On Sat, 18 May 2013 19:12:18 +0200
Sebastian Hesselbarth <sebastian.hesselba...@gmail.com> wrote:
> This adds OF support for the Dove DRM driver recently posted as RFC by
> Russell King.
>
> Signed-off-by: Sebastian Hesselbarth <sebastian.hesselba...@gmail.com>
> ---
> Cc: Russell King <li...@arm.linux.org.uk>
> Cc: linux-arm-ker...@lists.infradead.org
> Cc: dri-devel@lists.freedesktop.org
> Cc: Jason Cooper <ja...@lakedaemon.net>
> Cc: Jean-Francois Moine <moin...@free.fr>
> ---
> drivers/gpu/drm/dove/Kconfig | 4 ++
> drivers/gpu/drm/dove/Makefile | 1 +
> drivers/gpu/drm/dove/dove_card.c | 110
> ++++++++++++++++++++++++++++++++++++++
> 3 files changed, 115 insertions(+)
> create mode 100644 drivers/gpu/drm/dove/dove_card.c
>
> diff --git a/drivers/gpu/drm/dove/Kconfig b/drivers/gpu/drm/dove/Kconfig
> index 718d3c5..a943ea5 100644
> --- a/drivers/gpu/drm/dove/Kconfig
> +++ b/drivers/gpu/drm/dove/Kconfig
> @@ -28,4 +28,8 @@ config DRM_DOVE_TDA1998X
> config DRM_DOVE_CURSOR
> bool "Enable Dove DRM hardware cursor support"
>
> +config DRM_DOVE_OF
> + bool "Enable Dove DRM OF video card"
> + depends on OF
> +
> endif
> diff --git a/drivers/gpu/drm/dove/Makefile b/drivers/gpu/drm/dove/Makefile
> index 65c701e..f0b6eed 100644
> --- a/drivers/gpu/drm/dove/Makefile
> +++ b/drivers/gpu/drm/dove/Makefile
> @@ -5,5 +5,6 @@ dove-y := dove_crtc.o dove_drv.o
> dove_fb.o dove_fbdev.o \
> dove-$(CONFIG_DEBUG_FS) += dove_debugfs.o
>
> dove-$(CONFIG_DRM_DOVE_TDA1998X) += dove_tda19988.o
> +dove-$(CONFIG_DRM_DOVE_OF) += dove_card.o
>
> obj-$(CONFIG_DRM_DOVE) := dove.o
> diff --git a/drivers/gpu/drm/dove/dove_card.c
> b/drivers/gpu/drm/dove/dove_card.c
> new file mode 100644
> index 0000000..e4bcb5b
> --- /dev/null
> +++ b/drivers/gpu/drm/dove/dove_card.c
> @@ -0,0 +1,110 @@
> +/*
> + * Copyright (C) 2013
> + * Sebastian Hesselbarth <sebastian.hesselba...@gmail.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +#include <linux/clk.h>
> +#include <linux/clkdev.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/of_irq.h>
> +#include <linux/of_platform.h>
> +#include <linux/platform_device.h>
> +
> +#define DOVE_LCD0_BASE 0x20000
> +#define DOVE_LCD1_BASE 0x10000
> +
> +static struct resource dove_drm_resources[5];
> +static struct platform_device dove_drm_platform_device = {
> + .name = "dove-drm",
> + .id = 0,
> + .dev = { .coherent_dma_mask = ~0, },
> + .resource = dove_drm_resources,
> +};
> +
> +static int dove_card_probe(struct platform_device *pdev)
> +{
> + struct device_node *np = pdev->dev.of_node;
> + struct device_node *lcdnp;
> + struct resource *res = dove_drm_resources;
> + int ret, n = 0, crtcs = 0;
> +
> + /* get video memory resource */
> + if (of_address_to_resource(np, 0, &res[n++])) {
> + dev_err(&pdev->dev, "invalid or missing video memory\n");
> + return -EINVAL;
> + }
> +
> + /* get reg and irq resource from each enabled lcdc */
> + for_each_compatible_node(lcdnp, NULL, "marvell,dove-lcd") {
> + struct clk_lookup *cl;
> + struct clk *clk;
> + int lcd;
> +
> + if (!of_device_is_available(lcdnp))
> + continue;
> +
> + ret = of_address_to_resource(lcdnp, 0, &res[n]);
> + if (ret)
> + return ret;
> + lcd = ((res[n].start & 0xfffff) == DOVE_LCD1_BASE);
> + n++;
> +
> + ret = of_irq_to_resource(lcdnp, 0, &res[n]);
> + if (ret < 0)
> + return ret;
> + n++;
> +
> + crtcs++;
> +
> + clk = clk_get(&pdev->dev, NULL);
> + if (IS_ERR(clk)) {
> + ret = PTR_ERR(clk);
> + if (ret == -ENOENT)
> + return -EPROBE_DEFER;
> + return ret;
> + }
> +
> + /* add clock alias for dovefb.0 */
> + cl = clkdev_alloc(clk, "extclk", "dovefb.0");
> + if (cl)
> + clkdev_add(cl);
> + clk_put(clk);
> + }
> +
> + if (!crtcs)
> + return -ENODEV;
> +
> + dove_drm_platform_device.num_resources = n;
> + ret = platform_device_register(&dove_drm_platform_device);
> + if (ret) {
> + dev_err(&pdev->dev, "unable to register drm device\n");
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +static const struct of_device_id dove_card_of_ids[] = {
> + { .compatible = "marvell,dove-video-card", },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, dove_card_of_ids);
> +
> +static struct platform_driver dove_card_driver = {
> + .probe = dove_card_probe,
> + .driver = {
> + .owner = THIS_MODULE,
> + .name = "dove-drm-card",
> + .of_match_table = of_match_ptr(dove_card_of_ids),
> + },
> +};
> +module_platform_driver(dove_card_driver);
> +
> +MODULE_AUTHOR("Sebastian Hesselbarth <sebastian.hesselba...@gmail.com>");
> +MODULE_DESCRIPTION("Dove DRM Graphics Card");
> +MODULE_LICENSE("GPL");
It seems we are moving backwards:
- what about the display controller?
- how do you clone the lcd 0 output to the port B?
- what occurs when the si5351 and the tda998x are modules?
My driver had the same layout as Russell's when I proposed it to you
and when you insisted to handle the 2 LCDs and the 2 ports as one card.
I spent 2 months to have a nice design and you put it to garbage!
I am not happy...
--
Ken ar c'hentañ | ** Breizh ha Linux atav! **
Jef | http://moinejf.free.fr/
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