On Thu, Mar 28, 2019 at 04:13:16PM +1030, Joel Stanley wrote:
> This driver is for the ASPEED BMC SoC's GFX display hardware. This
> driver runs on the ARM based BMC systems, unlike the ast driver which
> runs on a host CPU and is is for a PCI graphics device.
>
> Signed-off-by: Joel Stanley <joel@xxxxxxxxx>
> --
> Changes since RFC:
> drm_fbdev_cma_init -> drm_fb_cma_fbdev_init and use generic lastclose callback
> Use generic irq handling instead of drm_irq_install
> Add doc to driver
> Get rid of unncessary reads in irq enable/disable path
> Rebase on linux-next
>
> drivers/gpu/drm/Kconfig | 2 +
> drivers/gpu/drm/Makefile | 1 +
> drivers/gpu/drm/aspeed/Kconfig | 15 ++
> drivers/gpu/drm/aspeed/Makefile | 3 +
> drivers/gpu/drm/aspeed/aspeed_gfx.h | 104 +++++++++
> drivers/gpu/drm/aspeed/aspeed_gfx_crtc.c | 248 +++++++++++++++++++++
> drivers/gpu/drm/aspeed/aspeed_gfx_drv.c | 269 +++++++++++++++++++++++
> drivers/gpu/drm/aspeed/aspeed_gfx_out.c | 49 +++++
> 8 files changed, 691 insertions(+)
> create mode 100644 drivers/gpu/drm/aspeed/Kconfig
> create mode 100644 drivers/gpu/drm/aspeed/Makefile
> create mode 100644 drivers/gpu/drm/aspeed/aspeed_gfx.h
> create mode 100644 drivers/gpu/drm/aspeed/aspeed_gfx_crtc.c
> create mode 100644 drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
> create mode 100644 drivers/gpu/drm/aspeed/aspeed_gfx_out.c
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index 82bb221ec94e..b1ec8f85c2a8 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -335,6 +335,8 @@ source "drivers/gpu/drm/xen/Kconfig"
>
> source "drivers/gpu/drm/vboxvideo/Kconfig"
>
> +source "drivers/gpu/drm/aspeed/Kconfig"
> +
> # Keep legacy drivers last
>
> menuconfig DRM_LEGACY
> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> index 0baf148e3687..df8835045310 100644
> --- a/drivers/gpu/drm/Makefile
> +++ b/drivers/gpu/drm/Makefile
> @@ -110,3 +110,4 @@ obj-$(CONFIG_DRM_PL111) += pl111/
> obj-$(CONFIG_DRM_TVE200) += tve200/
> obj-$(CONFIG_DRM_XEN) += xen/
> obj-$(CONFIG_DRM_VBOXVIDEO) += vboxvideo/
> +obj-$(CONFIG_DRM_ASPEED_GFX) += aspeed/
> diff --git a/drivers/gpu/drm/aspeed/Kconfig b/drivers/gpu/drm/aspeed/Kconfig
> new file mode 100644
> index 000000000000..6f1e64c0a6ce
> --- /dev/null
> +++ b/drivers/gpu/drm/aspeed/Kconfig
> @@ -0,0 +1,15 @@
> +config DRM_ASPEED_GFX
> + tristate "ASPEED BMC Display Controller"
> + depends on DRM && OF
> + select DRM_KMS_HELPER
> + select DRM_KMS_FB_HELPER
> + select DRM_KMS_CMA_HELPER
> + select DRM_PANEL
> + select DMA_CMA
> + select CMA
> + select MFD_SYSCON
> + help
> + Chose this option if you have an ASPEED AST2400/AST2500
> + SOC Display Controller (aka GFX).
> +
> + If M is selected this module will be called aspeed_gfx.
