Looks good to me.

Reviewed-by: Sonika Jindal <sonika.jin...@intel.com>

On Thursday 19 March 2015 07:58 PM, ville.syrj...@linux.intel.com wrote:
From: Ville Syrjälä <ville.syrj...@linux.intel.com>

In preparation to movable/resizeable primary planes pass the clipped
plane size to .update_primary_plane().

v2: Pass src size too and use it appropriately (Sonika)

Cc: Sonika Jindal <sonika.jin...@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
  drivers/gpu/drm/i915/i915_drv.h      |  4 +-
  drivers/gpu/drm/i915/intel_display.c | 81 ++++++++++++++++++++++++------------
  2 files changed, 57 insertions(+), 28 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index ec23290..054be42 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -581,7 +581,9 @@ struct drm_i915_display_funcs {
                          uint32_t flags);
        void (*update_primary_plane)(struct drm_crtc *crtc,
                                     struct drm_framebuffer *fb,
-                                    int x, int y);
+                                    int x, int y,
+                                    int src_w, int src_h,
+                                    int crtc_w, int crtc_h);
        void (*hpd_irq_setup)(struct drm_device *dev);
        /* clock updates for mode set */
        /* cursor updates */
diff --git a/drivers/gpu/drm/i915/intel_display.c 
b/drivers/gpu/drm/i915/intel_display.c
index 5499c8e..2e9fdaa 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -2482,7 +2482,9 @@ intel_find_plane_obj(struct intel_crtc *intel_crtc,
static void i9xx_update_primary_plane(struct drm_crtc *crtc,
                                      struct drm_framebuffer *fb,
-                                     int x, int y)
+                                     int x, int y,
+                                     int src_w, int src_h,
+                                     int crtc_w, int crtc_h)
  {
        struct drm_device *dev = crtc->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
@@ -2514,23 +2516,22 @@ static void i9xx_update_primary_plane(struct drm_crtc 
*crtc,
dspcntr |= DISPLAY_PLANE_ENABLE; + WARN_ONCE(src_w != crtc_w || src_h != crtc_h,
+                 "primary plane doesn't support scaling\n");
+
        if (INTEL_INFO(dev)->gen < 4) {
                if (intel_crtc->pipe == PIPE_B)
                        dspcntr |= DISPPLANE_SEL_PIPE_B;
-
-               /* pipesrc and dspsize control the size that is scaled from,
-                * which should always be the user's requested size.
-                */
-               I915_WRITE(DSPSIZE(plane),
-                          ((intel_crtc->config->pipe_src_h - 1) << 16) |
-                          (intel_crtc->config->pipe_src_w - 1));
+               I915_WRITE(DSPSIZE(plane), ((crtc_h - 1) << 16) | (crtc_w - 1));
                I915_WRITE(DSPPOS(plane), 0);
        } else if (IS_CHERRYVIEW(dev) && plane == PLANE_B) {
-               I915_WRITE(PRIMSIZE(plane),
-                          ((intel_crtc->config->pipe_src_h - 1) << 16) |
-                          (intel_crtc->config->pipe_src_w - 1));
+               I915_WRITE(PRIMSIZE(plane), ((crtc_h - 1) << 16) | (crtc_w - 
1));
                I915_WRITE(PRIMPOS(plane), 0);
                I915_WRITE(PRIMCNSTALPHA(plane), 0);
+       } else {
+               WARN_ONCE(crtc_w != intel_crtc->config->pipe_src_w ||
+                         crtc_h != intel_crtc->config->pipe_src_h,
+                         "primary plane size doesn't match pipe size\n");
        }
switch (fb->pixel_format) {
@@ -2586,14 +2587,14 @@ static void i9xx_update_primary_plane(struct drm_crtc 
*crtc,
        if (crtc->primary->state->rotation == BIT(DRM_ROTATE_180)) {
                dspcntr |= DISPPLANE_ROTATE_180;
- x += (intel_crtc->config->pipe_src_w - 1);
-               y += (intel_crtc->config->pipe_src_h - 1);
+               x += (src_w - 1);
+               y += (src_h - 1);
/* Finding the last pixel of the last line of the display
                data and adding to linear_offset*/
                linear_offset +=
-                       (intel_crtc->config->pipe_src_h - 1) * fb->pitches[0] +
-                       (intel_crtc->config->pipe_src_w - 1) * pixel_size;
+                       (src_h - 1) * fb->pitches[0] +
+                       (src_w - 1) * pixel_size;
        }
I915_WRITE(reg, dspcntr);
@@ -2611,7 +2612,9 @@ static void i9xx_update_primary_plane(struct drm_crtc 
*crtc,
static void ironlake_update_primary_plane(struct drm_crtc *crtc,
                                          struct drm_framebuffer *fb,
-                                         int x, int y)
+                                         int x, int y,
+                                         int src_w, int src_h,
+                                         int crtc_w, int crtc_h)
  {
        struct drm_device *dev = crtc->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
@@ -2643,6 +2646,13 @@ static void ironlake_update_primary_plane(struct 
drm_crtc *crtc,
        if (IS_HASWELL(dev) || IS_BROADWELL(dev))
                dspcntr |= DISPPLANE_PIPE_CSC_ENABLE;
+ WARN_ONCE(src_w != crtc_w || src_h != crtc_h,
+                 "primary plane doesn't support scaling\n");
+
+       WARN_ONCE(crtc_w != intel_crtc->config->pipe_src_w ||
+                 crtc_h != intel_crtc->config->pipe_src_h,
