| Message ID | 20171001153317.2343-2-hdegoede@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Sun, Oct 01, 2017 at 05:33:14PM +0200, Hans de Goede wrote: > Some x86 clamshell design devices use portrait tablet LCD panels and a > display engine which cannot (transparently) rotate in hardware, so we > need to rotate things in software / let user space deal with this. > > The fbcon code has a set of DMI based quirks to automatically detect > such tablet LCD panels and rotate the fbcon to compensate. > > The plan was for userspace (e.g. a Wayland compositor) to simply read > /sys/class/graphics/fbcon/rotate and apply the rotation from there to > the LCD panel to compensate. > > However this will not work when an external monitor gets plugged in, > since with fbcon rotation is not per output, so the fbcon quirk code > disables the rotation when an external monitor is present. > > Using /sys/class/graphics/fbcon/rotate will not help in that case > since it will indicate no rotation is in use. So instead we are going > to need a drm connecter property for this. > > This commit is a preparation patch for adding the drm-connecter > property, by making the fbcon quirk code generally usable so that > the drm code can use it to check for rotation quirks. > > Note this commit re-uses the FB_CMDLINE Kconfig option for selecting > if the quirk code should be build, since that is already selected by > both the drm and fbcon code. > > Signed-off-by: Hans de Goede <hdegoede@redhat.com> Can we pls just outright move this out of fbdev? fbdev is dead, I don't want to add/maintain new stuff in there (except fbcon, but that should not deal with stuff like this). This probably means some serious patch series acrobatics, or just breaking the current fbcon-only hack and rebuilding it in drm (in the same series). -Daniel > --- > Changes in v2: > -Rebased on 4.14-rc1 > --- > drivers/video/fbdev/core/Makefile | 6 +++--- > .../core/{fbcon_dmi_quirks.c => fb_dmi_quirks.c} | 15 +++++++++------ > drivers/video/fbdev/core/fbcon.c | 22 ++++++++++++++-------- > drivers/video/fbdev/core/fbcon.h | 6 ------ > include/linux/fb.h | 6 ++++++ > 5 files changed, 32 insertions(+), 23 deletions(-) > rename drivers/video/fbdev/core/{fbcon_dmi_quirks.c => fb_dmi_quirks.c} (91%) > > diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile > index 73493bbd7a15..06caf037a822 100644 > --- a/drivers/video/fbdev/core/Makefile > +++ b/drivers/video/fbdev/core/Makefile > @@ -1,4 +1,7 @@ > obj-$(CONFIG_FB_CMDLINE) += fb_cmdline.o > +ifeq ($(CONFIG_DMI),y) > +obj-$(CONFIG_FB_CMDLINE) += fb_dmi_quirks.o > +endif > obj-$(CONFIG_FB_NOTIFY) += fb_notify.o > obj-$(CONFIG_FB) += fb.o > fb-y := fbmem.o fbmon.o fbcmap.o fbsysfs.o \ > @@ -14,9 +17,6 @@ ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE_ROTATION),y) > fb-y += fbcon_rotate.o fbcon_cw.o fbcon_ud.o \ > fbcon_ccw.o > endif > -ifeq ($(CONFIG_DMI),y) > -fb-y += fbcon_dmi_quirks.o > -endif > endif > fb-objs := $(fb-y) > > diff --git a/drivers/video/fbdev/core/fbcon_dmi_quirks.c b/drivers/video/fbdev/core/fb_dmi_quirks.c > similarity index 91% > rename from drivers/video/fbdev/core/fbcon_dmi_quirks.c > rename to drivers/video/fbdev/core/fb_dmi_quirks.c > index 6904e47d1e51..d5fdf3245f83 100644 > --- a/drivers/video/fbdev/core/fbcon_dmi_quirks.c > +++ b/drivers/video/fbdev/core/fb_dmi_quirks.c > @@ -1,5 +1,5 @@ > /* > - * fbcon_dmi_quirks.c -- DMI based quirk detection for fbcon > + * fb_dmi_quirks.c -- DMI based LCD panel rotation quirk detection > * > * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> > * > @@ -11,7 +11,6 @@ > #include <linux/dmi.h> > #include <linux/fb.h> > #include <linux/kernel.h> > -#include "fbcon.h" > > /* > * Some x86 clamshell design devices use portrait tablet screens and a display > @@ -112,7 +111,11 @@ static const struct dmi_system_id rotate_data[] = { > {} > }; > > -int fbcon_platform_get_rotate(struct fb_info *info) > +/* > + * Note this function returns the rotation necessary to put the display > + * the right way up, or -1 if there is no quirk. > + */ > +int fb_get_panel_rotate_quirk(int width, int height) > { > const struct dmi_system_id *match; > const struct fbcon_dmi_rotate_data *data; > @@ -124,8 +127,7 @@ int fbcon_platform_get_rotate(struct fb_info *info) > match = dmi_first_match(match + 1)) { > data = match->driver_data; > > - if (data->width != info->var.xres || > - data->height != info->var.yres) > + if (data->width != width || data->height != height) > continue; > > if (!data->bios_dates) > @@ -141,5 +143,6 @@ int fbcon_platform_get_rotate(struct fb_info *info) > } > } > > - return FB_ROTATE_UR; > + return -1; > } > +EXPORT_SYMBOL_GPL(fb_get_panel_rotate_quirk); > diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c > index 04612f938bab..2e17ea02c295 100644 > --- a/drivers/video/fbdev/core/fbcon.c > +++ b/drivers/video/fbdev/core/fbcon.c > @@ -963,10 +963,13 @@ static const char *fbcon_startup(void) > ops->cur_rotate = -1; > ops->cur_blink_jiffies = HZ / 5; > info->fbcon_par = ops; > - if (initial_rotation != -1) > - p->con_rotate = initial_rotation; > - else > - p->con_rotate = fbcon_platform_get_rotate(info); > + p->con_rotate = initial_rotation; > + if (p->con_rotate == -1) > + p->con_rotate = fb_get_panel_rotate_quirk(info->var.xres, > + info->var.yres); > + if (p->con_rotate == -1) > + p->con_rotate = FB_ROTATE_UR; > + > set_blitting_type(vc, info); > > if (info->fix.type != FB_TYPE_TEXT) { > @@ -1103,10 +1106,13 @@ static void fbcon_init(struct vc_data *vc, int init) > > ops = info->fbcon_par; > ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); > - if (initial_rotation != -1) > - p->con_rotate = initial_rotation; > - else > - p->con_rotate = fbcon_platform_get_rotate(info); > + p->con_rotate = initial_rotation; > + if (p->con_rotate == -1) > + p->con_rotate = fb_get_panel_rotate_quirk(info->var.xres, > + info->var.yres); > + if (p->con_rotate == -1) > + p->con_rotate = FB_ROTATE_UR; > + > set_blitting_type(vc, info); > > cols = vc->vc_cols; > diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h > index 18f3ac144237..3746828356ed 100644 > --- a/drivers/video/fbdev/core/fbcon.h > +++ b/drivers/video/fbdev/core/fbcon.h > @@ -261,10 +261,4 @@ extern void fbcon_set_rotate(struct fbcon_ops *ops); > #define fbcon_set_rotate(x) do {} while(0) > #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ > > -#ifdef CONFIG_DMI > -int fbcon_platform_get_rotate(struct fb_info *info); > -#else > -#define fbcon_platform_get_rotate(i) FB_ROTATE_UR > -#endif /* CONFIG_DMI */ > - > #endif /* _VIDEO_FBCON_H */ > diff --git a/include/linux/fb.h b/include/linux/fb.h > index f4386b0ccf40..7527965c5b53 100644 > --- a/include/linux/fb.h > +++ b/include/linux/fb.h > @@ -814,6 +814,12 @@ extern int fb_find_mode(struct fb_var_screeninfo *var, > const struct fb_videomode *default_mode, > unsigned int default_bpp); > > +#ifdef CONFIG_DMI > +int fb_get_panel_rotate_quirk(int width, int height); > +#else > +#define fb_get_panel_rotate_quirk(width, height) (-1) > +#endif /* CONFIG_DMI */ > + > /* Convenience logging macros */ > #define fb_err(fb_info, fmt, ...) \ > pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) > -- > 2.14.2 > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org > https://lists.freedesktop.org/mailman/listinfo/dri-devel
Hi, Sorry for being slow to reply, I've been a bit overwhelmed with other stuff lately. On 10/02/2017 10:01 AM, Daniel Vetter wrote: > On Sun, Oct 01, 2017 at 05:33:14PM +0200, Hans de Goede wrote: >> Some x86 clamshell design devices use portrait tablet LCD panels and a >> display engine which cannot (transparently) rotate in hardware, so we >> need to rotate things in software / let user space deal with this. >> >> The fbcon code has a set of DMI based quirks to automatically detect >> such tablet LCD panels and rotate the fbcon to compensate. >> >> The plan was for userspace (e.g. a Wayland compositor) to simply read >> /sys/class/graphics/fbcon/rotate and apply the rotation from there to >> the LCD panel to compensate. >> >> However this will not work when an external monitor gets plugged in, >> since with fbcon rotation is not per output, so the fbcon quirk code >> disables the rotation when an external monitor is present. >> >> Using /sys/class/graphics/fbcon/rotate will not help in that case >> since it will indicate no rotation is in use. So instead we are going >> to need a drm connecter property for this. >> >> This commit is a preparation patch for adding the drm-connecter >> property, by making the fbcon quirk code generally usable so that >> the drm code can use it to check for rotation quirks. >> >> Note this commit re-uses the FB_CMDLINE Kconfig option for selecting >> if the quirk code should be build, since that is already selected by >> both the drm and fbcon code. >> >> Signed-off-by: Hans de Goede <hdegoede@redhat.com> > > Can we pls just outright move this out of fbdev? fbdev is dead, I don't > want to add/maintain new stuff in there (except fbcon, but that should not > deal with stuff like this). Sure we can do that, but fbcon also needs access to the quirks, so then we need to have some part of the drm code which always gets builtin into the kernel and make the drm code export a function for this which the fbcon code uses. The reason why fbcon uses this is because there are cases where the BIOS does not setup the EFIFB with the correct rotation, typically because the hardware does not support 90 / 270 degrees rotation and the screen has been mounted rotated 90 / 270 degrees rotation. Regards, Hans > This probably means some serious patch series acrobatics, or just breaking > the current fbcon-only hack and rebuilding it in drm (in the same series). > > -Daniel > >> --- >> Changes in v2: >> -Rebased on 4.14-rc1 >> --- >> drivers/video/fbdev/core/Makefile | 6 +++--- >> .../core/{fbcon_dmi_quirks.c => fb_dmi_quirks.c} | 15 +++++++++------ >> drivers/video/fbdev/core/fbcon.c | 22 ++++++++++++++-------- >> drivers/video/fbdev/core/fbcon.h | 6 ------ >> include/linux/fb.h | 6 ++++++ >> 5 files changed, 32 insertions(+), 23 deletions(-) >> rename