diff options
Diffstat (limited to 'packages/linux/linux-omap/mru-improve-pixclock-config.diff')
| -rw-r--r-- | packages/linux/linux-omap/mru-improve-pixclock-config.diff | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/packages/linux/linux-omap/mru-improve-pixclock-config.diff b/packages/linux/linux-omap/mru-improve-pixclock-config.diff deleted file mode 100644 index 5a702128f2..0000000000 --- a/packages/linux/linux-omap/mru-improve-pixclock-config.diff +++ /dev/null @@ -1,93 +0,0 @@ -From: Mans Rullgard <mans@mansr.com> -Date: Fri, 29 Aug 2008 01:34:39 +0000 (+0100) -Subject: OMAP: Improve pixel clock configuration -X-Git-Url: http://git.mansr.com/?p=linux-omap;a=commitdiff_plain;h=01c2d720e59c291de9eb21eb65225f2f215fef84 - -OMAP: Improve pixel clock configuration - -This sets the DSS1_ALWON_FCLK clock as close as possible to a -multiple of the requested pixel clock, while keeping it below -the 173MHz limit. - -Due to of the structure of the clock tree, dss1_alwon_fck cannot -be set directly, and we must use dpll4_m4_ck instead. - -Signed-off-by: Mans Rullgard <mans@mansr.com> ---- - -diff --git a/drivers/video/omap/dispc.c b/drivers/video/omap/dispc.c -index 64bf333..888d2c2 100644 ---- a/drivers/video/omap/dispc.c -+++ b/drivers/video/omap/dispc.c -@@ -177,6 +177,7 @@ static struct { - - struct clk *dss_ick, *dss1_fck; - struct clk *dss_54m_fck; -+ struct clk *dpll4_m4_ck; - - enum omapfb_update_mode update_mode; - struct omapfb_device *fbdev; -@@ -736,19 +737,34 @@ static void setup_color_conv_coef(void) - MOD_REG_FLD(at2_reg, (1 << 11), ct->full_range); - } - -+#define MAX_FCK 173000000 -+ - static void calc_ck_div(int is_tft, int pck, int *lck_div, int *pck_div) - { -+ unsigned long prate = clk_get_rate(clk_get_parent(dispc.dpll4_m4_ck)); -+ unsigned long pcd_min = is_tft? 2: 3; -+ unsigned long fck_div; - unsigned long fck, lck; - -- *lck_div = 1; - pck = max(1, pck); -+ -+ if (pck * pcd_min > MAX_FCK) { -+ dev_warn(dispc.fbdev->dev, "pixclock %d kHz too high.\n", -+ pck / 1000); -+ pck = MAX_FCK / pcd_min; -+ } -+ -+ fck = pck * 2; -+ fck_div = (prate + pck) / fck; -+ if (fck_div > 16) -+ fck_div /= (fck_div + 15) / 16; -+ if (fck_div < 1) -+ fck_div = 1; -+ clk_set_rate(dispc.dpll4_m4_ck, prate / fck_div); - fck = clk_get_rate(dispc.dss1_fck); -- lck = fck; -- *pck_div = (lck + pck - 1) / pck; -- if (is_tft) -- *pck_div = max(2, *pck_div); -- else -- *pck_div = max(3, *pck_div); -+ -+ *lck_div = 1; -+ *pck_div = (fck + pck - 1) / pck; - if (*pck_div > 255) { - *pck_div = 255; - lck = pck * *pck_div; -@@ -909,11 +925,21 @@ static int get_dss_clocks(void) - return PTR_ERR(dispc.dss_54m_fck); - } - -+ if (IS_ERR((dispc.dpll4_m4_ck = -+ clk_get(dispc.fbdev->dev, "dpll4_m4_ck")))) { -+ dev_err(dispc.fbdev->dev, "can't get dpll4_m4_ck"); -+ clk_put(dispc.dss_ick); -+ clk_put(dispc.dss1_fck); -+ clk_put(dispc.dss_54m_fck); -+ return PTR_ERR(dispc.dss_54m_fck); -+ } -+ - return 0; - } - - static void put_dss_clocks(void) - { -+ clk_put(dispc.dpll4_m4_ck); - clk_put(dispc.dss_54m_fck); - clk_put(dispc.dss1_fck); - clk_put(dispc.dss_ick); |