drm/armada: use common helper for plane base address
Use a common helper to calculate the plane base address(es) for the
framebuffer.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
diff --git a/drivers/gpu/drm/armada/armada_crtc.c b/drivers/gpu/drm/armada/armada_crtc.c
index 6d3b0ed..ceec930 100644
--- a/drivers/gpu/drm/armada/armada_crtc.c
+++ b/drivers/gpu/drm/armada/armada_crtc.c
@@ -165,19 +165,37 @@
}
}
+void armada_drm_plane_calc_addrs(u32 *addrs, struct drm_framebuffer *fb,
+ int x, int y)
+{
+ u32 addr = drm_fb_obj(fb)->dev_addr;
+ u32 pixel_format = fb->pixel_format;
+ int num_planes = drm_format_num_planes(pixel_format);
+ int i;
+
+ if (num_planes > 3)
+ num_planes = 3;
+
+ for (i = 0; i < num_planes; i++)
+ addrs[i] = addr + fb->offsets[i] + y * fb->pitches[i] +
+ x * drm_format_plane_cpp(pixel_format, i);
+ for (; i < 3; i++)
+ addrs[i] = 0;
+}
+
static unsigned armada_drm_crtc_calc_fb(struct drm_framebuffer *fb,
int x, int y, struct armada_regs *regs, bool interlaced)
{
- struct armada_gem_object *obj = drm_fb_obj(fb);
unsigned pitch = fb->pitches[0];
- unsigned offset = y * pitch + x * fb->bits_per_pixel / 8;
- uint32_t addr_odd, addr_even;
+ u32 addrs[3], addr_odd, addr_even;
unsigned i = 0;
DRM_DEBUG_DRIVER("pitch %u x %d y %d bpp %d\n",
pitch, x, y, fb->bits_per_pixel);
- addr_odd = addr_even = obj->dev_addr + offset;
+ armada_drm_plane_calc_addrs(addrs, fb, x, y);
+
+ addr_odd = addr_even = addrs[0];
if (interlaced) {
addr_even += pitch;