[PATCH v5 1/7] drm: sunxi: Add a basic DRM driver for Allwinner DE2

Jean-Francois Moine
2016-10-21T07:26:18Z

Allwinner's recent SoCs, as A64, A83T and H3, contain a new display
engine, DE2.
This patch adds a DRM video driver for this device.

Signed-off-by: Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>
---
.../bindings/display/sunxi/sunxi-de2.txt | 83 +++
drivers/gpu/drm/Kconfig | 2 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/sunxi/Kconfig | 21 +
drivers/gpu/drm/sunxi/Makefile | 7 +
drivers/gpu/drm/sunxi/de2_crtc.c | 475 +++++++++++++++++
drivers/gpu/drm/sunxi/de2_crtc.h | 63 +++
drivers/gpu/drm/sunxi/de2_de.c | 591 +++++++++++++++++++++
drivers/gpu/drm/sunxi/de2_drm.h | 47 ++
drivers/gpu/drm/sunxi/de2_drv.c | 378 +++++++++++++
drivers/gpu/drm/sunxi/de2_plane.c | 119 +++++
11 files changed, 1787 insertions(+)
create mode 100644 Documentation/devicetree/bindings/display/sunxi/sunxi-de2.txt
create mode 100644 drivers/gpu/drm/sunxi/Kconfig
create mode 100644 drivers/gpu/drm/sunxi/Makefile
create mode 100644 drivers/gpu/drm/sunxi/de2_crtc.c
create mode 100644 drivers/gpu/drm/sunxi/de2_crtc.h
create mode 100644 drivers/gpu/drm/sunxi/de2_de.c
create mode 100644 drivers/gpu/drm/sunxi/de2_drm.h
create mode 100644 drivers/gpu/drm/sunxi/de2_drv.c
create mode 100644 drivers/gpu/drm/sunxi/de2_plane.c

diff --git a/Documentation/devicetree/bindings/display/sunxi/sunxi-de2.txt b/Documentation/devicetree/bindings/display/sunxi/sunxi-de2.txt
new file mode 100644
index 0000000..f9cd67a
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/sunxi/sunxi-de2.txt
@@ -0,0 +1,83 @@
+Allwinner sunxi Display Engine 2 subsystem
+==========================================
+
+The sunxi DE2 subsystem contains a display controller (DE2),
+one or two LCD controllers (TCON) and their external interfaces.
+
+Display controller
+==================
+
+Required properties:
+
+- compatible: value should be one of the following
+ "allwinner,sun8i-a83t-display-engine"
+ "allwinner,sun8i-h3-display-engine"
+
+- clocks: must include clock specifiers corresponding to entries in the
+ clock-names property.
+
+- clock-names: must contain
+ "gate": for DE activation
+ "clock": DE clock
+
+- resets: phandle to the reset of the device
+
+- ports: phandle's to the LCD ports
+
+LCD controller
+==============
+
+Required properties:
+
+- compatible: value should be one of the following
+ "allwinner,sun8i-a83t-lcd"
+
+- clocks: must include clock specifiers corresponding to entries in the
+ clock-names property.
+
+- clock-names: must contain
+ "gate": for LCD activation
+ "clock": pixel clock
+
+- resets: phandle to the reset of the device
+
+- port: port node with endpoint definitions as defined in
+ Documentation/devicetree/bindings/media/video-interfaces.txt
+
+Example:
+
+ de: de-controller@01000000 {
+ compatible = "allwinner,sun8i-h3-display-engine";
+ ...
+ clocks = <&&ccu CLK_BUS_DE>, <&ccu CLK_DE>;
+ clock-names = "gate", "clock";
+ resets = <&ccu RST_BUS_DE>;
+ ports = <&lcd0_p>;
+ };
+
+ lcd0: lcd-controller@01c0c000 {
+ compatible = "allwinner,sun8i-a83t-lcd";
+ ...
+ clocks = <&ccu CLK_BUS_TCON0>, <&ccu CLK_TCON0>;
+ clock-names = "gate", "clock";
+ resets = <&ccu RST_BUS_TCON0>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ lcd0_p: port {
+ lcd0_ep: endpoint {
+ remote-endpoint = <&hdmi_ep>;
+ };
+ };
+ };
+
+ hdmi: hdmi@01ee0000 {
+ ...
+ #address-cells = <1>;
+ #size-cells = <0>;
+ port {
+ type = "video";
+ hdmi_ep: endpoint {
+ remote-endpoint = <&lcd0_ep>;
+ };
+ };
+ };
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index 483059a..afd576f 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -187,6 +187,8 @@ source "drivers/gpu/drm/shmobile/Kconfig"

source "drivers/gpu/drm/sun4i/Kconfig"

+source "drivers/gpu/drm/sunxi/Kconfig"
+
source "drivers/gpu/drm/omapdrm/Kconfig"

source "drivers/gpu/drm/tilcdc/Kconfig"
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 25c7204..120d0bf 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_DRM_RCAR_DU) += rcar-du/
obj-$(CONFIG_DRM_SHMOBILE) +=shmobile/
obj-y += omapdrm/
obj-$(CONFIG_DRM_SUN4I) += sun4i/
+obj-$(CONFIG_DRM_SUNXI) += sunxi/
obj-y += tilcdc/
obj-$(CONFIG_DRM_QXL) += qxl/
obj-$(CONFIG_DRM_BOCHS) += bochs/
diff --git a/drivers/gpu/drm/sunxi/Kconfig b/drivers/gpu/drm/sunxi/Kconfig
new file mode 100644
index 0000000..56bde2e
--- /dev/null
+++ b/drivers/gpu/drm/sunxi/Kconfig
@@ -0,0 +1,21 @@
+#
+# Allwinner Video configuration
+#
+
+config DRM_SUNXI
+ tristate "DRM Support for Allwinner Video"
+ depends on DRM && OF
+ depends on ARCH_SUNXI || COMPILE_TEST
+ select DRM_KMS_HELPER
+ select DRM_KMS_CMA_HELPER
+ select DRM_GEM_CMA_HELPER
+ help
+ Choose this option if you have a Allwinner chipset.
+
+config DRM_SUNXI_DE2
+ tristate "Support for Allwinner Video with DE2 interface"
+ depends on DRM_SUNXI
+ help
+ Choose this option if your Allwinner chipset has the DE2 interface
+ as the A64, A83T and H3. If M is selected the module will be called
+ sunxi-de2-drm.
