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Message-ID: <20151202155757.GB972@e106497-lin.cambridge.arm.com>
Date: Wed, 2 Dec 2015 15:57:58 +0000
From: Liviu Dudau <Liviu.Dudau@....com>
To: David Airlie <airlied@...ux.ie>,
Catalin Marinas <catalin.marinas@....com>,
Will Deacon <will.deacon@....com>,
Rob Herring <robh+dt@...nel.org>,
Sudeep Holla <sudeep.holla@....com>,
Jon Medhurst <tixy@...aro.org>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>,
Rob Herring <robh@...nel.org>,
Russell King <rmk+kernel@....linux.org.uk>,
devicetree <devicetree@...r.kernel.org>,
Pawel Moll <pawel.moll@....com>, Arnd Bergmann <arnd@...db.de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Punit Agrawal <punit.agrawal@....com>,
LKML <linux-kernel@...r.kernel.org>,
DRI devel <dri-devel@...ts.freedesktop.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Robin Murphy <robin.murphy@....com>,
LAKML <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 2/4] drm: Add support for ARM's HDLCD controller.
On Wed, Dec 02, 2015 at 04:33:31PM +0100, Daniel Vetter wrote:
> On Wed, Dec 02, 2015 at 04:24:19PM +0100, Daniel Vetter wrote:
> > On Wed, Dec 02, 2015 at 12:23:00PM +0000, Liviu Dudau wrote:
> > > The HDLCD controller is a display controller that supports resolutions
> > > up to 4096x4096 pixels. It is present on various development boards
> > > produced by ARM Ltd and emulated by the latest Fast Models from the
> > > company.
> > >
> > > Cc: David Airlie <airlied@...ux.ie>
> > > Cc: Robin Murphy <robin.murphy@....com>
> > >
> > > Signed-off-by: Liviu Dudau <Liviu.Dudau@....com>
> >
> > A few small nitpicks below.
>
> I've forgotten to add Acked-by: Daniel Vetter <daniel.vetter@...ll.ch>
> with these all addressed.
Thanks! I'll make the changes and post them lately.
Best regards,
Liviu
> -Daniel
>
> >
> > > ---
> > > drivers/gpu/drm/Kconfig | 2 +
> > > drivers/gpu/drm/Makefile | 1 +
> > > drivers/gpu/drm/arm/Kconfig | 29 ++
> > > drivers/gpu/drm/arm/Makefile | 2 +
> > > drivers/gpu/drm/arm/hdlcd_crtc.c | 334 +++++++++++++++++++++++
> > > drivers/gpu/drm/arm/hdlcd_drv.c | 555 +++++++++++++++++++++++++++++++++++++++
> > > drivers/gpu/drm/arm/hdlcd_drv.h | 42 +++
> > > drivers/gpu/drm/arm/hdlcd_regs.h | 87 ++++++
> > > 8 files changed, 1052 insertions(+)
> > > create mode 100644 drivers/gpu/drm/arm/Kconfig
> > > create mode 100644 drivers/gpu/drm/arm/Makefile
> > > create mode 100644 drivers/gpu/drm/arm/hdlcd_crtc.c
> > > create mode 100644 drivers/gpu/drm/arm/hdlcd_drv.c
> > > create mode 100644 drivers/gpu/drm/arm/hdlcd_drv.h
> > > create mode 100644 drivers/gpu/drm/arm/hdlcd_regs.h
> > >
> > > diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> > > index c4bf9a1..3fd9124 100644
> > > --- a/drivers/gpu/drm/Kconfig
> > > +++ b/drivers/gpu/drm/Kconfig
> > > @@ -106,6 +106,8 @@ config DRM_TDFX
> > > Choose this option if you have a 3dfx Banshee or Voodoo3 (or later),
> > > graphics card. If M is selected, the module will be called tdfx.
> > >
> > > +source "drivers/gpu/drm/arm/Kconfig"
> > > +
> > > config DRM_R128
> > > tristate "ATI Rage 128"
> > > depends on DRM && PCI
> > > diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
> > > index 1e9ff4c..6b42d75 100644
> > > --- a/drivers/gpu/drm/Makefile
> > > +++ b/drivers/gpu/drm/Makefile
> > > @@ -35,6 +35,7 @@ CFLAGS_drm_trace_points.o := -I$(src)
> > >
> > > obj-$(CONFIG_DRM) += drm.o
> > > obj-$(CONFIG_DRM_MIPI_DSI) += drm_mipi_dsi.o
> > > +obj-$(CONFIG_DRM_ARM) += arm/
> > > obj-$(CONFIG_DRM_TTM) += ttm/
> > > obj-$(CONFIG_DRM_TDFX) += tdfx/
> > > obj-$(CONFIG_DRM_R128) += r128/
> > > diff --git a/drivers/gpu/drm/arm/Kconfig b/drivers/gpu/drm/arm/Kconfig
> > > new file mode 100644
> > > index 0000000..5e8c8a8
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/arm/Kconfig
> > > @@ -0,0 +1,29 @@
> > > +config DRM_ARM
> > > + bool "ARM Ltd. drivers"
> > > + depends on DRM && OF && (ARM || ARM64)
> > > + select DRM_KMS_HELPER
> > > + help
> > > + Choose this option to select drivers for ARM's devices
> > > +
> > > +config DRM_HDLCD
> > > + tristate "ARM HDLCD"
> > > + depends on DRM_ARM
> > > + depends on COMMON_CLK
> > > + select COMMON_CLK_SCPI
> > > + select DMA_CMA
> > > + select DRM_KMS_CMA_HELPER
> > > + select DRM_GEM_CMA_HELPER
> > > + help
> > > + Choose this option if you have an ARM High Definition Colour LCD
> > > + controller.
> > > +
> > > + If M is selected the module will be called hdlcd.
> > > +
> > > +config DRM_HDLCD_SHOW_UNDERRUN
> > > + bool "Show underrun conditions"
> > > + depends on DRM_HDLCD
> > > + default n
> > > + help
> > > + Enable this option to show in red colour the pixels that the
> > > + HDLCD device did not fetch from framebuffer due to underrun
> > > + conditions.
> > > diff --git a/drivers/gpu/drm/arm/Makefile b/drivers/gpu/drm/arm/Makefile
> > > new file mode 100644
> > > index 0000000..89dcb7b
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/arm/Makefile
> > > @@ -0,0 +1,2 @@
> > > +hdlcd-y := hdlcd_drv.o hdlcd_crtc.o
> > > +obj-$(CONFIG_DRM_HDLCD) += hdlcd.o
> > > diff --git a/drivers/gpu/drm/arm/hdlcd_crtc.c b/drivers/gpu/drm/arm/hdlcd_crtc.c
> > > new file mode 100644
> > > index 0000000..350c1fe
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/arm/hdlcd_crtc.c
> > > @@ -0,0 +1,334 @@
> > > +/*
> > > + * Copyright (C) 2013-2015 ARM Limited
> > > + * Author: Liviu Dudau <Liviu.Dudau@....com>
> > > + *
> > > + * This file is subject to the terms and conditions of the GNU General Public
> > > + * License. See the file COPYING in the main directory of this archive
> > > + * for more details.
