mirror of https://github.com/hak5/openwrt.git
674 lines
19 KiB
Diff
674 lines
19 KiB
Diff
From fe826daeea975dcf3ce3fca6e8a0850e5761f602 Mon Sep 17 00:00:00 2001
|
|
From: Eric Anholt <eric@anholt.net>
|
|
Date: Wed, 10 Feb 2016 11:42:32 -0800
|
|
Subject: [PATCH] drm/vc4: Add DPI driver
|
|
|
|
The DPI interface involves taking a ton of our GPIOs to be used as
|
|
outputs, and routing display signals over them in parallel.
|
|
|
|
v2: Use display_info.bus_formats[] to replace our custom DT
|
|
properties.
|
|
v3: Rebase on V3D documentation changes.
|
|
v4: Fix rebase detritus from V3D documentation changes.
|
|
|
|
Signed-off-by: Eric Anholt <eric@anholt.net>
|
|
Acked-by: Rob Herring <robh@kernel.org>
|
|
(cherry picked from commit 08302c35b59d306ff37b996e56fb2a488c1d2c2e)
|
|
---
|
|
.../devicetree/bindings/display/brcm,bcm-vc4.txt | 36 ++
|
|
drivers/gpu/drm/vc4/Kconfig | 1 +
|
|
drivers/gpu/drm/vc4/Makefile | 1 +
|
|
drivers/gpu/drm/vc4/vc4_debugfs.c | 1 +
|
|
drivers/gpu/drm/vc4/vc4_dpi.c | 520 +++++++++++++++++++++
|
|
drivers/gpu/drm/vc4/vc4_drv.c | 1 +
|
|
drivers/gpu/drm/vc4/vc4_drv.h | 5 +
|
|
7 files changed, 565 insertions(+)
|
|
create mode 100644 drivers/gpu/drm/vc4/vc4_dpi.c
|
|
|
|
--- a/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt
|
|
+++ b/Documentation/devicetree/bindings/display/brcm,bcm-vc4.txt
|
|
@@ -35,12 +35,22 @@ Optional properties for HDMI:
|
|
as an interrupt/status bit in the HDMI controller
|
|
itself). See bindings/pinctrl/brcm,bcm2835-gpio.txt
|
|
|
|
+Required properties for DPI:
|
|
+- compatible: Should be "brcm,bcm2835-dpi"
|
|
+- reg: Physical base address and length of the registers
|
|
+- clocks: a) core: The core clock the unit runs on
|
|
+ b) pixel: The pixel clock that feeds the pixelvalve
|
|
+- port: Port node with a single endpoint connecting to the panel
|
|
+ device, as defined in [1]
|
|
+
|
|
Required properties for V3D:
|
|
- compatible: Should be "brcm,bcm2835-v3d"
|
|
- reg: Physical base address and length of the V3D's registers
|
|
- interrupts: The interrupt number
|
|
See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
|
|
|
|
+[1] Documentation/devicetree/bindings/media/video-interfaces.txt
|
|
+
|
|
Example:
|
|
pixelvalve@7e807000 {
|
|
compatible = "brcm,bcm2835-pixelvalve2";
|
|
@@ -66,6 +76,22 @@ hdmi: hdmi@7e902000 {
|
|
clock-names = "pixel", "hdmi";
|
|
};
|
|
|
|
+dpi: dpi@7e208000 {
|
|
+ compatible = "brcm,bcm2835-dpi";
|
|
+ reg = <0x7e208000 0x8c>;
|
|
+ clocks = <&clocks BCM2835_CLOCK_VPU>,
|
|
+ <&clocks BCM2835_CLOCK_DPI>;
|
|
+ clock-names = "core", "pixel";
|
|
+ #address-cells = <1>;
|
|
+ #size-cells = <0>;
|
|
+
|
|
+ port {
|
|
+ dpi_out: endpoint@0 {
|
|
+ remote-endpoint = <&panel_in>;
|
|
+ };
|
|
+ };
|
|
+};
|
|
+
