[PATCH 24/51] drm/i915: Handle framebuffer offsets[]

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Take fb->offset[0] into account when calculating the linear and tile x/y
offsets.

For non-tiled surfaces fb->offset[0] is simply added to the linear
byte offset.

For tiled surfaces treat fb->offsets[0] as a byte offset into the
linearized view of the surface. So we end up converting fb->offsets[0]
into additional x and y offsets.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f3fea88..a4eb64f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1952,6 +1952,7 @@ static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 	unsigned long linear_offset;
 	u32 dspcntr;
 	u32 reg;
+	unsigned int cpp = drm_format_plane_cpp(fb->pixel_format, 0);
 
 	switch (plane) {
 	case 0:
@@ -2010,13 +2011,12 @@ static int i9xx_update_plane(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 
 	I915_WRITE(reg, dspcntr);
 
-	linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
+	linear_offset = fb->offsets[0] + y * fb->pitches[0] + x * cpp;
 
 	if (INTEL_INFO(dev)->gen >= 4) {
 		intel_crtc->dspaddr_offset =
 			gen4_compute_dspaddr_offset_xtiled(&x, &y,
-							   fb->bits_per_pixel / 8,
-							   fb->pitches[0]);
+							   cpp, fb->pitches[0]);
 		linear_offset -= intel_crtc->dspaddr_offset;
 	} else {
 		intel_crtc->dspaddr_offset = linear_offset;
@@ -2049,6 +2049,7 @@ static int ironlake_update_plane(struct drm_crtc *crtc,
 	unsigned long linear_offset;
 	u32 dspcntr;
 	u32 reg;
+	unsigned int cpp = drm_format_plane_cpp(fb->pixel_format, 0);
 
 	switch (plane) {
 	case 0:
@@ -2105,11 +2106,10 @@ static int ironlake_update_plane(struct drm_crtc *crtc,
 
 	I915_WRITE(reg, dspcntr);
 
-	linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
+	linear_offset = fb->offsets[0] + y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
 	intel_crtc->dspaddr_offset =
 		gen4_compute_dspaddr_offset_xtiled(&x, &y,
-						   fb->bits_per_pixel / 8,
-						   fb->pitches[0]);
+						   cpp, fb->pitches[0]);
 	linear_offset -= intel_crtc->dspaddr_offset;
 
 	DRM_DEBUG_KMS("Writing base %08X %08lX %d %d %d\n",
-- 
1.7.8.6