> diff --git a/drivers/gpu/drm/aspeed/Makefile b/drivers/gpu/drm/aspeed/Makefile
> new file mode 100644
> index 000000000000..6e194cd790d8
> --- /dev/null
> +++ b/drivers/gpu/drm/aspeed/Makefile
> @@ -0,0 +1,3 @@
> +aspeed_gfx-y := aspeed_gfx_drv.o aspeed_gfx_crtc.o aspeed_gfx_out.o
> +
> +obj-$(CONFIG_DRM_ASPEED_GFX) += aspeed_gfx.o
> diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx.h b/drivers/gpu/drm/aspeed/aspeed_gfx.h
> new file mode 100644
> index 000000000000..fb56e425bd48
> --- /dev/null
> +++ b/drivers/gpu/drm/aspeed/aspeed_gfx.h
> @@ -0,0 +1,104 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +// Copyright 2018 IBM Corporation
> +
> +#include <drm/drmP.h>
> +#include <drm/drm_simple_kms_helper.h>
> +
> +struct aspeed_gfx {
> + void __iomem *base;
> + struct clk *clk;
> + struct reset_control *rst;
> + struct regmap *scu;
> +
> + struct drm_simple_display_pipe pipe;
> + struct drm_connector connector;
> + struct drm_fbdev_cma *fbdev;
> +};
> +
> +int aspeed_gfx_create_pipe(struct drm_device *drm);
> +int aspeed_gfx_create_output(struct drm_device *drm);
> +
> +#define CRT_CTRL1 0x60 /* CRT Control I */
> +#define CRT_CTRL2 0x64 /* CRT Control II */
> +#define CRT_STATUS 0x68 /* CRT Status */
> +#define CRT_MISC 0x6c /* CRT Misc Setting */
> +#define CRT_HORIZ0 0x70 /* CRT Horizontal Total & Display Enable End */
> +#define CRT_HORIZ1 0x74 /* CRT Horizontal Retrace Start & End */
> +#define CRT_VERT0 0x78 /* CRT Vertical Total & Display Enable End */
> +#define CRT_VERT1 0x7C /* CRT Vertical Retrace Start & End */
> +#define CRT_ADDR 0x80 /* CRT Display Starting Address */
> +#define CRT_OFFSET 0x84 /* CRT Display Offset & Terminal Count */
> +#define CRT_THROD 0x88 /* CRT Threshold */
> +#define CRT_XSCALE 0x8C /* CRT Scaling-Up Factor */
> +#define CRT_CURSOR0 0x90 /* CRT Hardware Cursor X & Y Offset */
> +#define CRT_CURSOR1 0x94 /* CRT Hardware Cursor X & Y Position */
> +#define CRT_CURSOR2 0x98 /* CRT Hardware Cursor Pattern Address */
> +#define CRT_9C 0x9C
> +#define CRT_OSD_H 0xA0 /* CRT OSD Horizontal Start/End */
> +#define CRT_OSD_V 0xA4 /* CRT OSD Vertical Start/End */
> +#define CRT_OSD_ADDR 0xA8 /* CRT OSD Pattern Address */
> +#define CRT_OSD_DISP 0xAC /* CRT OSD Offset */
> +#define CRT_OSD_THRESH 0xB0 /* CRT OSD Threshold & Alpha */
> +#define CRT_B4 0xB4
> +#define CRT_STS_V 0xB8 /* CRT Status V */
> +#define CRT_SCRATCH 0xBC /* Scratchpad */
> +#define CRT_BB0_ADDR 0xD0 /* CRT Display BB0 Starting Address */
> +#define CRT_BB1_ADDR 0xD4 /* CRT Display BB1 Starting Address */
> +#define CRT_BB_COUNT 0xD8 /* CRT Display BB Terminal Count */
> +#define OSD_COLOR1 0xE0 /* OSD Color Palette Index 1 & 0 */
> +#define OSD_COLOR2 0xE4 /* OSD Color Palette Index 3 & 2 */
> +#define OSD_COLOR3 0xE8 /* OSD Color Palette Index 5 & 4 */