drivers/video/fbdev/core/{fbcon_dmi_quirks.c => fb_dmi_quirks.c} (91%) >> >> diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile >> index 73493bbd7a15..06caf037a822 100644 >> --- a/drivers/video/fbdev/core/Makefile >> +++ b/drivers/video/fbdev/core/Makefile >> @@ -1,4 +1,7 @@ >> obj-$(CONFIG_FB_CMDLINE) += fb_cmdline.o >> +ifeq ($(CONFIG_DMI),y) >> +obj-$(CONFIG_FB_CMDLINE) += fb_dmi_quirks.o >> +endif >> obj-$(CONFIG_FB_NOTIFY) += fb_notify.o >> obj-$(CONFIG_FB) += fb.o >> fb-y := fbmem.o fbmon.o fbcmap.o fbsysfs.o \ >> @@ -14,9 +17,6 @@ ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE_ROTATION),y) >> fb-y += fbcon_rotate.o fbcon_cw.o fbcon_ud.o \ >> fbcon_ccw.o >> endif >> -ifeq ($(CONFIG_DMI),y) >> -fb-y += fbcon_dmi_quirks.o >> -endif >> endif >> fb-objs := $(fb-y) >> >> diff --git a/drivers/video/fbdev/core/fbcon_dmi_quirks.c b/drivers/video/fbdev/core/fb_dmi_quirks.c >> similarity index 91% >> rename from drivers/video/fbdev/core/fbcon_dmi_quirks.c >> rename to drivers/video/fbdev/core/fb_dmi_quirks.c >> index 6904e47d1e51..d5fdf3245f83 100644 >> --- a/drivers/video/fbdev/core/fbcon_dmi_quirks.c >> +++ b/drivers/video/fbdev/core/fb_dmi_quirks.c >> @@ -1,5 +1,5 @@ >> /* >> - * fbcon_dmi_quirks.c -- DMI based quirk detection for fbcon >> + * fb_dmi_quirks.c -- DMI based LCD panel rotation quirk detection >> * >> * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> >> * >> @@ -11,7 +11,6 @@ >> #include <linux/dmi.h> >> #include <linux/fb.h> >> #include <linux/kernel.h> >> -#include "fbcon.h" >> >> /* >> * Some x86 clamshell design devices use portrait tablet screens and a display >> @@ -112,7 +111,11 @@ static const struct dmi_system_id rotate_data[] = { >> {} >> }; >> >> -int fbcon_platform_get_rotate(struct fb_info *info) >> +/* >> + * Note this function returns the rotation necessary to put the display >> + * the right way up, or -1 if there is no quirk. >> + */ >> +int fb_get_panel_rotate_quirk(int width, int height) >> { >> const struct dmi_system_id *match; >> const struct fbcon_dmi_rotate_data *data; >> @@ -124,8 +127,7 @@ int fbcon_platform_get_rotate(struct fb_info *info) >> match = dmi_first_match(match + 1)) { >> data = match->driver_data; >> >> - if (data->width != info->var.xres || >> - data->height != info->var.yres) >> + if (data->width != width || data->height != height) >> continue; >> >> if (!data->bios_dates) >> @@ -141,5 +143,6 @@ int fbcon_platform_get_rotate(struct fb_info *info) >> } >> } >> >> - return FB_ROTATE_UR; >> + return -1; >> } >> +EXPORT_SYMBOL_GPL(fb_get_panel_rotate_quirk); >> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c >> index 04612f938bab..2e17ea02c295 100644 >> --- a/drivers/video/fbdev/core/fbcon.c >> +++ b/drivers/video/fbdev/core/fbcon.c >> @@ -963,10 +963,13 @@ static const char *fbcon_startup(void) >> ops->cur_rotate = -1; >> ops->cur_blink_jiffies = HZ / 5; >> info->fbcon_par = ops; >> - if (initial_rotation != -1) >> - p->con_rotate = initial_rotation; >> - else >> - p->con_rotate = fbcon_platform_get_rotate(info); >> + p->con_rotate = initial_rotation; >> + if (p->con_rotate == -1) >> + p->con_rotate = fb_get_panel_rotate_quirk(info->var.xres, >> + info->var.yres); >> + if (p->con_rotate == -1) >> + p->con_rotate = FB_ROTATE_UR; >> + >> set_blitting_type(vc, info); >> >> if (info->fix.type != FB_TYPE_TEXT) { >> @@ -1103,10 +1106,13 @@ static void fbcon_init(struct vc_data *vc, int init) >> >> ops = info->fbcon_par; >> ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); >> - if (initial_rotation != -1) >> - p->con_rotate = initial_rotation; >> - else >> - p->con_rotate = fbcon_platform_get_rotate(info); >> + p->con_rotate = initial_rotation; >> + if (p->con_rotate == -1) >> + p->con_rotate = fb_get_panel_rotate_quirk(info->var.xres, >> + info->var.yres); >> + if (p->con_rotate == -1) >> + p->con_rotate = FB_ROTATE_UR; >> + >> set_blitting_type(vc, info); >> >> cols = vc->vc_cols; >> diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h >> index 18f3ac144237..3746828356ed 100644 >> --- a/drivers/video/fbdev/core/fbcon.h >> +++ b/drivers/video/fbdev/core/fbcon.h >> @@ -261,10 +261,4 @@ extern void fbcon_set_rotate(struct fbcon_ops *ops); >> #define fbcon_set_rotate(x) do {} while(0) >> #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ >> >> -#ifdef CONFIG_DMI >> -int fbcon_platform_get_rotate(struct fb_info *info); >> -#else >> -#define fbcon_platform_get_rotate(i) FB_ROTATE_UR >> -#endif /* CONFIG_DMI */ >> - >> #endif /* _VIDEO_FBCON_H */ >> diff --git a/include/linux/fb.h b/include/linux/fb.h >> index f4386b0ccf40..7527965c5b53 100644 >> --- a/include/linux/fb.h >> +++ b/include/linux/fb.h >> @@ -814,6 +814,12 @@ extern int fb_find_mode(struct fb_var_screeninfo *var, >> const struct fb_videomode *default_mode, >> unsigned int default_bpp); >> >> +#ifdef CONFIG_DMI >> +int fb_get_panel_rotate_quirk(int width, int height); >> +#else >> +#define fb_get_panel_rotate_quirk(width, height) (-1) >> +#endif /* CONFIG_DMI */ >> + >> /* Convenience logging macros */ >> #define fb_err(fb_info, fmt, ...) \ >> pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) >> -- >> 2.14.2 >> >> _______________________________________________ >> dri-devel mailing list >> dri-devel@lists.freedesktop.org >> https://lists.freedesktop.org/mailman/listinfo/dri-devel > -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Tue, Oct 17, 2017 at 06:17:21PM +0200, Hans de Goede wrote: > Hi, > > Sorry for being slow to reply, I've been a bit overwhelmed with > other stuff lately. > > On 10/02/2017 10:01 AM, Daniel Vetter wrote: > > On Sun, Oct 01, 2017 at 05:33:14PM +0200, Hans de Goede wrote: > > > Some x86 clamshell design devices use portrait tablet LCD panels and a > > > display engine which cannot (transparently) rotate in hardware, so we > > > need to rotate things in software / let user space deal with this. > > > > > > The fbcon code has a set of DMI based quirks to automatically detect > > > such tablet LCD panels and rotate the fbcon to compensate. > > > > > > The plan was for userspace (e.g. a Wayland compositor) to simply read > > > /sys/class/graphics/fbcon/rotate and apply the rotation from there to > > > the LCD panel to compensate. > > > > > > However this will not work when an external monitor gets plugged in, > > > since with fbcon rotation is not per output, so the fbcon quirk code > > > disables the rotation when an external monitor is present. > > > > > > Using /sys/class/graphics/fbcon/rotate will not help in that case > > > since it will indicate no rotation is in use. So instead we are going > > > to need a drm connecter property for this. > > > > > > This commit is a preparation patch for adding the drm-connecter > > > property, by making the fbcon quirk code generally usable so that > > > the drm code can use it to check for rotation quirks. > > > > > > Note this commit re-uses the FB_CMDLINE Kconfig option for selecting > > > if the quirk code should be build, since that is already selected by > > > both the drm and fbcon code. > > > > > > Signed-off-by: Hans de Goede <hdegoede@redhat.com> > > > > Can we pls just outright move this out of fbdev? fbdev is dead, I don't > > want to add/maintain new stuff in there (except fbcon, but that should not > > deal with stuff like this). > > Sure we can do that, but fbcon also needs access to the quirks, so then > we need to have some part of the drm code which always gets builtin into > the kernel and make the drm code export a function for this which the > fbcon code uses. > > The reason why fbcon uses this is because there are cases where the BIOS > does not setup the EFIFB with the correct rotation, typically because > the hardware does not support 90 / 270 degrees rotation and the > screen has been mounted rotated 90 / 270 degrees rotation. Oh dear, I hoped we could ignore that. So yeah we need to load the same quirk table for efifb and for i915. How much I wish we'd just have merged simpledrm by now :-) I still don't think that fbcon should have access to the quirks directly, but efifb and drm_fb_helper should set the same hint flags probably. Wrt the location, I don't even think we need to have this built-in. Put a new module for intel-quirks into drivers/gpu/platform and select that from both, and it should all work out I think. Or is there some other gotcha? Thanks, Daniel > > Regards, > > Hans > > > > This probably means some serious patch series acrobatics, or just breaking > > the current fbcon-only hack and rebuilding it in drm (in the same series). > > > > -Daniel > > > > > --- > > > Changes in v2: > > > -Rebased on 4.14-rc1 > > > --- > > > drivers/video/fbdev/core/Makefile | 6 +++--- > > > .../core/{fbcon_dmi_quirks.c => fb_dmi_quirks.c} | 15 +++++++++------ > > > drivers/video/fbdev/core/fbcon.c | 22 ++++++++++++++-------- > > > drivers/video/fbdev/core/fbcon.h | 6 ------ > > > include/linux/fb.h | 6 ++++++ > > > 5 files changed, 32 insertions(+), 23 deletions(-) > > > rename drivers/video/fbdev/core/{fbcon_dmi_quirks.c => fb_dmi_quirks.c} (91%) > > > > > > diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile > > > index 73493bbd7a15..06caf037a822 100644 > > > --- a/drivers/video/fbdev/core/Makefile > > > +++ b/drivers/video/fbdev/core/Makefile > > > @@ -1,4 +1,7 @@ > > > obj-$(CONFIG_FB_CMDLINE) += fb_cmdline.o > > > +ifeq ($(CONFIG_DMI),y) > > > +obj-$(CONFIG_FB_CMDLINE) += fb_dmi_quirks.o > > > +endif > > > obj-$(CONFIG_FB_NOTIFY) += fb_notify.o > > > obj-$(CONFIG_FB) += fb.o > > > fb-y := fbmem.o fbmon.o fbcmap.o fbsysfs.o \ > > > @@ -14,9 +17,6 @@ ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE_ROTATION),y) > > > fb-y += fbcon_rotate.o fbcon_cw.o fbcon_ud.o \ > > > fbcon_ccw.o > > > endif > > > -ifeq ($(CONFIG_DMI),y) > > > -fb-y += fbcon_dmi_quirks.o > > > -endif > > > endif > > > fb-objs := $(fb-y) > > > diff --git a/drivers/video/fbdev/core/fbcon_dmi_quirks.c b/drivers/video/fbdev/core/fb_dmi_quirks.c > > > similarity index 91% > > > rename from drivers/video/fbdev/core/fbcon_dmi_quirks.c > > > rename to drivers/video/fbdev/core/fb_dmi_quirks.c > > > index 6904e47d1e51..d5fdf3245f83 100644 > > > --- a/drivers/video/fbdev/core/fbcon_dmi_quirks.c > > > +++ b/drivers/video/fbdev/core/fb_dmi_quirks.c > > > @@ -1,5 +1,5 @@ > > > /* > > > - * fbcon_dmi_quirks.c -- DMI based quirk detection for fbcon > > > + * fb_dmi_quirks.c -- DMI based LCD panel rotation quirk detection > > > * > > > * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> > > > * > > > @@ -11,7 +11,6 @@ > > > #include <linux/dmi.h> > > > #include <linux/fb.h> > > > #include <linux/kernel.h> > > > -#include "fbcon.h" > > > /* > > > * Some x86 clamshell design devices use portrait tablet screens and a display > > > @@ -112,7 +111,11 @@ static const struct dmi_system_id rotate_data[] = { > > > {} > > > }; > > > -int fbcon_platform_get_rotate(struct fb_info *info) > > > +/* > > > + * Note this function returns the rotation necessary to put the display > > > + * the right way up, or -1 if there is no quirk. > > > + */ > > > +int fb_get_panel_rotate_quirk(int width, int height) > > > { > > > const struct dmi_system_id *match; > > > const struct fbcon_dmi_rotate_data *data; > > > @@ -124,8 +127,7 @@ int fbcon_platform_get_rotate(struct fb_info *info) > > > match = dmi_first_match(match + 1)) { > > > data = match->driver_data; > > > - if (data->width != info->var.xres || > > > - data->height != info->var.yres) > > > + if (data->width != width || data->height != height) > > > continue; > > > if (!data->bios_dates) > > > @@ -141,5 +143,6 @@ int fbcon_platform_get_rotate(struct fb_info *info) > > > } > > > } > > > - return FB_ROTATE_UR; > > > + return -1; > > > } > > > +EXPORT_SYMBOL_GPL(fb_get_panel_rotate_quirk); > > > diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c > > > index 04612f938bab..2e17ea02c295 100644 > > > --- a/drivers/video/fbdev/core/fbcon.c > > > +++ b/drivers/video/fbdev/core/fbcon.c > > > @@ -963,10 +963,13 @@ static const char *fbcon_startup(void) > > > ops->cur_rotate = -1; > > > ops->cur_blink_jiffies = HZ / 5; > > > info->fbcon_par = ops; > > > - if (initial_rotation != -1) > > > - p->con_rotate = initial_rotation; > > > - else > > > - p->con_rotate = fbcon_platform_get_rotate(info); > > > + p->con_rotate = initial_rotation; > > > + if (p->con_rotate == -1) > > > + p->con_rotate = fb_get_panel_rotate_quirk(info->var.xres, > > > + info->var.yres); > > > + if (p->con_rotate == -1) > > > + p->con_rotate = FB_ROTATE_UR; > > > + > > > set_blitting_type(vc, info); > > > if (info->fix.type != FB_TYPE_TEXT) { > > > @@ -1103,10 +1106,13 @@ static void fbcon_init(struct vc_data *vc, int init) > > > ops = info->fbcon_par; > > > ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); > > > - if (initial_rotation != -1) > > > - p->con_rotate = initial_rotation; > > > - else > > > - p->con_rotate = fbcon_platform_get_rotate(info); > > > + p->con_rotate = initial_rotation; > > > + if (p->con_rotate == -1) > > > + p->con_rotate = fb_get_panel_rotate_quirk(info->var.xres, > > > + info->var.yres); > > > + if (p->con_rotate == -1) > > > + p->con_rotate = FB_ROTATE_UR; > > > + > > > set_blitting_type(vc, info); > > > cols = vc->vc_cols; > > > diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h > > > index 18f3ac144237..3746828356ed 100644 > > > --- a/drivers/video/fbdev/core/fbcon.h > > > +++ b/drivers/video/fbdev/core/fbcon.h > > > @@ -261,10 +261,4 @@ extern void fbcon_set_rotate(struct fbcon_ops *ops); > > > #define fbcon_set_rotate(x) do {} while(0) > > > #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ > > > -#ifdef CONFIG_DMI > > > -int fbcon_platform_get_rotate(struct fb_info *info); > > > -#else > > > -#define fbcon_platform_get_rotate(i) FB_ROTATE_UR > > > -#endif /* CONFIG_DMI */ > > > - > > > #endif /* _VIDEO_FBCON_H */ > > > diff --git a/include/linux/fb.h b/include/linux/fb.h > > > index f4386b0ccf40..7527965c5b53 100644 > > > --- a/include/linux/fb.h > > > +++ b/include/linux/fb.h > > > @@ -814,6 +814,12 @@ extern int fb_find_mode(struct fb_var_screeninfo *var, > > > const struct fb_videomode *default_mode, > > > unsigned int default_bpp); > > > +#ifdef CONFIG_DMI > > > +int fb_get_panel_rotate_quirk(int width, int height); > > > +#else > > > +#define fb_get_panel_rotate_quirk(width, height) (-1) > > > +#endif /* CONFIG_DMI */ > > > + > > > /* Convenience logging macros */ > > > #define fb_err(fb_info, fmt, ...) \ > > > pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) > > > -- > > > 2.14.2 > > > > > > _______________________________________________ > > > dri-devel mailing list > > > dri-devel@lists.freedesktop.org > > > https://lists.freedesktop.org/mailman/listinfo/dri-devel > >