> > > + *
> > > + * Implementation of a CRTC class for the HDLCD driver.
> > > + */
> > > +
> > > +#include <drm/drmP.h>
> > > +#include <drm/drm_atomic_helper.h>
> > > +#include <drm/drm_crtc.h>
> > > +#include <drm/drm_crtc_helper.h>
> > > +#include <drm/drm_fb_helper.h>
> > > +#include <drm/drm_fb_cma_helper.h>
> > > +#include <drm/drm_gem_cma_helper.h>
> > > +#include <drm/drm_of.h>
> > > +#include <drm/drm_plane_helper.h>
> > > +#include <linux/clk.h>
> > > +#include <linux/of_graph.h>
> > > +#include <linux/platform_data/simplefb.h>
> > > +#include <video/videomode.h>
> > > +
> > > +#include "hdlcd_drv.h"
> > > +#include "hdlcd_regs.h"
> > > +
> > > +/*
> > > + * The HDLCD controller is a dumb RGB streamer that gets connected to
> > > + * a single HDMI transmitter or in the case of the ARM Models it gets
> > > + * emulated by the software that does the actual rendering.
> > > + *
> > > + */
> > > +
> > > +static const struct drm_crtc_funcs hdlcd_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 struct simplefb_format supported_formats[] = SIMPLEFB_FORMATS;
> > > +
> > > +/*
> > > + * Setup the HDLCD registers for decoding the pixels out of the framebuffer
> > > + */
> > > +static int hdlcd_set_pxl_fmt(struct drm_crtc *crtc)
> > > +{
> > > + unsigned int btpp, default_color = 0x00000000;
> > > + struct hdlcd_drm_private *hdlcd = crtc_to_hdlcd_priv(crtc);
> > > + uint32_t pixel_format;
> > > + struct simplefb_format *format = NULL;
> > > + int i;
> > > +
> > > +#ifdef CONFIG_DRM_HDLCD_SHOW_UNDERRUN
> > > + default_color = 0x00ff0000; /* show underruns in red */
> > > +#endif
> > > +
> > > + if (!crtc->primary->state->fb) {
> > > + DRM_ERROR("No fb associated with state %p\n",
> > > + crtc->primary->state);
> > > + return -EINVAL;
> >
> > The higher-level ->mode_set_nofb can't fail and you're violating this
> > here. Correct fix in atomic is to check in your crtc->atomic_check that
> > there's always a primary fb set. Since that's a small dance (you need to
> > grab the primary plane state first) might be good to extract it into a
> > small helper, but not really needed.
> >
> > Here you should WARN_ON if this ever happens and just return (without
> > trying to track an error code), since it's too late already.
> >
> > > + }
> > > +
> > > + pixel_format = crtc->primary->state->fb->pixel_format;
> > > +
> > > + for (i = 0; i < ARRAY_SIZE(supported_formats); i++) {
> > > + if (supported_formats[i].fourcc == pixel_format)
> > > + format = &supported_formats[i];
> > > + }
> > > +
> > > + if (!format) {
> > > + DRM_ERROR("Format not supported: 0x%x\n", pixel_format);
> > > + return -EINVAL;
> > > + }
> >
> > Same here. Although this should be impossible, with atomic the
> > core/helpers pre-check the pixel format against the format table you
> > register on the (primary) plane already. So just WARN_ON + bailing out.
> >
> > > +
> > > + /* HDLCD uses 'bytes per pixel', zero means 1 byte */
> > > + btpp = (format->bits_per_pixel + 7) / 8;
> > > + hdlcd_write(hdlcd, HDLCD_REG_PIXEL_FORMAT, (btpp - 1) << 3);
> > > +
> > > + /*
> > > + * The format of the HDLCD_REG_<color>_SELECT register is:
> > > + * - bits[23:16] - default value for that color component
> > > + * - bits[11:8] - number of bits to extract for each color component
> > > + * - bits[4:0] - index of the lowest bit to extract
> > > + *
> > > + * The default color value is used when bits[11:8] are zero, when the
> > > + * pixel is outside the visible frame area or when there is a
> > > + * buffer underrun.
> > > + */
> > > + hdlcd_write(hdlcd, HDLCD_REG_RED_SELECT, default_color |
> > > + format->red.offset | (format->red.length & 0xf) << 8);
> > > + hdlcd_write(hdlcd, HDLCD_REG_GREEN_SELECT, default_color |
> > > + format->green.offset | (format->green.length & 0xf) << 8);
> > > + hdlcd_write(hdlcd, HDLCD_REG_BLUE_SELECT, default_color |
> > > + format->blue.offset | (format->blue.length & 0xf) << 8);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static void hdlcd_crtc_mode_set_nofb(struct drm_crtc *crtc)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = crtc_to_hdlcd_priv(crtc);
> > > + struct drm_display_mode *m = &crtc->state->adjusted_mode;
> > > + struct videomode vm;
> > > + unsigned int polarities, line_length, err;
> > > +
> > > + vm.vfront_porch = m->crtc_vsync_start - m->crtc_vdisplay;
> > > + vm.vback_porch = m->crtc_vtotal - m->crtc_vsync_end;
> > > + vm.vsync_len = m->crtc_vsync_end - m->crtc_vsync_start;
> > > + vm.hfront_porch = m->crtc_hsync_start - m->crtc_hdisplay;
> > > + vm.hback_porch = m->crtc_htotal - m->crtc_hsync_end;
> > > + vm.hsync_len = m->crtc_hsync_end - m->crtc_hsync_start;
> > > +
> > > + polarities = HDLCD_POLARITY_DATAEN | HDLCD_POLARITY_DATA;
> > > +
> > > + if (m->flags & DRM_MODE_FLAG_PHSYNC)
> > > + polarities |= HDLCD_POLARITY_HSYNC;
> > > + if (m->flags & DRM_MODE_FLAG_PVSYNC)
> > > + polarities |= HDLCD_POLARITY_VSYNC;
> > > +
> > > + line_length = crtc->primary->state->fb->pitches[0];
> > > +
> > > + /* Allow max number of outstanding requests and largest burst size */
> > > + hdlcd_write(hdlcd, HDLCD_REG_BUS_OPTIONS,
> > > + HDLCD_BUS_MAX_OUTSTAND | HDLCD_BUS_BURST_16);
> > > +
> > > + hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_LENGTH, line_length);
> > > + hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_PITCH, line_length);
> > > + hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_COUNT, m->crtc_vdisplay - 1);
> > > + hdlcd_write(hdlcd, HDLCD_REG_V_DATA, m->crtc_vdisplay - 1);
> > > + hdlcd_write(hdlcd, HDLCD_REG_V_BACK_PORCH, vm.vback_porch - 1);
> > > + hdlcd_write(hdlcd, HDLCD_REG_V_FRONT_PORCH, vm.vfront_porch - 1);
> > > + hdlcd_write(hdlcd, HDLCD_REG_V_SYNC, vm.vsync_len - 1);
> > > + hdlcd_write(hdlcd, HDLCD_REG_H_BACK_PORCH, vm.hback_porch - 1);
> > > + hdlcd_write(hdlcd, HDLCD_REG_H_FRONT_PORCH, vm.hfront_porch - 1);
> > > + hdlcd_write(hdlcd, HDLCD_REG_H_SYNC, vm.hsync_len - 1);
> > > + hdlcd_write(hdlcd, HDLCD_REG_H_DATA, m->crtc_hdisplay - 1);
> > > + hdlcd_write(hdlcd, HDLCD_REG_POLARITIES, polarities);
> > > +
> > > + err = hdlcd_set_pxl_fmt(crtc);
> > > + if (err)
> > > + return;
> > > +
> > > + clk_set_rate(hdlcd->clk, m->crtc_clock * 1000);
> > > +}
> > > +
> > > +static void hdlcd_crtc_enable(struct drm_crtc *crtc)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = crtc_to_hdlcd_priv(crtc);
> > > +
> > > + clk_prepare_enable(hdlcd->clk);
> > > + hdlcd_write(hdlcd, HDLCD_REG_COMMAND, 1);
> > > + drm_crtc_vblank_on(crtc);
> > > +}
> > > +
> > > +static void hdlcd_crtc_disable(struct drm_crtc *crtc)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = crtc_to_hdlcd_priv(crtc);
> > > +
> > > + if (!crtc->primary->fb)
> > > + return;
> > > +
> > > + clk_disable_unprepare(hdlcd->clk);
> > > + hdlcd_write(hdlcd, HDLCD_REG_COMMAND, 0);
> > > + drm_crtc_vblank_off(crtc);
> > > +}
> > > +
> > > +static int hdlcd_crtc_atomic_check(struct drm_crtc *crtc,
> > > + struct drm_crtc_state *state)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = crtc_to_hdlcd_priv(crtc);
> > > + struct drm_display_mode *mode = &state->adjusted_mode;
> > > + long rate, clk_rate = mode->clock * 1000;
> > > +
> > > + rate = clk_round_rate(hdlcd->clk, clk_rate);
> > > + if (rate != clk_rate) {
> > > + /* clock required by mode not supported by hardware */
> > > + return -EINVAL;
> > > + }
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static void hdlcd_crtc_atomic_begin(struct drm_crtc *crtc,
> > > + struct drm_crtc_state *state)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = crtc_to_hdlcd_priv(crtc);
> > > + unsigned long flags;
> > > +
> > > + if (crtc->state->event) {
> > > + crtc->state->event->pipe = drm_crtc_index(crtc);
> > > +
> > > + WARN_ON(drm_crtc_vblank_get(crtc) != 0);
> > > +
> > > + spin_lock_irqsave(&crtc->dev->event_lock, flags);
> > > + hdlcd->event = crtc->state->event;
> > > + spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
> > > + crtc->state->event = NULL;
> > > + }
> > > +}
> > > +
> > > +static void hdlcd_crtc_atomic_flush(struct drm_crtc *crtc,
> > > + struct drm_crtc_state *state)
> > > +{
> > > +}
> > > +
> > > +static bool hdlcd_crtc_mode_fixup(struct drm_crtc *crtc,
> > > + const struct drm_display_mode *mode,
> > > + struct drm_display_mode *adjusted_mode)
> > > +{
> > > + return true;
> > > +}
> > > +
> > > +static const struct drm_crtc_helper_funcs hdlcd_crtc_helper_funcs = {
> > > + .mode_fixup = hdlcd_crtc_mode_fixup,
> > > + .mode_set = drm_helper_crtc_mode_set,
> > > + .mode_set_base = drm_helper_crtc_mode_set_base,
> > > + .mode_set_nofb = hdlcd_crtc_mode_set_nofb,
> > > + .enable = hdlcd_crtc_enable,
> > > + .disable = hdlcd_crtc_disable,
> > > + .prepare = hdlcd_crtc_disable,
> > > + .commit = hdlcd_crtc_enable,
> > > + .atomic_check = hdlcd_crtc_atomic_check,
> > > + .atomic_begin = hdlcd_crtc_atomic_begin,
> > > + .atomic_flush = hdlcd_crtc_atomic_flush,
> > > +};
> > > +
> > > +static int hdlcd_plane_atomic_check(struct drm_plane *plane,
> > > + struct drm_plane_state *state)
> > > +{
> > > + return 0;
> > > +}
> > > +
> > > +static void hdlcd_plane_atomic_update(struct drm_plane *plane,
> > > + struct drm_plane_state *state)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd;
> > > + struct drm_gem_cma_object *gem;
> > > + dma_addr_t scanout_start;
> > > +
> > > + if (!plane->state->crtc || !plane->state->fb)
> > > + return;
> > > +
> > > + hdlcd = crtc_to_hdlcd_priv(plane->state->crtc);
> > > + gem = drm_fb_cma_get_gem_obj(plane->state->fb, 0);
> > > + scanout_start = gem->paddr;
> > > + hdlcd_write(hdlcd, HDLCD_REG_FB_BASE, scanout_start);
> > > +}
> > > +
> > > +static const struct drm_plane_helper_funcs hdlcd_plane_helper_funcs = {
> > > + .prepare_fb = NULL,
> > > + .cleanup_fb = NULL,
> > > + .atomic_check = hdlcd_plane_atomic_check,
> > > + .atomic_update = hdlcd_plane_atomic_update,
> > > +};
> > > +
> > > +static void hdlcd_plane_destroy(struct drm_plane *plane)
> > > +{
> > > + drm_plane_helper_disable(plane);
> > > + drm_plane_cleanup(plane);
> > > +}
> > > +
> > > +static const struct drm_plane_funcs hdlcd_plane_funcs = {
> > > + .update_plane = drm_atomic_helper_update_plane,
> > > + .disable_plane = drm_atomic_helper_disable_plane,
> > > + .destroy = hdlcd_plane_destroy,
> > > + .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 struct drm_plane *hdlcd_plane_init(struct drm_device *drm)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > + struct drm_plane *plane = NULL;
> > > + u32 formats[ARRAY_SIZE(supported_formats)], i;
> > > + int ret;
> > > +
> > > + plane = devm_kzalloc(drm->dev, sizeof(*plane), GFP_KERNEL);