> +#define OSD_COLOR4 0xEC /* OSD Color Palette Index 7 & 6 */
> +#define OSD_COLOR5 0xF0 /* OSD Color Palette Index 9 & 8 */
> +#define OSD_COLOR6 0xF4 /* OSD Color Palette Index 11 & 10 */
> +#define OSD_COLOR7 0xF8 /* OSD Color Palette Index 13 & 12 */
> +#define OSD_COLOR8 0xFC /* OSD Color Palette Index 15 & 14 */
> +
> +/* CTRL1 */
> +#define CRT_CTRL_EN BIT(0)
> +#define CRT_CTRL_HW_CURSOR_EN BIT(1)
> +#define CRT_CTRL_OSD_EN BIT(2)
> +#define CRT_CTRL_INTERLACED BIT(3)
> +#define CRT_CTRL_COLOR_RGB565 (0 << 7)
> +#define CRT_CTRL_COLOR_YUV444 (1 << 7)
> +#define CRT_CTRL_COLOR_XRGB8888 (2 << 7)
> +#define CRT_CTRL_COLOR_RGB888 (3 << 7)
> +#define CRT_CTRL_COLOR_YUV444_2RGB (5 << 7)
> +#define CRT_CTRL_COLOR_YUV422 (7 << 7)
> +#define CRT_CTRL_COLOR_MASK GENMASK(9, 7)
> +#define CRT_CTRL_HSYNC_NEGATIVE BIT(16)
> +#define CRT_CTRL_VSYNC_NEGATIVE BIT(17)
> +#define CRT_CTRL_VERTICAL_INTR_EN BIT(30)
> +#define CRT_CTRL_VERTICAL_INTR_STS BIT(31)
> +
> +/* CTRL2 */
> +#define CRT_CTRL_DAC_EN BIT(0)
> +#define CRT_CTRL_VBLANK_LINE(x) (((x) << 20) & CRT_CTRL_VBLANK_LINE_MASK)
> +#define CRT_CTRL_VBLANK_LINE_MASK GENMASK(20, 31)
> +
> +/* CRT_HORIZ0 */
> +#define CRT_H_TOTAL(x) (x)
> +#define CRT_H_DE(x) ((x) << 16)
> +
> +/* CRT_HORIZ1 */
> +#define CRT_H_RS_START(x) (x)
> +#define CRT_H_RS_END(x) ((x) << 16)
> +
> +/* CRT_VIRT0 */
> +#define CRT_V_TOTAL(x) (x)
> +#define CRT_V_DE(x) ((x) << 16)
> +
> +/* CRT_VIRT1 */
> +#define CRT_V_RS_START(x) (x)
> +#define CRT_V_RS_END(x) ((x) << 16)
> +
> +/* CRT_OFFSET */
> +#define CRT_DISP_OFFSET(x) (x)
> +#define CRT_TERM_COUNT(x) ((x) << 16)
> +
> +/* CRT_THROD */
> +#define CRT_THROD_LOW(x) (x)
> +#define CRT_THROD_HIGH(x) ((x) << 8)
> +
> +/* Default Threshold Seting */
> +#define G5_CRT_THROD_VAL (CRT_THROD_LOW(0x24) | CRT_THROD_HIGH(0x3C))
> diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_crtc.c b/drivers/gpu/drm/aspeed/aspeed_gfx_crtc.c
> new file mode 100644
> index 000000000000..e2d1d7497352
> --- /dev/null
> +++ b/drivers/gpu/drm/aspeed/aspeed_gfx_crtc.c
> @@ -0,0 +1,248 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +// Copyright 2018 IBM Corporation
> +
> +#include <linux/clk.h>
> +#include <linux/reset.h>
> +#include <linux/regmap.h>
> +
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_device.h>
> +#include <drm/drm_fb_cma_helper.h>
> +#include <drm/drm_gem_cma_helper.h>
> +#include <drm/drm_simple_kms_helper.h>
> +#include <drm/drm_gem_framebuffer_helper.h>
> +#include <drm/drm_panel.h>
> +
> +#include "aspeed_gfx.h"
> +
> +static struct aspeed_gfx *
> +drm_pipe_to_aspeed_gfx(struct drm_simple_display_pipe *pipe)
> +{
> + return container_of(pipe, struct aspeed_gfx, pipe);
> +}
> +
> +static int aspeed_gfx_set_pixel_fmt(struct aspeed_gfx *priv, u32 *bpp)
> +{