|
|
v3d: v3d@7ec00000 {
|
|
compatible = "brcm,bcm2835-v3d";
|
|
reg = <0x7ec00000 0x1000>;
|
|
@@ -75,3 +101,13 @@ v3d: v3d@7ec00000 {
|
|
vc4: gpu {
|
|
compatible = "brcm,bcm2835-vc4";
|
|
};
|
|
+
|
|
+panel: panel {
|
|
+ compatible = "ontat,yx700wv03", "simple-panel";
|
|
+
|
|
+ port {
|
|
+ panel_in: endpoint {
|
|
+ remote-endpoint = <&dpi_out>;
|
|
+ };
|
|
+ };
|
|
+};
|
|
--- a/drivers/gpu/drm/vc4/Kconfig
|
|
+++ b/drivers/gpu/drm/vc4/Kconfig
|
|
@@ -5,6 +5,7 @@ config DRM_VC4
|
|
select DRM_KMS_HELPER
|
|
select DRM_KMS_CMA_HELPER
|
|
select DRM_GEM_CMA_HELPER
|
|
+ select DRM_PANEL
|
|
help
|
|
Choose this option if you have a system that has a Broadcom
|
|
VC4 GPU, such as the Raspberry Pi or other BCM2708/BCM2835.
|
|
--- a/drivers/gpu/drm/vc4/Makefile
|
|
+++ b/drivers/gpu/drm/vc4/Makefile
|
|
@@ -7,6 +7,7 @@ vc4-y := \
|
|
vc4_bo.o \
|
|
vc4_crtc.o \
|
|
vc4_drv.o \
|
|
+ vc4_dpi.o \
|
|
vc4_kms.o \
|
|
vc4_gem.o \
|
|
vc4_hdmi.o \
|
|
--- a/drivers/gpu/drm/vc4/vc4_debugfs.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_debugfs.c
|
|
@@ -17,6 +17,7 @@
|
|
|
|
static const struct drm_info_list vc4_debugfs_list[] = {
|
|
{"bo_stats", vc4_bo_stats_debugfs, 0},
|
|
+ {"dpi_regs", vc4_dpi_debugfs_regs, 0},
|
|
{"gem_exec", vc4_gem_exec_debugfs, 0},
|
|
{"hdmi_regs", vc4_hdmi_debugfs_regs, 0},
|
|
{"hvs_regs", vc4_hvs_debugfs_regs, 0},
|
|
--- /dev/null
|
|
+++ b/drivers/gpu/drm/vc4/vc4_dpi.c
|
|
@@ -0,0 +1,520 @@
|
|
+/*
|
|
+ * Copyright (C) 2016 Broadcom Limited
|
|
+ *
|
|
+ * This program is free software; you can redistribute it and/or modify it
|
|
+ * under the terms of the GNU General Public License version 2 as published by
|
|
+ * the Free Software Foundation.
|
|
+ *
|
|
+ * This program is distributed in the hope that it will be useful, but WITHOUT
|
|
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
+ * more details.
|
|
+ *
|
|
+ * You should have received a copy of the GNU General Public License along with
|
|
+ * this program. If not, see <http://www.gnu.org/licenses/>.
|
|
+ */
|
|
+
|
|
+/**
|
|
+ * DOC: VC4 DPI module
|
|
+ *
|
|
+ * The VC4 DPI hardware supports MIPI DPI type 4 and Nokia ViSSI
|
|
+ * signals, which are routed out to GPIO0-27 with the ALT2 function.
|
|
+ */
|
|
+
|
|
+#include "drm_atomic_helper.h"
|
|
+#include "drm_crtc_helper.h"
|
|
+#include "drm_edid.h"
|
|
+#include "drm_panel.h"
|
|
+#include "linux/clk.h"
|
|
+#include "linux/component.h"
|
|
+#include "linux/of_graph.h"
|
|
+#include "linux/of_platform.h"
|
|
+#include "vc4_drv.h"
|
|
+#include "vc4_regs.h"
|
|
+
|
|
+#define DPI_C 0x00
|
|
+# define DPI_OUTPUT_ENABLE_MODE BIT(16)
|
|
+
|
|
+/* The order field takes the incoming 24 bit RGB from the pixel valve
|
|
+ * and shuffles the 3 channels.
