SEL_NO_DEVICE);
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|
|
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/*
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* We need to poke monitor via DDC bus to get connection irq
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* start working.
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|
*/
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zx_writel(vga->mmio + VGA_DEVICE_ADDR, DDC_ADDR);
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zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_TRANS, VGA_CMD_TRANS);
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}
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|
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static int zx_vga_bind(struct device *dev, struct device *master, void *data)
|
|
{
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|
struct platform_device *pdev = to_platform_device(dev);
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|
struct drm_device *drm = data;
|
|
struct resource *res;
|
|
struct zx_vga *vga;
|
|
int irq;
|
|
int ret;
|
|
|
|
vga = devm_kzalloc(dev, sizeof(*vga), GFP_KERNEL);
|
|
if (!vga)
|
|
return -ENOMEM;
|
|
|
|
vga->dev = dev;
|
|
dev_set_drvdata(dev, vga);
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
vga->mmio = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(vga->mmio))
|
|
return PTR_ERR(vga->mmio);
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0)
|
|
return irq;
|
|
|
|
vga->i2c_wclk = devm_clk_get(dev, "i2c_wclk");
|
|
if (IS_ERR(vga->i2c_wclk)) {
|
|
ret = PTR_ERR(vga->i2c_wclk);
|
|
DRM_DEV_ERROR(dev, "failed to get i2c_wclk: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = zx_vga_pwrctrl_init(vga);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dev, "failed to init power control: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = zx_vga_ddc_register(vga);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dev, "failed to register ddc: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = zx_vga_register(drm, vga);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dev, "failed to register vga: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
init_completion(&vga->complete);
|
|
|
|
ret = devm_request_threaded_irq(dev, irq, zx_vga_irq_handler,
|
|
zx_vga_irq_thread, IRQF_SHARED,
|
|
dev_name(dev), vga);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dev, "failed to request threaded irq: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = clk_prepare_enable(vga->i2c_wclk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
zx_vga_hw_init(vga);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void zx_vga_unbind(struct device *dev, struct device *master,
|
|
void *data)
|
|
{
|
|
struct zx_vga *vga = dev_get_drvdata(dev);
|
|
|
|
clk_disable_unprepare(vga->i2c_wclk);
|
|
}
|
|
|
|
static const struct component_ops zx_vga_component_ops = {
|
|
.bind = zx_vga_bind,
|
|
.unbind = zx_vga_unbind,
|
|
};
|
|
|
|
static int zx_vga_probe(struct platform_device *pdev)
|
|
{
|
|
return component_add(&pdev->dev, &zx_vga_component_ops);
|
|
}
|
|
|
|
static int zx_vga_remove(struct platform_device *pdev)
|
|
{
|
|
component_del(&pdev->dev, &zx_vga_component_ops);
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id zx_vga_of_match[] = {
|
|
{ .compatible = "zte,zx296718-vga", },
|
|
{ /* end */ },
|
|
};
|
|
MODULE_DEVICE_TABLE(of, zx_vga_of_match);
|
|
|
|
struct platform_driver zx_vga_driver = {
|
|
.probe = zx_vga_probe,
|
|
.remove = zx_vga_remove,
|
|
.driver = {
|
|
.name = "zx-vga",
|
|
.of_match_table = zx_vga_of_match,
|
|
},
|
|
};
|