diff --git a/drivers/gpu/drm/sunxi/Makefile b/drivers/gpu/drm/sunxi/Makefile
new file mode 100644
index 0000000..62220cb
--- /dev/null
+++ b/drivers/gpu/drm/sunxi/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for Allwinner's sun8i DRM device driver
+#
+
+sunxi-de2-drm-objs := de2_drv.o de2_de.o de2_crtc.o de2_plane.o
+
+obj-$(CONFIG_DRM_SUNXI_DE2) += sunxi-de2-drm.o
diff --git a/drivers/gpu/drm/sunxi/de2_crtc.c b/drivers/gpu/drm/sunxi/de2_crtc.c
new file mode 100644
index 0000000..dae0fab
--- /dev/null
+++ b/drivers/gpu/drm/sunxi/de2_crtc.c
@@ -0,0 +1,475 @@
+/*
+ * Allwinner DRM driver - DE2 CRTC
+ *
+ * Copyright (C) 2016 Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/component.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_atomic_helper.h>
+#include <asm/io.h>
+#include <linux/of_irq.h>
+
+#include "de2_drm.h"
+#include "de2_crtc.h"
+
+/* I/O map */
+
+struct tcon {
+ u32 gctl;
+#define TCON_GCTL_TCON_En BIT(31)
+ u32 gint0;
+#define TCON_GINT0_TCON1_Vb_Int_En BIT(30)
+#define TCON_GINT0_TCON1_Vb_Int_Flag BIT(14)
+ u32 gint1;
+ u32 dum0[13];
+ u32 tcon0_ctl; /* 0x40 */
+#define TCON0_CTL_TCON_En BIT(31)
+ u32 dum1[19];
+ u32 tcon1_ctl; /* 0x90 */
+#define TCON1_CTL_TCON_En BIT(31)
+#define TCON1_CTL_Interlace_En BIT(20)
+#define TCON1_CTL_Start_Delay_SHIFT 4
+#define TCON1_CTL_Start_Delay_MASK GENMASK(8, 4)
+ u32 basic0; /* XI/YI */
+ u32 basic1; /* LS_XO/LS_YO */
+ u32 basic2; /* XO/YO */
+ u32 basic3; /* HT/HBP */
+ u32 basic4; /* VT/VBP */
+ u32 basic5; /* HSPW/VSPW */
+ u32 dum2;
+ u32 ps_sync; /* 0xb0 */
+ u32 dum3[15];
+ u32 io_pol; /* 0xf0 */
+#define TCON1_IO_POL_IO0_inv BIT(24)
+#define TCON1_IO_POL_IO1_inv BIT(25)
+#define TCON1_IO_POL_IO2_inv BIT(26)
+ u32 io_tri;
+ u32 dum4[2];
+
+ u32 ceu_ctl; /* 0x100 */
+#define TCON_CEU_CTL_ceu_en BIT(31)
+ u32 dum5[3];
+ u32 ceu_rr;
+ u32 ceu_rg;
+ u32 ceu_rb;
+ u32 ceu_rc;
+ u32 ceu_gr;
+ u32 ceu_gg;
+ u32 ceu_gb;
+ u32 ceu_gc;
+ u32 ceu_br;
+ u32 ceu_bg;
+ u32 ceu_bb;
+ u32 ceu_bc;
+ u32 ceu_rv;
+ u32 ceu_gv;
+ u32 ceu_bv;
+ u32 dum6[45];
+
+ u32 mux_ctl; /* 0x200 */
+ u32 dum7[63];
+
+ u32 fill_ctl; /* 0x300 */
+ u32 fill_start0;
+ u32 fill_end0;
+ u32 fill_data0;
+};
+
+#define XY(x, y) (((x) << 16) | (y))
+
+#define tcon_read(base, member) \
+ readl_relaxed(base + offsetof(struct tcon, member))
+#define tcon_write(base, member, data) \
+ writel_relaxed(data, base + offsetof(struct tcon, member))
+
+/* vertical blank functions */
+static void de2_atomic_flush(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_state)
+{
+ struct drm_pending_vblank_event *event = crtc->state->event;
+
+ if (event) {
+ crtc->state->event = NULL;
+ spin_lock_irq(&crtc->dev->event_lock);
+ if (drm_crtc_vblank_get(crtc) == 0)
+ drm_crtc_arm_vblank_event(crtc, event);
+ else
+ drm_crtc_send_vblank_event(crtc, event);
+ spin_unlock_irq(&crtc->dev->event_lock);
+ }
+}
+
+static irqreturn_t de2_lcd_irq(int irq, void *dev_id)
+{
+ struct lcd *lcd = (struct lcd *) dev_id;
+ u32 isr;
+
+ isr = tcon_read(lcd->mmio, gint0);
+
+ drm_crtc_handle_vblank(&lcd->crtc);
+
+ tcon_write(lcd->mmio, gint0, isr & ~TCON_GINT0_TCON1_Vb_Int_Flag);
+
+ return IRQ_HANDLED;
+}
+
+int de2_enable_vblank(struct drm_device *drm, unsigned crtc)
+{
+ struct priv *priv = drm->dev_private;
+ struct lcd *lcd = priv->lcds[crtc];
+
+ tcon_write(lcd->mmio, gint0,
+ tcon_read(lcd->mmio, gint0) |
+ TCON_GINT0_TCON1_Vb_Int_En);
+ return 0;
+}
+
+void de2_disable_vblank(struct drm_device *drm, unsigned crtc)
+{
+ struct priv *priv = drm->dev_private;
+ struct lcd *lcd = priv->lcds[crtc];
+
+ tcon_write(lcd->mmio, gint0,
+ tcon_read(lcd->mmio, gint0) &
+ ~TCON_GINT0_TCON1_Vb_Int_En);
+}
+
+/* panel functions */
+static void de2_set_frame_timings(struct lcd *lcd)
+{
+ struct drm_crtc *crtc = &lcd->crtc;
+ const struct drm_display_mode *mode = &crtc->mode;
+ int interlace = mode->flags & DRM_MODE_FLAG_INTERLACE ? 2 : 1;
+ int start_delay;
+ u32 data;
+
+ data = XY(mode->hdisplay - 1, mode->vdisplay / interlace - 1);
+ tcon_write(lcd->mmio, basic0, data);
+ tcon_write(lcd->mmio, basic1, data);
+ tcon_write(lcd->mmio, basic2, data);
+ tcon_write(lcd->mmio, basic3,
+ XY(mode->htotal - 1,
+ mode->htotal - mode->hsync_start - 1));
+ tcon_write(lcd->mmio, basic4,
+ XY(mode->vtotal * (3 - interlace),
+ mode->vtotal - mode->vsync_start - 1));
+ tcon_write(lcd->mmio, basic5,
+ XY(mode->hsync_end - mode->hsync_start - 1,
+ mode->vsync_end - mode->vsync_start - 1));
+
+ tcon_write(lcd->mmio, ps_sync, XY(1, 1));
+
+ data = TCON1_IO_POL_IO2_inv;
+ if (mode->flags & DRM_MODE_FLAG_PVSYNC)
+ data |= TCON1_IO_POL_IO0_inv;
+ if (mode->flags & DRM_MODE_FLAG_PHSYNC)
+ data |= TCON1_IO_POL_IO1_inv;
+ tcon_write(lcd->mmio, io_pol, data);
+
+ tcon_write(lcd->mmio, ceu_ctl,
+ tcon_read(lcd->mmio, ceu_ctl) & ~TCON_CEU_CTL_ceu_en);
+
+ data = tcon_read(lcd->mmio, tcon1_ctl);
+ if (interlace == 2)
+ data |= TCON1_CTL_Interlace_En;
+ else
+ data &= ~TCON1_CTL_Interlace_En;
+ tcon_write(lcd->mmio, tcon1_ctl, data);
+
+ tcon_write(lcd->mmio, fill_ctl, 0);
+ tcon_write(lcd->mmio, fill_start0, mode->vtotal + 1);
+ tcon_write(lcd->mmio, fill_end0, mode->vtotal);
+ tcon_write(lcd->mmio, fill_data0, 0);
+
+ start_delay = (mode->vtotal - mode->vdisplay) / interlace - 5;
+ if (start_delay > 31)
+ start_delay = 31;
+ data = tcon_read(lcd->mmio, tcon1_ctl);
+ data &= ~TCON1_CTL_Start_Delay_MASK;
+ data |= start_delay << TCON1_CTL_Start_Delay_SHIFT;
+ tcon_write(lcd->mmio, tcon1_ctl, data);
+
+ tcon_write(lcd->mmio, io_tri, 0x0fffffff);
+}
+
+static void de2_crtc_enable(struct drm_crtc *crtc)
+{
+ struct lcd *lcd = crtc_to_lcd(crtc);
+ struct drm_display_mode *mode = &crtc->mode;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ clk_set_rate(lcd->clk, mode->clock * 1000);
+
+ de2_set_frame_timings(lcd);
+
+ tcon_write(lcd->mmio, tcon1_ctl,
+ tcon_read(lcd->mmio, tcon1_ctl) | TCON1_CTL_TCON_En);
+
+ de2_de_panel_init(lcd->priv, lcd->num, mode);
+
+ drm_mode_debug_printmodeline(mode);
+}
+
+static void de2_crtc_disable(struct drm_crtc *crtc)