|
|
+ */
|
|
+# define DPI_ORDER_MASK VC4_MASK(15, 14)
|
|
+# define DPI_ORDER_SHIFT 14
|
|
+# define DPI_ORDER_RGB 0
|
|
+# define DPI_ORDER_BGR 1
|
|
+# define DPI_ORDER_GRB 2
|
|
+# define DPI_ORDER_BRG 3
|
|
+
|
|
+/* The format field takes the ORDER-shuffled pixel valve data and
|
|
+ * formats it onto the output lines.
|
|
+ */
|
|
+# define DPI_FORMAT_MASK VC4_MASK(13, 11)
|
|
+# define DPI_FORMAT_SHIFT 11
|
|
+/* This define is named in the hardware, but actually just outputs 0. */
|
|
+# define DPI_FORMAT_9BIT_666_RGB 0
|
|
+/* Outputs 00000000rrrrrggggggbbbbb */
|
|
+# define DPI_FORMAT_16BIT_565_RGB_1 1
|
|
+/* Outputs 000rrrrr00gggggg000bbbbb */
|
|
+# define DPI_FORMAT_16BIT_565_RGB_2 2
|
|
+/* Outputs 00rrrrr000gggggg00bbbbb0 */
|
|
+# define DPI_FORMAT_16BIT_565_RGB_3 3
|
|
+/* Outputs 000000rrrrrrggggggbbbbbb */
|
|
+# define DPI_FORMAT_18BIT_666_RGB_1 4
|
|
+/* Outputs 00rrrrrr00gggggg00bbbbbb */
|
|
+# define DPI_FORMAT_18BIT_666_RGB_2 5
|
|
+/* Outputs rrrrrrrrggggggggbbbbbbbb */
|
|
+# define DPI_FORMAT_24BIT_888_RGB 6
|
|
+
|
|
+/* Reverses the polarity of the corresponding signal */
|
|
+# define DPI_PIXEL_CLK_INVERT BIT(10)
|
|
+# define DPI_HSYNC_INVERT BIT(9)
|
|
+# define DPI_VSYNC_INVERT BIT(8)
|
|
+# define DPI_OUTPUT_ENABLE_INVERT BIT(7)
|
|
+
|
|
+/* Outputs the signal the falling clock edge instead of rising. */
|
|
+# define DPI_HSYNC_NEGATE BIT(6)
|
|
+# define DPI_VSYNC_NEGATE BIT(5)
|
|
+# define DPI_OUTPUT_ENABLE_NEGATE BIT(4)
|
|
+
|
|
+/* Disables the signal */
|
|
+# define DPI_HSYNC_DISABLE BIT(3)
|
|
+# define DPI_VSYNC_DISABLE BIT(2)
|
|
+# define DPI_OUTPUT_ENABLE_DISABLE BIT(1)
|
|
+
|
|
+/* Power gate to the device, full reset at 0 -> 1 transition */
|
|
+# define DPI_ENABLE BIT(0)
|
|
+
|
|
+/* All other registers besides DPI_C return the ID */
|
|
+#define DPI_ID 0x04
|
|
+# define DPI_ID_VALUE 0x00647069
|
|
+
|
|
+/* General DPI hardware state. */
|
|
+struct vc4_dpi {
|
|
+ struct platform_device *pdev;
|
|
+
|
|
+ struct drm_encoder *encoder;
|
|
+ struct drm_connector *connector;
|
|
+ struct drm_panel *panel;
|
|
+
|
|
+ void __iomem *regs;
|
|
+
|
|
+ struct clk *pixel_clock;
|
|
+ struct clk *core_clock;
|
|
+};
|
|
+
|
|
+#define DPI_READ(offset) readl(dpi->regs + (offset))
|
|
+#define DPI_WRITE(offset, val) writel(val, dpi->regs + (offset))
|
|
+
|
|
+/* VC4 DPI encoder KMS struct */
|
|
+struct vc4_dpi_encoder {
|
|
+ struct vc4_encoder base;
|
|
+ struct vc4_dpi *dpi;
|
|
+};
|
|
+
|
|
+static inline struct vc4_dpi_encoder *
|
|
+to_vc4_dpi_encoder(struct drm_encoder *encoder)
|
|
+{
|
|
+ return container_of(encoder, struct vc4_dpi_encoder, base.base);
|
|
+}
|
|
+
|
|
+/* VC4 DPI connector KMS struct */
|
|
+struct vc4_dpi_connector {
|
|
+ struct drm_connector base;
|
|
+ struct vc4_dpi *dpi;
|
|
+
|
|
+ /* Since the connector is attached to just the one encoder,
|
|
+ * this is the reference to it so we can do the best_encoder()
|
|
+ * hook.