> > > + if (!plane)
> > > + return ERR_PTR(-ENOMEM);
> > > +
> > > + for (i = 0; i < ARRAY_SIZE(supported_formats); i++)
> > > + formats[i] = supported_formats[i].fourcc;
> > > +
> > > + ret = drm_universal_plane_init(drm, plane, 0xff, &hdlcd_plane_funcs,
> > > + formats, ARRAY_SIZE(formats),
> > > + DRM_PLANE_TYPE_PRIMARY);
> > > + if (ret) {
> > > + devm_kfree(drm->dev, plane);
> > > + return ERR_PTR(ret);
> > > + }
> > > +
> > > + drm_plane_helper_add(plane, &hdlcd_plane_helper_funcs);
> > > + hdlcd->plane = plane;
> > > +
> > > + return plane;
> > > +}
> > > +
> > > +void hdlcd_crtc_suspend(struct drm_crtc *crtc)
> > > +{
> > > + hdlcd_crtc_disable(crtc);
> > > +}
> > > +
> > > +void hdlcd_crtc_resume(struct drm_crtc *crtc)
> > > +{
> > > + hdlcd_crtc_enable(crtc);
> > > +}
> > > +
> > > +int hdlcd_setup_crtc(struct drm_device *drm)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > + struct drm_plane *primary;
> > > + int ret;
> > > +
> > > + primary = hdlcd_plane_init(drm);
> > > + if (IS_ERR(primary))
> > > + return PTR_ERR(primary);
> > > +
> > > + ret = drm_crtc_init_with_planes(drm, &hdlcd->crtc, primary, NULL,
> > > + &hdlcd_crtc_funcs);
> > > + if (ret) {
> > > + hdlcd_plane_destroy(primary);
> > > + devm_kfree(drm->dev, primary);
> > > + return ret;
> > > + }
> > > +
> > > + drm_crtc_helper_add(&hdlcd->crtc, &hdlcd_crtc_helper_funcs);
> > > + return 0;
> > > +}
> > > diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c
> > > new file mode 100644
> > > index 0000000..45440b1
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/arm/hdlcd_drv.c
> > > @@ -0,0 +1,555 @@
> > > +/*
> > > + * Copyright (C) 2013-2015 ARM Limited
> > > + * Author: Liviu Dudau <Liviu.Dudau@....com>
> > > + *
> > > + * This file is subject to the terms and conditions of the GNU General Public
> > > + * License. See the file COPYING in the main directory of this archive
> > > + * for more details.
> > > + *
> > > + * ARM HDLCD Driver
> > > + */
> > > +
> > > +#include <linux/module.h>
> > > +#include <linux/spinlock.h>
> > > +#include <linux/clk.h>
> > > +#include <linux/component.h>
> > > +#include <linux/of_graph.h>
> > > +#include <linux/of_reserved_mem.h>
> > > +#include <linux/pm_runtime.h>
> > > +
> > > +#include <drm/drmP.h>
> > > +#include <drm/drm_atomic_helper.h>
> > > +#include <drm/drm_crtc.h>
> > > +#include <drm/drm_crtc_helper.h>
> > > +#include <drm/drm_fb_helper.h>
> > > +#include <drm/drm_fb_cma_helper.h>
> > > +#include <drm/drm_gem_cma_helper.h>
> > > +#include <drm/drm_of.h>
> > > +
> > > +#include "hdlcd_drv.h"
> > > +#include "hdlcd_regs.h"
> > > +
> > > +static int compare_dev(struct device *dev, void *data)
> > > +{
> > > + return dev->of_node == data;
> > > +}
> > > +
> > > +static int hdlcd_load(struct drm_device *drm, unsigned long flags)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > + struct platform_device *pdev = to_platform_device(drm->dev);
> > > + struct resource *res;
> > > + u32 version;
> > > + int ret;
> > > +
> > > + hdlcd->clk = devm_clk_get(drm->dev, "pxlclk");
> > > + if (IS_ERR(hdlcd->clk))
> > > + return PTR_ERR(hdlcd->clk);
> > > +
> > > +#ifdef CONFIG_DEBUG_FS
> > > + atomic_set(&hdlcd->buffer_underrun_count, 0);
> > > + atomic_set(&hdlcd->bus_error_count, 0);
> > > + atomic_set(&hdlcd->vsync_count, 0);
> > > + atomic_set(&hdlcd->dma_end_count, 0);
> > > +#endif
> > > +
> > > + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > > + hdlcd->mmio = devm_ioremap_resource(drm->dev, res);
> > > + if (IS_ERR(hdlcd->mmio)) {
> > > + DRM_ERROR("failed to map control registers area\n");
> > > + ret = PTR_ERR(hdlcd->mmio);
> > > + hdlcd->mmio = NULL;
> > > + goto fail;
> > > + }
> > > +
> > > + version = hdlcd_read(hdlcd, HDLCD_REG_VERSION);
> > > + if ((version & HDLCD_PRODUCT_MASK) != HDLCD_PRODUCT_ID) {
> > > + DRM_ERROR("unknown product id: 0x%x\n", version);
> > > + ret = -EINVAL;
> > > + goto fail;
> > > + }
> > > + DRM_INFO("found ARM HDLCD version r%dp%d\n",
> > > + (version & HDLCD_VERSION_MAJOR_MASK) >> 8,
> > > + version & HDLCD_VERSION_MINOR_MASK);
> > > +
> > > + /* Get the optional framebuffer memory resource */
> > > + ret = of_reserved_mem_device_init(drm->dev);
> > > + if (ret && ret != -ENODEV)
> > > + goto fail;
> > > +
> > > + ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
> > > + if (ret)
> > > + goto setup_fail;
> > > +
> > > + ret = hdlcd_setup_crtc(drm);
> > > + if (ret < 0) {
> > > + DRM_ERROR("failed to create crtc\n");
> > > + goto setup_fail;
> > > + }
> > > +
> > > + pm_runtime_enable(drm->dev);
> > > +
> > > + pm_runtime_get_sync(drm->dev);
> > > + ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
> > > + pm_runtime_put_sync(drm->dev);
> > > + if (ret < 0) {
> > > + DRM_ERROR("failed to install IRQ handler\n");
> > > + goto irq_fail;
> > > + }
> > > +
> > > + return 0;
> > > +
> > > +irq_fail:
> > > + drm_crtc_cleanup(&hdlcd->crtc);
> > > +setup_fail:
> > > + of_reserved_mem_device_release(drm->dev);
> > > +fail:
> > > + devm_clk_put(drm->dev, hdlcd->clk);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static void hdlcd_fb_output_poll_changed(struct drm_device *drm)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > +
> > > + if (hdlcd->fbdev) {
> > > + drm_fbdev_cma_hotplug_event(hdlcd->fbdev);
