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Message-ID: <20170222200947.3ikrhvv76ymfu5tv@lukather>
Date: Wed, 22 Feb 2017 12:09:47 -0800
From: Maxime Ripard <maxime.ripard@...e-electrons.com>
To: Icenowy Zheng <icenowy@...c.xyz>
Cc: Rob Herring <robh+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
Jernej Skrabec <jernej.skrabec@...l.net>,
David Airlie <airlied@...ux.ie>,
Jean-Francois Moine <moinejf@...e.fr>,
linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
dri-devel@...ts.freedesktop.org, linux-sunxi@...glegroups.com
Subject: Re: [PATCH 4/8] drm/sun4i: add support for sun8i DE2 mixers and
display engines
Hi,
On Wed, Feb 22, 2017 at 11:23:06PM +0800, Icenowy Zheng wrote:
> Allwinner have a new "Display Engine 2.0" in there new SoCs, which comes
> in a new "Display Engine" (mixers instead of old backends and
> frontends).
>
> Add support for the mixer on Allwinner V3s SoC; it's the simplest one.
>
> Signed-off-by: Icenowy Zheng <icenowy@...c.xyz>
> ---
> drivers/gpu/drm/sun4i/Kconfig | 8 +
> drivers/gpu/drm/sun4i/Makefile | 1 +
> drivers/gpu/drm/sun4i/sun4i_crtc.c | 6 +-
> drivers/gpu/drm/sun4i/sun4i_drv.c | 38 +++-
> drivers/gpu/drm/sun4i/sun4i_drv.h | 1 +
> drivers/gpu/drm/sun4i/sun4i_layer.c | 92 ++++++--
> drivers/gpu/drm/sun4i/sun4i_layer.h | 1 +
> drivers/gpu/drm/sun4i/sun8i_mixer.c | 417 ++++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/sun4i/sun8i_mixer.h | 133 ++++++++++++
> 9 files changed, 674 insertions(+), 23 deletions(-)
> create mode 100644 drivers/gpu/drm/sun4i/sun8i_mixer.c
> create mode 100644 drivers/gpu/drm/sun4i/sun8i_mixer.h
>
> diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
> index a4b357db8856..8df401fff145 100644
> --- a/drivers/gpu/drm/sun4i/Kconfig
> +++ b/drivers/gpu/drm/sun4i/Kconfig
> @@ -12,3 +12,11 @@ config DRM_SUN4I
> Choose this option if you have an Allwinner SoC with a
> Display Engine. If M is selected the module will be called
> sun4i-drm.
> +
> +config DRM_SUN4I_DE2
> + bool "Support Display Engine 2.0"
> + depends on DRM_SUN4I
> + default MACH_SUN8I
> + help
> + Choose this option if you have an Allwinner SoC with a
> + "Display Engine 2.0".
> diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
> index d625a82a6e5f..890e6e50dfee 100644
> --- a/drivers/gpu/drm/sun4i/Makefile
> +++ b/drivers/gpu/drm/sun4i/Makefile
> @@ -9,5 +9,6 @@ sun4i-tcon-y += sun4i_dotclock.o
>
> obj-$(CONFIG_DRM_SUN4I) += sun4i-drm.o sun4i-tcon.o
> obj-$(CONFIG_DRM_SUN4I) += sun4i_backend.o
> +obj-$(CONFIG_DRM_SUN4I) += sun8i_mixer.o
> obj-$(CONFIG_DRM_SUN4I) += sun6i_drc.o
> obj-$(CONFIG_DRM_SUN4I) += sun4i_tv.o
> diff --git a/drivers/gpu/drm/sun4i/sun4i_crtc.c b/drivers/gpu/drm/sun4i/sun4i_crtc.c
> index 4a192210574f..4d2228454726 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_crtc.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_crtc.c
> @@ -25,6 +25,7 @@
> #include <video/videomode.h>
>
> #include "sun4i_backend.h"
> +#include "sun8i_mixer.h"
> #include "sun4i_crtc.h"
> #include "sun4i_drv.h"
> #include "sun4i_tcon.h"
> @@ -55,7 +56,10 @@ static void sun4i_crtc_atomic_flush(struct drm_crtc *crtc,
>
> DRM_DEBUG_DRIVER("Committing plane changes\n");
>
> - sun4i_backend_commit(drv->backend);
> + if (drv->backend)
> + sun4i_backend_commit(drv->backend);
> + else if (drv->mixer)
> + sun8i_mixer_commit(drv->mixer);
>
> if (event) {
> crtc->state->event = NULL;
> diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.c b/drivers/gpu/drm/sun4i/sun4i_drv.c
> index 4ce665349f6b..58af38f5e833 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_drv.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
> @@ -20,12 +20,17 @@
> #include <drm/drm_fb_helper.h>
> #include <drm/drm_of.h>
>
> +#include <linux/of_device.h>
> +
