From 2b78a963c800252a0016785813cc5140c006145c Mon Sep 17 00:00:00 2001 From: Florian Tobias Schandinat Date: Sat, 17 Apr 2010 19:44:57 +0000 Subject: [PATCH] viafb: make procfs entries optional viafb: make procfs entries optional This patch adds a config option to enable procfs entries for direct hardware access. This was the old behaviour but the option defaults to no as this is really ugly and should not be needed if the driver works correct (and if it doesn't, it needs to be fixed). That stuff is really something that should - not be needed at all (the driver should be capable of doing it) - not be there (debugfs would be better for such things) So add this option just for backwards compatiblity. Signed-off-by: Florian Tobias Schandinat --- drivers/video/Kconfig | 14 ++++++++++++++ drivers/video/via/viafbdev.c | 8 ++++++++ 2 files changed, 22 insertions(+) diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 22c1662de964..fd55c279915c 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -1522,6 +1522,20 @@ config FB_VIA To compile this driver as a module, choose M here: the module will be called viafb. +if FB_VIA + +config FB_VIA_DIRECT_PROCFS + bool "direct hardware access via procfs (DEPRECATED)(DANGEROUS)" + depends on FB_VIA + default n + help + Allow direct hardware access to some output registers via procfs. + This is dangerous but may provide the only chance to get the + correct output device configuration. + Its use is strongly discouraged. + +endif + config FB_NEOMAGIC tristate "NeoMagic display support" depends on FB && PCI diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c index 51e9106138ce..3d033186a822 100644 --- a/drivers/video/via/viafbdev.c +++ b/drivers/video/via/viafbdev.c @@ -1326,6 +1326,8 @@ static void parse_dvi_port(void) output_interface); } +#ifdef CONFIG_FB_VIA_DIRECT_PROCFS + /* * The proc filesystem read/write function, a simple proc implement to * get/set the value of DPA DVP0, DVP0DataDriving, DVP0ClockDriving, DVP1, @@ -1715,6 +1717,8 @@ static void viafb_remove_proc(struct proc_dir_entry *viafb_entry) remove_proc_entry("viafb", NULL); } +#endif /* CONFIG_FB_VIA_DIRECT_PROCFS */ + static int parse_mode(const char *str, u32 *xres, u32 *yres) { char *ptr; @@ -1943,7 +1947,9 @@ int __devinit via_fb_pci_probe(struct viafb_dev *vdev) viafbinfo->node, viafbinfo->fix.id, default_var.xres, default_var.yres, default_var.bits_per_pixel); +#ifdef CONFIG_FB_VIA_DIRECT_PROCFS viafb_init_proc(&viaparinfo->shared->proc_entry); +#endif viafb_init_dac(IGA2); return 0; @@ -1970,7 +1976,9 @@ void __devexit via_fb_pci_remove(struct pci_dev *pdev) unregister_framebuffer(viafbinfo); if (viafb_dual_fb) unregister_framebuffer(viafbinfo1); +#ifdef CONFIG_FB_VIA_DIRECT_PROCFS viafb_remove_proc(viaparinfo->shared->proc_entry); +#endif framebuffer_release(viafbinfo); if (viafb_dual_fb) framebuffer_release(viafbinfo1); -- 2.20.1