> > > + }
> > > +}
> > > +
> > > +static const struct drm_mode_config_funcs hdlcd_mode_config_funcs = {
> > > + .fb_create = drm_fb_cma_create,
> > > + .output_poll_changed = hdlcd_fb_output_poll_changed,
> > > + .atomic_check = drm_atomic_helper_check,
> > > + .atomic_commit = drm_atomic_helper_commit,
> > > +};
> > > +
> > > +static void hdlcd_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 = HDLCD_MAX_XRES;
> > > + drm->mode_config.max_height = HDLCD_MAX_YRES;
> > > + drm->mode_config.funcs = &hdlcd_mode_config_funcs;
> > > +}
> > > +
> > > +static void hdlcd_preclose(struct drm_device *drm, struct drm_file *file)
> > > +{
> > > +}
> > > +
> > > +static void hdlcd_lastclose(struct drm_device *drm)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > +
> > > + drm_fbdev_cma_restore_mode(hdlcd->fbdev);
> > > +}
> > > +
> > > +static irqreturn_t hdlcd_irq(int irq, void *arg)
> > > +{
> > > + struct drm_device *drm = arg;
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > + unsigned long irq_status;
> > > +
> > > + irq_status = hdlcd_read(hdlcd, HDLCD_REG_INT_STATUS);
> > > +
> > > +#ifdef CONFIG_DEBUG_FS
> > > + if (irq_status & HDLCD_INTERRUPT_UNDERRUN) {
> > > + atomic_inc(&hdlcd->buffer_underrun_count);
> > > + }
> > > + if (irq_status & HDLCD_INTERRUPT_DMA_END) {
> > > + atomic_inc(&hdlcd->dma_end_count);
> > > + }
> > > + if (irq_status & HDLCD_INTERRUPT_BUS_ERROR) {
> > > + atomic_inc(&hdlcd->bus_error_count);
> > > + }
> > > + if (irq_status & HDLCD_INTERRUPT_VSYNC) {
> > > + atomic_inc(&hdlcd->vsync_count);
> > > + }
> > > +#endif
> > > + if (irq_status & HDLCD_INTERRUPT_VSYNC) {
> > > + unsigned long flags;
> > > +
> > > + drm_handle_vblank(drm, 0);
> >
> > We have drm_crtc_ versions for this one ...
> > > +
> > > + spin_lock_irqsave(&drm->event_lock, flags);
> > > + if (hdlcd->event) {
> > > + drm_send_vblank_event(drm, hdlcd->event->pipe, hdlcd->event);
> >
> > and this one now too. New drivers shouldn't need to deal with the opaque
> > int pipe stuff any more on the caller sides, and real soon (hopefully)
> > we'll have hooks for the vblank stuff that take struct drm_crtc * too.
> >
> > I've quickly scrolled through the driver otherwise and didn't notice
> > anything else that should be updated to latest practices. Looks really
> > good.
> > -Daniel
> >
> > > + drm_crtc_vblank_put(&hdlcd->crtc);
> > > + hdlcd->event = NULL;
> > > + }
> > > + spin_unlock_irqrestore(&drm->event_lock, flags);
> > > + }
> > > +
> > > + /* acknowledge interrupt(s) */
> > > + hdlcd_write(hdlcd, HDLCD_REG_INT_CLEAR, irq_status);
> > > +
> > > + return IRQ_HANDLED;
> > > +}
> > > +
> > > +static void hdlcd_irq_preinstall(struct drm_device *drm)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > + /* Ensure interrupts are disabled */
> > > + hdlcd_write(hdlcd, HDLCD_REG_INT_MASK, 0);
> > > + hdlcd_write(hdlcd, HDLCD_REG_INT_CLEAR, ~0);
> > > +}
> > > +
> > > +static int hdlcd_irq_postinstall(struct drm_device *drm)
> > > +{
> > > +#ifdef CONFIG_DEBUG_FS
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > + unsigned long irq_mask = hdlcd_read(hdlcd, HDLCD_REG_INT_MASK);
> > > +
> > > + /* enable debug interrupts */
> > > + irq_mask |= HDLCD_DEBUG_INT_MASK;
> > > +
> > > + hdlcd_write(hdlcd, HDLCD_REG_INT_MASK, irq_mask);
> > > +#endif
> > > + return 0;
> > > +}
> > > +
> > > +static void hdlcd_irq_uninstall(struct drm_device *drm)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > + /* disable all the interrupts that we might have enabled */
> > > + unsigned long irq_mask = hdlcd_read(hdlcd, HDLCD_REG_INT_MASK);
> > > +
> > > +#ifdef CONFIG_DEBUG_FS
> > > + /* disable debug interrupts */
> > > + irq_mask &= ~HDLCD_DEBUG_INT_MASK;
> > > +#endif
> > > +
> > > + /* disable vsync interrupts */
> > > + irq_mask &= ~HDLCD_INTERRUPT_VSYNC;
> > > +
> > > + hdlcd_write(hdlcd, HDLCD_REG_INT_MASK, irq_mask);
> > > +}
> > > +
> > > +static int hdlcd_enable_vblank(struct drm_device *drm, unsigned int crtc)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > + unsigned int mask = hdlcd_read(hdlcd, HDLCD_REG_INT_MASK);
> > > +
> > > + hdlcd_write(hdlcd, HDLCD_REG_INT_MASK, mask | HDLCD_INTERRUPT_VSYNC);
> > > +
> > > + return 0;
> > > +}
> > > +
> > > +static void hdlcd_disable_vblank(struct drm_device *drm, unsigned int crtc)
> > > +{
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > + unsigned int mask = hdlcd_read(hdlcd, HDLCD_REG_INT_MASK);
> > > +
> > > + hdlcd_write(hdlcd, HDLCD_REG_INT_MASK, mask & ~HDLCD_INTERRUPT_VSYNC);
> > > +}
> > > +
> > > +#ifdef CONFIG_DEBUG_FS
> > > +static int hdlcd_show_underrun_count(struct seq_file *m, void *arg)
> > > +{
> > > + struct drm_info_node *node = (struct drm_info_node *)m->private;
> > > + struct drm_device *drm = node->minor->dev;
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > +
> > > + seq_printf(m, "underrun : %d\n", atomic_read(&hdlcd->buffer_underrun_count));
> > > + seq_printf(m, "dma_end : %d\n", atomic_read(&hdlcd->dma_end_count));
> > > + seq_printf(m, "bus_error: %d\n", atomic_read(&hdlcd->bus_error_count));
> > > + seq_printf(m, "vsync : %d\n", atomic_read(&hdlcd->vsync_count));
> > > + return 0;
> > > +}
> > > +
> > > +static int hdlcd_show_pxlclock(struct seq_file *m, void *arg)
> > > +{