+{
+ struct lcd *lcd = crtc_to_lcd(crtc);
+ unsigned long flags;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ tcon_write(lcd->mmio, tcon1_ctl,
+ tcon_read(lcd->mmio, tcon1_ctl) & ~TCON1_CTL_TCON_En);
+
+ if (crtc->state->event && !crtc->state->active) {
+ spin_lock_irqsave(&crtc->dev->event_lock, flags);
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
+ spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
+ crtc->state->event = NULL;
+ }
+}
+
+static const struct drm_crtc_funcs de2_crtc_funcs = {
+ .destroy = drm_crtc_cleanup,
+ .set_config = drm_atomic_helper_set_config,
+ .page_flip = drm_atomic_helper_page_flip,
+ .reset = drm_atomic_helper_crtc_reset,
+ .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
+};
+
+static const struct drm_crtc_helper_funcs de2_crtc_helper_funcs = {
+ .atomic_flush = de2_atomic_flush,
+ .enable = de2_crtc_enable,
+ .disable = de2_crtc_disable,
+};
+
+static void de2_tcon_init(struct lcd *lcd)
+{
+ tcon_write(lcd->mmio, tcon0_ctl,
+ tcon_read(lcd->mmio, tcon0_ctl) & ~TCON0_CTL_TCON_En);
+ tcon_write(lcd->mmio, tcon1_ctl,
+ tcon_read(lcd->mmio, tcon1_ctl) & ~TCON1_CTL_TCON_En);
+ tcon_write(lcd->mmio, gctl,
+ tcon_read(lcd->mmio, gctl) & ~TCON_GCTL_TCON_En);
+
+ /* disable/ack interrupts */
+ tcon_write(lcd->mmio, gint0, 0);
+}
+
+static void de2_tcon_enable(struct lcd *lcd)
+{
+ tcon_write(lcd->mmio, gctl,
+ tcon_read(lcd->mmio, gctl) | TCON_GCTL_TCON_En);
+}
+
+static int de2_crtc_init(struct drm_device *drm, struct lcd *lcd)
+{
+ struct drm_crtc *crtc = &lcd->crtc;
+ int ret;
+
+ ret = de2_plane_init(drm, lcd);
+ if (ret < 0)
+ return ret;
+
+ drm_crtc_helper_add(crtc, &de2_crtc_helper_funcs);
+
+ ret = drm_crtc_init_with_planes(drm, crtc,
+ &lcd->planes[DE2_PRIMARY_PLANE],
+ &lcd->planes[DE2_CURSOR_PLANE],
+ &de2_crtc_funcs, NULL);
+ if (ret < 0)
+ return ret;
+
+ de2_tcon_enable(lcd);
+
+ de2_de_enable(lcd->priv, lcd->num);
+
+ return 0;
+}
+
+/*
+ * device init
+ */
+static int de2_lcd_bind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct drm_device *drm = data;
+ struct priv *priv = drm->dev_private;
+ struct lcd *lcd = dev_get_drvdata(dev);
+ int ret;
+
+ lcd->priv = priv;
+
+ /* (only 2 LCDs) */
+ lcd->crtc_idx = priv->lcds[0] ? 1 : 0;
+ priv->lcds[lcd->crtc_idx] = lcd;
+
+ ret = de2_crtc_init(drm, lcd);
+ if (ret < 0) {
+ dev_err(dev, "failed to init the crtc\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static void de2_lcd_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct lcd *lcd = platform_get_drvdata(pdev);
+
+ if (lcd->mmio) {
+ if (lcd->priv)
+ de2_de_disable(lcd->priv, lcd->num);
+ tcon_write(lcd->mmio, gctl,
+ tcon_read(lcd->mmio, gctl) & ~TCON_GCTL_TCON_En);
+ }
+}
+
+static const struct component_ops de2_lcd_ops = {
+ .bind = de2_lcd_bind,
+ .unbind = de2_lcd_unbind,
+};
+
+static int de2_lcd_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np = dev->of_node, *tmp, *parent, *port;
+ struct lcd *lcd;
+ struct resource *res;
+ int id, irq, ret;
+
+ id = of_alias_get_id(np, "lcd");
+ if (id < 0) {
+ dev_err(dev, "no alias for lcd\n");
+ id = 0;
+ }
+ lcd = devm_kzalloc(dev, sizeof *lcd, GFP_KERNEL);
+ if (!lcd) {
+ dev_err(dev, "failed to allocate private data\n");
+ return -ENOMEM;
+ }
+ dev_set_drvdata(dev, lcd);
+ lcd->dev = dev;
+ lcd->num = id;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "failed to get memory resource\n");
+ return -EINVAL;
+ }
+
+ lcd->mmio = devm_ioremap_resource(dev, res);
+ if (IS_ERR(lcd->mmio)) {
+ dev_err(dev, "failed to map registers\n");
+ return PTR_ERR(lcd->mmio);
+ }
+
+ snprintf(lcd->name, sizeof(lcd->name), "sunxi-lcd%d", id);
+
+ /* possible CRTCs */
+ parent = np;
+ tmp = of_get_child_by_name(np, "ports");
+ if (tmp)
+ parent = tmp;
+ port = of_get_child_by_name(parent, "port");
+ of_node_put(tmp);
+ if (!port) {
+ dev_err(dev, "no port node\n");
+ return -ENXIO;
+ }
+ lcd->crtc.port = port;
+
+ lcd->gate = devm_clk_get(dev, "gate"); /* optional */
+
+ lcd->clk = devm_clk_get(dev, "clock");
+ if (IS_ERR(lcd->clk)) {
+ dev_err(dev, "video clock err %d\n", (int) PTR_ERR(lcd->clk));
+ ret = PTR_ERR(lcd->clk);
+ goto err;
+ }
+
+ lcd->rstc = devm_reset_control_get_optional(dev, NULL);
+
+ irq = irq_of_parse_and_map(np, 0);
+ if (irq <= 0 || irq == NO_IRQ) {
+ dev_err(dev, "unable to get irq lcd %d\n", id);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ if (!IS_ERR(lcd->rstc)) {
+ ret = reset_control_deassert(lcd->rstc);
+ if (ret) {
+ dev_err(dev, "reset deassert err %d\n", ret);
+ goto err;
+ }
+ }
+
+ if (!IS_ERR(lcd->gate)) {
+ ret = clk_prepare_enable(lcd->gate);
+ if (ret)
+ goto err2;
+ }
+
+ ret = clk_prepare_enable(lcd->clk);
+ if (ret)
+ goto err2;
+
+ de2_tcon_init(lcd);
+
+ ret = devm_request_irq(dev, irq, de2_lcd_irq, 0,
+ lcd->name, lcd);
+ if (ret < 0) {
+ dev_err(dev, "unable to request irq %d\n", irq);
+ goto err2;
+ }
+
+ return component_add(dev, &de2_lcd_ops);
+
+err2:
+ if (!IS_ERR_OR_NULL(lcd->rstc))
+ reset_control_assert(lcd->rstc);
+ clk_disable_unprepare(lcd->gate);
+ clk_disable_unprepare(lcd->clk);
+err:
+ of_node_put(lcd->crtc.port);
+ return ret;
+}
+
+static int de2_lcd_remove(struct platform_device *pdev)
+{
+ struct lcd *lcd = platform_get_drvdata(pdev);
+
+ component_del(&pdev->dev, &de2_lcd_ops);
+
+ if (!IS_ERR_OR_NULL(lcd->rstc))
+ reset_control_assert(lcd->rstc);
+ clk_disable_unprepare(lcd->gate);
+ clk_disable_unprepare(lcd->clk);
+ of_node_put(lcd->crtc.port);
+
+ return 0;
+}
+
+static const struct of_device_id de2_lcd_ids[] = {
+ { .compatible = "allwinner,sun8i-a83t-lcd", },
+ { }
+};
+
+struct platform_driver de2_lcd_platform_driver = {
+ .probe = de2_lcd_probe,
+ .remove = de2_lcd_remove,
+ .driver = {
+ .name = "sunxi-de2-lcd",
+ .of_match_table = of_match_ptr(de2_lcd_ids),
+ },
+};
diff --git a/drivers/gpu/drm/sunxi/de2_crtc.h b/drivers/gpu/drm/sunxi/de2_crtc.h
new file mode 100644
index 0000000..efbe45d
--- /dev/null
+++ b/drivers/gpu/drm/sunxi/de2_crtc.h
@@ -0,0 +1,63 @@
+#ifndef __DE2_CRTC_H__
+#define __DE2_CRTC_H__
+/*