> + struct drm_crtc *crtc = &priv->pipe.crtc;
> + struct drm_device *drm = crtc->dev;
> + const u32 format = crtc->primary->state->fb->format->format;
> + u32 ctrl1;
> +
> + ctrl1 = readl(priv->base + CRT_CTRL1);
> + ctrl1 &= ~CRT_CTRL_COLOR_MASK;
> +
> + switch (format) {
> + case DRM_FORMAT_RGB565:
> + dev_dbg(drm->dev, "Setting up RGB565 mode\n");
> + ctrl1 |= CRT_CTRL_COLOR_RGB565;
> + *bpp = 16;
> + break;
> + case DRM_FORMAT_XRGB8888:
> + dev_dbg(drm->dev, "Setting up XRGB8888 mode\n");
> + ctrl1 |= CRT_CTRL_COLOR_XRGB8888;
> + *bpp = 32;
> + break;
> + default:
> + dev_err(drm->dev, "Unhandled pixel format %08x\n", format);
> + return -EINVAL;
> + }
> +
> + writel(ctrl1, priv->base + CRT_CTRL1);
> +
> + return 0;
> +}
> +
> +static void aspeed_gfx_enable_controller(struct aspeed_gfx *priv)
> +{
> + u32 ctrl1 = readl(priv->base + CRT_CTRL1);
> + u32 ctrl2 = readl(priv->base + CRT_CTRL2);
> +
> + /* SCU2C: set DAC source for display output to Graphics CRT (GFX) */
> + regmap_update_bits(priv->scu, 0x2c, BIT(16), BIT(16));
> +
> + writel(ctrl1 | CRT_CTRL_EN, priv->base + CRT_CTRL1);
> + writel(ctrl2 | CRT_CTRL_DAC_EN, priv->base + CRT_CTRL2);
> +}
> +
> +static void aspeed_gfx_disable_controller(struct aspeed_gfx *priv)
> +{
> + u32 ctrl1 = readl(priv->base + CRT_CTRL1);
> + u32 ctrl2 = readl(priv->base + CRT_CTRL2);
> +
> + writel(ctrl1 & ~CRT_CTRL_EN, priv->base + CRT_CTRL1);
> + writel(ctrl2 & ~CRT_CTRL_DAC_EN, priv->base + CRT_CTRL2);
> +
> + regmap_update_bits(priv->scu, 0x2c, BIT(16), 0);
> +}
> +
> +static void aspeed_gfx_crtc_mode_set_nofb(struct aspeed_gfx *priv)
> +{
> + struct drm_display_mode *m = &priv->pipe.crtc.state->adjusted_mode;
> + u32 ctrl1, d_offset, t_count, bpp;
> + int err;
> +
> + err = aspeed_gfx_set_pixel_fmt(priv, &bpp);
> + if (err)
> + return;
> +
> +#if 0
> + /* TODO: we have only been able to test with the 40MHz USB clock. The
> + * clock is fixed, so we cannot adjust it here. */
> + clk_set_rate(priv->pixel_clk, m->crtc_clock * 1000);
> +#endif
> +
> + ctrl1 = readl(priv->base + CRT_CTRL1);
> + ctrl1 &= ~(CRT_CTRL_INTERLACED |
> + CRT_CTRL_HSYNC_NEGATIVE |
> + CRT_CTRL_VSYNC_NEGATIVE);
> +
> + if (m->flags & DRM_MODE_FLAG_INTERLACE)
> + ctrl1 |= CRT_CTRL_INTERLACED;
> +
> + if (!(m->flags & DRM_MODE_FLAG_PHSYNC))
> + ctrl1 |= CRT_CTRL_HSYNC_NEGATIVE;
> +
> + if (!(m->flags & DRM_MODE_FLAG_PVSYNC))
> + ctrl1 |= CRT_CTRL_VSYNC_NEGATIVE;
> +
> + writel(ctrl1, priv->base + CRT_CTRL1);
> +
> + /* Horizontal timing */
> + writel(CRT_H_TOTAL(m->htotal - 1) | CRT_H_DE(m->hdisplay - 1),
> + priv->base + CRT_HORIZ0);
> + writel(CRT_H_RS_START(m->hsync_start - 1) | CRT_H_RS_END(m->hsync_end),
> + priv->base + CRT_HORIZ1);
> +
> +
> + /* Vertical timing */
> + writel(CRT_V_TOTAL(m->vtotal - 1) | CRT_V_DE(m->vdisplay - 1),
> + priv->base + CRT_VERT0);
