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Merge tag 'drm-intel-next-fixes-2023-04-27' of git://anongit.freedesktop.org/drm/drm-intel into drm-next

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One cc stable for pipe source size check on SKL+

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ZEpbSG1ZOSVqzGLx@jlahtine-mobl.ger.corp.intel.com
This commit is contained in:
Dave Airlie 2023-05-05 11:23:11 +10:00
commit fa0d9c066d
1 changed files with 17 additions and 0 deletions
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17
drivers/gpu/drm/i915/display/skl_scaler.c
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@ -111,6 +111,8 @@ skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
const struct drm_display_mode *adjusted_mode =
&crtc_state->hw.adjusted_mode;
int pipe_src_w = drm_rect_width(&crtc_state->pipe_src);
int pipe_src_h = drm_rect_height(&crtc_state->pipe_src);
int min_src_w, min_src_h, min_dst_w, min_dst_h;
int max_src_w, max_src_h, max_dst_w, max_dst_h;
@ -207,6 +209,21 @@ skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
return -EINVAL;
}
/*
* The pipe scaler does not use all the bits of PIPESRC, at least
* on the earlier platforms. So even when we're scaling a plane
* the *pipe* source size must not be too large. For simplicity
* we assume the limits match the scaler source size limits. Might
* not be 100% accurate on all platforms, but good enough for now.
*/
if (pipe_src_w > max_src_w || pipe_src_h > max_src_h) {
drm_dbg_kms(&dev_priv->drm,
"scaler_user index %u.%u: pipe src size %ux%u "
"is out of scaler range\n",
crtc->pipe, scaler_user, pipe_src_w, pipe_src_h);
return -EINVAL;
}
/* mark this plane as a scaler user in crtc_state */
scaler_state->scaler_users |= (1 << scaler_user);
drm_dbg_kms(&dev_priv->drm, "scaler_user index %u.%u: "