+                 "primary plane size doesn't match pipe size\n");
+
        switch (fb->pixel_format) {
        case DRM_FORMAT_C8:
                dspcntr |= DISPPLANE_8BPP;
@@ -2686,14 +2696,14 @@ static void ironlake_update_primary_plane(struct 
drm_crtc *crtc,
                dspcntr |= DISPPLANE_ROTATE_180;
if (!IS_HASWELL(dev) && !IS_BROADWELL(dev)) {
-                       x += (intel_crtc->config->pipe_src_w - 1);
-                       y += (intel_crtc->config->pipe_src_h - 1);
+                       x += (src_w - 1);
+                       y += (src_h - 1);
/* Finding the last pixel of the last line of the display
                        data and adding to linear_offset*/
                        linear_offset +=
-                               (intel_crtc->config->pipe_src_h - 1) * 
fb->pitches[0] +
-                               (intel_crtc->config->pipe_src_w - 1) * 
pixel_size;
+                               (src_h - 1) * fb->pitches[0] +
+                               (src_w - 1) * pixel_size;
                }
        }
@@ -2747,7 +2757,9 @@ u32 intel_fb_stride_alignment(struct drm_device *dev, uint64_t fb_modifier, static void skylake_update_primary_plane(struct drm_crtc *crtc,
                                         struct drm_framebuffer *fb,
-                                        int x, int y)
+                                        int x, int y,
+                                        int src_w, int src_h,
+                                        int crtc_w, int crtc_h)
  {
        struct drm_device *dev = crtc->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
@@ -2767,6 +2779,9 @@ static void skylake_update_primary_plane(struct drm_crtc 
*crtc,
                    PLANE_CTL_PIPE_GAMMA_ENABLE |
                    PLANE_CTL_PIPE_CSC_ENABLE;
+ WARN_ONCE(src_w != crtc_w || src_h != crtc_h,
+                 "primary plane doesn't support scaling\n");
+
        switch (fb->pixel_format) {
        case DRM_FORMAT_RGB565:
                plane_ctl |= PLANE_CTL_FORMAT_RGB_565;
@@ -2826,9 +2841,7 @@ static void skylake_update_primary_plane(struct drm_crtc 
*crtc,
I915_WRITE(PLANE_POS(pipe, 0), 0);
        I915_WRITE(PLANE_OFFSET(pipe, 0), (y << 16) | x);
-       I915_WRITE(PLANE_SIZE(pipe, 0),
-                  (intel_crtc->config->pipe_src_h - 1) << 16 |
-                  (intel_crtc->config->pipe_src_w - 1));
+       I915_WRITE(PLANE_SIZE(pipe, 0), ((src_h - 1) << 16) | (src_w - 1));
        I915_WRITE(PLANE_STRIDE(pipe, 0), fb->pitches[0] / stride_div);
        I915_WRITE(PLANE_SURF(pipe, 0), i915_gem_obj_ggtt_offset(obj));
@@ -2845,12 +2858,18 @@ intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb,
  {
        struct drm_device *dev = crtc->dev;
        struct drm_i915_private *dev_priv = dev->dev_private;
+       struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
if (dev_priv->display.disable_fbc)
                dev_priv->display.disable_fbc(dev);
+ /* FIXME: this will go badly if the fb isn't big enough */
        to_intel_crtc(crtc)->primary_enabled = true;
-       dev_priv->display.update_primary_plane(crtc, fb, x, y);
+       dev_priv->display.update_primary_plane(crtc, fb, x, y,
+                                              intel_crtc->config->pipe_src_w,
+                                              intel_crtc->config->pipe_src_h,
+                                              intel_crtc->config->pipe_src_w,
+                                              intel_crtc->config->pipe_src_h);
return 0;
  }
@@ -2885,7 +2904,11 @@ static void intel_update_primary_planes(struct 
drm_device *dev)
                        dev_priv->display.update_primary_plane(crtc,
                                                               state->base.fb,
                                                               state->src.x1 >> 
16,
-                                                              state->src.y1 >> 
16);
+                                                              state->src.y1 >> 
16,
+                                                              
drm_rect_width(&state->src) >> 16,
+                                                              
drm_rect_height(&state->src) >> 16,
+                                                              
drm_rect_width(&state->dst),
+                                                              
drm_rect_height(&state->dst));
                }
drm_modeset_unlock(&crtc->mutex);
@@ -12070,7 +12093,11 @@ intel_commit_primary_plane(struct drm_plane *plane,
                dev_priv->display.update_primary_plane(crtc,
                                                       state->base.fb,
                                                       state->src.x1 >> 16,
-                                                      state->src.y1 >> 16);
+                                                      state->src.y1 >> 16,
+                                                      drm_rect_width(&state->src) 
>> 16,
+                                                      drm_rect_height(&state->src) 
>> 16,
+                                                      
drm_rect_width(&state->dst),
+                                                      
drm_rect_height(&state->dst));
        }
  }

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