> + writel(CRT_V_RS_START(m->vsync_start) | CRT_V_RS_END(m->vsync_end),
> + priv->base + CRT_VERT1);
> +
> + /*
> + * Display Offset: address difference between consecutive scan lines
> + * Terminal Count: memory size of one scan line
> + */
> + d_offset = m->hdisplay * bpp / 8;
> + t_count = (m->hdisplay * bpp + 127) / 128;
> + writel(CRT_DISP_OFFSET(d_offset) | CRT_TERM_COUNT(t_count),
> + priv->base + CRT_OFFSET);
> +
> + /*
> + * Threshold: FIFO thresholds of refill and stop (16 byte chunks
> + * per line, rounded up)
> + */
> + writel(G5_CRT_THROD_VAL, priv->base + CRT_THROD);
> +}
> +
> +static void aspeed_gfx_pipe_enable(struct drm_simple_display_pipe *pipe,
> + struct drm_crtc_state *crtc_state,
> + struct drm_plane_state *plane_state)
> +{
> + struct aspeed_gfx *priv = drm_pipe_to_aspeed_gfx(pipe);
> + struct drm_crtc *crtc = &pipe->crtc;
> +
> + aspeed_gfx_crtc_mode_set_nofb(priv);
> + aspeed_gfx_enable_controller(priv);
> + drm_crtc_vblank_on(crtc);
> +}
> +
> +static void aspeed_gfx_pipe_disable(struct drm_simple_display_pipe *pipe)
> +{
> + struct aspeed_gfx *priv = drm_pipe_to_aspeed_gfx(pipe);
> + struct drm_crtc *crtc = &pipe->crtc;
> +
> + drm_crtc_vblank_off(crtc);
> + aspeed_gfx_disable_controller(priv);
> +}
> +
> +static void aspeed_gfx_pipe_update(struct drm_simple_display_pipe *pipe,
> + struct drm_plane_state *plane_state)
> +{
> + struct aspeed_gfx *priv = drm_pipe_to_aspeed_gfx(pipe);
> + struct drm_crtc *crtc = &pipe->crtc;
> + struct drm_framebuffer *fb = pipe->plane.state->fb;
> + struct drm_pending_vblank_event *event;
> + struct drm_gem_cma_object *gem;
> +
> + if (!crtc)
> + return;
> +
> + spin_lock_irq(&crtc->dev->event_lock);
> + event = crtc->state->event;
> + if (event) {
> + crtc->state->event = NULL;
> +
> + 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);
> +
> + if (!fb)
> + return;
> +
> + gem = drm_fb_cma_get_gem_obj(fb, 0);
> + if (!gem)
> + return;
> + writel(gem->paddr, priv->base + CRT_ADDR);
> +}
> +
> +static int aspeed_gfx_pipe_prepare_fb(struct drm_simple_display_pipe *pipe,
> + struct drm_plane_state *plane_state)
> +{
> + return drm_gem_fb_prepare_fb(&pipe->plane, plane_state);
> +}
drm_gem_fb_simple_display_pipe_prepare_fb
> +
> +static int aspeed_gfx_enable_vblank(struct drm_simple_display_pipe *pipe)
> +{
> + struct aspeed_gfx *priv = drm_pipe_to_aspeed_gfx(pipe);
> + u32 reg = readl(priv->base + CRT_CTRL1);
> +
> + /* Clear pending VBLANK IRQ */
> + writel(reg | CRT_CTRL_VERTICAL_INTR_STS, priv->base + CRT_CTRL1);
> +
> + reg |= CRT_CTRL_VERTICAL_INTR_EN;
> + writel(reg, priv->base + CRT_CTRL1);
> +
> + return 0;
> +}
> +
> +static void aspeed_gfx_disable_vblank(struct drm_simple_display_pipe *pipe)
> +{
> + struct aspeed_gfx *priv = drm_pipe_to_aspeed_gfx(pipe);
> + u32 reg = readl(priv->base + CRT_CTRL1);
