From: Chandra Konduru <chandra.kond...@intel.com>

This patch updates scaler max limit support for NV12

v2: Rebased (me)

v3: Rebased (me)

v4: Missed the Tested-by/Reviewed-by in the previous series
        Adding the same to commit message in this version.

v5: Addressed review comments from Ville and rebased
        - calculation of max_scale to be made
        less convoluted by splitting it up a bit
        - Indentation errors to be fixed in the series

Tested-by: Clinton Taylor <clinton.a.tay...@intel.com>
Reviewed-by: Clinton Taylor <clinton.a.tay...@intel.com>
Signed-off-by: Chandra Konduru <chandra.kond...@intel.com>
Signed-off-by: Nabendu Maiti <nabendu.bikash.ma...@intel.com>
Signed-off-by: Vidya Srinivas <vidya.srini...@intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 33 +++++++++++++++++++++++----------
 drivers/gpu/drm/i915/intel_drv.h     |  3 ++-
 drivers/gpu/drm/i915/intel_sprite.c  |  3 ++-
 3 files changed, 27 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 2d3069c..390ef5c 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -3426,6 +3426,8 @@ static u32 skl_plane_ctl_format(uint32_t pixel_format)
                return PLANE_CTL_FORMAT_YUV422 | PLANE_CTL_YUV422_UYVY;
        case DRM_FORMAT_VYUY:
                return PLANE_CTL_FORMAT_YUV422 | PLANE_CTL_YUV422_VYUY;
+       case DRM_FORMAT_NV12:
+               return PLANE_CTL_FORMAT_NV12;
        default:
                MISSING_CASE(pixel_format);
        }
@@ -4671,7 +4673,8 @@ static void cpt_verify_modeset(struct drm_device *dev, 
int pipe)
 static int
 skl_update_scaler(struct intel_crtc_state *crtc_state, bool force_detach,
                  unsigned int scaler_user, int *scaler_id,
-                 int src_w, int src_h, int dst_w, int dst_h)
+                 int src_w, int src_h, int dst_w, int dst_h,
+                 uint32_t pixel_format)
 {
        struct intel_crtc_scaler_state *scaler_state =
                &crtc_state->scaler_state;
@@ -4687,7 +4690,8 @@ static void cpt_verify_modeset(struct drm_device *dev, 
int pipe)
         * the 90/270 degree plane rotation cases (to match the
         * GTT mapping), hence no need to account for rotation here.
         */
-       need_scaling = src_w != dst_w || src_h != dst_h;
+       need_scaling = src_w != dst_w || src_h != dst_h ||
+               (pixel_format == DRM_FORMAT_NV12);
 
        /*
         * Scaling/fitting not supported in IF-ID mode in GEN9+
@@ -4763,7 +4767,7 @@ int skl_update_scaler_crtc(struct intel_crtc_state *state)
        return skl_update_scaler(state, !state->base.active, SKL_CRTC_INDEX,
                &state->scaler_state.scaler_id,
                state->pipe_src_w, state->pipe_src_h,
-               adjusted_mode->crtc_hdisplay, adjusted_mode->crtc_vdisplay);
+               adjusted_mode->crtc_hdisplay, adjusted_mode->crtc_vdisplay, 0);
 }
 
 /**
@@ -4793,7 +4797,8 @@ static int skl_update_scaler_plane(struct 
intel_crtc_state *crtc_state,
                                drm_rect_width(&plane_state->base.src) >> 16,
                                drm_rect_height(&plane_state->base.src) >> 16,
                                drm_rect_width(&plane_state->base.dst),
-                               drm_rect_height(&plane_state->base.dst));
+                               drm_rect_height(&plane_state->base.dst),
+                               fb ? fb->format->format : 0);
 
        if (ret || plane_state->scaler_id < 0)
                return ret;
@@ -4819,6 +4824,7 @@ static int skl_update_scaler_plane(struct 
intel_crtc_state *crtc_state,
        case DRM_FORMAT_YVYU:
        case DRM_FORMAT_UYVY:
        case DRM_FORMAT_VYUY:
+       case DRM_FORMAT_NV12:
                break;
        default:
                DRM_DEBUG_KMS("[PLANE:%d:%s] FB:%d unsupported scaling format 
0x%x\n",
@@ -12674,11 +12680,12 @@ static int intel_atomic_commit(struct drm_device *dev,
 }
 
 int
-skl_max_scale(struct intel_crtc *intel_crtc, struct intel_crtc_state 
*crtc_state)
+skl_max_scale(struct intel_crtc *intel_crtc,
+       struct intel_crtc_state *crtc_state, uint32_t pixel_format)
 {
        struct drm_i915_private *dev_priv;
-       int max_scale;
-       int crtc_clock, max_dotclk;
+       int max_scale, mult;
+       int crtc_clock, max_dotclk, tmpclk1, tmpclk2;
 
        if (!intel_crtc || !crtc_state->base.enable)
                return DRM_PLANE_HELPER_NO_SCALING;
@@ -12700,8 +12707,10 @@ static int intel_atomic_commit(struct drm_device *dev,
         *            or
         *    cdclk/crtc_clock
         */
-       max_scale = min((1 << 16) * 3 - 1,
-                       (1 << 8) * ((max_dotclk << 8) / crtc_clock));
+       mult = pixel_format == DRM_FORMAT_NV12 ? 2 : 3;
+       tmpclk1 = (1 << 16) * (mult - 1);
+       tmpclk2 = (1 << 8) * ((max_dotclk << 8) / crtc_clock);
+       max_scale = min(tmpclk1, tmpclk2);
 
        return max_scale;
 }
@@ -12722,7 +12731,11 @@ static int intel_atomic_commit(struct drm_device *dev,
                /* use scaler when colorkey is not required */
                if (state->ckey.flags == I915_SET_COLORKEY_NONE) {
                        min_scale = 1;
-                       max_scale = skl_max_scale(to_intel_crtc(crtc), 
crtc_state);
+                       max_scale = skl_max_scale(to_intel_crtc(crtc),
+                                               crtc_state,
+                                               state->base.fb ?
+                                               state->base.fb->format->format :
+                                               0);
                }
                can_position = true;
        }
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 021cc54..6f9c631 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1456,7 +1456,8 @@ void intel_mode_from_pipe_config(struct drm_display_mode 
*mode,
                                 struct intel_crtc_state *pipe_config);
 
 int skl_update_scaler_crtc(struct intel_crtc_state *crtc_state);
-int skl_max_scale(struct intel_crtc *crtc, struct intel_crtc_state 
*crtc_state);
+int skl_max_scale(struct intel_crtc *crtc, struct intel_crtc_state *crtc_state,
+       uint32_t pixel_format);
 
 static inline u32 intel_plane_ggtt_offset(const struct intel_plane_state 
*state)
 {
diff --git a/drivers/gpu/drm/i915/intel_sprite.c 
b/drivers/gpu/drm/i915/intel_sprite.c
index a38b4f3..24f769a 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -817,7 +817,8 @@ static u32 g4x_sprite_ctl(const struct intel_crtc_state 
*crtc_state,
                if (state->ckey.flags == I915_SET_COLORKEY_NONE) {
                        can_scale = 1;
                        min_scale = 1;
-                       max_scale = skl_max_scale(crtc, crtc_state);
+                       max_scale = skl_max_scale(crtc, crtc_state,
+                                               fb->format->format);
                } else {
                        can_scale = 0;
                        min_scale = DRM_PLANE_HELPER_NO_SCALING;
-- 
1.9.1

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