> > > + struct drm_info_node *node = (struct drm_info_node *)m->private;
> > > + struct drm_device *drm = node->minor->dev;
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > + unsigned long clkrate = clk_get_rate(hdlcd->clk);
> > > + unsigned long mode_clock = hdlcd->crtc.mode.crtc_clock * 1000;
> > > +
> > > + seq_printf(m, "hw : %lu\n", clkrate);
> > > + seq_printf(m, "mode: %lu\n", mode_clock);
> > > + return 0;
> > > +}
> > > +
> > > +static struct drm_info_list hdlcd_debugfs_list[] = {
> > > + { "interrupt_count", hdlcd_show_underrun_count, 0 },
> > > + { "clocks", hdlcd_show_pxlclock, 0 },
> > > +};
> > > +
> > > +static int hdlcd_debugfs_init(struct drm_minor *minor)
> > > +{
> > > + return drm_debugfs_create_files(hdlcd_debugfs_list,
> > > + ARRAY_SIZE(hdlcd_debugfs_list), minor->debugfs_root, minor);
> > > +}
> > > +
> > > +static void hdlcd_debugfs_cleanup(struct drm_minor *minor)
> > > +{
> > > + drm_debugfs_remove_files(hdlcd_debugfs_list,
> > > + ARRAY_SIZE(hdlcd_debugfs_list), minor);
> > > +}
> > > +#endif
> > > +
> > > +static const struct file_operations fops = {
> > > + .owner = THIS_MODULE,
> > > + .open = drm_open,
> > > + .release = drm_release,
> > > + .unlocked_ioctl = drm_ioctl,
> > > +#ifdef CONFIG_COMPAT
> > > + .compat_ioctl = drm_compat_ioctl,
> > > +#endif
> > > + .poll = drm_poll,
> > > + .read = drm_read,
> > > + .llseek = noop_llseek,
> > > + .mmap = drm_gem_cma_mmap,
> > > +};
> > > +
> > > +static struct drm_driver hdlcd_driver = {
> > > + .driver_features = DRIVER_HAVE_IRQ | DRIVER_GEM |
> > > + DRIVER_MODESET | DRIVER_PRIME |
> > > + DRIVER_ATOMIC,
> > > + .preclose = hdlcd_preclose,
> > > + .lastclose = hdlcd_lastclose,
> > > + .irq_handler = hdlcd_irq,
> > > + .irq_preinstall = hdlcd_irq_preinstall,
> > > + .irq_postinstall = hdlcd_irq_postinstall,
> > > + .irq_uninstall = hdlcd_irq_uninstall,
> > > + .get_vblank_counter = drm_vblank_no_hw_counter,
> > > + .enable_vblank = hdlcd_enable_vblank,
> > > + .disable_vblank = hdlcd_disable_vblank,
> > > + .gem_free_object = drm_gem_cma_free_object,
> > > + .gem_vm_ops = &drm_gem_cma_vm_ops,
> > > + .dumb_create = drm_gem_cma_dumb_create,
> > > + .dumb_map_offset = drm_gem_cma_dumb_map_offset,
> > > + .dumb_destroy = drm_gem_dumb_destroy,
> > > + .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,
> > > +#ifdef CONFIG_DEBUG_FS
> > > + .debugfs_init = hdlcd_debugfs_init,
> > > + .debugfs_cleanup = hdlcd_debugfs_cleanup,
> > > +#endif
> > > + .fops = &fops,
> > > + .name = "hdlcd",
> > > + .desc = "ARM HDLCD Controller DRM",
> > > + .date = "20151021",
> > > + .major = 1,
> > > + .minor = 0,
> > > +};
> > > +
> > > +static int hdlcd_add_components(struct device *dev, struct master *master)
> > > +{
> > > + struct device_node *port, *ep = NULL;
> > > + int ret = -ENXIO;
> > > +
> > > + if (!dev->of_node)
> > > + return -ENODEV;
> > > +
> > > + do {
> > > + ep = of_graph_get_next_endpoint(dev->of_node, ep);
> > > + if (!ep)
> > > + break;
> > > +
> > > + if (!of_device_is_available(ep)) {
> > > + of_node_put(ep);
> > > + continue;
> > > + }
> > > +
> > > + port = of_graph_get_remote_port_parent(ep);
> > > + of_node_put(ep);
> > > + if (!port || !of_device_is_available(port)) {
> > > + of_node_put(port);
> > > + continue;
> > > + }
> > > +
> > > + ret = component_master_add_child(master, compare_dev, port);
> > > + of_node_put(port);
> > > + } while (1);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static int hdlcd_drm_bind(struct device *dev)
> > > +{
> > > + struct drm_device *drm;
> > > + struct hdlcd_drm_private *hdlcd;
> > > + int ret;
> > > +
> > > + hdlcd = devm_kzalloc(dev, sizeof(*hdlcd), GFP_KERNEL);
> > > + if (!hdlcd)
> > > + return -ENOMEM;
> > > +
> > > + drm = drm_dev_alloc(&hdlcd_driver, dev);
> > > + if (!drm)
> > > + return -ENOMEM;
> > > +
> > > + drm->dev_private = hdlcd;
> > > +
> > > + ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
> > > + if (ret)
> > > + goto err_free;
> > > +
> > > + hdlcd_setup_mode_config(drm);
> > > +
> > > + ret = hdlcd_load(drm, 0);
> > > + if (ret)
> > > + goto err_free;
> > > +
> > > + ret = drm_dev_register(drm, 0);
> > > + if (ret)
> > > + goto err_unload;
> > > +
> > > + dev_set_drvdata(dev, drm);
> > > +
> > > + ret = component_bind_all(dev, drm);
> > > + if (ret) {
> > > + DRM_ERROR("Failed to bind all components\n");
> > > + goto err_unregister;
> > > + }
> > > +
> > > + ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
> > > + if (ret < 0) {
> > > + DRM_ERROR("failed to initialise vblank\n");
> > > + goto err_vblank;
> > > + }
> > > + drm->vblank_disable_allowed = true;
> > > +
> > > + drm_mode_config_reset(drm);
> > > + drm_kms_helper_poll_init(drm);
> > > +
> > > + hdlcd->fbdev = drm_fbdev_cma_init(drm, 32, drm->mode_config.num_crtc,
> > > + drm->mode_config.num_connector);
> > > +
> > > + if (IS_ERR(hdlcd->fbdev)) {
> > > + ret = PTR_ERR(hdlcd->fbdev);
> > > + hdlcd->fbdev = NULL;
> > > + goto err_fbdev;
> > > + }
> > > +
> > > + return 0;
> > > +
> > > +err_fbdev:
> > > + drm_kms_helper_poll_fini(drm);
> > > + drm_mode_config_cleanup(drm);
> > > + drm_vblank_cleanup(drm);
> > > +err_vblank:
> > > + component_unbind_all(dev, drm);
> > > +err_unregister:
> > > + drm_dev_unregister(drm);
> > > +err_unload:
> > > + pm_runtime_get_sync(drm->dev);
> > > + drm_irq_uninstall(drm);