+ * Copyright (C) 2016 Jean-François Moine
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/reset.h>
+#include <drm/drm_plane_helper.h>
+
+struct priv;
+
+enum de2_plane2 {
+ DE2_PRIMARY_PLANE,
+ DE2_CURSOR_PLANE,
+ DE2_VI_PLANE,
+ DE2_N_PLANES,
+};
+struct lcd {
+ void __iomem *mmio;
+
+ struct device *dev;
+ struct drm_crtc crtc;
+ struct priv *priv; /* DRM/DE private data */
+
+ short num; /* LCD number in hardware */
+ short crtc_idx; /* CRTC index in drm */
+
+ struct clk *clk;
+ struct clk *gate;
+ struct reset_control *rstc;
+
+ char name[16];
+
+ struct drm_pending_vblank_event *event;
+
+ struct drm_plane planes[DE2_N_PLANES];
+};
+
+#define crtc_to_lcd(x) container_of(x, struct lcd, crtc)
+
+/* in de2_de.c */
+void de2_de_enable(struct priv *priv, int lcd_num);
+void de2_de_disable(struct priv *priv, int lcd_num);
+void de2_de_hw_init(struct priv *priv, int lcd_num);
+void de2_de_panel_init(struct priv *priv, int lcd_num,
+ struct drm_display_mode *mode);
+void de2_de_plane_disable(struct priv *priv,
+ int lcd_num, int plane_ix);
+void de2_de_plane_update(struct priv *priv,
+ int lcd_num, int plane_ix,
+ struct drm_plane_state *state,
+ struct drm_plane_state *old_state);
+
+/* in de2_plane.c */
+int de2_plane_init(struct drm_device *drm, struct lcd *lcd);
+
+#endif /* __DE2_CRTC_H__ */
diff --git a/drivers/gpu/drm/sunxi/de2_de.c b/drivers/gpu/drm/sunxi/de2_de.c
new file mode 100644
index 0000000..0d8cb62
--- /dev/null
+++ b/drivers/gpu/drm/sunxi/de2_de.c
@@ -0,0 +1,591 @@
+/*
+ * ALLWINNER DRM driver - Display Engine 2
+ *
+ * Copyright (C) 2016 Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>
+ * Copyright (c) 2016 Allwinnertech Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <asm/io.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include "de2_drm.h"
+#include "de2_crtc.h"
+
+static DEFINE_SPINLOCK(de_lock);
+
+#define DE_CLK_RATE_A83T 504000000 /* pll-de */
+#define DE_CLK_RATE_H3 432000000 /* de */
+
+/* I/O map */
+
+#define DE_MOD_REG 0x0000 /* 1 bit per LCD */
+#define DE_GATE_REG 0x0004
+#define DE_RESET_REG 0x0008
+#define DE_DIV_REG 0x000c /* 4 bits per LCD */
+#define DE_SEL_REG 0x0010
+
+#define DE_MUX0_BASE 0x00100000
+#define DE_MUX1_BASE 0x00200000
+
+/* MUX registers (addr / MUX base) */
+#define DE_MUX_GLB_REGS 0x00000 /* global control */
+#define DE_MUX_BLD_REGS 0x01000 /* alpha blending */
+#define DE_MUX_CHAN_REGS 0x02000 /* VI/UI overlay channels */
+#define DE_MUX_CHAN_SZ 0x1000 /* size of a channel */
+#define DE_MUX_VSU_REGS 0x20000 /* VSU */
+#define DE_MUX_GSU1_REGS 0x30000 /* GSUs */
+#define DE_MUX_GSU2_REGS 0x40000
+#define DE_MUX_GSU3_REGS 0x50000
+#define DE_MUX_FCE_REGS 0xa0000 /* FCE */
+#define DE_MUX_BWS_REGS 0xa2000 /* BWS */
+#define DE_MUX_LTI_REGS 0xa4000 /* LTI */
+#define DE_MUX_PEAK_REGS 0xa6000 /* PEAK */
+#define DE_MUX_ASE_REGS 0xa8000 /* ASE */
+#define DE_MUX_FCC_REGS 0xaa000 /* FCC */
+#define DE_MUX_DCSC_REGS 0xb0000 /* DCSC/SMBL */
+
+/* global control */
+struct de_glb {
+ u32 ctl;
+#define DE_MUX_GLB_CTL_rt_en BIT(0)
+#define DE_MUX_GLB_CTL_finish_irq_en BIT(4)
+#define DE_MUX_GLB_CTL_rtwb_port BIT(12)
+ u32 status;
+ u32 dbuff;
+ u32 size;
+};
+
+/* alpha blending */
+struct de_bld {
+ u32 fcolor_ctl; /* 00 */
+ struct {
+ u32 fcolor;
+ u32 insize;
+ u32 offset;
+ u32 dum;
+ } attr[4];
+ u32 dum0[15]; /* (end of clear offset) */
+ u32 route; /* 80 */
+ u32 premultiply;
+ u32 bkcolor;
+ u32 output_size;
+ u32 bld_mode[4];
+ u32 dum1[4];
+ u32 ck_ctl; /* b0 */
+ u32 ck_cfg;
+ u32 dum2[2];
+ u32 ck_max[4]; /* c0 */
+ u32 dum3[4];
+ u32 ck_min[4]; /* e0 */
+ u32 dum4[3];
+ u32 out_ctl; /* fc */
+};
+
+/* VI channel */
+struct de_vi {
+ struct {
+ u32 attr;
+#define VI_CFG_ATTR_en BIT(0)
+#define VI_CFG_ATTR_fcolor_en BIT(4)
+#define VI_CFG_ATTR_fmt_SHIFT 8
+#define VI_CFG_ATTR_fmt_MASK GENMASK(12, 8)
+#define VI_CFG_ATTR_ui_sel BIT(15)
+#define VI_CFG_ATTR_top_down BIT(23)
+ u32 size;
+ u32 coord;
+#define VI_N_PLANES 3
+ u32 pitch[VI_N_PLANES];
+ u32 top_laddr[VI_N_PLANES];
+ u32 bot_laddr[VI_N_PLANES];
+ } cfg[4];
+ u32 fcolor[4]; /* c0 */
+ u32 top_haddr[VI_N_PLANES]; /* d0 */
+ u32 bot_haddr[VI_N_PLANES]; /* dc */
+ u32 ovl_size[2]; /* e8 */
+ u32 hori[2]; /* f0 */
+ u32 vert[2]; /* f8 */
+};
+
+/* UI channel */
+struct de_ui {
+ struct {
+ u32 attr;
+#define UI_CFG_ATTR_en BIT(0)
+#define UI_CFG_ATTR_alpmod_SHIFT 1
+#define UI_CFG_ATTR_alpmod_MASK GENMASK(2, 1)
+#define UI_CFG_ATTR_fcolor_en BIT(4)
+#define UI_CFG_ATTR_fmt_SHIFT 8
+#define UI_CFG_ATTR_fmt_MASK GENMASK(12, 8)
+#define UI_CFG_ATTR_top_down BIT(23)
+#define UI_CFG_ATTR_alpha_SHIFT 24
+#define UI_CFG_ATTR_alpha_MASK GENMASK(31, 24)
+ u32 size;
+ u32 coord;
+ u32 pitch;
+ u32 top_laddr;
+ u32 bot_laddr;
+ u32 fcolor;
+ u32 dum;
+ } cfg[4]; /* 00 */
+ u32 top_haddr; /* 80 */
+ u32 bot_haddr;
+ u32 ovl_size; /* 88 */
+};
+
+/* coordinates and sizes */
+#define XY(x, y) (((y) << 16) | (x))
+#define WH(w, h) (((h - 1) << 16) | (w - 1))
+
+/* UI video formats */
+#define DE2_FORMAT_ARGB_8888 0
+#define DE2_FORMAT_BGRA_8888 3
+#define DE2_FORMAT_XRGB_8888 4
+#define DE2_FORMAT_RGB_888 8
+#define DE2_FORMAT_BGR_888 9
+
+/* VI video formats */
+#define DE2_FORMAT_YUV422_I_YVYU 1 /* Y-V-Y-U */
+#define DE2_FORMAT_YUV422_I_UYVY 2 /* U-Y-V-Y */
+#define DE2_FORMAT_YUV422_I_YUYV 3 /* Y-U-Y-V */
+#define DE2_FORMAT_YUV422_P 6 /* YYYY UU VV planar */
+#define DE2_FORMAT_YUV420_P 10 /* YYYY U V planar */
+
+#define glb_read(base, member) \
+ readl_relaxed(base + offsetof(struct de_glb, member))
+#define glb_write(base, member, data) \
+ writel_relaxed(data, base + offsetof(struct de_glb, member))
+#define bld_read(base, member) \
+ readl_relaxed(base + offsetof(struct de_bld, member))
+#define bld_write(base, member, data) \
+ writel_relaxed(data, base + offsetof(struct de_bld, member))
+#define ui_read(base, member) \
+ readl_relaxed(base + offsetof(struct de_ui, member))
+#define ui_write(base, member, data) \
+ writel_relaxed(data, base + offsetof(struct de_ui, member))