Hi, On 18-10-17 10:03, Daniel Vetter wrote: > On Tue, Oct 17, 2017 at 06:17:21PM +0200, Hans de Goede wrote: >> Hi, >> >> Sorry for being slow to reply, I've been a bit overwhelmed with >> other stuff lately. >> >> On 10/02/2017 10:01 AM, Daniel Vetter wrote: >>> On Sun, Oct 01, 2017 at 05:33:14PM +0200, Hans de Goede wrote: >>>> Some x86 clamshell design devices use portrait tablet LCD panels and a >>>> display engine which cannot (transparently) rotate in hardware, so we >>>> need to rotate things in software / let user space deal with this. >>>> >>>> The fbcon code has a set of DMI based quirks to automatically detect >>>> such tablet LCD panels and rotate the fbcon to compensate. >>>> >>>> The plan was for userspace (e.g. a Wayland compositor) to simply read >>>> /sys/class/graphics/fbcon/rotate and apply the rotation from there to >>>> the LCD panel to compensate. >>>> >>>> However this will not work when an external monitor gets plugged in, >>>> since with fbcon rotation is not per output, so the fbcon quirk code >>>> disables the rotation when an external monitor is present. >>>> >>>> Using /sys/class/graphics/fbcon/rotate will not help in that case >>>> since it will indicate no rotation is in use. So instead we are going >>>> to need a drm connecter property for this. >>>> >>>> This commit is a preparation patch for adding the drm-connecter >>>> property, by making the fbcon quirk code generally usable so that >>>> the drm code can use it to check for rotation quirks. >>>> >>>> Note this commit re-uses the FB_CMDLINE Kconfig option for selecting >>>> if the quirk code should be build, since that is already selected by >>>> both the drm and fbcon code. >>>> >>>> Signed-off-by: Hans de Goede <hdegoede@redhat.com> >>> >>> Can we pls just outright move this out of fbdev? fbdev is dead, I don't >>> want to add/maintain new stuff in there (except fbcon, but that should not >>> deal with stuff like this). >> >> Sure we can do that, but fbcon also needs access to the quirks, so then >> we need to have some part of the drm code which always gets builtin into >> the kernel and make the drm code export a function for this which the >> fbcon code uses. >> >> The reason why fbcon uses this is because there are cases where the BIOS >> does not setup the EFIFB with the correct rotation, typically because >> the hardware does not support 90 / 270 degrees rotation and the >> screen has been mounted rotated 90 / 270 degrees rotation. > > Oh dear, I hoped we could ignore that. > > So yeah we need to load the same quirk table for efifb and for i915. How > much I wish we'd just have merged simpledrm by now :-) > > I still don't think that fbcon should have access to the quirks directly, > but efifb and drm_fb_helper should set the same hint flags probably. > > Wrt the location, I don't even think we need to have this built-in. Put a > new module for intel-quirks into drivers/gpu/platform and select that from > both, and it should all work out I think. > > Or is there some other gotcha? Not that I can see, this all sounds reasonable to me. I will start reworking the patch-set to address this (and your other comments) and post a new version of the patch-set when I'm done. Regards, Hans >>> This probably means some serious patch series acrobatics, or just breaking >>> the current fbcon-only hack and rebuilding it in drm (in the same series). >>> >>> -Daniel >>> >>>> --- >>>> Changes in v2: >>>> -Rebased on 4.14-rc1 >>>> --- >>>> drivers/video/fbdev/core/Makefile | 6 +++--- >>>> .../core/{fbcon_dmi_quirks.c => fb_dmi_quirks.c} | 15 +++++++++------ >>>> drivers/video/fbdev/core/fbcon.c | 22 ++++++++++++++-------- >>>> drivers/video/fbdev/core/fbcon.h | 6 ------ >>>> include/linux/fb.h | 6 ++++++ >>>> 5 files changed, 32 insertions(+), 23 deletions(-) >>>> rename drivers/video/fbdev/core/{fbcon_dmi_quirks.c => fb_dmi_quirks.c} (91%) >>>> >>>> diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile >>>> index 73493bbd7a15..06caf037a822 100644 >>>> --- a/drivers/video/fbdev/core/Makefile >>>> +++ b/drivers/video/fbdev/core/Makefile >>>> @@ -1,4 +1,7 @@ >>>> obj-$(CONFIG_FB_CMDLINE) += fb_cmdline.o >>>> +ifeq ($(CONFIG_DMI),y) >>>> +obj-$(CONFIG_FB_CMDLINE) += fb_dmi_quirks.o >>>> +endif >>>> obj-$(CONFIG_FB_NOTIFY) += fb_notify.o >>>> obj-$(CONFIG_FB) += fb.o >>>> fb-y := fbmem.o fbmon.o fbcmap.o fbsysfs.o \ >>>> @@ -14,9 +17,6 @@ ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE_ROTATION),y) >>>> fb-y += fbcon_rotate.o fbcon_cw.o fbcon_ud.o \ >>>> fbcon_ccw.o >>>> endif >>>> -ifeq ($(CONFIG_DMI),y) >>>> -fb-y += fbcon_dmi_quirks.o >>>> -endif >>>> endif >>>> fb-objs := $(fb-y) >>>> diff --git a/drivers/video/fbdev/core/fbcon_dmi_quirks.c b/drivers/video/fbdev/core/fb_dmi_quirks.c >>>> similarity index 91% >>>> rename from drivers/video/fbdev/core/fbcon_dmi_quirks.c >>>> rename to drivers/video/fbdev/core/fb_dmi_quirks.c >>>> index 6904e47d1e51..d5fdf3245f83 100644 >>>> --- a/drivers/video/fbdev/core/fbcon_dmi_quirks.c >>>> +++ b/drivers/video/fbdev/core/fb_dmi_quirks.c >>>> @@ -1,5 +1,5 @@ >>>> /* >>>> - * fbcon_dmi_quirks.c -- DMI based quirk detection for fbcon >>>> + * fb_dmi_quirks.c -- DMI based LCD panel rotation quirk detection >>>> * >>>> * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> >>>> * >>>> @@ -11,7 +11,6 @@ >>>> #include <linux/dmi.h> >>>> #include <linux/fb.h> >>>> #include <linux/kernel.h> >>>> -#include "fbcon.h" >>>> /* >>>> * Some x86 clamshell design devices use portrait tablet screens and a display >>>> @@ -112,7 +111,11 @@ static const struct dmi_system_id rotate_data[] = { >>>> {} >>>> }; >>>> -int