> #include "sun4i_crtc.h"
> #include "sun4i_drv.h"
> #include "sun4i_framebuffer.h"
> #include "sun4i_layer.h"
> #include "sun4i_tcon.h"
>
> +#define DE_VER_DE 0
> +#define DE_VER_DE2 1
> +
> static int sun4i_drv_enable_vblank(struct drm_device *drm, unsigned int pipe)
> {
> struct sun4i_drv *drv = drm->dev_private;
> @@ -117,7 +122,9 @@ static int sun4i_drv_bind(struct device *dev)
> {
> struct drm_device *drm;
> struct sun4i_drv *drv;
> - int ret;
> + int ret, de_ver;
> +
> + de_ver = (int)of_device_get_match_data(dev);
>
> drm = drm_dev_alloc(&sun4i_drv_driver, dev);
> if (IS_ERR(drm))
> @@ -140,7 +147,10 @@ static int sun4i_drv_bind(struct device *dev)
> }
>
> /* Create our layers */
> - drv->layers = sun4i_layers_init(drm);
> + if (de_ver == DE_VER_DE2)
> + drv->layers = sun8i_layers_init(drm);
> + else
> + drv->layers = sun4i_layers_init(drm);
> if (IS_ERR(drv->layers)) {
> dev_err(drm->dev, "Couldn't create the planes\n");
> ret = PTR_ERR(drv->layers);
> @@ -323,10 +333,26 @@ static int sun4i_drv_remove(struct platform_device *pdev)
> }
>
> static const struct of_device_id sun4i_drv_of_table[] = {
> - { .compatible = "allwinner,sun5i-a13-display-engine" },
> - { .compatible = "allwinner,sun6i-a31-display-engine" },
> - { .compatible = "allwinner,sun6i-a31s-display-engine" },
> - { .compatible = "allwinner,sun8i-a33-display-engine" },
> + {
> + .compatible = "allwinner,sun5i-a13-display-engine",
> + .data = (void *)DE_VER_DE,
> + },
> + {
> + .compatible = "allwinner,sun6i-a31-display-engine",
> + .data = (void *)DE_VER_DE,
> + },
> + {
> + .compatible = "allwinner,sun6i-a31s-display-engine",
> + .data = (void *)DE_VER_DE,
> + },
> + {
> + .compatible = "allwinner,sun8i-a33-display-engine",
> + .data = (void *)DE_VER_DE,
> + },
> + {
> + .compatible = "allwinner,sun8i-v3s-display-engine",
> + .data = (void *)DE_VER_DE2,
> + },
> { }
> };
> MODULE_DEVICE_TABLE(of, sun4i_drv_of_table);
> diff --git a/drivers/gpu/drm/sun4i/sun4i_drv.h b/drivers/gpu/drm/sun4i/sun4i_drv.h
> index 597353eab728..cf1da95b85bd 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_drv.h
> +++ b/drivers/gpu/drm/sun4i/sun4i_drv.h
> @@ -18,6 +18,7 @@
>
> struct sun4i_drv {
> struct sun4i_backend *backend;
> + struct sun8i_mixer *mixer;
> struct sun4i_crtc *crtc;
> struct sun4i_tcon *tcon;
>
> diff --git a/drivers/gpu/drm/sun4i/sun4i_layer.c b/drivers/gpu/drm/sun4i/sun4i_layer.c
> index 5d53c977bca5..6dcdac38ab69 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_layer.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_layer.c
> @@ -16,52 +16,66 @@
> #include <drm/drmP.h>
>
> #include "sun4i_backend.h"
> +#include "sun8i_mixer.h"
> #include "sun4i_drv.h"
> #include "sun4i_layer.h"
>
> struct sun4i_plane_desc {
> enum drm_plane_type type;
> + /* Pipe is not used in sun8i-mixer */
> u8 pipe;
> const uint32_t *formats;
> uint32_t nformats;
> };
>
> -static int sun4i_backend_layer_atomic_check(struct drm_plane *plane,
> +static int sun4i_layer_atomic_check(struct drm_plane *plane,
> struct drm_plane_state *state)
> {
> return 0;
> }
>
> -static void sun4i_backend_layer_atomic_disable(struct drm_plane *plane,
> +static void sun4i_layer_atomic_disable(struct drm_plane *plane,
> struct drm_plane_state *old_state)
> {
> struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
> struct sun4i_drv *drv = layer->drv;
> struct sun4i_backend *backend = drv->backend;
> + struct sun8i_mixer *mixer = drv->mixer;
>
> - sun4i_backend_layer_enable(backend, layer->id, false);
> + if (backend)
> + sun4i_backend_layer_enable(backend, layer->id, false);
> + else if (mixer)
> + sun8i_mixer_layer_enable(mixer, layer->id, false);
> }
I'm not sure it makes sense to reuse that part. You can just create a
new plane driver entirely.