+#define vi_read(base, member) \
+ readl_relaxed(base + offsetof(struct de_vi, member))
+#define vi_write(base, member, data) \
+ writel_relaxed(data, base + offsetof(struct de_vi, member))
+
+static const struct {
+ char chan;
+ char layer;
+ char pipe;
+} plane2layer[DE2_N_PLANES] = {
+ [DE2_PRIMARY_PLANE] = {0, 0, 0},
+ [DE2_CURSOR_PLANE] = {1, 0, 1},
+ [DE2_VI_PLANE] = {0, 1, 0},
+};
+
+static inline void de_write(struct priv *priv, int reg, u32 data)
+{
+ writel_relaxed(data, priv->mmio + reg);
+}
+
+static inline u32 de_read(struct priv *priv, int reg)
+{
+ return readl_relaxed(priv->mmio + reg);
+}
+
+static void de_lcd_select(struct priv *priv,
+ int lcd_num,
+ void __iomem *mux_o)
+{
+ u32 data;
+
+ /* select the LCD */
+ data = de_read(priv, DE_SEL_REG);
+ data &= ~1;
+ de_write(priv, DE_SEL_REG, data);
+
+ /* double register switch */
+ glb_write(mux_o + DE_MUX_GLB_REGS, dbuff, 1);
+}
+
+void de2_de_plane_update(struct priv *priv,
+ int lcd_num, int plane_ix,
+ struct drm_plane_state *state,
+ struct drm_plane_state *old_state)
+{
+ struct drm_framebuffer *fb = state->fb;
+ struct drm_gem_cma_object *gem;
+ void __iomem *mux_o = priv->mmio;
+ void __iomem *chan_o;
+ u32 size = WH(state->crtc_w, state->crtc_h);
+ u32 coord;
+ u32 screen_size;
+ u32 data, fcolor;
+ u32 ui_sel, alpha_glob;
+ int chan, layer, x, y;
+ unsigned fmt;
+ unsigned long flags;
+
+ chan = plane2layer[plane_ix].chan;
+ layer = plane2layer[plane_ix].layer;
+
+ mux_o += (lcd_num == 0) ? DE_MUX0_BASE : DE_MUX1_BASE;
+ chan_o = mux_o;
+ chan_o += DE_MUX_CHAN_REGS + DE_MUX_CHAN_SZ * chan;
+
+ x = state->crtc_x >= 0 ? state->crtc_x : 0;
+ y = state->crtc_y >= 0 ? state->crtc_y : 0;
+ coord = XY(x, y);
+
+ /* handle the cursor move */
+ if (plane_ix == DE2_CURSOR_PLANE
+ && fb == old_state->fb) {
+ spin_lock_irqsave(&de_lock, flags);
+ de_lcd_select(priv, lcd_num, mux_o);
+ if (chan == 0)
+ vi_write(chan_o, cfg[layer].coord, coord);
+ else
+ ui_write(chan_o, cfg[layer].coord, coord);
+ spin_unlock_irqrestore(&de_lock, flags);
+ return;
+ }
+
+ gem = drm_fb_cma_get_gem_obj(fb, 0);
+
+ ui_sel = alpha_glob = 0;
+ switch (fb->pixel_format) {
+ case DRM_FORMAT_ARGB8888:
+ fmt = DE2_FORMAT_ARGB_8888;
+ ui_sel = VI_CFG_ATTR_ui_sel;
+ break;
+ case DRM_FORMAT_BGRA8888:
+ fmt = DE2_FORMAT_BGRA_8888;
+ ui_sel = VI_CFG_ATTR_ui_sel;
+ break;
+ case DRM_FORMAT_XRGB8888:
+ fmt = DE2_FORMAT_XRGB_8888;
+ ui_sel = VI_CFG_ATTR_ui_sel;
+ alpha_glob = (1 << UI_CFG_ATTR_alpmod_SHIFT) |
+ (0xff << UI_CFG_ATTR_alpha_SHIFT);
+ break;
+ case DRM_FORMAT_RGB888:
+ fmt = DE2_FORMAT_RGB_888;
+ ui_sel = VI_CFG_ATTR_ui_sel;
+ break;
+ case DRM_FORMAT_BGR888:
+ fmt = DE2_FORMAT_BGR_888;
+ ui_sel = VI_CFG_ATTR_ui_sel;
+ break;
+ case DRM_FORMAT_YUYV:
+ fmt = DE2_FORMAT_YUV422_I_YUYV;
+ break;
+ case DRM_FORMAT_YVYU:
+ fmt = DE2_FORMAT_YUV422_I_YVYU;
+ break;
+ case DRM_FORMAT_YUV422:
+ fmt = DE2_FORMAT_YUV422_P;
+ break;
+ case DRM_FORMAT_YUV420:
+ fmt = DE2_FORMAT_YUV420_P;
+ break;
+ case DRM_FORMAT_UYVY:
+ fmt = DE2_FORMAT_YUV422_I_UYVY;
+ break;
+ default:
+ pr_err("format %.4s not yet treated\n",
+ (char *) &fb->pixel_format);
+ return;
+ }
+
+ spin_lock_irqsave(&de_lock, flags);
+
+ screen_size = plane_ix == DE2_PRIMARY_PLANE ?
+ size :
+ glb_read(mux_o + DE_MUX_GLB_REGS, size);
+
+ /* prepare the activation of alpha blending (1 bit per plane) */
+ fcolor = bld_read(mux_o + DE_MUX_BLD_REGS, fcolor_ctl)
+ | (0x100 << plane2layer[plane_ix].pipe);
+
+ de_lcd_select(priv, lcd_num, mux_o);
+
+ if (chan == 0) { /* VI channel */
+ int i;
+
+ data = VI_CFG_ATTR_en | (fmt << VI_CFG_ATTR_fmt_SHIFT) |
+ ui_sel;
+ vi_write(chan_o, cfg[layer].attr, data);
+ vi_write(chan_o, cfg[layer].size, size);
+ vi_write(chan_o, cfg[layer].coord, coord);
+ for (i = 0; i < VI_N_PLANES; i++) {
+ vi_write(chan_o, cfg[layer].pitch[i],
+ fb->pitches[i] ? fb->pitches[i] :
+ fb->pitches[0]);
+ vi_write(chan_o, cfg[layer].top_laddr[i],
+ gem->paddr + fb->offsets[i]);
+ vi_write(chan_o, fcolor[layer], 0xff000000);
+ }
+ if (layer == 0)
+ vi_write(chan_o, ovl_size[0], screen_size);
+
+ } else { /* UI channel */
+ data = UI_CFG_ATTR_en | (fmt << UI_CFG_ATTR_fmt_SHIFT) |
+ alpha_glob;
+ ui_write(chan_o, cfg[layer].attr, data);
+ ui_write(chan_o, cfg[layer].size, size);
+ ui_write(chan_o, cfg[layer].coord, coord);
+ ui_write(chan_o, cfg[layer].pitch, fb->pitches[0]);
+ ui_write(chan_o, cfg[layer].top_laddr,
+ gem->paddr + fb->offsets[0]);
+ if (layer == 0)
+ ui_write(chan_o, ovl_size, screen_size);
+ }
+ bld_write(mux_o + DE_MUX_BLD_REGS, fcolor_ctl, fcolor);
+
+ spin_unlock_irqrestore(&de_lock, flags);
+}
+
+void de2_de_plane_disable(struct priv *priv,
+ int lcd_num, int plane_ix)
+{
+ void __iomem *mux_o = priv->mmio;
+ void __iomem *chan_o;
+ u32 fcolor;
+ int chan, layer, chan_disable = 0;
+ unsigned long flags;
+
+ chan = plane2layer[plane_ix].chan;
+ layer = plane2layer[plane_ix].layer;
+
+ mux_o += (lcd_num == 0) ? DE_MUX0_BASE : DE_MUX1_BASE;
+ chan_o = mux_o;
+ chan_o += DE_MUX_CHAN_REGS + DE_MUX_CHAN_SZ * chan;
+
+ /* (only 2 layers) */
+ if (chan == 0) {
+ if (vi_read(chan_o, cfg[1 - layer].attr) == 0)
+ chan_disable = 1;
+ } else {
+ if (ui_read(chan_o, cfg[1 - layer].attr) == 0)
+ chan_disable = 1;
+ }
+
+ spin_lock_irqsave(&de_lock, flags);
+
+ fcolor = bld_read(mux_o + DE_MUX_BLD_REGS, fcolor_ctl);
+
+ de_lcd_select(priv, lcd_num, mux_o);
+
+ if (chan == 0)
+ vi_write(chan_o, cfg[layer].attr, 0);
+ else
+ ui_write(chan_o, cfg[layer].attr, 0);
+
+ if (chan_disable)
+ bld_write(mux_o + DE_MUX_BLD_REGS, fcolor_ctl,
+ fcolor & ~(0x100 << plane2layer[plane_ix].pipe));
+
+ spin_unlock_irqrestore(&de_lock, flags);
+}
+
+void de2_de_panel_init(struct priv *priv, int lcd_num,
+ struct drm_display_mode *mode)
+{
+ void __iomem *mux_o = priv->mmio;
+ u32 size = WH(mode->hdisplay, mode->vdisplay);
+ unsigned i;
+ unsigned long flags;
+
+ mux_o += (lcd_num == 0) ? DE_MUX0_BASE : DE_MUX1_BASE;
+
+ DRM_DEBUG_DRIVER("%dx%d\n", mode->hdisplay, mode->vdisplay);
+
+ spin_lock_irqsave(&de_lock, flags);
+