|
|
+ */
|
|
+ struct drm_encoder *encoder;
|
|
+};
|
|
+
|
|
+static inline struct vc4_dpi_connector *
|
|
+to_vc4_dpi_connector(struct drm_connector *connector)
|
|
+{
|
|
+ return container_of(connector, struct vc4_dpi_connector, base);
|
|
+}
|
|
+
|
|
+#define DPI_REG(reg) { reg, #reg }
|
|
+static const struct {
|
|
+ u32 reg;
|
|
+ const char *name;
|
|
+} dpi_regs[] = {
|
|
+ DPI_REG(DPI_C),
|
|
+ DPI_REG(DPI_ID),
|
|
+};
|
|
+
|
|
+static void vc4_dpi_dump_regs(struct vc4_dpi *dpi)
|
|
+{
|
|
+ int i;
|
|
+
|
|
+ for (i = 0; i < ARRAY_SIZE(dpi_regs); i++) {
|
|
+ DRM_INFO("0x%04x (%s): 0x%08x\n",
|
|
+ dpi_regs[i].reg, dpi_regs[i].name,
|
|
+ DPI_READ(dpi_regs[i].reg));
|
|
+ }
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_DEBUG_FS
|
|
+int vc4_dpi_debugfs_regs(struct seq_file *m, void *unused)
|
|
+{
|
|
+ struct drm_info_node *node = (struct drm_info_node *)m->private;
|
|
+ struct drm_device *dev = node->minor->dev;
|
|
+ struct vc4_dev *vc4 = to_vc4_dev(dev);
|
|
+ struct vc4_dpi *dpi = vc4->dpi;
|
|
+ int i;
|
|
+
|
|
+ if (!dpi)
|
|
+ return 0;
|
|
+
|
|
+ for (i = 0; i < ARRAY_SIZE(dpi_regs); i++) {
|
|
+ seq_printf(m, "%s (0x%04x): 0x%08x\n",
|
|
+ dpi_regs[i].name, dpi_regs[i].reg,
|
|
+ DPI_READ(dpi_regs[i].reg));
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+#endif
|
|
+
|
|
+static enum drm_connector_status
|
|
+vc4_dpi_connector_detect(struct drm_connector *connector, bool force)
|
|
+{
|
|
+ struct vc4_dpi_connector *vc4_connector =
|
|
+ to_vc4_dpi_connector(connector);
|
|
+ struct vc4_dpi *dpi = vc4_connector->dpi;
|
|
+
|
|
+ if (dpi->panel)
|
|
+ return connector_status_connected;
|
|
+ else
|
|
+ return connector_status_disconnected;
|
|
+}
|
|
+
|
|
+static void vc4_dpi_connector_destroy(struct drm_connector *connector)
|
|
+{
|
|
+ drm_connector_unregister(connector);
|
|
+ drm_connector_cleanup(connector);
|
|
+}
|
|
+
|
|
+static int vc4_dpi_connector_get_modes(struct drm_connector *connector)
|
|
+{
|
|
+ struct vc4_dpi_connector *vc4_connector =
|
|
+ to_vc4_dpi_connector(connector);
|
|
+ struct vc4_dpi *dpi = vc4_connector->dpi;
|
|
+
|
|
+ if (dpi->panel)
|
|
+ return drm_panel_get_modes(dpi->panel);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static struct drm_encoder *
|
|
+vc4_dpi_connector_best_encoder(struct drm_connector *connector)
|
|
+{
|
|
+ struct vc4_dpi_connector *dpi_connector =
|
|
+ to_vc4_dpi_connector(connector);
|
|
+ return dpi_connector->encoder;
