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authorPawel Osciak <p.osciak@samsung.com>2010-08-10 18:02:38 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 08:59:10 -0700
commit067b226b9e8e20463e0937344c93101ac8d8d2b1 (patch)
tree518d26953ac86514594307976e5a670212c52c6e /arch/arm
parenteb42b0441bc7fd29066bb7c38ebabe3d0e3ff202 (diff)
s3c-fb: add support for display panning
Supports all bpp modes. The PRTCON register is used to disable in-hardware updates of registers that store start and end addresses of framebuffer memory. This prevents display corruption in case we do not make it before VSYNC with updating them atomically. With this feature there is no need to wait for a VSYNC interrupt before each such update. Signed-off-by: Pawel Osciak <p.osciak@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Cc: InKi Dae <inki.dae@samsung.com> Cc: Ben Dooks <ben-linux@fluff.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm')
-rw-r--r--arch/arm/plat-samsung/include/plat/regs-fb.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/plat-samsung/include/plat/regs-fb.h b/arch/arm/plat-samsung/include/plat/regs-fb.h
index ac10013959bd..dbb6c0afef47 100644
--- a/arch/arm/plat-samsung/include/plat/regs-fb.h
+++ b/arch/arm/plat-samsung/include/plat/regs-fb.h
@@ -112,6 +112,13 @@
#define VIDCON2_ORGYCbCr (1 << 8)
#define VIDCON2_YUVORDCrCb (1 << 7)
+/* PRTCON (S3C6410, S5PC100)
+ * Might not be present in the S3C6410 documentation,
+ * but tests prove it's there almost for sure; shouldn't hurt in any case.
+ */
+#define PRTCON (0x0c)
+#define PRTCON_PROTECT (1 << 11)
+
/* VIDTCON0 */
#define VIDTCON0_VBPDE_MASK (0xff << 24)