[PATCH] modesetting: query cursor size from the kernel

[Alex Deucher <alexdeucher@gmail.com>]

Use new drm caps.  This allows hw cursors to work
correctly on gpus with non-64x64 cursors.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
 src/driver.c          | 21 ++++++++++++++++++++-
 src/driver.h          |  1 +
 src/drmmode_display.c | 20 +++++++++++++++-----
 3 files changed, 36 insertions(+), 6 deletions(-)

diff --git a/src/driver.c b/src/driver.c
index b84624e..b28622a 100644
--- a/src/driver.c
+++ b/src/driver.c
@@ -566,6 +566,14 @@ FreeRec(ScrnInfoPtr pScrn)
 
 }
 
+#ifndef DRM_CAP_CURSOR_WIDTH
+#define DRM_CAP_CURSOR_WIDTH 0x8
+#endif
+
+#ifndef DRM_CAP_CURSOR_HEIGHT
+#define DRM_CAP_CURSOR_HEIGHT 0x9
+#endif
+
 static Bool
 PreInit(ScrnInfoPtr pScrn, int flags)
 {
@@ -706,6 +714,17 @@ PreInit(ScrnInfoPtr pScrn, int flags)
 	prefer_shadow = !!value;
     }
 
+    ms->cursor_width = 64;
+    ms->cursor_height = 64;
+    ret = drmGetCap(ms->fd, DRM_CAP_CURSOR_WIDTH, &value);
+    if (!ret) {
+	ms->cursor_width = value;
+    }
+    ret = drmGetCap(ms->fd, DRM_CAP_CURSOR_HEIGHT, &value);
+    if (!ret) {
+	ms->cursor_height = value;
+    }
+
     ms->drmmode.shadow_enable = xf86ReturnOptValBool(ms->Options, OPTION_SHADOW_FB, prefer_shadow);
 
     xf86DrvMsg(pScrn->scrnIndex, X_INFO, "ShadowFB: preferred %s, enabled %s\n", prefer_shadow ? "YES" : "NO", ms->drmmode.shadow_enable ? "YES" : "NO");
@@ -933,7 +952,7 @@ ScreenInit(SCREEN_INIT_ARGS_DECL)
 
     /* Need to extend HWcursor support to handle mask interleave */
     if (!ms->drmmode.sw_cursor)
-	xf86_cursors_init(pScreen, 64, 64,
+	xf86_cursors_init(pScreen, ms->cursor_width, ms->cursor_height,
 			  HARDWARE_CURSOR_SOURCE_MASK_INTERLEAVE_64 |
 			  HARDWARE_CURSOR_ARGB);
 
diff --git a/src/driver.h b/src/driver.h
index 79561c8..e84d748 100644
--- a/src/driver.h
+++ b/src/driver.h
@@ -76,6 +76,7 @@ typedef struct _modesettingRec
     DamagePtr damage;
     Bool dirty_enabled;
 
+    uint32_t cursor_width, cursor_height;
 } modesettingRec, *modesettingPtr;
 
 #define modesettingPTR(p) ((modesettingPtr)((p)->driverPrivate))
diff --git a/src/drmmode_display.c b/src/drmmode_display.c
index 25641ce..ccfd75f 100644
--- a/src/drmmode_display.c
+++ b/src/drmmode_display.c
@@ -52,6 +52,8 @@
 #endif
 #include "compat-api.h"
 
+#include "driver.h"
+
 static struct dumb_bo *dumb_bo_create(int fd,
 			  const unsigned width, const unsigned height,
 			  const unsigned bpp)
@@ -445,6 +447,7 @@ drmmode_set_cursor_position (xf86CrtcPtr crtc, int x, int y)
 static void
 drmmode_load_cursor_argb (xf86CrtcPtr crtc, CARD32 *image)
 {
+	modesettingPtr ms = modesettingPTR(crtc->scrn);
 	drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
 	int i;
 	uint32_t *ptr;
@@ -453,10 +456,11 @@ drmmode_load_cursor_argb (xf86CrtcPtr crtc, CARD32 *image)
 	/* cursor should be mapped already */
 	ptr = (uint32_t *)(drmmode_crtc->cursor_bo->ptr);
 
-	for (i = 0; i < 64 * 64; i++)
+	for (i = 0; i < ms->cursor_width * ms->cursor_height; i++)
 		ptr[i] = image[i];// cpu_to_le32(image[i]);
 
-	ret = drmModeSetCursor(drmmode_crtc->drmmode->fd, drmmode_crtc->mode_crtc->crtc_id, handle, 64, 64);
+	ret = drmModeSetCursor(drmmode_crtc->drmmode->fd, drmmode_crtc->mode_crtc->crtc_id, handle,
+			       ms->cursor_width, ms->cursor_height);
 	if (ret) {
 		xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(crtc->scrn);
 		xf86CursorInfoPtr	cursor_info = xf86_config->cursor_info;
@@ -471,21 +475,25 @@ drmmode_load_cursor_argb (xf86CrtcPtr crtc, CARD32 *image)
 static void
 drmmode_hide_cursor (xf86CrtcPtr crtc)
 {
+	modesettingPtr ms = modesettingPTR(crtc->scrn);
 	drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
 	drmmode_ptr drmmode = drmmode_crtc->drmmode;
 
-	drmModeSetCursor(drmmode->fd, drmmode_crtc->mode_crtc->crtc_id, 0, 64, 64);
+	drmModeSetCursor(drmmode->fd, drmmode_crtc->mode_crtc->crtc_id, 0,
+			 ms->cursor_width, ms->cursor_height);
 
 }
 
 static void
 drmmode_show_cursor (xf86CrtcPtr crtc)
 {
+	modesettingPtr ms = modesettingPTR(crtc->scrn);
 	drmmode_crtc_private_ptr drmmode_crtc = crtc->driver_private;
 	drmmode_ptr drmmode = drmmode_crtc->drmmode;
 	uint32_t handle = drmmode_crtc->cursor_bo->handle;
 
-	drmModeSetCursor(drmmode->fd, drmmode_crtc->mode_crtc->crtc_id, handle, 64, 64);
+	drmModeSetCursor(drmmode->fd, drmmode_crtc->mode_crtc->crtc_id, handle,
+			 ms->cursor_width, ms->cursor_height);
 }
 
 static void
@@ -1485,6 +1493,7 @@ void drmmode_uevent_fini(ScrnInfoPtr scrn, drmmode_ptr drmmode)
 /* create front and cursor BOs */
 Bool drmmode_create_initial_bos(ScrnInfoPtr pScrn, drmmode_ptr drmmode)
 {
+	modesettingPtr ms = modesettingPTR(pScrn);
 	xf86CrtcConfigPtr   xf86_config = XF86_CRTC_CONFIG_PTR(pScrn);
 	int width;
 	int height;
@@ -1500,7 +1509,8 @@ Bool drmmode_create_initial_bos(ScrnInfoPtr pScrn, drmmode_ptr drmmode)
 		return FALSE;
 	pScrn->displayWidth = drmmode->front_bo->pitch / cpp;
 
-	width = height = 64;
+	width = ms->cursor_width;
+	height = ms->cursor_height;
 	bpp = 32;
 	for (i = 0; i < xf86_config->num_crtc; i++) {
 		xf86CrtcPtr crtc = xf86_config->crtc[i];
-- 
1.8.3.1