|
|
+}
|
|
+
|
|
+static const struct drm_connector_funcs vc4_dpi_connector_funcs = {
|
|
+ .dpms = drm_atomic_helper_connector_dpms,
|
|
+ .detect = vc4_dpi_connector_detect,
|
|
+ .fill_modes = drm_helper_probe_single_connector_modes,
|
|
+ .destroy = vc4_dpi_connector_destroy,
|
|
+ .reset = drm_atomic_helper_connector_reset,
|
|
+ .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
|
|
+ .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
|
|
+};
|
|
+
|
|
+static const struct drm_connector_helper_funcs vc4_dpi_connector_helper_funcs = {
|
|
+ .get_modes = vc4_dpi_connector_get_modes,
|
|
+ .best_encoder = vc4_dpi_connector_best_encoder,
|
|
+};
|
|
+
|
|
+static struct drm_connector *vc4_dpi_connector_init(struct drm_device *dev,
|
|
+ struct vc4_dpi *dpi)
|
|
+{
|
|
+ struct drm_connector *connector = NULL;
|
|
+ struct vc4_dpi_connector *dpi_connector;
|
|
+ int ret = 0;
|
|
+
|
|
+ dpi_connector = devm_kzalloc(dev->dev, sizeof(*dpi_connector),
|
|
+ GFP_KERNEL);
|
|
+ if (!dpi_connector) {
|
|
+ ret = -ENOMEM;
|
|
+ goto fail;
|
|
+ }
|
|
+ connector = &dpi_connector->base;
|
|
+
|
|
+ dpi_connector->encoder = dpi->encoder;
|
|
+ dpi_connector->dpi = dpi;
|
|
+
|
|
+ drm_connector_init(dev, connector, &vc4_dpi_connector_funcs,
|
|
+ DRM_MODE_CONNECTOR_DPI);
|
|
+ drm_connector_helper_add(connector, &vc4_dpi_connector_helper_funcs);
|
|
+
|
|
+ connector->polled = 0;
|
|
+ connector->interlace_allowed = 0;
|
|
+ connector->doublescan_allowed = 0;
|
|
+
|
|
+ drm_mode_connector_attach_encoder(connector, dpi->encoder);
|
|
+
|
|
+ return connector;
|
|
+
|
|
+ fail:
|
|
+ if (connector)
|
|
+ vc4_dpi_connector_destroy(connector);
|
|
+
|
|
+ return ERR_PTR(ret);
|
|
+}
|
|
+
|
|
+static const struct drm_encoder_funcs vc4_dpi_encoder_funcs = {
|
|
+ .destroy = drm_encoder_cleanup,
|
|
+};
|
|
+
|
|
+static void vc4_dpi_encoder_disable(struct drm_encoder *encoder)
|
|
+{
|
|
+ struct vc4_dpi_encoder *vc4_encoder = to_vc4_dpi_encoder(encoder);
|
|
+ struct vc4_dpi *dpi = vc4_encoder->dpi;
|
|
+
|
|
+ drm_panel_disable(dpi->panel);
|
|
+
|
|
+ clk_disable_unprepare(dpi->pixel_clock);
|
|
+
|
|
+ drm_panel_unprepare(dpi->panel);
|
|
+}
|
|
+
|
|
+static void vc4_dpi_encoder_enable(struct drm_encoder *encoder)
|
|
+{
|
|
+ struct drm_display_mode *mode = &encoder->crtc->mode;
|
|
+ struct vc4_dpi_encoder *vc4_encoder = to_vc4_dpi_encoder(encoder);
|
|
+ struct vc4_dpi *dpi = vc4_encoder->dpi;
|
|