fbcon_platform_get_rotate(struct fb_info *info) >>>> +/* >>>> + * Note this function returns the rotation necessary to put the display >>>> + * the right way up, or -1 if there is no quirk. >>>> + */ >>>> +int fb_get_panel_rotate_quirk(int width, int height) >>>> { >>>> const struct dmi_system_id *match; >>>> const struct fbcon_dmi_rotate_data *data; >>>> @@ -124,8 +127,7 @@ int fbcon_platform_get_rotate(struct fb_info *info) >>>> match = dmi_first_match(match + 1)) { >>>> data = match->driver_data; >>>> - if (data->width != info->var.xres || >>>> - data->height != info->var.yres) >>>> + if (data->width != width || data->height != height) >>>> continue; >>>> if (!data->bios_dates) >>>> @@ -141,5 +143,6 @@ int fbcon_platform_get_rotate(struct fb_info *info) >>>> } >>>> } >>>> - return FB_ROTATE_UR; >>>> + return -1; >>>> } >>>> +EXPORT_SYMBOL_GPL(fb_get_panel_rotate_quirk); >>>> diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c >>>> index 04612f938bab..2e17ea02c295 100644 >>>> --- a/drivers/video/fbdev/core/fbcon.c >>>> +++ b/drivers/video/fbdev/core/fbcon.c >>>> @@ -963,10 +963,13 @@ static const char *fbcon_startup(void) >>>> ops->cur_rotate = -1; >>>> ops->cur_blink_jiffies = HZ / 5; >>>> info->fbcon_par = ops; >>>> - if (initial_rotation != -1) >>>> - p->con_rotate = initial_rotation; >>>> - else >>>> - p->con_rotate = fbcon_platform_get_rotate(info); >>>> + p->con_rotate = initial_rotation; >>>> + if (p->con_rotate == -1) >>>> + p->con_rotate = fb_get_panel_rotate_quirk(info->var.xres, >>>> + info->var.yres); >>>> + if (p->con_rotate == -1) >>>> + p->con_rotate = FB_ROTATE_UR; >>>> + >>>> set_blitting_type(vc, info); >>>> if (info->fix.type != FB_TYPE_TEXT) { >>>> @@ -1103,10 +1106,13 @@ static void fbcon_init(struct vc_data *vc, int init) >>>> ops = info->fbcon_par; >>>> ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); >>>> - if (initial_rotation != -1) >>>> - p->con_rotate = initial_rotation; >>>> - else >>>> - p->con_rotate = fbcon_platform_get_rotate(info); >>>> + p->con_rotate = initial_rotation; >>>> + if (p->con_rotate == -1) >>>> + p->con_rotate = fb_get_panel_rotate_quirk(info->var.xres, >>>> + info->var.yres); >>>> + if (p->con_rotate == -1) >>>> + p->con_rotate = FB_ROTATE_UR; >>>> + >>>> set_blitting_type(vc, info); >>>> cols = vc->vc_cols; >>>> diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h >>>> index 18f3ac144237..3746828356ed 100644 >>>> --- a/drivers/video/fbdev/core/fbcon.h >>>> +++ b/drivers/video/fbdev/core/fbcon.h >>>> @@ -261,10 +261,4 @@ extern void fbcon_set_rotate(struct fbcon_ops *ops); >>>> #define fbcon_set_rotate(x) do {} while(0) >>>> #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ >>>> -#ifdef CONFIG_DMI >>>> -int fbcon_platform_get_rotate(struct fb_info *info); >>>> -#else >>>> -#define fbcon_platform_get_rotate(i) FB_ROTATE_UR >>>> -#endif /* CONFIG_DMI */ >>>> - >>>> #endif /* _VIDEO_FBCON_H */ >>>> diff --git a/include/linux/fb.h b/include/linux/fb.h >>>> index f4386b0ccf40..7527965c5b53 100644 >>>> --- a/include/linux/fb.h >>>> +++ b/include/linux/fb.h >>>> @@ -814,6 +814,12 @@ extern int fb_find_mode(struct fb_var_screeninfo *var, >>>> const struct fb_videomode *default_mode, >>>> unsigned int default_bpp); >>>> +#ifdef CONFIG_DMI >>>> +int fb_get_panel_rotate_quirk(int width, int height); >>>> +#else >>>> +#define fb_get_panel_rotate_quirk(width, height) (-1) >>>> +#endif /* CONFIG_DMI */ >>>> + >>>> /* Convenience logging macros */ >>>> #define fb_err(fb_info, fmt, ...) \ >>>> pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__) >>>> -- >>>> 2.14.2 >>>> >>>> _______________________________________________ >>>> dri-devel mailing list >>>> dri-devel@lists.freedesktop.org >>>> https://lists.freedesktop.org/mailman/listinfo/dri-devel >>> > -- To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/video/fbdev/core/Makefile b/drivers/video/fbdev/core/Makefile index 73493bbd7a15..06caf037a822 100644 --- a/drivers/video/fbdev/core/Makefile +++ b/drivers/video/fbdev/core/Makefile @@ -1,4 +1,7 @@ obj-$(CONFIG_FB_CMDLINE) += fb_cmdline.o +ifeq ($(CONFIG_DMI),y) +obj-$(CONFIG_FB_CMDLINE) += fb_dmi_quirks.o +endif obj-$(CONFIG_FB_NOTIFY) += fb_notify.o obj-$(CONFIG_FB) += fb.o fb-y := fbmem.o fbmon.o fbcmap.o fbsysfs.o \ @@ -14,9 +17,6 @@ ifeq ($(CONFIG_FRAMEBUFFER_CONSOLE_ROTATION),y) fb-y += fbcon_rotate.o fbcon_cw.o fbcon_ud.o \ fbcon_ccw.o endif -ifeq ($(CONFIG_DMI),y) -fb-y += fbcon_dmi_quirks.o -endif endif fb-objs := $(fb-y) diff --git a/drivers/video/fbdev/core/fbcon_dmi_quirks.c b/drivers/video/fbdev/core/fb_dmi_quirks.c similarity index 91% rename from drivers/video/fbdev/core/fbcon_dmi_quirks.c rename to drivers/video/fbdev/core/fb_dmi_quirks.c index 6904e47d1e51..d5fdf3245f83 100644 --- a/drivers/video/fbdev/core/fbcon_dmi_quirks.c +++ b/drivers/video/fbdev/core/fb_dmi_quirks.c @@ -1,5 +1,5 @@ /* - * fbcon_dmi_quirks.c -- DMI based quirk detection for fbcon + * fb_dmi_quirks.c -- DMI based LCD panel rotation quirk detection * * Copyright (C) 2017 Hans de Goede <hdegoede@redhat.com> * @@ -11,7 +11,6 @@ #include <linux/dmi.h> #include <linux/fb.h> #include <linux/kernel.h> -#include "fbcon.h" /* * Some x86 clamshell design devices use portrait tablet screens and a display @@ -112,7 +111,11 @@ static const struct dmi_system_id rotate_data[] = { {} }; -int fbcon_platform_get_rotate(struct fb_info *info) +/* + * Note this function returns the rotation necessary to put the display + * the right way up, or -1 if there is no quirk. + */ +int fb_get_panel_rotate_quirk(int width, int height) { const struct dmi_system_id *match; const struct fbcon_dmi_rotate_data *data; @@ -124,8 +127,7 @@ int fbcon_platform_get_rotate(struct fb_info *info) match = dmi_first_match(match + 1)) { data = match->driver_data; - if (data->width != info->var.xres || - data->height != info->var.yres) + if (data->width != width || data->height != height) continue; if (!data->bios_dates) @@ -141,5 +143,6 @@ int fbcon_platform_get_rotate(struct fb_info *info) } } - return FB_ROTATE_UR; + return -1; } +EXPORT_SYMBOL_GPL(fb_get_panel_rotate_quirk); diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fbcon.c index 04612f938bab..2e17ea02c295 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -963,10 +963,13 @@ static const char *fbcon_startup(void) ops->cur_rotate = -1; ops->cur_blink_jiffies = HZ / 5; info->fbcon_par = ops; - if (initial_rotation != -1) - p->con_rotate = initial_rotation; - else - p->con_rotate = fbcon_platform_get_rotate(info); + p->con_rotate = initial_rotation; + if (p->con_rotate == -1) + p->con_rotate = fb_get_panel_rotate_quirk(info->var.xres, + info->var.yres); + if (p->con_rotate == -1) + p->con_rotate = FB_ROTATE_UR; + set_blitting_type(vc, info); if (info->fix.type != FB_TYPE_TEXT) { @@ -1103,10 +1106,13 @@ static void fbcon_init(struct vc_data *vc, int init) ops = info->fbcon_par; ops->cur_blink_jiffies = msecs_to_jiffies(vc->vc_cur_blink_ms); - if (initial_rotation != -1) - p->con_rotate = initial_rotation; - else - p->con_rotate = fbcon_platform_get_rotate(info); + p->con_rotate = initial_rotation; + if (p->con_rotate == -1) + p->con_rotate = fb_get_panel_rotate_quirk(info->var.xres, + info->var.yres); + if (p->con_rotate == -1) + p->con_rotate = FB_ROTATE_UR; + set_blitting_type(vc, info); cols = vc->vc_cols; diff --git a/drivers/video/fbdev/core/fbcon.h b/drivers/video/fbdev/core/fbcon.h index 18f3ac144237..3746828356ed 100644 --- a/drivers/video/fbdev/core/fbcon.h +++ b/drivers/video/fbdev/core/fbcon.h @@ -261,10 +261,4 @@ extern void fbcon_set_rotate(struct fbcon_ops *ops); #define fbcon_set_rotate(x) do {} while(0) #endif /* CONFIG_FRAMEBUFFER_CONSOLE_ROTATION */ -#ifdef CONFIG_DMI -int fbcon_platform_get_rotate(struct fb_info *info); -#else -#define fbcon_platform_get_rotate(i) FB_ROTATE_UR -#endif /* CONFIG_DMI */ - #endif /* _VIDEO_FBCON_H */ diff --git a/include/linux/fb.h b/include/linux/fb.h index f4386b0ccf40..7527965c5b53 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -814,6 +814,12 @@ extern int fb_find_mode(struct fb_var_screeninfo *var, const struct fb_videomode *default_mode, unsigned int default_bpp); +#ifdef CONFIG_DMI +int fb_get_panel_rotate_quirk(int width, int height); +#else +#define fb_get_panel_rotate_quirk(width, height) (-1) +#endif /* CONFIG_DMI */ + /* Convenience logging macros */ #define fb_err(fb_info, fmt, ...) \ pr_err("fb%d: " fmt, (fb_info)->node, ##__VA_ARGS__)
Some x86 clamshell design devices use portrait tablet LCD panels and a display engine which cannot (transparently) rotate in hardware, so we need to rotate things in software / let user space deal with this. The fbcon code has a set of DMI based quirks to automatically detect such tablet LCD panels and rotate the fbcon to compensate. The plan was for userspace (e.g. a Wayland compositor) to simply read /sys/class/graphics/fbcon/rotate and apply the rotation from there to the LCD panel to compensate. However this will not work when an external monitor gets plugged in, since with fbcon rotation is not per output, so the fbcon quirk code disables the rotation when an external monitor is present. Using /sys/class/graphics/fbcon/rotate will not help in that case since it will indicate no rotation is in use. So instead we are going to need a drm connecter property for this. This commit is a preparation patch for adding the drm-connecter property, by making the fbcon quirk code generally usable so that the drm code can use it to check for rotation quirks. Note this commit re-uses the FB_CMDLINE Kconfig option for selecting if the quirk code should be build, since that is already selected by both the drm and fbcon code. Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- Changes in v2: -Rebased on 4.14-rc1 --- drivers/video/fbdev/core/Makefile | 6 +++--- .../core/{fbcon_dmi_quirks.c => fb_dmi_quirks.c} | 15 +++++++++------ drivers/video/fbdev/core/fbcon.c | 22 ++++++++++++++-------- drivers/video/fbdev/core/fbcon.h | 6 ------ include/linux/fb.h | 6 ++++++ 5 files changed, 32 insertions(+), 23 deletions(-) rename drivers/video/fbdev/core/{fbcon_dmi_quirks.c => fb_dmi_quirks.c} (91%)