+ de_lcd_select(priv, lcd_num, mux_o);
+
+ glb_write(mux_o + DE_MUX_GLB_REGS, size, size);
+
+ /* set alpha blending */
+ for (i = 0; i < 4; i++) {
+ bld_write(mux_o + DE_MUX_BLD_REGS, attr[i].fcolor, 0xff000000);
+ bld_write(mux_o + DE_MUX_BLD_REGS, attr[i].insize, size);
+ }
+ bld_write(mux_o + DE_MUX_BLD_REGS, output_size, size);
+ bld_write(mux_o + DE_MUX_BLD_REGS, out_ctl,
+ mode->flags & DRM_MODE_FLAG_INTERLACE ? 2 : 0);
+
+ spin_unlock_irqrestore(&de_lock, flags);
+}
+
+void de2_de_enable(struct priv *priv, int lcd_num)
+{
+ void __iomem *mux_o = priv->mmio;
+ unsigned chan, i;
+ u32 size = WH(1920, 1080);
+ u32 data;
+ unsigned long flags;
+
+ DRM_DEBUG_DRIVER("lcd %d\n", lcd_num);
+
+ de_write(priv, DE_RESET_REG,
+ de_read(priv, DE_RESET_REG) |
+ (lcd_num == 0 ? 1 : 4));
+ data = 1 << lcd_num; /* 1 bit / lcd */
+ de_write(priv, DE_GATE_REG,
+ de_read(priv, DE_GATE_REG) | data);
+ de_write(priv, DE_MOD_REG,
+ de_read(priv, DE_MOD_REG) | data);
+
+ mux_o += (lcd_num == 0) ? DE_MUX0_BASE : DE_MUX1_BASE;
+
+ spin_lock_irqsave(&de_lock, flags);
+
+ /* select the LCD */
+ data = de_read(priv, DE_SEL_REG);
+ if (lcd_num == 0)
+ data &= ~1;
+ else
+ data |= 1;
+ de_write(priv, DE_SEL_REG, data);
+
+ /* start init */
+ glb_write(mux_o + DE_MUX_GLB_REGS, ctl,
+ DE_MUX_GLB_CTL_rt_en | DE_MUX_GLB_CTL_rtwb_port);
+ glb_write(mux_o + DE_MUX_GLB_REGS, status, 0);
+ glb_write(mux_o + DE_MUX_GLB_REGS, dbuff, 1); /* dble reg switch */
+ glb_write(mux_o + DE_MUX_GLB_REGS, size, size);
+
+ /* clear the VI/UI channels */
+ for (chan = 0; chan < 4; chan++) {
+ void __iomem *chan_o = mux_o + DE_MUX_CHAN_REGS +
+ DE_MUX_CHAN_SZ * chan;
+
+ memset_io(chan_o, 0, chan == 0 ?
+ sizeof(struct de_vi) : sizeof(struct de_ui));
+
+ /* only 1 VI and 1 UI in lcd1 */
+ if (chan == 2 && lcd_num == 1)
+ break;
+ }
+
+ /* clear and set alpha blending */
+ memset_io(mux_o + DE_MUX_BLD_REGS, 0, offsetof(struct de_bld, dum0));
+ bld_write(mux_o + DE_MUX_BLD_REGS, fcolor_ctl, 0x00000101);
+ /* fcolor for primary */
+
+ /* prepare route for planes */
+ data = 0;
+ for (i = 0; i < DE2_N_PLANES; i++)
+ data |= plane2layer[i].chan << (plane2layer[i].pipe * 4);
+ bld_write(mux_o + DE_MUX_BLD_REGS, route, data);
+
+ bld_write(mux_o + DE_MUX_BLD_REGS, premultiply, 0);
+ bld_write(mux_o + DE_MUX_BLD_REGS, bkcolor, 0xff000000);
+ bld_write(mux_o + DE_MUX_BLD_REGS, bld_mode[0], 0x03010301);
+ /* SRCOVER */
+ bld_write(mux_o + DE_MUX_BLD_REGS, bld_mode[1], 0x03010301);
+ bld_write(mux_o + DE_MUX_BLD_REGS, out_ctl, 0);
+
+ /* disable the enhancements */
+ writel_relaxed(0, mux_o + DE_MUX_VSU_REGS);
+ writel_relaxed(0, mux_o + DE_MUX_GSU1_REGS);
+ writel_relaxed(0, mux_o + DE_MUX_GSU2_REGS);
+ writel_relaxed(0, mux_o + DE_MUX_GSU3_REGS);
+ writel_relaxed(0, mux_o + DE_MUX_FCE_REGS);
+ writel_relaxed(0, mux_o + DE_MUX_BWS_REGS);
+ writel_relaxed(0, mux_o + DE_MUX_LTI_REGS);
+ writel_relaxed(0, mux_o + DE_MUX_PEAK_REGS);
+ writel_relaxed(0, mux_o + DE_MUX_ASE_REGS);
+ writel_relaxed(0, mux_o + DE_MUX_FCC_REGS);
+ writel_relaxed(0, mux_o + DE_MUX_DCSC_REGS);
+
+ spin_unlock_irqrestore(&de_lock, flags);
+}
+
+void de2_de_disable(struct priv *priv, int lcd_num)
+{
+ u32 data;
+
+ data = ~(1 << lcd_num);
+ de_write(priv, DE_MOD_REG,
+ de_read(priv, DE_MOD_REG) & data);
+ de_write(priv, DE_GATE_REG,
+ de_read(priv, DE_GATE_REG) & data);
+ de_write(priv, DE_RESET_REG,
+ de_read(priv, DE_RESET_REG) & data);
+}
+
+int de2_de_init(struct priv *priv, struct device *dev)
+{
+ struct resource *res;
+ int ret;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ res = platform_get_resource(to_platform_device(dev),
+ IORESOURCE_MEM, 0);
+ if (!res) {
+ dev_err(dev, "failed to get memory resource\n");
+ return -EINVAL;
+ }
+
+ priv->mmio = devm_ioremap_resource(dev, res);
+ if (IS_ERR(priv->mmio)) {
+ dev_err(dev, "failed to map registers\n");
+ return PTR_ERR(priv->mmio);
+ }
+
+ priv->gate = devm_clk_get(dev, "gate"); /* optional */
+
+ priv->clk = devm_clk_get(dev, "clock");
+ if (IS_ERR(priv->clk)) {
+ dev_err(dev, "video clock err %d\n", (int) PTR_ERR(priv->clk));
+ return PTR_ERR(priv->clk);
+ }
+
+ priv->rstc = devm_reset_control_get_optional(dev, NULL);
+
+ if (!IS_ERR(priv->rstc)) {
+ ret = reset_control_deassert(priv->rstc);
+ if (ret) {
+ dev_err(dev, "reset deassert err %d\n", ret);
+ return ret;
+ }
+ }
+
+ if (!IS_ERR(priv->gate)) {
+ ret = clk_prepare_enable(priv->gate);
+ if (ret)
+ goto err_gate;
+ }
+
+ ret = clk_prepare_enable(priv->clk);
+ if (ret)
+ goto err_enable;
+ if (priv->soc_type == SOC_A83T)
+ clk_set_rate(priv->clk, DE_CLK_RATE_A83T);
+ else
+ clk_set_rate(priv->clk, DE_CLK_RATE_H3);
+
+ /* set the A83T clock divider = 500 / 250 */
+ if (priv->soc_type == SOC_A83T)
+ de_write(priv, DE_DIV_REG,
+ 0x00000011); /* div = 2 for both LCDs */
+
+ return 0;
+
+err_enable:
+ clk_disable_unprepare(priv->gate);
+err_gate:
+ if (!IS_ERR(priv->rstc))
+ reset_control_assert(priv->rstc);
+ return ret;
+}
+
+void de2_de_cleanup(struct priv *priv)
+{
+ clk_disable_unprepare(priv->clk);
+ clk_disable_unprepare(priv->gate);
+ if (!IS_ERR(priv->rstc))
+ reset_control_assert(priv->rstc);
+}
diff --git a/drivers/gpu/drm/sunxi/de2_drm.h b/drivers/gpu/drm/sunxi/de2_drm.h
new file mode 100644
index 0000000..7bb966c
--- /dev/null
+++ b/drivers/gpu/drm/sunxi/de2_drm.h
@@ -0,0 +1,47 @@
+#ifndef __DE2_DRM_H__
+#define __DE2_DRM_H__
+/*
+ * Copyright (C) 2016 Jean-François Moine
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/reset.h>
+#include <drm/drmP.h>
+#include <drm/drm_fb_cma_helper.h>
+
+struct lcd;
+
+#define N_LCDS 2
+
+/* SoC types */
+#define SOC_A83T 0
+#define SOC_H3 1
+
+struct priv {
+ void __iomem *mmio;
+ struct clk *clk;
+ struct clk *gate;
+ struct reset_control *rstc;
+
+ int soc_type;
+
+ struct drm_fbdev_cma *fbdev;
+
+ struct lcd *lcds[N_LCDS];
+};
+
+/* in de2_crtc.c */
+int de2_enable_vblank(struct drm_device *drm, unsigned crtc);
+void de2_disable_vblank(struct drm_device *drm, unsigned crtc);
+extern struct platform_driver de2_lcd_platform_driver;
+