> +
> + reg &= ~CRT_CTRL_VERTICAL_INTR_EN;
> + writel(reg, priv->base + CRT_CTRL1);
> +
> + /* Clear pending VBLANK IRQ */
> + writel(reg | CRT_CTRL_VERTICAL_INTR_STS, priv->base + CRT_CTRL1);
> +}
> +
> +static struct drm_simple_display_pipe_funcs aspeed_gfx_funcs = {
> + .enable = aspeed_gfx_pipe_enable,
> + .disable = aspeed_gfx_pipe_disable,
> + .update = aspeed_gfx_pipe_update,
> + .prepare_fb = aspeed_gfx_pipe_prepare_fb,
> + .enable_vblank = aspeed_gfx_enable_vblank,
> + .disable_vblank = aspeed_gfx_disable_vblank,
> +};
> +
> +static const uint32_t aspeed_gfx_formats[] = {
> + DRM_FORMAT_XRGB8888,
> + DRM_FORMAT_RGB565,
> +};
> +
> +int aspeed_gfx_create_pipe(struct drm_device *drm)
> +{
> + struct aspeed_gfx *priv = drm->dev_private;
> +
> + return drm_simple_display_pipe_init(drm, &priv->pipe, &aspeed_gfx_funcs,
> + aspeed_gfx_formats,
> + ARRAY_SIZE(aspeed_gfx_formats),
> + NULL,
> + &priv->connector);
> +}
> diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
> new file mode 100644
> index 000000000000..6b88d658ac1f
> --- /dev/null
> +++ b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
> @@ -0,0 +1,269 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +// Copyright 2018 IBM Corporation
> +
> +#include <linux/module.h>
> +#include <linux/irq.h>
> +#include <linux/clk.h>
> +#include <linux/of.h>
> +#include <linux/of_reserved_mem.h>
> +#include <linux/reset.h>
> +#include <linux/regmap.h>
> +#include <linux/mfd/syscon.h>
> +
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_device.h>
> +#include <drm/drm_fb_cma_helper.h>
> +#include <drm/drm_fb_helper.h>
> +#include <drm/drm_gem_cma_helper.h>
> +#include <drm/drm_gem_framebuffer_helper.h>
> +#include <drm/drm_simple_kms_helper.h>
> +#include <drm/drm_probe_helper.h>
> +
> +#include "aspeed_gfx.h"
> +
> +/**
> + * DOC: ASPEED GFX Driver
> + *
> + * This driver is for the ASPEED BMC SoC's GFX display hardware. This
> + * driver runs on the ARM based BMC systems, unlike the ast driver which
> + * runs on a host CPU and is is for a PCI graphics device.
> + *
> + * The AST2500 supports a total of 3 output paths:
> + *
> + * 1. VGA output, the output target can choose either or both to the DAC
> + * or DVO interface.
> + *
> + * 2. Graphics CRT output, the output target can choose either or both to
> + * the DAC or DVO interface.
> + *
> + * 3. Video input from DVO, the video input can be used for video engine
> + * capture or DAC display output.
> + *
> + * Output options are selected in SCU2C.
> + *
> + * The "VGA mode" device is the PCI attached controller. The "Graphics CRT"
> + * is the ARM's internal display controller.
> + *
> + * The driver only supports a simple configuration consisting of a 40MHz
> + * pixel clock, fixed by hardware limitations, and the VGA output path.
