On Fri, 26 May 2023, Ville Syrjälä <[email protected]> wrote: > On Fri, May 26, 2023 at 07:37:54PM +0300, Jani Nikula wrote: >> We assume the plane offset is 0. Warn if it's not. This also fixes a >> warn on unused but set variable offset. >> >> Suggested-by: Ville Syrjälä <[email protected]> >> Signed-off-by: Jani Nikula <[email protected]> >> --- >> drivers/gpu/drm/i915/display/i9xx_plane.c | 2 ++ >> drivers/gpu/drm/i915/display/skl_universal_plane.c | 1 + >> 2 files changed, 3 insertions(+) >> >> diff --git a/drivers/gpu/drm/i915/display/i9xx_plane.c >> b/drivers/gpu/drm/i915/display/i9xx_plane.c >> index 616654adbfb8..b52a681ca85e 100644 >> --- a/drivers/gpu/drm/i915/display/i9xx_plane.c >> +++ b/drivers/gpu/drm/i915/display/i9xx_plane.c >> @@ -1037,6 +1037,8 @@ i9xx_get_initial_plane_config(struct intel_crtc *crtc, >> } >> plane_config->base = base; >> >> + drm_WARN_ON(&dev_priv->drm, offset != 0); >> + > > The gen2/3 codepath doesn't appear to initialize offset at all.
Right. I wonder why I didn't get a warning about using an uninitialized variable. > > With that fixed this is > Reviewed-by: Ville Syrjälä <[email protected]> Thanks, v2 sent. > >> val = intel_de_read(dev_priv, PIPESRC(pipe)); >> fb->width = REG_FIELD_GET(PIPESRC_WIDTH_MASK, val) + 1; >> fb->height = REG_FIELD_GET(PIPESRC_HEIGHT_MASK, val) + 1; >> diff --git a/drivers/gpu/drm/i915/display/skl_universal_plane.c >> b/drivers/gpu/drm/i915/display/skl_universal_plane.c >> index 36070d86550f..6b01a0b68b97 100644 >> --- a/drivers/gpu/drm/i915/display/skl_universal_plane.c >> +++ b/drivers/gpu/drm/i915/display/skl_universal_plane.c >> @@ -2529,6 +2529,7 @@ skl_get_initial_plane_config(struct intel_crtc *crtc, >> plane_config->base = base; >> >> offset = intel_de_read(dev_priv, PLANE_OFFSET(pipe, plane_id)); >> + drm_WARN_ON(&dev_priv->drm, offset != 0); >> >> val = intel_de_read(dev_priv, PLANE_SIZE(pipe, plane_id)); >> fb->height = REG_FIELD_GET(PLANE_HEIGHT_MASK, val) + 1; >> -- >> 2.39.2 -- Jani Nikula, Intel Open Source Graphics Center
