| Message ID | 20220120083357.1541262-6-narmstrong@baylibre.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/meson: add support for MIPI DSI Display | expand |
On Thu, Jan 20, 2022 at 2:04 PM Neil Armstrong <narmstrong@baylibre.com> wrote: > > This adds an encoder bridge designed to drive a MIPI-DSI display > by using the ENCL encoder through the internal MIPI DSI transceiver > connected to the output of the ENCL pixel encoder. > > Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> > --- > drivers/gpu/drm/meson/Makefile | 2 +- > drivers/gpu/drm/meson/meson_drv.c | 7 + > drivers/gpu/drm/meson/meson_encoder_dsi.c | 160 ++++++++++++++++++++++ > drivers/gpu/drm/meson/meson_encoder_dsi.h | 12 ++ > 4 files changed, 180 insertions(+), 1 deletion(-) > create mode 100644 drivers/gpu/drm/meson/meson_encoder_dsi.c > create mode 100644 drivers/gpu/drm/meson/meson_encoder_dsi.h > > diff --git a/drivers/gpu/drm/meson/Makefile b/drivers/gpu/drm/meson/Makefile > index 3afa31bdc950..833e18c20603 100644 > --- a/drivers/gpu/drm/meson/Makefile > +++ b/drivers/gpu/drm/meson/Makefile > @@ -2,7 +2,7 @@ > meson-drm-y := meson_drv.o meson_plane.o meson_crtc.o meson_encoder_cvbs.o > meson-drm-y += meson_viu.o meson_vpp.o meson_venc.o meson_vclk.o meson_overlay.o > meson-drm-y += meson_rdma.o meson_osd_afbcd.o > -meson-drm-y += meson_encoder_hdmi.o > +meson-drm-y += meson_encoder_hdmi.o meson_encoder_dsi.o > > obj-$(CONFIG_DRM_MESON) += meson-drm.o > obj-$(CONFIG_DRM_MESON_DW_HDMI) += meson_dw_hdmi.o > diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c > index 26aeaf0ab86e..15344cf9f913 100644 > --- a/drivers/gpu/drm/meson/meson_drv.c > +++ b/drivers/gpu/drm/meson/meson_drv.c > @@ -33,6 +33,7 @@ > #include "meson_registers.h" > #include "meson_encoder_cvbs.h" > #include "meson_encoder_hdmi.h" > +#include "meson_encoder_dsi.h" > #include "meson_viu.h" > #include "meson_vpp.h" > #include "meson_rdma.h" > @@ -323,6 +324,12 @@ static int meson_drv_bind_master(struct device *dev, bool has_components) > if (ret) > goto exit_afbcd; > > + if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) { > + ret = meson_encoder_dsi_init(priv); > + if (ret) > + goto free_drm; > + } > + > ret = meson_plane_create(priv); > if (ret) > goto exit_afbcd; > diff --git a/drivers/gpu/drm/meson/meson_encoder_dsi.c b/drivers/gpu/drm/meson/meson_encoder_dsi.c > new file mode 100644 > index 000000000000..12a586316183 > --- /dev/null > +++ b/drivers/gpu/drm/meson/meson_encoder_dsi.c > @@ -0,0 +1,160 @@ > +// SPDX-License-Identifier: GPL-2.0-or-later > +/* > + * Copyright (C) 2016 BayLibre, SAS > + * Author: Neil Armstrong <narmstrong@baylibre.com> > + * Copyright (C) 2015 Amlogic, Inc. All rights reserved. > + */ > + > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/of_device.h> > +#include <linux/of_graph.h> > + > +#include <drm/drm_atomic_helper.h> > +#include <drm/drm_simple_kms_helper.h> > +#include <drm/drm_bridge.h> > +#include <drm/drm_bridge_connector.h> > +#include <drm/drm_device.h> > +#include <drm/drm_probe_helper.h> > + > +#include "meson_drv.h" > +#include "meson_encoder_dsi.h" > +#include "meson_registers.h" > +#include "meson_venc.h" > +#include "meson_vclk.h" > + > +struct meson_encoder_dsi { > + struct drm_encoder encoder; > + struct drm_bridge bridge; > + struct drm_bridge *next_bridge; > + struct meson_drm *priv; > +}; > + > +#define bridge_to_meson_encoder_dsi(x) \ > + container_of(x, struct meson_encoder_dsi, bridge) > + > +static int meson_encoder_dsi_attach(struct drm_bridge *bridge, > + enum drm_bridge_attach_flags flags) > +{ > + struct meson_encoder_dsi *encoder_dsi = bridge_to_meson_encoder_dsi(bridge); > + > + return drm_bridge_attach(bridge->encoder, encoder_dsi->next_bridge, > + &encoder_dsi->bridge, flags); > +} > + > +static void meson_encoder_dsi_mode_set(struct drm_bridge *bridge, > + const struct drm_display_mode *mode, > + const struct drm_display_mode *adjusted_mode) > +{ > + struct meson_encoder_dsi *encoder_dsi = bridge_to_meson_encoder_dsi(bridge); > + struct meson_drm *priv = encoder_dsi->priv; > + > + meson_vclk_setup(priv, MESON_VCLK_TARGET_DSI, mode->clock, 0, 0, 0, false); > + > + meson_venc_mipi_dsi_mode_set(priv, mode); > + meson_encl_load_gamma(priv); > + > + writel_relaxed(0, priv->io_base + _REG(ENCL_VIDEO_EN)); > + > + writel_bits_relaxed(ENCL_VIDEO_MODE_ADV_VFIFO_EN, ENCL_VIDEO_MODE_ADV_VFIFO_EN, > + priv->io_base + _REG(ENCL_VIDEO_MODE_ADV)); > + writel_relaxed(0, priv->io_base + _REG(ENCL_TST_EN)); > +} > + > +static void meson_encoder_dsi_atomic_enable(struct drm_bridge *bridge, > + struct drm_bridge_state *bridge_state) > +{ > + struct meson_encoder_dsi *encoder_dsi = bridge_to_meson_encoder_dsi(bridge); > + struct meson_drm *priv = encoder_dsi->priv; > + > + writel_bits_relaxed(BIT(0), 0, priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_EN_CTRL)); > + > + writel_relaxed(1, priv->io_base + _REG(ENCL_VIDEO_EN)); > +} > + > +static void meson_encoder_dsi_atomic_disable(struct drm_bridge *bridge, > + struct drm_bridge_state *bridge_state) > +{ > + struct meson_encoder_dsi *meson_encoder_dsi = > + bridge_to_meson_encoder_dsi(bridge); > + struct meson_drm *priv = meson_encoder_dsi->priv; > + > + writel_relaxed(0, priv->io_base + _REG(ENCL_VIDEO_EN)); > + > + writel_bits_relaxed(BIT(0), BIT(0), priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_EN_CTRL)); > +} > + > +static const struct drm_bridge_funcs meson_encoder_dsi_bridge_funcs = { > + .attach = meson_encoder_dsi_attach, > + /* > + * TOFIX: remove when dw-mipi-dsi moves out of mode_set > + * We should get rid of mode_set, but until dw-mipi-dsi uses it > + * we need to setup the pixel clock before the following > + * bridge tries to setup the HW. > + */ > + .mode_set = meson_encoder_dsi_mode_set, > + .atomic_enable = meson_encoder_dsi_atomic_enable, > + .atomic_disable = meson_encoder_dsi_atomic_disable, > + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, > + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, > + .atomic_reset = drm_atomic_helper_bridge_reset, > +}; > + > +int meson_encoder_dsi_init(struct meson_drm *priv) > +{ > + struct meson_encoder_dsi *meson_encoder_dsi; > + struct device_node *remote; > + int ret; > + > + meson_encoder_dsi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_dsi), GFP_KERNEL); > + if (!meson_encoder_dsi) > + return -ENOMEM; > + > + /* DSI Transceiver Bridge */ > + remote = of_graph_get_remote_node(priv->dev->of_node, 2, 0); > + if (!remote) { > + dev_err(priv->dev, "DSI transceiver device is disabled"); > + return 0; > + } > + > + meson_encoder_dsi->next_bridge = of_drm_find_bridge(remote); > + if (!meson_encoder_dsi->next_bridge) { > + dev_dbg(priv->dev, "Failed to find DSI transceiver bridge: %d\n", ret); > + return -EPROBE_DEFER; > + } > + > + /* DSI Encoder Bridge */ > + meson_encoder_dsi->bridge.funcs = &meson_encoder_dsi_bridge_funcs; > + meson_encoder_dsi->bridge.of_node = priv->dev->of_node; > + meson_encoder_dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; > + > + drm_bridge_add(&meson_encoder_dsi->bridge); > + > + meson_encoder_dsi->priv = priv; > + > + /* Encoder */ > + ret = drm_simple_encoder_init(priv->drm, &meson_encoder_dsi->encoder, > + DRM_MODE_ENCODER_DSI); > + if (ret) { > + dev_err(priv->dev, "Failed to init DSI encoder: %d\n", ret); > + return ret; > + } > + > + meson_encoder_dsi->encoder.possible_crtcs = BIT(0); > + > + /* Attach DSI Encoder Bridge to Encoder */ > + ret = drm_bridge_attach(&meson_encoder_dsi->encoder, &meson_encoder_dsi->bridge, NULL, 0); > + if (ret) { > + dev_err(priv->dev, "Failed to attach bridge: %d\n", ret); > + return ret; > + } > + > + /* > + * We should have now in place: > + * encoder->[dsi encoder bridge]->[dw-mipi-dsi bridge]->[panel bridge]->[panel] > + */ Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/drivers/gpu/drm/meson/Makefile b/drivers/gpu/drm/meson/Makefile index 3afa31bdc950..833e18c20603 100644 --- a/drivers/gpu/drm/meson/Makefile +++ b/drivers/gpu/drm/meson/Makefile @@ -2,7 +2,7 @@ meson-drm-y := meson_drv.o meson_plane.o meson_crtc.o meson_encoder_cvbs.o meson-drm-y += meson_viu.o meson_vpp.o meson_venc.o meson_vclk.o meson_overlay.o meson-drm-y += meson_rdma.o meson_osd_afbcd.o -meson-drm-y += meson_encoder_hdmi.o +meson-drm-y += meson_encoder_hdmi.o meson_encoder_dsi.o obj-$(CONFIG_DRM_MESON) += meson-drm.o obj-$(CONFIG_DRM_MESON_DW_HDMI) += meson_dw_hdmi.o diff --git a/drivers/gpu/drm/meson/meson_drv.c b/drivers/gpu/drm/meson/meson_drv.c index 26aeaf0ab86e..15344cf9f913 100644 --- a/drivers/gpu/drm/meson/meson_drv.c +++ b/drivers/gpu/drm/meson/meson_drv.c @@ -33,6 +33,7 @@ #include "meson_registers.h" #include "meson_encoder_cvbs.h" #include "meson_encoder_hdmi.h" +#include "meson_encoder_dsi.h" #include "meson_viu.h" #include "meson_vpp.h" #include "meson_rdma.h" @@ -323,6 +324,12 @@ static int meson_drv_bind_master(struct device *dev, bool has_components) if (ret) goto exit_afbcd; + if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) { + ret = meson_encoder_dsi_init(priv); + if (ret) + goto free_drm; + } + ret = meson_plane_create(priv); if (ret) goto exit_afbcd; diff --git a/drivers/gpu/drm/meson/meson_encoder_dsi.c b/drivers/gpu/drm/meson/meson_encoder_dsi.c new file mode 100644 index 000000000000..12a586316183 --- /dev/null +++ b/drivers/gpu/drm/meson/meson_encoder_dsi.c @@ -0,0 +1,160 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2016 BayLibre, SAS + * Author: Neil Armstrong <narmstrong@baylibre.com> + * Copyright (C) 2015 Amlogic, Inc. All rights reserved. