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authorAndres Salomon <dilinger@queued.net>2008-04-28 02:15:02 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-28 08:58:36 -0700
commit46fb6f110dfc3fc99f44cf701f66ea3e790b6a81 (patch)
treef1fd3abed10ac35bed20670bb47b83c592293d07 /drivers/video/geode/gxfb.h
parentd1b4cc3ec5f8ddbac57ada58cbab36f5a0be38eb (diff)
gxfb: add power management functionality
This adds the ability to suspend/resume the gxfb driver, which includes: - The addition of a Graphics Processor register table in gxfb.h, and associated GP handling. - Register and palette saving code; registers are stored in gxfb_par. A few MSR values are saved as well. - gx_powerup and gx_powerdown functions which restore/save registers and enable/disable graphic engines. - gxfb_suspend/gxfb_resume Originally based on a patch by Jordan Crouse. Signed-off-by: Andres Salomon <dilinger@debian.org> Cc: Jordan Crouse <jordan.crouse@amd.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/geode/gxfb.h')
-rw-r--r--drivers/video/geode/gxfb.h72
1 files changed, 71 insertions, 1 deletions
diff --git a/drivers/video/geode/gxfb.h b/drivers/video/geode/gxfb.h
index b8db7f82646..16a96f8fd8c 100644
--- a/drivers/video/geode/gxfb.h
+++ b/drivers/video/geode/gxfb.h
@@ -13,10 +13,34 @@
#include <linux/io.h>
+#define GP_REG_COUNT (0x50 / 4)
+#define DC_REG_COUNT (0x90 / 4)
+#define VP_REG_COUNT (0x138 / 8)
+#define FP_REG_COUNT (0x68 / 8)
+
+#define DC_PAL_COUNT 0x104
+
struct gxfb_par {
int enable_crt;
void __iomem *dc_regs;
void __iomem *vid_regs;
+ void __iomem *gp_regs;
+#ifdef CONFIG_PM
+ int powered_down;
+
+ /* register state, for power management functionality */
+ struct {
+ uint64_t padsel;
+ uint64_t dotpll;
+ } msr;
+
+ uint32_t gp[GP_REG_COUNT];
+ uint32_t dc[DC_REG_COUNT];
+ uint64_t vp[VP_REG_COUNT];
+ uint64_t fp[FP_REG_COUNT];
+
+ uint32_t pal[DC_PAL_COUNT];
+#endif
};
unsigned int gx_frame_buffer_size(void);
@@ -29,6 +53,43 @@ void gx_set_dclk_frequency(struct fb_info *info);
void gx_configure_display(struct fb_info *info);
int gx_blank_display(struct fb_info *info, int blank_mode);
+#ifdef CONFIG_PM
+int gx_powerdown(struct fb_info *info);
+int gx_powerup(struct fb_info *info);
+#endif
+
+
+/* Graphics Processor registers (table 6-23 from the data book) */
+enum gp_registers {
+ GP_DST_OFFSET = 0,
+ GP_SRC_OFFSET,
+ GP_STRIDE,
+ GP_WID_HEIGHT,
+
+ GP_SRC_COLOR_FG,
+ GP_SRC_COLOR_BG,
+ GP_PAT_COLOR_0,
+ GP_PAT_COLOR_1,
+
+ GP_PAT_COLOR_2,
+ GP_PAT_COLOR_3,
+ GP_PAT_COLOR_4,
+ GP_PAT_COLOR_5,
+
+ GP_PAT_DATA_0,
+ GP_PAT_DATA_1,
+ GP_RASTER_MODE,
+ GP_VECTOR_MODE,
+
+ GP_BLT_MODE,
+ GP_BLT_STATUS,
+ GP_HST_SRC,
+ GP_BASE_OFFSET, /* 0x4c */
+};
+
+#define GP_BLT_STATUS_BLT_PENDING (1 << 2)
+#define GP_BLT_STATUS_BLT_BUSY (1 << 0)
+
/* Display Controller registers (table 6-38 from the data book) */
enum dc_registers {
@@ -238,6 +299,16 @@ enum fp_registers {
/* register access functions */
+static inline uint32_t read_gp(struct gxfb_par *par, int reg)
+{
+ return readl(par->gp_regs + 4*reg);
+}
+
+static inline void write_gp(struct gxfb_par *par, int reg, uint32_t val)
+{
+ writel(val, par->gp_regs + 4*reg);
+}
+
static inline uint32_t read_dc(struct gxfb_par *par, int reg)
{
return readl(par->dc_regs + 4*reg);
@@ -248,7 +319,6 @@ static inline void write_dc(struct gxfb_par *par, int reg, uint32_t val)
writel(val, par->dc_regs + 4*reg);
}
-
static inline uint32_t read_vp(struct gxfb_par *par, int reg)
{
return readl(par->vid_regs + 8*reg);