The driver doesn't consider framebuffer pitch and offset, leading to a
wrong display in case offset != 0 or pitch != width * bpp. Fix it.
Signed-off-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
---
drivers/gpu/drm/bochs/bochs.h | 2 +-
drivers/gpu/drm/bochs/bochs_hw.c | 14 ++++++++++----
drivers/gpu/drm/bochs/bochs_kms.c | 3 ++-
3 files changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/bochs/bochs.h b/drivers/gpu/drm/bochs/bochs.h
index cc35d492142c..2a65434500ee 100644
--- a/drivers/gpu/drm/bochs/bochs.h
+++ b/drivers/gpu/drm/bochs/bochs.h
@@ -86,7 +86,7 @@ void bochs_hw_setmode(struct bochs_device *bochs,
void bochs_hw_setformat(struct bochs_device *bochs,
const struct drm_format_info *format);
void bochs_hw_setbase(struct bochs_device *bochs,
- int x, int y, u64 addr);
+ int x, int y, int stride, u64 addr);
int bochs_hw_load_edid(struct bochs_device *bochs);
/* bochs_mm.c */
diff --git a/drivers/gpu/drm/bochs/bochs_hw.c b/drivers/gpu/drm/bochs/bochs_hw.c
index 791ab2f79947..ebfea8744fe6 100644
--- a/drivers/gpu/drm/bochs/bochs_hw.c
+++ b/drivers/gpu/drm/bochs/bochs_hw.c
@@ -255,16 +255,22 @@ void bochs_hw_setformat(struct bochs_device *bochs,
}
void bochs_hw_setbase(struct bochs_device *bochs,
- int x, int y, u64 addr)
+ int x, int y, int stride, u64 addr)
{
- unsigned long offset = (unsigned long)addr +
+ unsigned long offset;
+ unsigned int vx, vy, vwidth;
+
+ bochs->stride = stride;
+ offset = (unsigned long)addr +
y * bochs->stride +
x * (bochs->bpp / 8);
- int vy = offset / bochs->stride;
- int vx = (offset % bochs->stride) * 8 / bochs->bpp;
+ vy = offset / bochs->stride;
+ vx = (offset % bochs->stride) * 8 / bochs->bpp;
+ vwidth = stride * 8 / bochs->bpp;
DRM_DEBUG_DRIVER("x %d, y %d, addr %llx -> offset %lx, vx %d, vy %d\n",
x, y, addr, offset, vx, vy);
+ bochs_dispi_write(bochs, VBE_DISPI_INDEX_VIRT_WIDTH, vwidth);
bochs_dispi_write(bochs, VBE_DISPI_INDEX_X_OFFSET, vx);
bochs_dispi_write(bochs, VBE_DISPI_INDEX_Y_OFFSET, vy);
}
diff --git a/drivers/gpu/drm/bochs/bochs_kms.c b/drivers/gpu/drm/bochs/bochs_kms.c
index 5904eddc83a5..bc19dbd531ef 100644
--- a/drivers/gpu/drm/bochs/bochs_kms.c
+++ b/drivers/gpu/drm/bochs/bochs_kms.c
@@ -36,7 +36,8 @@ static void bochs_plane_update(struct bochs_device *bochs,
bochs_hw_setbase(bochs,
state->crtc_x,
state->crtc_y,
- gbo->bo.offset);
+ state->fb->pitches[0],
+ state->fb->offsets[0] + gbo->bo.offset);
bochs_hw_setformat(bochs, state->fb->format);
}
--
2.18.1
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