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of_device.h> +#include <linux/of_graph.h> + +#include <drm/drm_atomic_helper.h> +#include <drm/drm_simple_kms_helper.h> +#include <drm/drm_bridge.h> +#include <drm/drm_bridge_connector.h> +#include <drm/drm_device.h> +#include <drm/drm_probe_helper.h> + +#include "meson_drv.h" +#include "meson_encoder_dsi.h" +#include "meson_registers.h" +#include "meson_venc.h" +#include "meson_vclk.h" + +struct meson_encoder_dsi { + struct drm_encoder encoder; + struct drm_bridge bridge; + struct drm_bridge *next_bridge; + struct meson_drm *priv; +}; + +#define bridge_to_meson_encoder_dsi(x) \ + container_of(x, struct meson_encoder_dsi, bridge) + +static int meson_encoder_dsi_attach(struct drm_bridge *bridge, + enum drm_bridge_attach_flags flags) +{ + struct meson_encoder_dsi *encoder_dsi = bridge_to_meson_encoder_dsi(bridge); + + return drm_bridge_attach(bridge->encoder, encoder_dsi->next_bridge, + &encoder_dsi->bridge, flags); +} + +static void meson_encoder_dsi_mode_set(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + const struct drm_display_mode *adjusted_mode) +{ + struct meson_encoder_dsi *encoder_dsi = bridge_to_meson_encoder_dsi(bridge); + struct meson_drm *priv = encoder_dsi->priv; + + meson_vclk_setup(priv, MESON_VCLK_TARGET_DSI, mode->clock, 0, 0, 0, false); + + meson_venc_mipi_dsi_mode_set(priv, mode); + meson_encl_load_gamma(priv); + + writel_relaxed(0, priv->io_base + _REG(ENCL_VIDEO_EN)); + + writel_bits_relaxed(ENCL_VIDEO_MODE_ADV_VFIFO_EN, ENCL_VIDEO_MODE_ADV_VFIFO_EN, + priv->io_base + _REG(ENCL_VIDEO_MODE_ADV)); + writel_relaxed(0, priv->io_base + _REG(ENCL_TST_EN)); +} + +static void meson_encoder_dsi_atomic_enable(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state) +{ + struct meson_encoder_dsi *encoder_dsi = bridge_to_meson_encoder_dsi(bridge); + struct meson_drm *priv = encoder_dsi->priv; + + writel_bits_relaxed(BIT(0), 0, priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_EN_CTRL)); + + writel_relaxed(1, priv->io_base + _REG(ENCL_VIDEO_EN)); +} + +static void meson_encoder_dsi_atomic_disable(struct drm_bridge *bridge, + struct drm_bridge_state *bridge_state) +{ + struct meson_encoder_dsi *meson_encoder_dsi = + bridge_to_meson_encoder_dsi(bridge); + struct meson_drm *priv = meson_encoder_dsi->priv; + + writel_relaxed(0, priv->io_base + _REG(ENCL_VIDEO_EN)); + + writel_bits_relaxed(BIT(0), BIT(0), priv->io_base + _REG(VPP_WRAP_OSD1_MATRIX_EN_CTRL)); +} + +static const struct drm_bridge_funcs meson_encoder_dsi_bridge_funcs = { + .attach = meson_encoder_dsi_attach, + /* + * TOFIX: remove when dw-mipi-dsi moves out of mode_set + * We should get rid of mode_set, but until dw-mipi-dsi uses it + * we need to setup the pixel clock before the following + * bridge tries to setup the HW. + */ + .mode_set = meson_encoder_dsi_mode_set, + .atomic_enable = meson_encoder_dsi_atomic_enable, + .atomic_disable = meson_encoder_dsi_atomic_disable, + .