[media] s5p-fimc: fix MSCTRL.FIFO_CTRL for performance enhancement

This patch fixes the value of FIFO_CTRL in MSCTRL. Main-scaler has the value to specify a basis FIFO control of input DMA. The description of FIFO_CTRL has been changed as below. 0 = FIFO Empty (Next burst transaction is possible when FIFO is empty) 1 = FIFO Full (Next burst transaction is possible except Full FIFO) Value '1' is recommended to enhance the FIMC operation performance. Reviewed-by: Jonghun Han <jonghun.han@samsung.com> Signed-off-by: Hyunwoong Kim <khw0178.kim@samsung.com> Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
git-mirror · Mar 21, 2011 · 5bbe425 · 5bbe425
1 parent 65777e5
commit 5bbe425
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diff --git a/drivers/media/video/s5p-fimc/fimc-reg.c b/drivers/media/video/s5p-fimc/fimc-reg.c
@@ -437,7 +437,9 @@ void fimc_hw_set_in_dma(struct fimc_ctx *ctx)
 		| S5P_MSCTRL_C_INT_IN_MASK
 		| S5P_MSCTRL_2P_IN_ORDER_MASK);
 
-	cfg |= S5P_MSCTRL_IN_BURST_COUNT(4) | S5P_MSCTRL_INPUT_MEMORY;
+	cfg |= (S5P_MSCTRL_IN_BURST_COUNT(4)
+		| S5P_MSCTRL_INPUT_MEMORY
+		| S5P_MSCTRL_FIFO_CTRL_FULL);
 
 	switch (frame->fmt->color) {
 	case S5P_FIMC_RGB565...S5P_FIMC_RGB888:

diff --git a/drivers/media/video/s5p-fimc/regs-fimc.h b/drivers/media/video/s5p-fimc/regs-fimc.h
@@ -226,6 +226,7 @@
 #define S5P_MSCTRL_FLIP_X_MIRROR	(1 << 13)
 #define S5P_MSCTRL_FLIP_Y_MIRROR	(2 << 13)
 #define S5P_MSCTRL_FLIP_180		(3 << 13)
+#define S5P_MSCTRL_FIFO_CTRL_FULL	(1 << 12)
 #define S5P_MSCTRL_ORDER422_SHIFT	4
 #define S5P_MSCTRL_ORDER422_YCBYCR	(0 << 4)
 #define S5P_MSCTRL_ORDER422_CBYCRY	(1 << 4)