| Message ID | 20230320100903.23588-3-nirmoy.das@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2:,1/3] drm/i915: Add a function to mmap framebuffer obj | expand |
On 20.03.2023 11:09, Nirmoy Das wrote: > If stolen memory allocation fails for fbdev, the driver will > fallback to system memory. Calculation of smem_start is wrong > for such framebuffer objs if the platform comes with no gmadr or > no aperture. Solve this by adding fb_mmap callback which will > use GTT if aperture is available otherwise will use cpu to access > the framebuffer. > > v2: Use to_intel_fbdev() function(Jani) > > Cc: Matthew Auld <matthew.auld@intel.com> > Cc: Andi Shyti <andi.shyti@linux.intel.com> > Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> > Cc: Jani Nikula <jani.nikula@intel.com> > Cc: Imre Deak <imre.deak@intel.com> > Signed-off-by: Nirmoy Das <nirmoy.das@intel.com> > Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com> Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com> Regards Andrzej > --- > drivers/gpu/drm/i915/display/intel_fbdev.c | 12 ++++++++++++ > 1 file changed, 12 insertions(+) > > diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c > index 8c3b3c3fd0e0..5e52bef868a0 100644 > --- a/drivers/gpu/drm/i915/display/intel_fbdev.c > +++ b/drivers/gpu/drm/i915/display/intel_fbdev.c > @@ -40,8 +40,10 @@ > #include <drm/drm_crtc.h> > #include <drm/drm_fb_helper.h> > #include <drm/drm_fourcc.h> > +#include <drm/drm_gem_framebuffer_helper.h> > > #include "gem/i915_gem_lmem.h" > +#include "gem/i915_gem_mman.h" > > #include "i915_drv.h" > #include "intel_display_types.h" > @@ -119,6 +121,15 @@ static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, > return ret; > } > > +static int intel_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma) > +{ > + struct intel_fbdev *fbdev = to_intel_fbdev(info->par); > + struct drm_gem_object *bo = drm_gem_fb_get_obj(&fbdev->fb->base, 0); > + struct drm_i915_gem_object *obj = to_intel_bo(bo); > + > + return i915_gem_fb_mmap(obj, vma); > +} > + > static const struct fb_ops intelfb_ops = { > .owner = THIS_MODULE, > DRM_FB_HELPER_DEFAULT_OPS, > @@ -130,6 +141,7 @@ static const struct fb_ops intelfb_ops = { > .fb_imageblit = drm_fb_helper_cfb_imageblit, > .fb_pan_display = intel_fbdev_pan_display, > .fb_blank = intel_fbdev_blank, > + .fb_mmap = intel_fbdev_mmap, > }; > > static int intelfb_alloc(struct drm_fb_helper *helper,
diff --git a/drivers/gpu/drm/i915/display/intel_fbdev.c b/drivers/gpu/drm/i915/display/intel_fbdev.c index 8c3b3c3fd0e0..5e52bef868a0 100644 --- a/drivers/gpu/drm/i915/display/intel_fbdev.c +++ b/drivers/gpu/drm/i915/display/intel_fbdev.c @@ -40,8 +40,10 @@ #include <drm/drm_crtc.h> #include <drm/drm_fb_helper.h> #include <drm/drm_fourcc.h> +#include <drm/drm_gem_framebuffer_helper.h> #include "gem/i915_gem_lmem.h" +#include "gem/i915_gem_mman.h" #include "i915_drv.h" #include "intel_display_types.h" @@ -119,6 +121,15 @@ static int intel_fbdev_pan_display(struct fb_var_screeninfo *var, return ret; } +static int intel_fbdev_mmap(struct fb_info *info, struct vm_area_struct *vma) +{ + struct intel_fbdev *fbdev = to_intel_fbdev(info->par); + struct drm_gem_object *bo = drm_gem_fb_get_obj(&fbdev->fb->base, 0); + struct drm_i915_gem_object *obj = to_intel_bo(bo); + + return i915_gem_fb_mmap(obj, vma); +} + static const struct fb_ops intelfb_ops = { .owner = THIS_MODULE, DRM_FB_HELPER_DEFAULT_OPS, @@ -130,6 +141,7 @@ static const struct fb_ops intelfb_ops = { .fb_imageblit = drm_fb_helper_cfb_imageblit, .fb_pan_display = intel_fbdev_pan_display, .fb_blank = intel_fbdev_blank, + .fb_mmap = intel_fbdev_mmap, }; static int intelfb_alloc(struct drm_fb_helper *helper,