From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Unlike all the other pre-snb desktop platforms i865 actually
supports FBC. Let's enable it.
Quote from the spec:
"DevSDG provides the same Run-Length Encoded Frame Buffer
Compression (RLEFBC) function as exists in DevMGM."
As i865 only has the one pipe we want to skip massaging the
plane<->pipe assignment aimed at getting FBC+LVDS working on
the mobile platforms.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_display.c | 3 ++-
drivers/gpu/drm/i915/i915_pci.c | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index e5fa49337883..a0d1057d75ee 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -16186,7 +16186,8 @@ intel_primary_plane_create(struct drm_i915_private *dev_priv, enum pipe pipe)
* On gen2/3 only plane A can do FBC, but the panel fitter and LVDS
* port is hooked to pipe B. Hence we want plane A feeding pipe B.
*/
- if (HAS_FBC(dev_priv) && INTEL_GEN(dev_priv) < 4)
+ if (HAS_FBC(dev_priv) && INTEL_GEN(dev_priv) < 4 &&
+ INTEL_NUM_PIPES(dev_priv) == 2)
plane->i9xx_plane = (enum i9xx_plane_id) !pipe;
else
plane->i9xx_plane = (enum i9xx_plane_id) pipe;
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 1faf9d6ec0a4..71afe7bc3d2d 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -217,6 +217,7 @@ static const struct intel_device_info i85x_info = {
static const struct intel_device_info i865g_info = {
I845_FEATURES,
PLATFORM(INTEL_I865G),
+ .display.has_fbc = 1,
};
#define GEN3_FEATURES \
--
2.24.1
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