> + */
> +
> +static const struct drm_mode_config_funcs aspeed_gfx_mode_config_funcs = {
> + .fb_create = drm_gem_fb_create,
> + .atomic_check = drm_atomic_helper_check,
> + .atomic_commit = drm_atomic_helper_commit,
> +};
> +
> +static void aspeed_gfx_setup_mode_config(struct drm_device *drm)
> +{
> + drm_mode_config_init(drm);
> +
> + drm->mode_config.min_width = 0;
> + drm->mode_config.min_height = 0;
> + drm->mode_config.max_width = 800;
> + drm->mode_config.max_height = 600;
> + drm->mode_config.funcs = &aspeed_gfx_mode_config_funcs;
> +}
> +
> +static irqreturn_t aspeed_gfx_irq_handler(int irq, void *data)
> +{
> + struct drm_device *drm = data;
> + struct aspeed_gfx *priv = drm->dev_private;
> + u32 reg;
> +
> + reg = readl(priv->base + CRT_CTRL1);
> +
> + if (reg & CRT_CTRL_VERTICAL_INTR_STS) {
> + drm_crtc_handle_vblank(&priv->pipe.crtc);
> + writel(reg, priv->base + CRT_CTRL1);
> + return IRQ_HANDLED;
> + }
> +
> + return IRQ_NONE;
> +}
> +
> +
> +
> +static int aspeed_gfx_load(struct drm_device *drm)
> +{
> + struct platform_device *pdev = to_platform_device(drm->dev);
> + struct aspeed_gfx *priv;
> + struct resource *res;
> + int ret;
> +
> + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> + drm->dev_private = priv;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + priv->base = devm_ioremap_resource(drm->dev, res);
> + if (IS_ERR(priv->base))
> + return PTR_ERR(priv->base);
> +
> + priv->scu = syscon_regmap_lookup_by_compatible("aspeed,ast2500-scu");
> + if (IS_ERR(priv->scu)) {
> + dev_err(&pdev->dev, "failed to find SCU regmap\n");
> + return PTR_ERR(priv->scu);
> + }
> +
> + ret = of_reserved_mem_device_init(drm->dev);
> + if (ret) {
> + dev_err(&pdev->dev,
> + "failed to initialize reserved mem: %d\n", ret);
> + return ret;
> + }
> +
> + ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
> + if (ret) {
> + dev_err(&pdev->dev, "failed to set DMA mask: %d\n", ret);
> + return ret;
> + }
> +
> + priv->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL);
> + if (IS_ERR(priv->rst)) {
> + dev_err(&pdev->dev,
> + "missing or invalid reset controller device tree entry");
> + return PTR_ERR(priv->rst);
> + }
> + reset_control_deassert(priv->rst);
> +
> + priv->clk = devm_clk_get(drm->dev, NULL);
> + if (IS_ERR(priv->clk)) {
> + dev_err(&pdev->dev,
> + "missing or invalid clk device tree entry");
> + return PTR_ERR(priv->clk);
> + }
> + clk_prepare_enable(priv->clk);
> +
> + /* Sanitize control registers */
> + writel(0, priv->base + CRT_CTRL1);
> + writel(0, priv->base + CRT_CTRL2);
> +
> + aspeed_gfx_setup_mode_config(drm);
> +
> + ret = drm_vblank_init(drm, 1);
> + if (ret < 0) {
> + dev_err(drm->dev, "Failed to initialise vblank\n");
> + return ret;
> + }
> +
> + ret = aspeed_gfx_create_output(drm);
> + if (ret < 0) {
> + dev_err(drm->dev, "Failed to create outputs\n");
> + return ret;
> + }
> +
> + ret = aspeed_gfx_create_pipe(drm);
> + if (ret < 0) {
> + dev_err(drm->dev, "Cannot setup simple display pipe\n");
> + return ret;
> + }
> +
> + ret = devm_request_irq(drm->dev, platform_get_irq(pdev, 0),
> + aspeed_gfx_irq_handler, 0, "aspeed gfx", drm);
> + if (ret < 0) {
> + dev_err(drm->dev, "Failed to install IRQ handler\n");
> + return ret;
> + }
> +
> + drm_mode_config_reset(drm);
> +
> + drm_fbdev_generic_setup(drm, 32);
> +
> + return 0;
> +}
> +
> +static void aspeed_gfx_unload(struct drm_device *drm)
> +{
> + drm_kms_helper_poll_fini(drm);
> + drm_mode_config_cleanup(drm);
> +
> + drm->dev_private = NULL;
> +}
> +
> +DEFINE_DRM_GEM_CMA_FOPS(fops);
> +
> +static struct drm_driver aspeed_gfx_driver = {
> + .driver_features = DRIVER_GEM | DRIVER_MODESET |
> + DRIVER_PRIME | DRIVER_ATOMIC |
> + DRIVER_HAVE_IRQ,
> + .gem_free_object_unlocked = drm_gem_cma_free_object,
> + .gem_vm_ops = &drm_gem_cma_vm_ops,
> + .dumb_create = drm_gem_cma_dumb_create,
> + .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