>
> -static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
> +static void sun4i_layer_atomic_update(struct drm_plane *plane,
> struct drm_plane_state *old_state)
> {
> struct sun4i_layer *layer = plane_to_sun4i_layer(plane);
> struct sun4i_drv *drv = layer->drv;
> struct sun4i_backend *backend = drv->backend;
> -
> - sun4i_backend_update_layer_coord(backend, layer->id, plane);
> - sun4i_backend_update_layer_formats(backend, layer->id, plane);
> - sun4i_backend_update_layer_buffer(backend, layer->id, plane);
> - sun4i_backend_layer_enable(backend, layer->id, true);
> + struct sun8i_mixer *mixer = drv->mixer;
> +
> + if (backend) {
> + sun4i_backend_update_layer_coord(backend, layer->id, plane);
> + sun4i_backend_update_layer_formats(backend, layer->id, plane);
> + sun4i_backend_update_layer_buffer(backend, layer->id, plane);
> + sun4i_backend_layer_enable(backend, layer->id, true);
> + } else if (mixer) {
> + sun8i_mixer_update_layer_coord(mixer, layer->id, plane);
> + sun8i_mixer_update_layer_formats(mixer, layer->id, plane);
> + sun8i_mixer_update_layer_buffer(mixer, layer->id, plane);
> + sun8i_mixer_layer_enable(mixer, layer->id, true);
> + }
> }
>
> -static struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = {
> - .atomic_check = sun4i_backend_layer_atomic_check,
> - .atomic_disable = sun4i_backend_layer_atomic_disable,
> - .atomic_update = sun4i_backend_layer_atomic_update,
> +static struct drm_plane_helper_funcs sun4i_layer_helper_funcs = {
> + .atomic_check = sun4i_layer_atomic_check,
> + .atomic_disable = sun4i_layer_atomic_disable,
> + .atomic_update = sun4i_layer_atomic_update,
> };
>
> -static const struct drm_plane_funcs sun4i_backend_layer_funcs = {
> +static const struct drm_plane_funcs sun4i_layer_funcs = {
> .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
> .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
> .destroy = drm_plane_cleanup,
> @@ -88,6 +102,12 @@ static const uint32_t sun4i_backend_layer_formats_overlay[] = {
> DRM_FORMAT_XRGB8888,
> };
>
> +static const uint32_t sun8i_mixer_layer_formats[] = {
> + DRM_FORMAT_ARGB8888,
> + DRM_FORMAT_RGB888,
> + DRM_FORMAT_XRGB8888,
> +};
> +
> static const struct sun4i_plane_desc sun4i_backend_planes[] = {
> {
> .type = DRM_PLANE_TYPE_PRIMARY,
> @@ -103,6 +123,19 @@ static const struct sun4i_plane_desc sun4i_backend_planes[] = {
> },
> };
>
> +static const struct sun4i_plane_desc sun8i_mixer_planes[] = {
> + {
> + .type = DRM_PLANE_TYPE_PRIMARY,
> + .formats = sun8i_mixer_layer_formats,
> + .nformats = ARRAY_SIZE(sun8i_mixer_layer_formats),
> + },
> + {
> + .type = DRM_PLANE_TYPE_OVERLAY,
> + .formats = sun8i_mixer_layer_formats,
> + .nformats = ARRAY_SIZE(sun8i_mixer_layer_formats),
> + },
> +};
> +
> static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
> const struct sun4i_plane_desc *plane)
> {
> @@ -115,7 +148,7 @@ static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
> return ERR_PTR(-ENOMEM);
>
> ret = drm_universal_plane_init(drm, &layer->plane, BIT(0),
> - &sun4i_backend_layer_funcs,
> + &sun4i_layer_funcs,
> plane->formats, plane->nformats,
> plane->type, NULL);
> if (ret) {
> @@ -124,7 +157,7 @@ static struct sun4i_layer *sun4i_layer_init_one(struct drm_device *drm,
> }
>
> drm_plane_helper_add(&layer->plane,
> - &sun4i_backend_layer_helper_funcs);
> + &sun4i_layer_helper_funcs);
> layer->drv = drv;
>
> if (plane->type == DRM_PLANE_TYPE_PRIMARY)
> @@ -187,3 +220,30 @@ struct sun4i_layer **sun4i_layers_init(struct drm_device *drm)
>
> return layers;
> }
> +
> +struct sun4i_layer **sun8i_layers_init(struct drm_device *drm)
And store this (and sun4i_layers_init) in an structure holding the
function pointers for those.
