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Code Issues Releases Wiki Activity

drm/i915/display: Implement fb_mmap callback function

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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>
Link: https://patchwork.freedesktop.org/patch/msgid/20230404143100.10452-5-nirmoy.das@intel.com
This commit is contained in:
Nirmoy Das 2023-04-04 16:31:00 +02:00
parent 63b685efaa
commit e24e6d6953
1 changed files with 12 additions and 0 deletions
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12
drivers/gpu/drm/i915/display/intel_fbdev.c
View file

@ -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,