+ u32 dpi_c = DPI_ENABLE | DPI_OUTPUT_ENABLE_MODE;
|
|
+ int ret;
|
|
+
|
|
+ ret = drm_panel_prepare(dpi->panel);
|
|
+ if (ret) {
|
|
+ DRM_ERROR("Panel failed to prepare\n");
|
|
+ return;
|
|
+ }
|
|
+
|
|
+ if (dpi->connector->display_info.num_bus_formats) {
|
|
+ u32 bus_format = dpi->connector->display_info.bus_formats[0];
|
|
+
|
|
+ switch (bus_format) {
|
|
+ case MEDIA_BUS_FMT_RGB888_1X24:
|
|
+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB,
|
|
+ DPI_FORMAT);
|
|
+ break;
|
|
+ case MEDIA_BUS_FMT_BGR888_1X24:
|
|
+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB,
|
|
+ DPI_FORMAT);
|
|
+ dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR, DPI_ORDER);
|
|
+ break;
|
|
+ case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
|
|
+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_2,
|
|
+ DPI_FORMAT);
|
|
+ break;
|
|
+ case MEDIA_BUS_FMT_RGB666_1X18:
|
|
+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1,
|
|
+ DPI_FORMAT);
|
|
+ break;
|
|
+ case MEDIA_BUS_FMT_RGB565_1X16:
|
|
+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_3,
|
|
+ DPI_FORMAT);
|
|
+ break;
|
|
+ default:
|
|
+ DRM_ERROR("Unknown media bus format %d\n", bus_format);
|
|
+ break;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
|
|
+ dpi_c |= DPI_HSYNC_INVERT;
|
|
+ else if (!(mode->flags & DRM_MODE_FLAG_PHSYNC))
|
|
+ dpi_c |= DPI_HSYNC_DISABLE;
|
|
+
|
|
+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
|
|
+ dpi_c |= DPI_VSYNC_INVERT;
|
|
+ else if (!(mode->flags & DRM_MODE_FLAG_PVSYNC))
|
|
+ dpi_c |= DPI_VSYNC_DISABLE;
|
|
+
|
|
+ DPI_WRITE(DPI_C, dpi_c);
|
|
+
|
|
+ ret = clk_set_rate(dpi->pixel_clock, mode->clock * 1000);
|
|
+ if (ret)
|
|
+ DRM_ERROR("Failed to set clock rate: %d\n", ret);
|
|
+
|
|
+ ret = clk_prepare_enable(dpi->pixel_clock);
|
|
+ if (ret)
|
|
+ DRM_ERROR("Failed to set clock rate: %d\n", ret);
|
|
+
|
|
+ ret = drm_panel_enable(dpi->panel);
|
|
+ if (ret) {
|
|
+ DRM_ERROR("Panel failed to enable\n");
|
|
+ drm_panel_unprepare(dpi->panel);
|
|
+ return;
|
|
+ }
|
|
+}
|
|
+
|
|
+static const struct drm_encoder_helper_funcs vc4_dpi_encoder_helper_funcs = {
|
|
+ .disable = vc4_dpi_encoder_disable,
|
|
+ .enable = vc4_dpi_encoder_enable,
|
|
+};
|
|
+
|
|
+static const struct of_device_id vc4_dpi_dt_match[] = {
|
|
+ { .compatible = "brcm,bcm2835-dpi", .data = NULL },
|
|
+ {}
|
|
+};
|
|
+
|
|
+/* Walks the OF graph to find the panel node and then asks DRM to look
|
|
+ * up the panel.