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, + .atomic_reset = drm_atomic_helper_bridge_reset, +}; + +int meson_encoder_dsi_init(struct meson_drm *priv) +{ + struct meson_encoder_dsi *meson_encoder_dsi; + struct device_node *remote; + int ret; + + meson_encoder_dsi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_dsi), GFP_KERNEL); + if (!meson_encoder_dsi) + return -ENOMEM; + + /* DSI Transceiver Bridge */ + remote = of_graph_get_remote_node(priv->dev->of_node, 2, 0); + if (!remote) { + dev_err(priv->dev, "DSI transceiver device is disabled"); + return 0; + } + + meson_encoder_dsi->next_bridge = of_drm_find_bridge(remote); + if (!meson_encoder_dsi->next_bridge) { + dev_dbg(priv->dev, "Failed to find DSI transceiver bridge: %d\n", ret); + return -EPROBE_DEFER; + } + + /* DSI Encoder Bridge */ + meson_encoder_dsi->bridge.funcs = &meson_encoder_dsi_bridge_funcs; + meson_encoder_dsi->bridge.of_node = priv->dev->of_node; + meson_encoder_dsi->bridge.type = DRM_MODE_CONNECTOR_DSI; + + drm_bridge_add(&meson_encoder_dsi->bridge); + + meson_encoder_dsi->priv = priv; + + /* Encoder */ + ret = drm_simple_encoder_init(priv->drm, &meson_encoder_dsi->encoder, + DRM_MODE_ENCODER_DSI); + if (ret) { + dev_err(priv->dev, "Failed to init DSI encoder: %d\n", ret); + return ret; + } + + meson_encoder_dsi->encoder.possible_crtcs = BIT(0); + + /* Attach DSI Encoder Bridge to Encoder */ + ret = drm_bridge_attach(&meson_encoder_dsi->encoder, &meson_encoder_dsi->bridge, NULL, 0); + if (ret) { + dev_err(priv->dev, "Failed to attach bridge: %d\n", ret); + return ret; + } + + /* + * We should have now in place: + * encoder->[dsi encoder bridge]->[dw-mipi-dsi bridge]->[panel bridge]->[panel] + */ + + dev_dbg(priv->dev, "DSI encoder initialized\n"); + + return 0; +} diff --git a/drivers/gpu/drm/meson/meson_encoder_dsi.h b/drivers/gpu/drm/meson/meson_encoder_dsi.h new file mode 100644 index 000000000000..0f4b641eb633 --- /dev/null +++ b/drivers/gpu/drm/meson/meson_encoder_dsi.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (C) 2021 BayLibre, SAS + * Author: Neil Armstrong <narmstrong@baylibre.com> + */ + +#ifndef __MESON_ENCODER_DSI_H +#define __MESON_ENCODER_DSI_H + +int meson_encoder_dsi_init(struct meson_drm *priv); + +#endif /* __MESON_ENCODER_DSI_H */
This adds an encoder bridge designed to drive a MIPI-DSI display by using the ENCL encoder through the internal MIPI DSI transceiver connected to the output of the ENCL pixel encoder. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> --- drivers/gpu/drm/meson/Makefile | 2 +- drivers/gpu/drm/meson/meson_drv.c | 7 + drivers/gpu/drm/meson/meson_encoder_dsi.c | 160 ++++++++++++++++++++++ drivers/gpu/drm/meson/meson_encoder_dsi.h | 12 ++ 4 files changed, 180 insertions(+), 1 deletion(-) create mode 100644 drivers/gpu/drm/meson/meson_encoder_dsi.c create mode 100644 drivers/gpu/drm/meson/meson_encoder_dsi.h