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Subject[PATCH 5.9 018/133] drm/i915: Reject 90/270 degree rotated initial fbs
Date
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

commit 61334ed227a5852100115180f5535b1396ed5227 upstream.

We don't currently handle the initial fb readout correctly
for 90/270 degree rotated scanout. Reject it.

Cc: stable@vger.kernel.org
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20201020194330.28568-1-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
(cherry picked from commit a40a8305a732f4ecc2186ac7ca132ba062ed770d)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/i915/display/intel_display.c | 4 ++++
1 file changed, 4 insertions(+)

--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -10589,6 +10589,10 @@ skl_get_initial_plane_config(struct inte
val & PLANE_CTL_FLIP_HORIZONTAL)
plane_config->rotation |= DRM_MODE_REFLECT_X;

+ /* 90/270 degree rotation would require extra work */
+ if (drm_rotation_90_or_270(plane_config->rotation))
+ goto error;
+
base = intel_de_read(dev_priv, PLANE_SURF(pipe, plane_id)) & 0xfffff000;
plane_config->base = base;


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