From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
ivb+ supports fp16 pixel formats on the sprite planes planes. Expose
that capability.
On ivb/hsw fp16 scanout is slightly busted. The output from the plane
will have 1/4 the expected value. For the sprite plane we can fix that
up with the plane gamma unit. This was fixed on bdw.
v2: Rebase on top of icl fp16
Split the ivb+ sprite birs into a separate patch
v3: Move ivb_need_sprite_gamma() check one level up so that
we don't waste time programming garbage into he gamma registers
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_sprite.c | 48 ++++++++++++++++++---
1 file changed, 42 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
index 6e371e68c018..bd8ccc2de1da 100644
--- a/drivers/gpu/drm/i915/display/intel_sprite.c
+++ b/drivers/gpu/drm/i915/display/intel_sprite.c
@@ -1285,6 +1285,16 @@ static u32 ivb_sprite_ctl_crtc(const struct intel_crtc_state *crtc_state)
return sprctl;
}
+static bool ivb_need_sprite_gamma(const struct intel_plane_state *plane_state)
+{
+ struct drm_i915_private *dev_priv =
+ to_i915(plane_state->base.plane->dev);
+ const struct drm_framebuffer *fb = plane_state->base.fb;
+
+ return fb->format->cpp[0] == 8 &&
+ (IS_IVYBRIDGE(dev_priv) || IS_HASWELL(dev_priv));
+}
+
static u32 ivb_sprite_ctl(const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state)
{
@@ -1307,6 +1317,12 @@ static u32 ivb_sprite_ctl(const struct intel_crtc_state *crtc_state,
case DRM_FORMAT_XRGB8888:
sprctl |= SPRITE_FORMAT_RGBX888;
break;
+ case DRM_FORMAT_XBGR16161616F:
+ sprctl |= SPRITE_FORMAT_RGBX161616 | SPRITE_RGB_ORDER_RGBX;
+ break;
+ case DRM_FORMAT_XRGB16161616F:
+ sprctl |= SPRITE_FORMAT_RGBX161616;
+ break;
case DRM_FORMAT_YUYV:
sprctl |= SPRITE_FORMAT_YUV422 | SPRITE_YUV_ORDER_YUYV;
break;
@@ -1324,7 +1340,8 @@ static u32 ivb_sprite_ctl(const struct intel_crtc_state *crtc_state,
return 0;
}
- sprctl |= SPRITE_INT_GAMMA_DISABLE;
+ if (!ivb_need_sprite_gamma(plane_state))
+ sprctl |= SPRITE_INT_GAMMA_DISABLE;
if (plane_state->base.color_encoding == DRM_COLOR_YCBCR_BT709)
sprctl |= SPRITE_YUV_TO_RGB_CSC_FORMAT_BT709;
@@ -1346,12 +1363,26 @@ static u32 ivb_sprite_ctl(const struct intel_crtc_state *crtc_state,
return sprctl;
}
-static void ivb_sprite_linear_gamma(u16 gamma[18])
+static void ivb_sprite_linear_gamma(const struct intel_plane_state *plane_state,
+ u16 gamma[18])
{
- int i;
+ int scale, i;
- for (i = 0; i < 17; i++)
- gamma[i] = (i << 10) / 16;
+ /*
+ * WaFP16GammaEnabling:ivb,hsw
+ * "Workaround : When using the 64-bit format, the sprite output
+ * on each color channel has one quarter amplitude. It can be
+ * brought up to full amplitude by using sprite internal gamma
+ * correction, pipe gamma correction, or pipe color space
+ * conversion to multiply the sprite output by four."
+ */
+ scale = 4;
+
+ for (i = 0; i < 16; i++)
+ gamma[i] = min((scale * i << 10) / 16, (1 << 10) - 1);
+
+ gamma[i] = min((scale * i << 10) / 16, 1 << 10);
+ i++;
gamma[i] = 3 << 10;
i++;
@@ -1365,7 +1396,10 @@ static void ivb_update_gamma(const struct intel_plane_state *plane_state)
u16 gamma[18];
int i;
- ivb_sprite_linear_gamma(gamma);
+ if (!ivb_need_sprite_gamma(plane_state))
+ return;
+
+ ivb_sprite_linear_gamma(plane_state, gamma);
/* FIXME these register are single buffered :( */
for (i = 0; i < 16; i++)
@@ -2507,6 +2541,8 @@ static bool snb_sprite_format_mod_supported(struct drm_plane *_plane,
switch (format) {
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_XRGB16161616F:
+ case DRM_FORMAT_XBGR16161616F:
case DRM_FORMAT_YUYV:
case DRM_FORMAT_YVYU:
case DRM_FORMAT_UYVY:
--
2.21.0
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