> > > + pm_runtime_put_sync(drm->dev);
> > > + pm_runtime_disable(drm->dev);
> > > + of_reserved_mem_device_release(drm->dev);
> > > + devm_clk_put(dev, hdlcd->clk);
> > > +err_free:
> > > + drm_dev_unref(drm);
> > > +
> > > + return ret;
> > > +}
> > > +
> > > +static void hdlcd_drm_unbind(struct device *dev)
> > > +{
> > > + struct drm_device *drm = dev_get_drvdata(dev);
> > > + struct hdlcd_drm_private *hdlcd = drm->dev_private;
> > > +
> > > + if (hdlcd->fbdev) {
> > > + drm_fbdev_cma_fini(hdlcd->fbdev);
> > > + hdlcd->fbdev = NULL;
> > > + }
> > > + drm_kms_helper_poll_fini(drm);
> > > + component_unbind_all(dev, drm);
> > > + drm_vblank_cleanup(drm);
> > > + pm_runtime_get_sync(drm->dev);
> > > + drm_irq_uninstall(drm);
> > > + pm_runtime_put_sync(drm->dev);
> > > + pm_runtime_disable(drm->dev);
> > > + of_reserved_mem_device_release(drm->dev);
> > > + if (!IS_ERR(hdlcd->clk)) {
> > > + devm_clk_put(drm->dev, hdlcd->clk);
> > > + hdlcd->clk = NULL;
> > > + }
> > > + drm_mode_config_cleanup(drm);
> > > + drm_dev_unregister(drm);
> > > + drm_dev_unref(drm);
> > > + drm->dev_private = NULL;
> > > + dev_set_drvdata(dev, NULL);
> > > +}
> > > +
> > > +static const struct component_master_ops hdlcd_master_ops = {
> > > + .add_components = hdlcd_add_components,
> > > + .bind = hdlcd_drm_bind,
> > > + .unbind = hdlcd_drm_unbind,
> > > +};
> > > +
> > > +static int hdlcd_probe(struct platform_device *pdev)
> > > +{
> > > + return component_master_add(&pdev->dev, &hdlcd_master_ops);
> > > +}
> > > +
> > > +static int hdlcd_remove(struct platform_device *pdev)
> > > +{
> > > + component_master_del(&pdev->dev, &hdlcd_master_ops);
> > > + return 0;
> > > +}
> > > +
> > > +static const struct of_device_id hdlcd_of_match[] = {
> > > + { .compatible = "arm,hdlcd" },
> > > + {},
> > > +};
> > > +MODULE_DEVICE_TABLE(of, hdlcd_of_match);
> > > +
> > > +static int hdlcd_pm_suspend(struct device *dev)
> > > +{
> > > + struct drm_device *drm = dev_get_drvdata(dev);
> > > + struct drm_crtc *crtc;
> > > +
> > > + if (pm_runtime_suspended(dev))
> > > + return 0;
> > > +
> > > + drm_modeset_lock_all(drm);
> > > + list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
> > > + hdlcd_crtc_suspend(crtc);
> > > + drm_modeset_unlock_all(drm);
> > > + return 0;
> > > +}
> > > +
> > > +static int hdlcd_pm_resume(struct device *dev)
> > > +{
> > > + struct drm_device *drm = dev_get_drvdata(dev);
> > > + struct drm_crtc *crtc;
> > > +
> > > + if (!pm_runtime_suspended(dev))
> > > + return 0;
> > > +
> > > + drm_modeset_lock_all(drm);
> > > + list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
> > > + hdlcd_crtc_resume(crtc);
> > > + drm_modeset_unlock_all(drm);
> > > + return 0;
> > > +}
> > > +
> > > +static SIMPLE_DEV_PM_OPS(hdlcd_pm_ops, hdlcd_pm_suspend, hdlcd_pm_resume);
> > > +
> > > +static struct platform_driver hdlcd_platform_driver = {
> > > + .probe = hdlcd_probe,
> > > + .remove = hdlcd_remove,
> > > + .driver = {
> > > + .name = "hdlcd",
> > > + .pm = &hdlcd_pm_ops,
> > > + .of_match_table = hdlcd_of_match,
> > > + },
> > > +};
> > > +
> > > +module_platform_driver(hdlcd_platform_driver);
> > > +
> > > +MODULE_AUTHOR("Liviu Dudau");
> > > +MODULE_DESCRIPTION("ARM HDLCD DRM driver");
> > > +MODULE_LICENSE("GPL v2");
> > > diff --git a/drivers/gpu/drm/arm/hdlcd_drv.h b/drivers/gpu/drm/arm/hdlcd_drv.h
> > > new file mode 100644
> > > index 0000000..f2eedfb
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/arm/hdlcd_drv.h
> > > @@ -0,0 +1,42 @@
> > > +/*
> > > + * ARM HDLCD Controller register definition
> > > + */
> > > +
> > > +#ifndef __HDLCD_DRV_H__
> > > +#define __HDLCD_DRV_H__
> > > +
> > > +struct hdlcd_drm_private {
> > > + void __iomem *mmio;
> > > + struct clk *clk;
> > > + struct drm_fbdev_cma *fbdev;
> > > + struct drm_framebuffer *fb;
> > > + struct drm_pending_vblank_event *event;
> > > + struct drm_crtc crtc;
> > > + struct drm_plane *plane;
> > > +#ifdef CONFIG_DEBUG_FS
> > > + atomic_t buffer_underrun_count;
> > > + atomic_t bus_error_count;
> > > + atomic_t vsync_count;
> > > + atomic_t dma_end_count;
> > > +#endif
> > > +};
> > > +
> > > +#define crtc_to_hdlcd_priv(x) container_of(x, struct hdlcd_drm_private, crtc)
> > > +
> > > +static inline void hdlcd_write(struct hdlcd_drm_private *hdlcd,
> > > + unsigned int reg, u32 value)
> > > +{
> > > + writel(value, hdlcd->mmio + reg);
> > > +}
> > > +
> > > +static inline u32 hdlcd_read(struct hdlcd_drm_private *hdlcd, unsigned int reg)
> > > +{
> > > + return readl(hdlcd->mmio + reg);
> > > +}
> > > +
> > > +int hdlcd_setup_crtc(struct drm_device *dev);
> > > +void hdlcd_set_scanout(struct hdlcd_drm_private *hdlcd);
> > > +void hdlcd_crtc_suspend(struct drm_crtc *crtc);
> > > +void hdlcd_crtc_resume(struct drm_crtc *crtc);
> > > +
> > > +#endif /* __HDLCD_DRV_H__ */
> > > diff --git a/drivers/gpu/drm/arm/hdlcd_regs.h b/drivers/gpu/drm/arm/hdlcd_regs.h
> > > new file mode 100644
> > > index 0000000..66799eb
> > > --- /dev/null
> > > +++ b/drivers/gpu/drm/arm/hdlcd_regs.h
> > > @@ -0,0 +1,87 @@
> > > +/*
> > > + * Copyright (C) 2013,2014 ARM Limited
> > > + *
> > > + * This file is subject to the terms and conditions of the GNU General Public
> > > + * License. See the file COPYING in the main directory of this archive
> > > + * for more details.