> +{
> + struct sun4i_layer **layers;
> + int i;
> +
> + layers = devm_kcalloc(drm->dev, ARRAY_SIZE(sun8i_mixer_planes),
> + sizeof(**layers), GFP_KERNEL);
> + if (!layers)
> + return ERR_PTR(-ENOMEM);
> +
> + for (i = 0; i < ARRAY_SIZE(sun8i_mixer_planes); i++) {
> + const struct sun4i_plane_desc *plane = &sun8i_mixer_planes[i];
> + struct sun4i_layer *layer = layers[i];
> +
> + layer = sun4i_layer_init_one(drm, plane);
> + if (IS_ERR(layer)) {
> + dev_err(drm->dev, "Couldn't initialize %s plane\n",
> + i ? "overlay" : "primary");
> + return ERR_CAST(layer);
> + };
> +
> + layer->id = i;
> + };
> +
> + return layers;
> +}
> diff --git a/drivers/gpu/drm/sun4i/sun4i_layer.h b/drivers/gpu/drm/sun4i/sun4i_layer.h
> index a2f65d7a3f4e..f7b9e5daea50 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_layer.h
> +++ b/drivers/gpu/drm/sun4i/sun4i_layer.h
> @@ -26,5 +26,6 @@ plane_to_sun4i_layer(struct drm_plane *plane)
> }
>
> struct sun4i_layer **sun4i_layers_init(struct drm_device *drm);
> +struct sun4i_layer **sun8i_layers_init(struct drm_device *drm);
>
> #endif /* _SUN4I_LAYER_H_ */
> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> new file mode 100644
> index 000000000000..9427b57240d3
> --- /dev/null
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c
> @@ -0,0 +1,417 @@
> +/*
> + * Copyright (C) 2017 Icenowy Zheng <icenowy@...c.xyz>
> + *
> + * Based on sun4i_backend.c, which is:
> + * Copyright (C) 2015 Free Electrons
> + * Copyright (C) 2015 NextThing Co
> + *
> + * 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/drmP.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_crtc.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_fb_cma_helper.h>
> +#include <drm/drm_gem_cma_helper.h>
> +#include <drm/drm_plane_helper.h>
> +
> +#include <linux/component.h>
> +#include <linux/reset.h>
> +#include <linux/of_device.h>
> +
> +#include "sun8i_mixer.h"
> +#include "sun4i_drv.h"
> +
> +#define SUN8I_DRAM_OFFSET 0x40000000
PHYS_OFFSET?
> +
> +#if defined CONFIG_DRM_SUN4I_DE2
That ifdef should be in the header
> +void sun8i_mixer_commit(struct sun8i_mixer *mixer)
> +{
> + DRM_DEBUG_DRIVER("Committing changes\n");
> +
> + regmap_write(mixer->regs, SUN8I_MIXER_GLOBAL_DBUFF,
> + SUN8I_MIXER_GLOBAL_DBUFF_ENABLE);
> +}
> +EXPORT_SYMBOL(sun8i_mixer_commit);
Commit could be one of these ops too.
> +void sun8i_mixer_layer_enable(struct sun8i_mixer *mixer,
> + int layer, bool enable)
> +{
> + u32 val;
> + /* Currently the first UI channel is used */
> + int chan = mixer->cfg->vi_num;
> +
> + DRM_DEBUG_DRIVER("Enabling layer %d in channel %d\n", layer, chan);
> +
> + if (enable)
> + val = SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN;
> + else
> + val = 0;
So you only support the UI channel?
Why do you expose several planes then?
> +
> + regmap_update_bits(mixer->regs,
> + SUN8I_MIXER_CHAN_UI_LAYER_ATTR(chan, layer),
> + SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN, val);
> +
> + /* Set the alpha configuration */
> + regmap_update_bits(mixer->regs,
> + SUN8I_MIXER_CHAN_UI_LAYER_ATTR(chan, layer),
> + SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MODE_MASK,
> + SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MODE_DEF);
> + regmap_update_bits(mixer->regs,
> + SUN8I_MIXER_CHAN_UI_LAYER_ATTR(chan, layer),
> + SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MASK,
> + SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_DEF);
This should be in a property
> +}
> +EXPORT_SYMBOL(sun8i_mixer_layer_enable);
> +
> +static int sun8i_mixer_drm_format_to_layer(struct drm_plane *plane,
> + u32 format, u32 *mode)
> +{
> + if ((plane->type == DRM_PLANE_TYPE_PRIMARY) &&
> + (format == DRM_FORMAT_ARGB8888))
> + format = DRM_FORMAT_XRGB8888;
Do you actually have that issue.
