drm/i915: Extract i845_cursor_ctl() and i9xx_cursor_ctl()

Pull the code to calculate the cursor control register value into
separate functions. Allows us to pre-compute them in the future.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170317211808.14693-8-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 8a9f1bd21e0e0e687c9f3140d07c7988db44d1b6..9a28a8917dc10400523a3855aead84ab03e44e8b 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -9179,7 +9179,33 @@ static bool haswell_get_pipe_config(struct intel_crtc *crtc,
        return active;
 }
 
+static u32 i845_cursor_ctl(const struct intel_crtc_state *crtc_state,
+                          const struct intel_plane_state *plane_state)
+{
+       unsigned int width = plane_state->base.crtc_w;
+       unsigned int stride = roundup_pow_of_two(width) * 4;
+
+       switch (stride) {
+       default:
+               WARN_ONCE(1, "Invalid cursor width/stride, width=%u, stride=%u\n",
+                         width, stride);
+               stride = 256;
+               /* fallthrough */
+       case 256:
+       case 512:
+       case 1024:
+       case 2048:
+               break;
+       }
+
+       return CURSOR_ENABLE |
+               CURSOR_GAMMA_ENABLE |
+               CURSOR_FORMAT_ARGB |
+               CURSOR_STRIDE(stride);
+}
+
 static void i845_update_cursor(struct drm_crtc *crtc, u32 base,
+                              const struct intel_crtc_state *crtc_state,
                               const struct intel_plane_state *plane_state)
 {
        struct drm_device *dev = crtc->dev;
@@ -9190,26 +9216,8 @@ static void i845_update_cursor(struct drm_crtc *crtc, u32 base,
        if (plane_state && plane_state->base.visible) {
                unsigned int width = plane_state->base.crtc_w;
                unsigned int height = plane_state->base.crtc_h;
-               unsigned int stride = roundup_pow_of_two(width) * 4;
-
-               switch (stride) {
-               default:
-                       WARN_ONCE(1, "Invalid cursor width/stride, width=%u, stride=%u\n",
-                                 width, stride);
-                       stride = 256;
-                       /* fallthrough */
-               case 256:
-               case 512:
-               case 1024:
-               case 2048:
-                       break;
-               }
-
-               cntl |= CURSOR_ENABLE |
-                       CURSOR_GAMMA_ENABLE |
-                       CURSOR_FORMAT_ARGB |
-                       CURSOR_STRIDE(stride);
 
+               cntl = i845_cursor_ctl(crtc_state, plane_state);
                size = (height << 12) | width;
        }
 
@@ -9242,7 +9250,45 @@ static void i845_update_cursor(struct drm_crtc *crtc, u32 base,
        }
 }
 
+static u32 i9xx_cursor_ctl(const struct intel_crtc_state *crtc_state,
+                          const struct intel_plane_state *plane_state)
+{
+       struct drm_i915_private *dev_priv =
+               to_i915(plane_state->base.plane->dev);
+       struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+       enum pipe pipe = crtc->pipe;
+       u32 cntl;
+
+       cntl = MCURSOR_GAMMA_ENABLE;
+
+       if (HAS_DDI(dev_priv))
+               cntl |= CURSOR_PIPE_CSC_ENABLE;
+
+       cntl |= pipe << 28; /* Connect to correct pipe */
+
+       switch (plane_state->base.crtc_w) {
+       case 64:
+               cntl |= CURSOR_MODE_64_ARGB_AX;
+               break;
+       case 128:
+               cntl |= CURSOR_MODE_128_ARGB_AX;
+               break;
+       case 256:
+               cntl |= CURSOR_MODE_256_ARGB_AX;
+               break;
+       default:
+               MISSING_CASE(plane_state->base.crtc_w);
+               return 0;
+       }
+
+       if (plane_state->base.rotation & DRM_ROTATE_180)
+               cntl |= CURSOR_ROTATE_180;
+
+       return cntl;
+}
+
 static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base,
+                              const struct intel_crtc_state *crtc_state,
                               const struct intel_plane_state *plane_state)
 {
        struct drm_device *dev = crtc->dev;
@@ -9251,30 +9297,8 @@ static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base,
        int pipe = intel_crtc->pipe;
        uint32_t cntl = 0;
 
-       if (plane_state && plane_state->base.visible) {
-               cntl = MCURSOR_GAMMA_ENABLE;
-               switch (plane_state->base.crtc_w) {
-                       case 64:
-                               cntl |= CURSOR_MODE_64_ARGB_AX;
-                               break;
-                       case 128:
-                               cntl |= CURSOR_MODE_128_ARGB_AX;
-                               break;
-                       case 256:
-                               cntl |= CURSOR_MODE_256_ARGB_AX;
-                               break;
-                       default:
-                               MISSING_CASE(plane_state->base.crtc_w);
-                               return;
-               }
-               cntl |= pipe << 28; /* Connect to correct pipe */
-
-               if (HAS_DDI(dev_priv))
-                       cntl |= CURSOR_PIPE_CSC_ENABLE;
-
-               if (plane_state->base.rotation & DRM_ROTATE_180)
-                       cntl |= CURSOR_ROTATE_180;
-       }
+       if (plane_state && plane_state->base.visible)
+               cntl = i9xx_cursor_ctl(crtc_state, plane_state);
 
        if (intel_crtc->cursor_cntl != cntl) {
                I915_WRITE_FW(CURCNTR(pipe), cntl);
@@ -9291,6 +9315,7 @@ static void i9xx_update_cursor(struct drm_crtc *crtc, u32 base,
 
 /* If no-part of the cursor is visible on the framebuffer, then the GPU may hang... */
 static void intel_crtc_update_cursor(struct drm_crtc *crtc,
+                                    const struct intel_crtc_state *crtc_state,
                                     const struct intel_plane_state *plane_state)
 {
        struct drm_device *dev = crtc->dev;
@@ -9330,9 +9355,9 @@ static void intel_crtc_update_cursor(struct drm_crtc *crtc,
        I915_WRITE_FW(CURPOS(pipe), pos);
 
        if (IS_I845G(dev_priv) || IS_I865G(dev_priv))
-               i845_update_cursor(crtc, base, plane_state);
+               i845_update_cursor(crtc, base, crtc_state, plane_state);
        else
-               i9xx_update_cursor(crtc, base, plane_state);
+               i9xx_update_cursor(crtc, base, crtc_state, plane_state);
 
        spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
 }
@@ -13762,7 +13787,7 @@ intel_disable_cursor_plane(struct drm_plane *plane,
        struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 
        intel_crtc->cursor_addr = 0;
-       intel_crtc_update_cursor(crtc, NULL);
+       intel_crtc_update_cursor(crtc, NULL, NULL);
 }
 
 static void
@@ -13784,7 +13809,7 @@ intel_update_cursor_plane(struct drm_plane *plane,
                addr = obj->phys_handle->busaddr;
 
        intel_crtc->cursor_addr = addr;
-       intel_crtc_update_cursor(crtc, state);
+       intel_crtc_update_cursor(crtc, crtc_state, state);
 }
 
 static struct intel_plane *