> > > + *
> > > + * ARM HDLCD Controller register definition
> > > + */
> > > +
> > > +#ifndef __HDLCD_REGS_H__
> > > +#define __HDLCD_REGS_H__
> > > +
> > > +/* register offsets */
> > > +#define HDLCD_REG_VERSION 0x0000 /* ro */
> > > +#define HDLCD_REG_INT_RAWSTAT 0x0010 /* rw */
> > > +#define HDLCD_REG_INT_CLEAR 0x0014 /* wo */
> > > +#define HDLCD_REG_INT_MASK 0x0018 /* rw */
> > > +#define HDLCD_REG_INT_STATUS 0x001c /* ro */
> > > +#define HDLCD_REG_FB_BASE 0x0100 /* rw */
> > > +#define HDLCD_REG_FB_LINE_LENGTH 0x0104 /* rw */
> > > +#define HDLCD_REG_FB_LINE_COUNT 0x0108 /* rw */
> > > +#define HDLCD_REG_FB_LINE_PITCH 0x010c /* rw */
> > > +#define HDLCD_REG_BUS_OPTIONS 0x0110 /* rw */
> > > +#define HDLCD_REG_V_SYNC 0x0200 /* rw */
> > > +#define HDLCD_REG_V_BACK_PORCH 0x0204 /* rw */
> > > +#define HDLCD_REG_V_DATA 0x0208 /* rw */
> > > +#define HDLCD_REG_V_FRONT_PORCH 0x020c /* rw */
> > > +#define HDLCD_REG_H_SYNC 0x0210 /* rw */
> > > +#define HDLCD_REG_H_BACK_PORCH 0x0214 /* rw */
> > > +#define HDLCD_REG_H_DATA 0x0218 /* rw */
> > > +#define HDLCD_REG_H_FRONT_PORCH 0x021c /* rw */
> > > +#define HDLCD_REG_POLARITIES 0x0220 /* rw */
> > > +#define HDLCD_REG_COMMAND 0x0230 /* rw */
> > > +#define HDLCD_REG_PIXEL_FORMAT 0x0240 /* rw */
> > > +#define HDLCD_REG_RED_SELECT 0x0244 /* rw */
> > > +#define HDLCD_REG_GREEN_SELECT 0x0248 /* rw */
> > > +#define HDLCD_REG_BLUE_SELECT 0x024c /* rw */
> > > +
> > > +/* version */
> > > +#define HDLCD_PRODUCT_ID 0x1CDC0000
> > > +#define HDLCD_PRODUCT_MASK 0xFFFF0000
> > > +#define HDLCD_VERSION_MAJOR_MASK 0x0000FF00
> > > +#define HDLCD_VERSION_MINOR_MASK 0x000000FF
> > > +
> > > +/* interrupts */
> > > +#define HDLCD_INTERRUPT_DMA_END (1 << 0)
> > > +#define HDLCD_INTERRUPT_BUS_ERROR (1 << 1)
> > > +#define HDLCD_INTERRUPT_VSYNC (1 << 2)
> > > +#define HDLCD_INTERRUPT_UNDERRUN (1 << 3)
> > > +#define HDLCD_DEBUG_INT_MASK (HDLCD_INTERRUPT_DMA_END | \
> > > + HDLCD_INTERRUPT_BUS_ERROR | \
> > > + HDLCD_INTERRUPT_UNDERRUN)
> > > +
> > > +/* polarities */
> > > +#define HDLCD_POLARITY_VSYNC (1 << 0)
> > > +#define HDLCD_POLARITY_HSYNC (1 << 1)
> > > +#define HDLCD_POLARITY_DATAEN (1 << 2)
> > > +#define HDLCD_POLARITY_DATA (1 << 3)
> > > +#define HDLCD_POLARITY_PIXELCLK (1 << 4)
> > > +
> > > +/* commands */
> > > +#define HDLCD_COMMAND_DISABLE (0 << 0)
> > > +#define HDLCD_COMMAND_ENABLE (1 << 0)
> > > +
> > > +/* pixel format */
> > > +#define HDLCD_PIXEL_FMT_LITTLE_ENDIAN (0 << 31)
> > > +#define HDLCD_PIXEL_FMT_BIG_ENDIAN (1 << 31)
> > > +#define HDLCD_BYTES_PER_PIXEL_MASK (3 << 3)
> > > +
> > > +/* bus options */
> > > +#define HDLCD_BUS_BURST_MASK 0x01f
> > > +#define HDLCD_BUS_MAX_OUTSTAND 0xf00
> > > +#define HDLCD_BUS_BURST_NONE (0 << 0)
> > > +#define HDLCD_BUS_BURST_1 (1 << 0)
> > > +#define HDLCD_BUS_BURST_2 (1 << 1)
> > > +#define HDLCD_BUS_BURST_4 (1 << 2)
> > > +#define HDLCD_BUS_BURST_8 (1 << 3)
> > > +#define HDLCD_BUS_BURST_16 (1 << 4)
> > > +
> > > +/* Max resolution supported is 4096x4096, 32bpp */
> > > +#define HDLCD_MAX_XRES 4096
> > > +#define HDLCD_MAX_YRES 4096
> > > +
> > > +#define NR_PALETTE 256
> > > +
> > > +#endif /* __HDLCD_REGS_H__ */
> > > --
> > > 2.6.2
> > >
> > > _______________________________________________
> > > dri-devel mailing list
> > > dri-devel@...ts.freedesktop.org
> > > http://lists.freedesktop.org/mailman/listinfo/dri-devel
> >
> > --
> > Daniel Vetter
> > Software Engineer, Intel Corporation
> > http://blog.ffwll.ch
>
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> http://blog.ffwll.ch
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
--
====================
| I would like to |
| fix the world, |
| but they're not |
| giving me the |
\ source code! /
---------------
¯\_(ツ)_/¯
--
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