> + switch (format) {
> + case DRM_FORMAT_ARGB8888:
> + *mode = SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_ARGB8888;
> + break;
> +
> + case DRM_FORMAT_XRGB8888:
> + *mode = SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_XRGB8888;
> + break;
> +
> + case DRM_FORMAT_RGB888:
> + *mode = SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_RGB888;
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +int sun8i_mixer_update_layer_coord(struct sun8i_mixer *mixer,
> + int layer, struct drm_plane *plane)
> +{
> + struct drm_plane_state *state = plane->state;
> + struct drm_framebuffer *fb = state->fb;
> + /* Currently the first UI channel is used */
> + int chan = mixer->cfg->vi_num;
> + int i;
> +
> + DRM_DEBUG_DRIVER("Updating layer %d\n", layer);
> +
> + if (plane->type == DRM_PLANE_TYPE_PRIMARY) {
> + DRM_DEBUG_DRIVER("Primary layer, updating global size W: %u H: %u\n",
> + state->crtc_w, state->crtc_h);
> + regmap_write(mixer->regs, SUN8I_MIXER_GLOBAL_SIZE,
> + SUN8I_MIXER_SIZE(state->crtc_w,
> + state->crtc_h));
> + DRM_DEBUG_DRIVER("Updating blender size\n");
> + for (i = 0; i < SUN8I_MIXER_MAX_CHAN_COUNT; i++)
> + regmap_write(mixer->regs,
> + SUN8I_MIXER_BLEND_ATTR_INSIZE(i),
> + SUN8I_MIXER_SIZE(state->crtc_w,
> + state->crtc_h));
> + regmap_write(mixer->regs, SUN8I_MIXER_BLEND_OUTSIZE,
> + SUN8I_MIXER_SIZE(state->crtc_w,
> + state->crtc_h));
> + DRM_DEBUG_DRIVER("Updating channel size\n");
> + regmap_write(mixer->regs, SUN8I_MIXER_CHAN_UI_OVL_SIZE(chan),
> + SUN8I_MIXER_SIZE(state->crtc_w,
> + state->crtc_h));
> + }
> +
> + /* Set the line width */
> + DRM_DEBUG_DRIVER("Layer line width: %d bytes\n", fb->pitches[0]);
> + regmap_write(mixer->regs, SUN8I_MIXER_CHAN_UI_LAYER_PITCH(chan, layer),
> + fb->pitches[0]);
> +
> + /* Set height and width */
> + DRM_DEBUG_DRIVER("Layer size W: %u H: %u\n",
> + state->crtc_w, state->crtc_h);
> + regmap_write(mixer->regs, SUN8I_MIXER_CHAN_UI_LAYER_SIZE(chan, layer),
> + SUN8I_MIXER_SIZE(state->crtc_w, state->crtc_h));
> +
> + /* Set base coordinates */
> + DRM_DEBUG_DRIVER("Layer coordinates X: %d Y: %d\n",
> + state->crtc_x, state->crtc_y);
> + regmap_write(mixer->regs, SUN8I_MIXER_CHAN_UI_LAYER_COORD(chan, layer),
> + SUN8I_MIXER_COORD(state->crtc_x, state->crtc_y));
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(sun8i_mixer_update_layer_coord);
> +
> +int sun8i_mixer_update_layer_formats(struct sun8i_mixer *mixer,
> + int layer, struct drm_plane *plane)
> +{
> + struct drm_plane_state *state = plane->state;
> + struct drm_framebuffer *fb = state->fb;
> + bool interlaced = false;
> + u32 val;
> + /* Currently the first UI channel is used */
> + int chan = mixer->cfg->vi_num;
> + int ret;
> +
> + if (plane->state->crtc)
> + interlaced = plane->state->crtc->state->adjusted_mode.flags
> + & DRM_MODE_FLAG_INTERLACE;
> +
> + regmap_update_bits(mixer->regs, SUN8I_MIXER_BLEND_OUTCTL,
> + SUN8I_MIXER_BLEND_OUTCTL_INTERLACED,
> + interlaced ?
> + SUN8I_MIXER_BLEND_OUTCTL_INTERLACED : 0);
> +
> + DRM_DEBUG_DRIVER("Switching display mixer interlaced mode %s\n",
> + interlaced ? "on" : "off");
> +
> + ret = sun8i_mixer_drm_format_to_layer(plane, fb->format->format,
> + &val);
> + if (ret) {
> + DRM_DEBUG_DRIVER("Invalid format\n");
> + return ret;
> + }
> +
> + regmap_update_bits(mixer->regs,
> + SUN8I_MIXER_CHAN_UI_LAYER_ATTR(chan, layer),
> + SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_MASK, val);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(sun8i_mixer_update_layer_formats);
> +
> +int sun8i_mixer_update_layer_buffer(struct sun8i_mixer *mixer,
> + int layer, struct drm_plane *plane)
> +{
> + struct drm_plane_state *state = plane->state;
> + struct drm_framebuffer *fb = state->fb;
> + struct drm_gem_cma_object *gem;
> + dma_addr_t paddr;
> + uint32_t paddr_u32;
> + /* Currently the first UI channel is used */
> + int chan = mixer->cfg->vi_num;
> + int bpp;
> +