> + .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
> + .gem_prime_export = drm_gem_prime_export,
> + .gem_prime_import = drm_gem_prime_import,
> + .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,
> + .fops = &fops,
> + .name = "aspeed-gfx-drm",
> + .desc = "ASPEED GFX DRM",
> + .date = "20180319",
> + .major = 1,
> + .minor = 0,
> +};
> +
> +static const struct of_device_id aspeed_gfx_match[] = {
> + { .compatible = "aspeed,ast2400-gfx" },
> + { .compatible = "aspeed,ast2500-gfx" },
> + { }
> +};
> +
> +static int aspeed_gfx_probe(struct platform_device *pdev)
> +{
> + struct drm_device *drm;
> + int ret;
> +
> + drm = drm_dev_alloc(&aspeed_gfx_driver, &pdev->dev);
> + if (IS_ERR(drm))
> + return PTR_ERR(drm);
> +
> + ret = aspeed_gfx_load(drm);
> + if (ret)
> + goto err_free;
> +
> + ret = drm_dev_register(drm, 0);
> + if (ret)
> + goto err_unload;
> +
> + return 0;
> +
> +err_unload:
> + aspeed_gfx_unload(drm);
> +err_free:
> + drm_dev_put(drm);
> +
> + return ret;
> +}
> +
> +static int aspeed_gfx_remove(struct platform_device *pdev)
> +{
> + struct drm_device *drm = platform_get_drvdata(pdev);
> +
> + drm_dev_unregister(drm);
> + aspeed_gfx_unload(drm);
> + drm_dev_put(drm);
> +
> + return 0;
> +}
> +
> +static struct platform_driver aspeed_gfx_platform_driver = {
> + .probe = aspeed_gfx_probe,
> + .remove = aspeed_gfx_remove,
> + .driver = {
> + .name = "aspeed_gfx",
> + .of_match_table = aspeed_gfx_match,
> + },
> +};
> +
> +module_platform_driver(aspeed_gfx_platform_driver);
> +
> +MODULE_AUTHOR("Joel Stanley <joel@xxxxxxxxx>");
> +MODULE_DESCRIPTION("ASPEED BMC DRM/KMS driver");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_out.c b/drivers/gpu/drm/aspeed/aspeed_gfx_out.c
> new file mode 100644
> index 000000000000..7d2057e00056
> --- /dev/null
> +++ b/drivers/gpu/drm/aspeed/aspeed_gfx_out.c
> @@ -0,0 +1,49 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +// Copyright 2018 IBM Corporation
> +
> +#include <drm/drmP.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_connector.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_probe_helper.h>
> +
> +#include "aspeed_gfx.h"
> +
> +static int aspeed_gfx_get_modes(struct drm_connector *connector)
> +{
> + return drm_add_modes_noedid(connector, 800, 600);
Is this the only mode you do, or just a default? Iirc if you report
"connected", you'll get this as one of the fallback modes already.
> +}
> +
> +static const struct
> +drm_connector_helper_funcs aspeed_gfx_connector_helper_funcs = {
> + .get_modes = aspeed_gfx_get_modes,
> +};
> +
> +static void aspeed_gfx_connector_destroy(struct drm_connector *connector)
> +{
> + drm_connector_unregister(connector);
Only needed for hotunplugged connectors, drm_dev_unregister takes care of
this for you already.
> + drm_connector_cleanup(connector);
> +}
> +
> +static const struct drm_connector_funcs aspeed_gfx_connector_funcs = {
> + .fill_modes = drm_helper_probe_single_connector_modes,
> + .destroy = aspeed_gfx_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,
> +};
> +
> +int aspeed_gfx_create_output(struct drm_device *drm)
> +{
> + struct aspeed_gfx *priv = drm->dev_private;
> + int ret;
> +
> + priv->connector.dpms = DRM_MODE_DPMS_OFF;
> + priv->connector.polled = 0;
> + drm_connector_helper_add(&priv->connector,
> + &aspeed_gfx_connector_helper_funcs);
> + ret = drm_connector_init(drm, &priv->connector,
> + &aspeed_gfx_connector_funcs,
> + DRM_MODE_CONNECTOR_Unknown);
> + return ret;
> +}
> --
> 2.20.1
Very nice driver!
Acked-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
For merging/maintenance, do you want to put this into drm-misc?
https://drm.pages.freedesktop.org/maintainer-tools/committer-drm-misc.html#small-drivers
We could also officially put drm/ast in there, if you want to maintain
that too.
Either way, patch also needs a MAINTAINERS entry.
-Daniel
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