+/* in de2_de.c */
+int de2_de_init(struct priv *priv, struct device *dev);
+void de2_de_cleanup(struct priv *priv);
+
+#endif /* __DE2_DRM_H__ */
diff --git a/drivers/gpu/drm/sunxi/de2_drv.c b/drivers/gpu/drm/sunxi/de2_drv.c
new file mode 100644
index 0000000..5daa15c
--- /dev/null
+++ b/drivers/gpu/drm/sunxi/de2_drv.c
@@ -0,0 +1,378 @@
+/*
+ * Allwinner DRM driver - DE2 DRM driver
+ *
+ * Copyright (C) 2016 Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/pm_runtime.h>
+#include <linux/of_device.h>
+#include <linux/of_graph.h>
+#include <linux/component.h>
+#include <drm/drm_of.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_gem_cma_helper.h>
+
+#include "de2_drm.h"
+
+#define DRIVER_NAME "sunxi-de2"
+#define DRIVER_DESC "Allwinner DRM DE2"
+#define DRIVER_DATE "20161001"
+#define DRIVER_MAJOR 1
+#define DRIVER_MINOR 0
+
+static struct of_device_id de2_drm_of_match[] = {
+ { .compatible = "allwinner,sun8i-a83t-display-engine",
+ .data = (void *) SOC_A83T },
+ { .compatible = "allwinner,sun8i-h3-display-engine",
+ .data = (void *) SOC_H3 },
+ { },
+};
+MODULE_DEVICE_TABLE(of, de2_drm_of_match);
+
+static void de2_fb_output_poll_changed(struct drm_device *drm)
+{
+ struct priv *priv = drm->dev_private;
+
+ if (priv->fbdev)
+ drm_fbdev_cma_hotplug_event(priv->fbdev);
+}
+
+static const struct drm_mode_config_funcs de2_mode_config_funcs = {
+ .fb_create = drm_fb_cma_create,
+ .output_poll_changed = de2_fb_output_poll_changed,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = drm_atomic_helper_commit,
+};
+
+/*
+ * DRM operations:
+ */
+static void de2_lastclose(struct drm_device *drm)
+{
+ struct priv *priv = drm->dev_private;
+
+ if (priv->fbdev)
+ drm_fbdev_cma_restore_mode(priv->fbdev);
+}
+
+static const struct file_operations de2_fops = {
+ .owner = THIS_MODULE,
+ .open = drm_open,
+ .release = drm_release,
+ .unlocked_ioctl = drm_ioctl,
+ .poll = drm_poll,
+ .read = drm_read,
+ .llseek = no_llseek,
+ .mmap = drm_gem_cma_mmap,
+};
+
+static struct drm_driver de2_drm_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME |
+ DRIVER_ATOMIC,
+ .lastclose = de2_lastclose,
+ .get_vblank_counter = drm_vblank_no_hw_counter,
+ .enable_vblank = de2_enable_vblank,
+ .disable_vblank = de2_disable_vblank,
+ .gem_free_object = drm_gem_cma_free_object,
+ .gem_vm_ops = &drm_gem_cma_vm_ops,
+ .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+ .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+ .gem_prime_import = drm_gem_prime_import,
+ .gem_prime_export = drm_gem_prime_export,
+ .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
+ .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
+ .gem_prime_vmap = drm_gem_cma_prime_vmap,
+ .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
+ .gem_prime_mmap = drm_gem_cma_prime_mmap,
+ .dumb_create = drm_gem_cma_dumb_create,
+ .dumb_map_offset = drm_gem_cma_dumb_map_offset,
+ .dumb_destroy = drm_gem_dumb_destroy,
+ .fops = &de2_fops,
+ .name = DRIVER_NAME,
+ .desc = DRIVER_DESC,
+ .date = DRIVER_DATE,
+ .major = DRIVER_MAJOR,
+ .minor = DRIVER_MINOR,
+};
+
+#ifdef CONFIG_PM_SLEEP
+/*
+ * Power management
+ */
+static int de2_pm_suspend(struct device *dev)
+{
+ struct drm_device *drm = dev_get_drvdata(dev);
+
+ drm_kms_helper_poll_disable(drm);
+ return 0;
+}
+
+static int de2_pm_resume(struct device *dev)
+{
+ struct drm_device *drm = dev_get_drvdata(dev);
+
+ drm_kms_helper_poll_enable(drm);
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops de2_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(de2_pm_suspend, de2_pm_resume)
+};
+
+/*
+ * Platform driver
+ */
+
+static int de2_drm_bind(struct device *dev)
+{
+ struct drm_device *drm;
+ struct priv *priv;
+ int ret;
+
+ drm = drm_dev_alloc(&de2_drm_driver, dev);
+ if (!drm)
+ return -ENOMEM;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv) {
+ dev_err(dev, "failed to allocate private area\n");
+ ret = -ENOMEM;
+ goto out1;
+ }
+
+ dev_set_drvdata(dev, drm);
+ drm->dev_private = priv;
+
+ drm_mode_config_init(drm);
+ drm->mode_config.min_width = 32; /* needed for cursor */
+ drm->mode_config.min_height = 32;
+ drm->mode_config.max_width = 1920;
+ drm->mode_config.max_height = 1080;
+ drm->mode_config.funcs = &de2_mode_config_funcs;
+
+ drm->irq_enabled = true;
+
+ /* initialize the display engine */
+ priv->soc_type = (int) of_match_device(de2_drm_of_match, dev)->data;
+ ret = de2_de_init(priv, dev);
+ if (ret)
+ goto out2;
+
+ /* start the subdevices */
+ ret = component_bind_all(dev, drm);
+ if (ret < 0)
+ goto out2;
+
+ ret = drm_dev_register(drm, 0);
+ if (ret < 0)
+ goto out3;
+
+ DRM_DEBUG_DRIVER("%d crtcs %d connectors\n",
+ drm->mode_config.num_crtc,
+ drm->mode_config.num_connector);
+
+ ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
+ if (ret < 0)
+ dev_warn(dev, "failed to initialize vblank\n");
+
+ drm_mode_config_reset(drm);
+
+ priv->fbdev = drm_fbdev_cma_init(drm,
+ 32, /* bpp */
+ drm->mode_config.num_crtc,
+ drm->mode_config.num_connector);
+ if (IS_ERR(priv->fbdev)) {
+ ret = PTR_ERR(priv->fbdev);
+ priv->fbdev = NULL;
+ goto out4;
+ }
+
+ drm_kms_helper_poll_init(drm);
+
+ return 0;
+
+out4:
+ drm_dev_unregister(drm);
+out3:
+ component_unbind_all(dev, drm);
+out2:
+ kfree(priv);
+out1:
+ drm_dev_unref(drm);
+ return ret;
+}
+
+static void de2_drm_unbind(struct device *dev)
+{
+ struct drm_device *drm = dev_get_drvdata(dev);
+ struct priv *priv = drm->dev_private;
+
+ if (priv)
+ drm_fbdev_cma_fini(priv->fbdev);
+ drm_kms_helper_poll_fini(drm);
+
+ drm_dev_unregister(drm);
+ drm_vblank_cleanup(drm);
+
+ drm_mode_config_cleanup(drm);
+
+ component_unbind_all(dev, drm);
+
+ if (priv) {
+ de2_de_cleanup(priv);
+ kfree(priv);
+ }
+
+ drm_dev_unref(drm);
+}
+
+static const struct component_master_ops de2_drm_comp_ops = {
+ .bind = de2_drm_bind,
+ .unbind = de2_drm_unbind,
+};
+
+static int compare_of(struct device *dev, void *data)
+{
+ return dev->of_node == data;
+}
+
+static int de2_drm_add_components(struct device *dev,
+ int (*compare_of)(struct device *, void *),