> + /* Get the physical address of the buffer in memory */
> + gem = drm_fb_cma_get_gem_obj(fb, 0);
> +
> + DRM_DEBUG_DRIVER("Using GEM @ %pad\n", &gem->paddr);
> +
> + /* Compute the start of the displayed memory */
> + bpp = fb->format->cpp[0];
> + paddr = gem->paddr + fb->offsets[0];
> + paddr += (state->src_x >> 16) * bpp;
> + paddr += (state->src_y >> 16) * fb->pitches[0];
> + paddr -= SUN8I_DRAM_OFFSET;
> +
> + DRM_DEBUG_DRIVER("Setting buffer address to %pad\n", &paddr);
> +
> + paddr_u32 = (uint32_t) paddr;
> +
> + regmap_write(mixer->regs,
> + SUN8I_MIXER_CHAN_UI_LAYER_TOP_LADDR(chan, layer),
> + paddr_u32);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL(sun8i_mixer_update_layer_buffer);
> +
> +static struct regmap_config sun8i_mixer_regmap_config = {
> + .reg_bits = 32,
> + .val_bits = 32,
> + .reg_stride = 4,
> + .max_register = 0xbffc, /* guessed */
> +};
> +
> +static int sun8i_mixer_bind(struct device *dev, struct device *master,
> + void *data)
> +{
> + struct platform_device *pdev = to_platform_device(dev);
> + struct drm_device *drm = data;
> + struct sun4i_drv *drv = drm->dev_private;
> + struct sun8i_mixer *mixer;
> + struct resource *res;
> + void __iomem *regs;
> + int i, ret;
> +
> + mixer = devm_kzalloc(dev, sizeof(*mixer), GFP_KERNEL);
> + if (!mixer)
> + return -ENOMEM;
> + dev_set_drvdata(dev, mixer);
> + drv->mixer = mixer;
> +
> + mixer->cfg = of_device_get_match_data(dev);
> + if (!mixer->cfg)
> + return -EINVAL;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + regs = devm_ioremap_resource(dev, res);
> + if (IS_ERR(regs))
> + return PTR_ERR(regs);
> +
> + mixer->regs = devm_regmap_init_mmio(dev, regs,
> + &sun8i_mixer_regmap_config);
> + if (IS_ERR(mixer->regs)) {
> + dev_err(dev, "Couldn't create the mixer regmap\n");
> + return PTR_ERR(mixer->regs);
> + }
> +
> + mixer->reset = devm_reset_control_get(dev, NULL);
> + if (IS_ERR(mixer->reset)) {
> + dev_err(dev, "Couldn't get our reset line\n");
> + return PTR_ERR(mixer->reset);
> + }
> +
> + ret = reset_control_deassert(mixer->reset);
> + if (ret) {
> + dev_err(dev, "Couldn't deassert our reset line\n");
> + return ret;
> + }
> +
> + mixer->bus_clk = devm_clk_get(dev, "bus");
> + if (IS_ERR(mixer->bus_clk)) {
> + dev_err(dev, "Couldn't get the mixer bus clock\n");
> + ret = PTR_ERR(mixer->bus_clk);
> + goto err_assert_reset;
> + }
> + clk_prepare_enable(mixer->bus_clk);
> +
> + mixer->mod_clk = devm_clk_get(dev, "mod");
> + if (IS_ERR(mixer->mod_clk)) {
> + dev_err(dev, "Couldn't get the mixer module clock\n");
> + ret = PTR_ERR(mixer->mod_clk);
> + goto err_disable_bus_clk;
> + }
> + clk_prepare_enable(mixer->mod_clk);
Supporting runtime_pm would be better.
> + /* Reset the registers */
> + for (i = 0x0; i < 0x20000; i += 4)
> + regmap_write(mixer->regs, i, 0);
Do you still need to reset it? Isn't the reset line enough?
> + /* Enable the mixer */
> + regmap_write(mixer->regs, SUN8I_MIXER_GLOBAL_CTL,
> + SUN8I_MIXER_GLOBAL_CTL_RT_EN);
> +
> + /* Initialize blender */
> + regmap_write(mixer->regs, SUN8I_MIXER_BLEND_FCOLOR_CTL,
> + SUN8I_MIXER_BLEND_FCOLOR_CTL_DEF);
> + regmap_write(mixer->regs, SUN8I_MIXER_BLEND_PREMULTIPLY,
> + SUN8I_MIXER_BLEND_PREMULTIPLY_DEF);
> + regmap_write(mixer->regs, SUN8I_MIXER_BLEND_BKCOLOR,
> + SUN8I_MIXER_BLEND_BKCOLOR_DEF);
> + regmap_write(mixer->regs, SUN8I_MIXER_BLEND_MODE(0),
> + SUN8I_MIXER_BLEND_MODE_DEF);
> + regmap_write(mixer->regs, SUN8I_MIXER_BLEND_MODE(1),
> + SUN8I_MIXER_BLEND_MODE_DEF);
> + regmap_write(mixer->regs, SUN8I_MIXER_BLEND_CK_CTL,
> + SUN8I_MIXER_BLEND_CK_CTL_DEF);
> +
> + for (i = 0; i < SUN8I_MIXER_MAX_CHAN_COUNT; i++)
> + regmap_write(mixer->regs,
> + SUN8I_MIXER_BLEND_ATTR_FCOLOR(i),
> + SUN8I_MIXER_BLEND_ATTR_FCOLOR_DEF);
> +
> + /* Select the first UI channel */
> + DRM_DEBUG_DRIVER("Selecting channel %d (first UI channel)\n",
> + mixer->cfg->vi_num);
> + regmap_write(mixer->regs, SUN8I_MIXER_BLEND_ROUTE,
> + mixer->cfg->vi_num);
> +
