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Commit cb11b3f1 authored by Gustavo Padovan's avatar Gustavo Padovan Committed by Inki Dae
Browse files

drm/exynos: fimd: only finish update if START == START_S 



fimd_update_plane() programs BUF_START[win] and during the update
BUF_START[win] is copied to BUF_START_S[win] (its shadow register)
and starts scanning out, then it raises a irq.

The fimd_irq_handler, in the case we have a pending_fb, will check
the fb value was copied to START_S register and finish the update
in case of success.

Based on patch from Daniel Kurtz <djkurtz@chromium.org>

Signed-off-by: default avatarGustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent 44205083

drivers/gpu/drm/exynos/exynos_drm_fimd.c

+6 −2
Original line number Diff line number Diff line
@@ -59,6 +59,7 @@ 
#define VIDWnALPHA1(win)	(VIDW_ALPHA + 0x04 + (win) * 8)



#define VIDWx_BUF_START(win, buf)	(VIDW_BUF_START(buf) + (win) * 8)

#define VIDWx_BUF_START_S(win, buf)	(VIDW_BUF_START_S(buf) + (win) * 8)

#define VIDWx_BUF_END(win, buf)		(VIDW_BUF_END(buf) + (win) * 8)

#define VIDWx_BUF_SIZE(win, buf)	(VIDW_BUF_SIZE(buf) + (win) * 4)
@@ -895,7 +896,7 @@ static const struct exynos_drm_crtc_ops fimd_crtc_ops = { 
static irqreturn_t fimd_irq_handler(int irq, void *dev_id)

{

	struct fimd_context *ctx = (struct fimd_context *)dev_id;

	u32 val, clear_bit;

	u32 val, clear_bit, start, start_s;

	int win;



	val = readl(ctx->regs + VIDINTCON1);
@@ -917,6 +918,9 @@ static irqreturn_t fimd_irq_handler(int irq, void *dev_id) 
		if (!plane->pending_fb)

			continue;



		start = readl(ctx->regs + VIDWx_BUF_START(win, 0));

		start_s = readl(ctx->regs + VIDWx_BUF_START_S(win, 0));

		if (start == start_s)

			exynos_drm_crtc_finish_update(ctx->crtc, plane);

	}