|
|
+ */
|
|
+static struct drm_panel *vc4_dpi_get_panel(struct device *dev)
|
|
+{
|
|
+ struct device_node *endpoint, *panel_node;
|
|
+ struct device_node *np = dev->of_node;
|
|
+ struct drm_panel *panel;
|
|
+
|
|
+ endpoint = of_graph_get_next_endpoint(np, NULL);
|
|
+ if (!endpoint) {
|
|
+ dev_err(dev, "no endpoint to fetch DPI panel\n");
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ /* don't proceed if we have an endpoint but no panel_node tied to it */
|
|
+ panel_node = of_graph_get_remote_port_parent(endpoint);
|
|
+ of_node_put(endpoint);
|
|
+ if (!panel_node) {
|
|
+ dev_err(dev, "no valid panel node\n");
|
|
+ return NULL;
|
|
+ }
|
|
+
|
|
+ panel = of_drm_find_panel(panel_node);
|
|
+ of_node_put(panel_node);
|
|
+
|
|
+ return panel;
|
|
+}
|
|
+
|
|
+static int vc4_dpi_bind(struct device *dev, struct device *master, void *data)
|
|
+{
|
|
+ struct platform_device *pdev = to_platform_device(dev);
|
|
+ struct drm_device *drm = dev_get_drvdata(master);
|
|
+ struct vc4_dev *vc4 = to_vc4_dev(drm);
|
|
+ struct vc4_dpi *dpi;
|
|
+ struct vc4_dpi_encoder *vc4_dpi_encoder;
|
|
+ int ret;
|
|
+
|
|
+ dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL);
|
|
+ if (!dpi)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ vc4_dpi_encoder = devm_kzalloc(dev, sizeof(*vc4_dpi_encoder),
|
|
+ GFP_KERNEL);
|
|
+ if (!vc4_dpi_encoder)
|
|
+ return -ENOMEM;
|
|
+ vc4_dpi_encoder->base.type = VC4_ENCODER_TYPE_DPI;
|
|
+ vc4_dpi_encoder->dpi = dpi;
|
|
+ dpi->encoder = &vc4_dpi_encoder->base.base;
|
|
+
|
|
+ dpi->pdev = pdev;
|
|
+ dpi->regs = vc4_ioremap_regs(pdev, 0);
|
|
+ if (IS_ERR(dpi->regs))
|
|
+ return PTR_ERR(dpi->regs);
|
|
+
|
|
+ vc4_dpi_dump_regs(dpi);
|
|
+
|
|
+ if (DPI_READ(DPI_ID) != DPI_ID_VALUE) {
|
|
+ dev_err(dev, "Port returned 0x%08x for ID instead of 0x%08x\n",
|
|
+ DPI_READ(DPI_ID), DPI_ID_VALUE);
|
|
+ return -ENODEV;
|
|
+ }
|
|
+
|
|
+ dpi->core_clock = devm_clk_get(dev, "core");
|
|
+ if (IS_ERR(dpi->core_clock)) {
|
|
+ ret = PTR_ERR(dpi->core_clock);
|
|
+ if (ret != -EPROBE_DEFER)
|
|
+ DRM_ERROR("Failed to get core clock: %d\n", ret);
|
|
+ return ret;
|
|
+ }
|
|
+ dpi->pixel_clock = devm_clk_get(dev, "pixel");
|
|
+ if (IS_ERR(dpi->pixel_clock)) {
|
|
+ ret = PTR_ERR(dpi->pixel_clock);
|
|
+ if (ret != -EPROBE_DEFER)
|
|
+ DRM_ERROR("Failed to get pixel clock: %d\n", ret);
|
|
+ return ret;
|
|
+ }
|
|
+
|
|
+ ret = clk_prepare_enable(dpi->core_clock);
|
|
+ if (ret)
|
|
+ DRM_ERROR("Failed to turn on core clock: %d\n", ret);
|
|
+
|
|
+ dpi->panel = vc4_dpi_get_panel(dev);
|
|
+
|
|
+ drm_encoder_init(drm, dpi->encoder, &vc4_dpi_encoder_funcs,
|
|
+ DRM_MODE_ENCODER_DPI);
|
|
+ drm_encoder_helper_add(dpi->encoder, &vc4_dpi_encoder_helper_funcs);
|