> + return 0;
> +
> + clk_disable_unprepare(mixer->mod_clk);
> +err_disable_bus_clk:
> + clk_disable_unprepare(mixer->bus_clk);
> +err_assert_reset:
> + reset_control_assert(mixer->reset);
> + return ret;
> +}
> +
> +static void sun8i_mixer_unbind(struct device *dev, struct device *master,
> + void *data)
> +{
> + struct sun8i_mixer *mixer = dev_get_drvdata(dev);
> +
> + clk_disable_unprepare(mixer->mod_clk);
> + clk_disable_unprepare(mixer->bus_clk);
> + reset_control_assert(mixer->reset);
> +}
> +
> +static const struct component_ops sun8i_mixer_ops = {
> + .bind = sun8i_mixer_bind,
> + .unbind = sun8i_mixer_unbind,
> +};
> +
> +static int sun8i_mixer_probe(struct platform_device *pdev)
> +{
> + return component_add(&pdev->dev, &sun8i_mixer_ops);
> +}
> +
> +static int sun8i_mixer_remove(struct platform_device *pdev)
> +{
> + component_del(&pdev->dev, &sun8i_mixer_ops);
> +
> + return 0;
> +}
> +
> +static const struct sun8i_mixer_cfg sun8i_v3s_mixer_cfg = {
> + .vi_num = 2,
> + .ui_num = 1,
> +};
> +
> +static const struct of_device_id sun8i_mixer_of_table[] = {
> + {
> + .compatible = "allwinner,sun8i-v3s-de2-mixer",
> + .data = &sun8i_v3s_mixer_cfg
> + },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, sun8i_mixer_of_table);
> +
> +static struct platform_driver sun8i_mixer_platform_driver = {
> + .probe = sun8i_mixer_probe,
> + .remove = sun8i_mixer_remove,
> + .driver = {
> + .name = "sun8i-mixer",
> + .of_match_table = sun8i_mixer_of_table,
> + },
> +};
> +module_platform_driver(sun8i_mixer_platform_driver);
> +
> +MODULE_AUTHOR("Icenowy Zheng <icenowy@...c.xyz>");
> +MODULE_DESCRIPTION("Allwinner DE2 Mixer driver");
> +MODULE_LICENSE("GPL");
> +#else /* DRM_SUN4I_DE2 */
> +void sun8i_mixer_commit(struct sun8i_mixer *mixer)
> +{
> +}
> +
> +void sun8i_mixer_layer_enable(struct sun8i_mixer *mixer,
> + int layer, bool enable)
> +{
> +}
> +
> +int sun8i_mixer_update_layer_coord(struct sun8i_mixer *mixer,
> + int layer, struct drm_plane *plane)
> +{
> + return -ENOENT;
> +}
> +
> +int sun8i_mixer_update_layer_formats(struct sun8i_mixer *mixer,
> + int layer, struct drm_plane *plane)
> +{
> + return -ENOENT;
> +}
> +
> +int sun8i_mixer_update_layer_buffer(struct sun8i_mixer *mixer,
> + int layer, struct drm_plane *plane)
> +{
> + return -ENOENT;
> +}
> +#endif /* CONFIG_DRM_SUN4I_DE2 */
> diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
> new file mode 100644
> index 000000000000..0bc134b3bc98
> --- /dev/null
> +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
> @@ -0,0 +1,133 @@
> +/*
> + * Copyright (C) 2017 Icenowy Zheng <icenowy@...c.xyz>
> + *
> + * 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.
> + */
> +
> +#ifndef _SUN8I_MIXER_H_
> +#define _SUN8I_MIXER_H_
> +
> +#include <linux/clk.h>
> +#include <linux/regmap.h>
> +#include <linux/reset.h>
> +
> +#include "sun4i_layer.h"
> +
> +#define SUN8I_MIXER_MAX_CHAN_COUNT 4
> +
> +#define SUN8I_MIXER_SIZE(w, h) (((h) - 1) << 16 | ((w) - 1))
> +#define SUN8I_MIXER_COORD(x, y) ((y) << 16 | (x))
> +
> +#define SUN8I_MIXER_GLOBAL_CTL 0x0
> +#define SUN8I_MIXER_GLOBAL_STATUS 0x4
> +#define SUN8I_MIXER_GLOBAL_DBUFF 0x8
> +#define SUN8I_MIXER_GLOBAL_SIZE 0xc
> +
> +#define SUN8I_MIXER_GLOBAL_CTL_RT_EN 0x1
> +
> +#define SUN8I_MIXER_GLOBAL_DBUFF_ENABLE 0x1
> +
> +#define SUN8I_MIXER_BLEND_FCOLOR_CTL 0x1000
> +#define SUN8I_MIXER_BLEND_ATTR_FCOLOR(x) (0x1004 + 0x10 * (x) + 0x0)
> +#define SUN8I_MIXER_BLEND_ATTR_INSIZE(x) (0x1004 + 0x10 * (x) + 0x4)
> +#define SUN8I_MIXER_BLEND_ATTR_OFFSET(x) (0x1004 + 0x10 * (x) + 0x8)
> +#define SUN8I_MIXER_BLEND_ROUTE 0x1080
> +#define SUN8I_MIXER_BLEND_PREMULTIPLY 0x1084
> +#define SUN8I_MIXER_BLEND_BKCOLOR 0x1088
> +#define SUN8I_MIXER_BLEND_OUTSIZE 0x108c
> +#define SUN8I_MIXER_BLEND_MODE(x) (0x1090 + 0x04 * (x))
> +#define SUN8I_MIXER_BLEND_CK_CTL 0x10b0
> +#define SUN8I_MIXER_BLEND_CK_CFG 0x10b4
> +#define SUN8I_MIXER_BLEND_CK_MAX(x) (0x10c0 + 0x04 * (x))
