diff options
Diffstat (limited to 'target/linux/s3c24xx/patches-2.6.24/1299-glamo_fb-Implement-screen-blanking.patch')
| -rw-r--r-- | target/linux/s3c24xx/patches-2.6.24/1299-glamo_fb-Implement-screen-blanking.patch | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/target/linux/s3c24xx/patches-2.6.24/1299-glamo_fb-Implement-screen-blanking.patch b/target/linux/s3c24xx/patches-2.6.24/1299-glamo_fb-Implement-screen-blanking.patch deleted file mode 100644 index 3004a83..0000000 --- a/target/linux/s3c24xx/patches-2.6.24/1299-glamo_fb-Implement-screen-blanking.patch +++ /dev/null @@ -1,128 +0,0 @@ -From a2ef813d2f439a3e9f377d33a2e5baad098afb7e Mon Sep 17 00:00:00 2001 -From: Harald Welte <laforge@openmoko.org> -Date: Wed, 8 Oct 2008 21:36:23 +0100 -Subject: [PATCH] glamo_fb: Implement screen blanking - -This patch implements fb_blank() for the glamo-fb driver, which switches off -the pixel clock (DCLK) for power saving. - -We currently delay the actual pixel clock switch until we enter -FB_BLANK_POWERDOWN, since the backlight fade is slow and we don't want the -user to see artefacts on the screen while the backlight is fading out. - -So since the X server first sends FB_BLANK_{V,H}SYNC_SUSPEND, we start the -backlight fade here, and only once we get FB_BLANK_POWERDOWN the pixel clock is -disabled. - -There are no measurements yet, but the power savings should be double, since -there is no longer any generation of the high-frequency LCM signals, and -there are no video-related SDRAM accesses anymore. - -Signed-off-by: Harald Welte <laforge@openmoko.org> ---- - drivers/mfd/glamo/glamo-core.c | 32 ++++++++++++++++++++++++++++++++ - drivers/mfd/glamo/glamo-core.h | 6 ++++++ - drivers/mfd/glamo/glamo-fb.c | 29 ++++++++++++++++++++++++++++- - 3 files changed, 66 insertions(+), 1 deletions(-) - -diff --git a/drivers/mfd/glamo/glamo-core.c b/drivers/mfd/glamo/glamo-core.c -index 2619c5f..58ee3e2 100644 ---- a/drivers/mfd/glamo/glamo-core.c -+++ b/drivers/mfd/glamo/glamo-core.c -@@ -524,6 +524,38 @@ int glamo_engine_disable(struct glamo_core *glamo, enum glamo_engine engine) - } - EXPORT_SYMBOL_GPL(glamo_engine_disable); - -+static const u_int16_t engine_clock_regs[__NUM_GLAMO_ENGINES] = { -+ [GLAMO_ENGINE_LCD] = GLAMO_REG_CLOCK_LCD, -+ [GLAMO_ENGINE_MMC] = GLAMO_REG_CLOCK_MMC, -+ [GLAMO_ENGINE_ISP] = GLAMO_REG_CLOCK_ISP, -+ [GLAMO_ENGINE_JPEG] = GLAMO_REG_CLOCK_JPEG, -+ [GLAMO_ENGINE_3D] = GLAMO_REG_CLOCK_3D, -+ [GLAMO_ENGINE_2D] = GLAMO_REG_CLOCK_2D, -+ [GLAMO_ENGINE_MPEG_ENC] = GLAMO_REG_CLOCK_MPEG, -+ [GLAMO_ENGINE_MPEG_DEC] = GLAMO_REG_CLOCK_MPEG, -+}; -+ -+void glamo_engine_clkreg_set(struct glamo_core *glamo, -+ enum glamo_engine engine, -+ u_int16_t mask, u_int16_t val) -+{ -+ reg_set_bit_mask(glamo, engine_clock_regs[engine], mask, val); -+} -+EXPORT_SYMBOL_GPL(glamo_engine_clkreg_set); -+ -+u_int16_t glamo_engine_clkreg_get(struct glamo_core *glamo, -+ enum glamo_engine engine) -+{ -+ u_int16_t val; -+ -+ spin_lock(&glamo->lock); -+ val = __reg_read(glamo, engine_clock_regs[engine]); -+ spin_unlock(&glamo->lock); -+ -+ return val; -+} -+EXPORT_SYMBOL_GPL(glamo_engine_clkreg_get); -+ - struct glamo_script reset_regs[] = { - [GLAMO_ENGINE_LCD] = { - GLAMO_REG_CLOCK_LCD, GLAMO_CLOCK_LCD_RESET -diff --git a/drivers/mfd/glamo/glamo-core.h b/drivers/mfd/glamo/glamo-core.h -index ac5eacf..fb5f0f6 100644 ---- a/drivers/mfd/glamo/glamo-core.h -+++ b/drivers/mfd/glamo/glamo-core.h -@@ -98,4 +98,10 @@ void glamo_engine_reset(struct glamo_core *glamo, enum glamo_engine engine); - int glamo_engine_reclock(struct glamo_core *glamo, - enum glamo_engine engine, int ps); - -+void glamo_engine_clkreg_set(struct glamo_core *glamo, -+ enum glamo_engine engine, -+ u_int16_t mask, u_int16_t val); -+ -+u_int16_t glamo_engine_clkreg_get(struct glamo_core *glamo, -+ enum glamo_engine engine); - #endif /* __GLAMO_CORE_H */ -diff --git a/drivers/mfd/glamo/glamo-fb.c b/drivers/mfd/glamo/glamo-fb.c -index 8f5d6b1..5cd6e05 100644 ---- a/drivers/mfd/glamo/glamo-fb.c -+++ b/drivers/mfd/glamo/glamo-fb.c -@@ -420,7 +420,34 @@ static int glamofb_set_par(struct fb_info *info) - - static int glamofb_blank(int blank_mode, struct fb_info *info) - { -- /* FIXME */ -+ struct glamofb_handle *gfb = info->par; -+ struct glamo_core *gcore = gfb->mach_info->glamo; -+ -+ dev_dbg(gfb->dev, "glamofb_blank(%u)\n", blank_mode); -+ -+ switch (blank_mode) { -+ case FB_BLANK_VSYNC_SUSPEND: -+ case FB_BLANK_HSYNC_SUSPEND: -+ /* FIXME: add pdata hook/flag to indicate whether -+ * we should already switch off pixel clock here */ -+ break; -+ case FB_BLANK_POWERDOWN: -+ /* disable the pixel clock */ -+ glamo_engine_clkreg_set(gcore, GLAMO_ENGINE_LCD, -+ GLAMO_CLOCK_LCD_EN_DCLK, 0); -+ break; -+ case FB_BLANK_UNBLANK: -+ case FB_BLANK_NORMAL: -+ /* enable the pixel clock */ -+ glamo_engine_clkreg_set(gcore, GLAMO_ENGINE_LCD, -+ GLAMO_CLOCK_LCD_EN_DCLK, -+ GLAMO_CLOCK_LCD_EN_DCLK); -+ break; -+ } -+ -+ /* FIXME: once we have proper clock management in glamo-core, -+ * we can determine if other units need MCLK1 or the PLL, and -+ * disable it if not used. */ - return 0; - } - --- -1.5.6.5 - |