|
+
|
|
+ dpi->connector = vc4_dpi_connector_init(drm, dpi);
|
|
+ if (IS_ERR(dpi->connector)) {
|
|
+ ret = PTR_ERR(dpi->connector);
|
|
+ goto err_destroy_encoder;
|
|
+ }
|
|
+
|
|
+ if (dpi->panel)
|
|
+ drm_panel_attach(dpi->panel, dpi->connector);
|
|
+
|
|
+ dev_set_drvdata(dev, dpi);
|
|
+
|
|
+ vc4->dpi = dpi;
|
|
+
|
|
+ return 0;
|
|
+
|
|
+err_destroy_encoder:
|
|
+ drm_encoder_cleanup(dpi->encoder);
|
|
+ clk_disable_unprepare(dpi->core_clock);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static void vc4_dpi_unbind(struct device *dev, struct device *master,
|
|
+ void *data)
|
|
+{
|
|
+ struct drm_device *drm = dev_get_drvdata(master);
|
|
+ struct vc4_dev *vc4 = to_vc4_dev(drm);
|
|
+ struct vc4_dpi *dpi = dev_get_drvdata(dev);
|
|
+
|
|
+ if (dpi->panel)
|
|
+ drm_panel_detach(dpi->panel);
|
|
+
|
|
+ vc4_dpi_connector_destroy(dpi->connector);
|
|
+ drm_encoder_cleanup(dpi->encoder);
|
|
+
|
|
+ clk_disable_unprepare(dpi->core_clock);
|
|
+
|
|
+ vc4->dpi = NULL;
|
|
+}
|
|
+
|
|
+static const struct component_ops vc4_dpi_ops = {
|
|
+ .bind = vc4_dpi_bind,
|
|
+ .unbind = vc4_dpi_unbind,
|
|
+};
|
|
+
|
|
+static int vc4_dpi_dev_probe(struct platform_device *pdev)
|
|
+{
|
|
+ return component_add(&pdev->dev, &vc4_dpi_ops);
|
|
+}
|
|
+
|
|
+static int vc4_dpi_dev_remove(struct platform_device *pdev)
|
|
+{
|
|
+ component_del(&pdev->dev, &vc4_dpi_ops);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+struct platform_driver vc4_dpi_driver = {
|
|
+ .probe = vc4_dpi_dev_probe,
|
|
+ .remove = vc4_dpi_dev_remove,
|
|
+ .driver = {
|
|
+ .name = "vc4_dpi",
|
|
+ .of_match_table = vc4_dpi_dt_match,
|
|
+ },
|
|
+};
|
|
--- a/drivers/gpu/drm/vc4/vc4_drv.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_drv.c
|
|
@@ -259,6 +259,7 @@ static const struct component_master_ops
|
|
|
|
static struct platform_driver *const component_drivers[] = {
|
|
&vc4_hdmi_driver,
|
|
+ &vc4_dpi_driver,
|
|
&vc4_crtc_driver,
|
|
&vc4_hvs_driver,
|
|
&vc4_v3d_driver,
|
|
--- a/drivers/gpu/drm/vc4/vc4_drv.h
|
|
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
|
|
@@ -16,6 +16,7 @@ struct vc4_dev {
|
|
struct vc4_hvs *hvs;
|
|
struct vc4_crtc *crtc[3];
|
|
struct vc4_v3d *v3d;
|
|
+ struct vc4_dpi *dpi;
|
|
|
|
struct drm_fbdev_cma *fbdev;
|
|
struct rpi_firmware *firmware;
|
|
@@ -418,6 +419,10 @@ void vc4_debugfs_cleanup(struct drm_mino
|
|
/* vc4_drv.c */
|
|
void __iomem *vc4_ioremap_regs(struct platform_device *dev, int index);
|
|
|
|
+/* vc4_dpi.c */
|
|
+extern struct platform_driver vc4_dpi_driver;
|
|
+int vc4_dpi_debugfs_regs(struct seq_file *m, void *unused);
|
|
+
|
|
/* vc4_gem.c */
|
|
void vc4_gem_init(struct drm_device *dev);
|
|
void vc4_gem_destroy(struct drm_device *dev);
|