drm/msm/mdp5: fix cursor ROI

If cursor is set near the edge of the screen, it is not valid to use the
new cursor width/height as the ROI dimensions.  Split out the ROI calc
and use it both cursor_set and cursor_move.

Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c
index 2aeae73..4c4be43 100644 (file)
--- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c
+++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_crtc.c
@@ -62,8 +62,8 @@ struct mdp5_crtc {
 
                /* current cursor being scanned out: */
                struct drm_gem_object *scanout_bo;
-               uint32_t width;
-               uint32_t height;
+               uint32_t width, height;
+               uint32_t x, y;
        } cursor;
 };
 #define to_mdp5_crtc(x) container_of(x, struct mdp5_crtc, base)
@@ -411,6 +411,32 @@ static int mdp5_crtc_set_property(struct drm_crtc *crtc,
        return -EINVAL;
 }
 
+static void get_roi(struct drm_crtc *crtc, uint32_t *roi_w, uint32_t *roi_h)
+{
+       struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
+       uint32_t xres = crtc->mode.hdisplay;
+       uint32_t yres = crtc->mode.vdisplay;
+
+       /*
+        * Cursor Region Of Interest (ROI) is a plane read from cursor
+        * buffer to render. The ROI region is determined by the visibility of
+        * the cursor point. In the default Cursor image the cursor point will
+        * be at the top left of the cursor image, unless it is specified
+        * otherwise using hotspot feature.
+        *
+        * If the cursor point reaches the right (xres - x < cursor.width) or
+        * bottom (yres - y < cursor.height) boundary of the screen, then ROI
+        * width and ROI height need to be evaluated to crop the cursor image
+        * accordingly.
+        * (xres-x) will be new cursor width when x > (xres - cursor.width)
+        * (yres-y) will be new cursor height when y > (yres - cursor.height)
+        */
+       *roi_w = min(mdp5_crtc->cursor.width, xres -
+                       mdp5_crtc->cursor.x);
+       *roi_h = min(mdp5_crtc->cursor.height, yres -
+                       mdp5_crtc->cursor.y);
+}
+
 static int mdp5_crtc_cursor_set(struct drm_crtc *crtc,
                struct drm_file *file, uint32_t handle,
                uint32_t width, uint32_t height)
@@ -424,6 +450,7 @@ static int mdp5_crtc_cursor_set(struct drm_crtc *crtc,
        unsigned int depth;
        enum mdp5_cursor_alpha cur_alpha = CURSOR_ALPHA_PER_PIXEL;
        uint32_t flush_mask = mdp_ctl_flush_mask_cursor(0);
+       uint32_t roi_w, roi_h;
        unsigned long flags;
 
        if ((width > CURSOR_WIDTH) || (height > CURSOR_HEIGHT)) {
@@ -454,6 +481,12 @@ static int mdp5_crtc_cursor_set(struct drm_crtc *crtc,
        spin_lock_irqsave(&mdp5_crtc->cursor.lock, flags);
        old_bo = mdp5_crtc->cursor.scanout_bo;
 
+       mdp5_crtc->cursor.scanout_bo = cursor_bo;
+       mdp5_crtc->cursor.width = width;
+       mdp5_crtc->cursor.height = height;
+
+       get_roi(crtc, &roi_w, &roi_h);
+
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_STRIDE(lm), stride);
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_FORMAT(lm),
                        MDP5_LM_CURSOR_FORMAT_FORMAT(CURSOR_FMT_ARGB8888));
@@ -461,19 +494,15 @@ static int mdp5_crtc_cursor_set(struct drm_crtc *crtc,
                        MDP5_LM_CURSOR_IMG_SIZE_SRC_H(height) |
                        MDP5_LM_CURSOR_IMG_SIZE_SRC_W(width));
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_SIZE(lm),
-                       MDP5_LM_CURSOR_SIZE_ROI_H(height) |
-                       MDP5_LM_CURSOR_SIZE_ROI_W(width));
+                       MDP5_LM_CURSOR_SIZE_ROI_H(roi_h) |
+                       MDP5_LM_CURSOR_SIZE_ROI_W(roi_w));
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_BASE_ADDR(lm), cursor_addr);
 
-
        blendcfg = MDP5_LM_CURSOR_BLEND_CONFIG_BLEND_EN;
        blendcfg |= MDP5_LM_CURSOR_BLEND_CONFIG_BLEND_TRANSP_EN;
        blendcfg |= MDP5_LM_CURSOR_BLEND_CONFIG_BLEND_ALPHA_SEL(cur_alpha);
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_BLEND_CONFIG(lm), blendcfg);
 
-       mdp5_crtc->cursor.scanout_bo = cursor_bo;
-       mdp5_crtc->cursor.width = width;
-       mdp5_crtc->cursor.height = height;
        spin_unlock_irqrestore(&mdp5_crtc->cursor.lock, flags);
 
        ret = mdp5_ctl_set_cursor(mdp5_crtc->ctl, true);
@@ -497,8 +526,6 @@ static int mdp5_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
        struct mdp5_kms *mdp5_kms = get_kms(crtc);
        struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
        uint32_t flush_mask = mdp_ctl_flush_mask_cursor(0);
-       uint32_t xres = crtc->mode.hdisplay;
-       uint32_t yres = crtc->mode.vdisplay;
        uint32_t roi_w;
        uint32_t roi_h;
        unsigned long flags;
@@ -507,25 +534,10 @@ static int mdp5_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
        if (unlikely(!crtc->state->enable))
                return 0;
 
-       x = (x > 0) ? x : 0;
-       y = (y > 0) ? y : 0;
+       mdp5_crtc->cursor.x = x = max(x, 0);
+       mdp5_crtc->cursor.y = y = max(y, 0);
 
-       /*
-        * Cursor Region Of Interest (ROI) is a plane read from cursor
-        * buffer to render. The ROI region is determined by the visiblity of
-        * the cursor point. In the default Cursor image the cursor point will
-        * be at the top left of the cursor image, unless it is specified
-        * otherwise using hotspot feature.
-        *
-        * If the cursor point reaches the right (xres - x < cursor.width) or
-        * bottom (yres - y < cursor.height) boundary of the screen, then ROI
-        * width and ROI height need to be evaluated to crop the cursor image
-        * accordingly.
-        * (xres-x) will be new cursor width when x > (xres - cursor.width)
-        * (yres-y) will be new cursor height when y > (yres - cursor.height)
-        */
-       roi_w = min(mdp5_crtc->cursor.width, xres - x);
-       roi_h = min(mdp5_crtc->cursor.height, yres - y);
+       get_roi(crtc, &roi_w, &roi_h);
 
        spin_lock_irqsave(&mdp5_crtc->cursor.lock, flags);
        mdp5_write(mdp5_kms, REG_MDP5_LM_CURSOR_SIZE(mdp5_crtc->lm),