+ const struct component_master_ops *m_ops)
+{
+ struct device_node *ep, *port, *remote;
+ struct component_match *match = NULL;
+ int i;
+
+ if (!dev->of_node)
+ return -EINVAL;
+
+ /* bind the CRTCs */
+ for (i = 0; ; i++) {
+ port = of_parse_phandle(dev->of_node, "ports", i);
+ if (!port)
+ break;
+
+ if (!of_device_is_available(port->parent)) {
+ of_node_put(port);
+ continue;
+ }
+
+ component_match_add(dev, &match, compare_of, port->parent);
+ of_node_put(port);
+ }
+
+ if (i == 0) {
+ dev_err(dev, "missing 'ports' property\n");
+ return -ENODEV;
+ }
+ if (!match) {
+ dev_err(dev, "no available port\n");
+ return -ENODEV;
+ }
+
+ /* bind the encoders/connectors */
+ for (i = 0; ; i++) {
+ port = of_parse_phandle(dev->of_node, "ports", i);
+ if (!port)
+ break;
+
+ if (!of_device_is_available(port->parent)) {
+ of_node_put(port);
+ continue;
+ }
+
+ for_each_child_of_node(port, ep) {
+ remote = of_graph_get_remote_port_parent(ep);
+ if (!remote || !of_device_is_available(remote)) {
+ of_node_put(remote);
+ continue;
+ }
+ if (!of_device_is_available(remote->parent)) {
+ dev_warn(dev,
+ "parent device of %s is not available\n",
+ remote->full_name);
+ of_node_put(remote);
+ continue;
+ }
+
+ component_match_add(dev, &match, compare_of, remote);
+ of_node_put(remote);
+ }
+ of_node_put(port);
+ }
+
+ return component_master_add_with_match(dev, m_ops, match);
+}
+
+static int de2_drm_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ ret = de2_drm_add_components(&pdev->dev,
+ compare_of,
+ &de2_drm_comp_ops);
+ if (ret == -EINVAL)
+ ret = -ENXIO;
+ return ret;
+}
+
+static int de2_drm_remove(struct platform_device *pdev)
+{
+ component_master_del(&pdev->dev, &de2_drm_comp_ops);
+
+ return 0;
+}
+
+static struct platform_driver de2_drm_platform_driver = {
+ .probe = de2_drm_probe,
+ .remove = de2_drm_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ .pm = &de2_pm_ops,
+ .of_match_table = de2_drm_of_match,
+ },
+};
+
+static int __init de2_drm_init(void)
+{
+ int ret;
+
+/* uncomment to activate the drm traces at startup time */
+/* drm_debug = DRM_UT_CORE | DRM_UT_DRIVER | DRM_UT_KMS |
+ DRM_UT_PRIME | DRM_UT_ATOMIC; */
+
+ DRM_DEBUG_DRIVER("\n");
+
+ ret = platform_driver_register(&de2_lcd_platform_driver);
+ if (ret < 0)
+ return ret;
+
+ ret = platform_driver_register(&de2_drm_platform_driver);
+ if (ret < 0)
+ platform_driver_unregister(&de2_lcd_platform_driver);
+
+ return ret;
+}
+
+static void __exit de2_drm_fini(void)
+{
+ platform_driver_unregister(&de2_lcd_platform_driver);
+ platform_driver_unregister(&de2_drm_platform_driver);
+}
+
+module_init(de2_drm_init);
+module_exit(de2_drm_fini);
+
+MODULE_AUTHOR("Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>");
+MODULE_DESCRIPTION("Allwinner DE2 DRM Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/sunxi/de2_plane.c b/drivers/gpu/drm/sunxi/de2_plane.c
new file mode 100644
index 0000000..b338684
--- /dev/null
+++ b/drivers/gpu/drm/sunxi/de2_plane.c
@@ -0,0 +1,119 @@
+/*
+ * Allwinner DRM driver - DE2 planes
+ *
+ * Copyright (C) 2016 Jean-Francois Moine <moinejf-GANU6spQydw@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_plane_helper.h>
+#include <drm/drm_crtc_helper.h>
+
+#include "de2_drm.h"
+#include "de2_crtc.h"
+
+/* plane formats */
+static const uint32_t ui_formats[] = {
+ DRM_FORMAT_ARGB8888,
+ DRM_FORMAT_BGRA8888,
+ DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_RGB888,
+ DRM_FORMAT_BGR888,
+};
+
+static const uint32_t vi_formats[] = {
+ DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_YUYV,
+ DRM_FORMAT_YVYU,
+ DRM_FORMAT_YUV422,
+ DRM_FORMAT_YUV420,
+ DRM_FORMAT_UYVY,
+ DRM_FORMAT_BGRA8888,
+ DRM_FORMAT_RGB888,
+ DRM_FORMAT_BGR888,
+};
+
+static void de2_plane_disable(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct drm_crtc *crtc = old_state->crtc;
+ struct lcd *lcd = crtc_to_lcd(crtc);
+ int plane_num = plane - lcd->planes;
+
+ de2_de_plane_disable(lcd->priv, lcd->num, plane_num);
+}
+
+static void de2_plane_update(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct drm_plane_state *state = plane->state;
+ struct drm_crtc *crtc = state->crtc;
+ struct lcd *lcd = crtc_to_lcd(crtc);
+ struct drm_framebuffer *fb = state->fb;
+ int plane_num = plane - lcd->planes;
+
+ if (!crtc || !fb) {
+ DRM_DEBUG_DRIVER("no crtc/fb\n");
+ return;
+ }
+
+ de2_de_plane_update(lcd->priv, lcd->num, plane_num,
+ state, old_state);
+}
+
+static const struct drm_plane_helper_funcs plane_helper_funcs = {
+ .atomic_disable = de2_plane_disable,
+ .atomic_update = de2_plane_update,
+};
+
+static const struct drm_plane_funcs plane_funcs = {
+ .update_plane = drm_atomic_helper_update_plane,
+ .disable_plane = drm_atomic_helper_disable_plane,
+ .destroy = drm_plane_cleanup,
+ .reset = drm_atomic_helper_plane_reset,
+ .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
+ .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
+};
+
+static int de2_one_plane_init(struct drm_device *drm,
+ struct drm_plane *plane,
+ int type, int possible_crtcs,
+ const uint32_t *formats,
+ int nformats)
+{
+ int ret;
+
+ ret = drm_universal_plane_init(drm, plane, possible_crtcs,
+ &plane_funcs,
+ formats, nformats, type, NULL);
+ if (ret >= 0)
+ drm_plane_helper_add(plane, &plane_helper_funcs);
+
+ return ret;
+}
+
+int de2_plane_init(struct drm_device *drm, struct lcd *lcd)
+{
+ int ret, possible_crtcs = 1 << lcd->crtc_idx;
+
+ ret = de2_one_plane_init(drm, &lcd->planes[DE2_PRIMARY_PLANE],
+ DRM_PLANE_TYPE_PRIMARY, possible_crtcs,
+ ui_formats, ARRAY_SIZE(ui_formats));
+ if (ret >= 0)
+ ret = de2_one_plane_init(drm, &lcd->planes[DE2_CURSOR_PLANE],
+ DRM_PLANE_TYPE_CURSOR, possible_crtcs,
+ ui_formats, ARRAY_SIZE(ui_formats));
+ if (ret >= 0)
+ ret = de2_one_plane_init(drm, &lcd->planes[DE2_VI_PLANE],
+ DRM_PLANE_TYPE_OVERLAY, possible_crtcs,
+ vi_formats, ARRAY_SIZE(vi_formats));
+ if (ret < 0)
+ dev_err(lcd->dev, "Couldn't initialize the planes err %d\n",
+ ret);
+
+ return ret;
+}
--
2.10.1

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