> +#define SUN8I_MIXER_BLEND_CK_MIN(x) (0x10e0 + 0x04 * (x))
> +#define SUN8I_MIXER_BLEND_OUTCTL 0x10fc
> +
> +/* The following numbers are some still unknown magic numbers */
> +#define SUN8I_MIXER_BLEND_ATTR_FCOLOR_DEF 0xff000000
> +#define SUN8I_MIXER_BLEND_FCOLOR_CTL_DEF 0x00000101
> +#define SUN8I_MIXER_BLEND_PREMULTIPLY_DEF 0x0
> +#define SUN8I_MIXER_BLEND_BKCOLOR_DEF 0xff000000
> +#define SUN8I_MIXER_BLEND_MODE_DEF 0x03010301
> +#define SUN8I_MIXER_BLEND_CK_CTL_DEF 0x0
> +
> +#define SUN8I_MIXER_BLEND_OUTCTL_INTERLACED BIT(1)
> +
> +/*
> + * VI channels are not used now, but the support of them may be introduced in
> + * the future.
> + */
> +
> +#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR(ch, layer) \
> + (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x0)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_SIZE(ch, layer) \
> + (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x4)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_COORD(ch, layer) \
> + (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x8)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_PITCH(ch, layer) \
> + (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0xc)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_TOP_LADDR(ch, layer) \
> + (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x10)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_BOT_LADDR(ch, layer) \
> + (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x14)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_FCOLOR(ch, layer) \
> + (0x2000 + 0x1000 * (ch) + 0x20 * (layer) + 0x18)
> +#define SUN8I_MIXER_CHAN_UI_TOP_HADDR(ch) (0x2000 + 0x1000 * (ch) + 0x80)
> +#define SUN8I_MIXER_CHAN_UI_BOT_HADDR(ch) (0x2000 + 0x1000 * (ch) + 0x84)
> +#define SUN8I_MIXER_CHAN_UI_OVL_SIZE(ch) (0x2000 + 0x1000 * (ch) + 0x88)
> +
> +#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_EN BIT(0)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MODE_MASK GENMASK(2, 1)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_MASK GENMASK(11, 8)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MASK GENMASK(31, 24)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_MODE_DEF (1 << 1)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_ARGB8888 (0 << 8)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_XRGB8888 (4 << 8)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_FBFMT_RGB888 (8 << 8)
> +#define SUN8I_MIXER_CHAN_UI_LAYER_ATTR_ALPHA_DEF (0xff << 24)
> +
> +/*
> + * These sun-engines are still unknown now, the EN registers are here only to
> + * be used to disable these sub-engines.
> + */
> +#define SUN8I_MIXER_VSU_EN 0x20000
> +#define SUN8I_MIXER_GSU1_EN 0x30000
> +#define SUN8I_MIXER_GSU2_EN 0x40000
> +#define SUN8I_MIXER_GSU3_EN 0x50000
> +#define SUN8I_MIXER_FCE_EN 0xa0000
> +#define SUN8I_MIXER_BWS_EN 0xa2000
> +#define SUN8I_MIXER_LTI_EN 0xa4000
> +#define SUN8I_MIXER_PEAK_EN 0xa6000
> +#define SUN8I_MIXER_ASE_EN 0xa8000
> +#define SUN8I_MIXER_FCC_EN 0xaa000
> +#define SUN8I_MIXER_DCSC_EN 0xb0000
> +
> +struct sun8i_mixer_cfg {
> + int vi_num;
> + int ui_num;
> +};
> +
> +struct sun8i_mixer {
> + struct regmap *regs;
> +
> + const struct sun8i_mixer_cfg *cfg;
> +
> + struct reset_control *reset;
> +
> + struct clk *bus_clk;
> + struct clk *mod_clk;
> +};
> +
> +void sun8i_mixer_commit(struct sun8i_mixer *mixer);
> +
> +void sun8i_mixer_layer_enable(struct sun8i_mixer *mixer,
> + int layer, bool enable);
> +int sun8i_mixer_update_layer_coord(struct sun8i_mixer *mixer,
> + int layer, struct drm_plane *plane);
> +int sun8i_mixer_update_layer_formats(struct sun8i_mixer *mixer,
> + int layer, struct drm_plane *plane);
> +int sun8i_mixer_update_layer_buffer(struct sun8i_mixer *mixer,
> + int layer, struct drm_plane *plane);
> +#endif /* _SUN8I_MIXER_H_ */
> --
> 2.11.1
>
Thanks,
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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