diff options
| author |   Tomi Valkeinen <tomi.valkeinen@ti.com> | 2011-06-01 15:56:39 +0300 |
|---|---|---|
| committer | Tomi Valkeinen <tomi.valkeinen@ti.com> | 2011-07-25 10:22:07 +0300 |
| commit | 69f06054aad122b314cd64fdafdf14fc3b8e5b7c (patch) | |
| tree | e0ac81c853ca05d9ad822c6dd400a1ef5e5103ec /drivers/video | |
| parent | OMAP: DSS2: DISPC: Fix context save/restore (diff) | |
| download | linux-dev-69f06054aad122b314cd64fdafdf14fc3b8e5b7c.tar.xz linux-dev-69f06054aad122b314cd64fdafdf14fc3b8e5b7c.zip | |
OMAP: DSS2: DSS: Fix context save/restore
The current method of saving and restoring the context could cause a
restore before saving, effectively "restoring" zero values to registers.
Add ctx_valid field to indicate if the saved context is valid and can be
restored.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/omap2/dss/dss.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c index 2424064c9cef..9423a2ee3aac 100644 --- a/drivers/video/omap2/dss/dss.c +++ b/drivers/video/omap2/dss/dss.c @@ -74,6 +74,7 @@ static struct { enum omap_dss_clk_source dispc_clk_source; enum omap_dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS]; + bool ctx_valid; u32 ctx[DSS_SZ_REGS / sizeof(u32)]; } dss; @@ -109,12 +110,19 @@ static void dss_save_context(void) SR(SDI_CONTROL); SR(PLL_CONTROL); } + + dss.ctx_valid = true; + + DSSDBG("context saved\n"); } static void dss_restore_context(void) { DSSDBG("dss_restore_context\n"); + if (!dss.ctx_valid) + return; + RR(CONTROL); if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & @@ -122,6 +130,8 @@ static void dss_restore_context(void) RR(SDI_CONTROL); RR(PLL_CONTROL); } + + DSSDBG("context restored\n"); } #undef SR |