From 57499d136e351ccd8143d02c6a1f6261b1775a69 Mon Sep 17 00:00:00 2001 From: Elise Lennion Date: Wed, 26 Oct 2016 00:03:43 -0200 Subject: [PATCH] staging: sm750fb: Refine the code and remove unused code. Every call to the function waitNextVerticalSync() used the macro primaryWaitVerticalSync(), so the macro was removed and the function waitNextVerticalSync() renamed to primary_wait_vertical_sync(). With this change, an unnecessary 'if' statement was removed together with the lines within the 'else' statement, because it was never satisfied. The modified function was refined to better match the Kernel coding style. Signed-off-by: Elise Lennion Reviewed-by: Dan Carpenter Signed-off-by: Greg Kroah-Hartman --- drivers/staging/sm750fb/ddk750_display.c | 71 +++++++----------------- 1 file changed, 21 insertions(+), 50 deletions(-) diff --git a/drivers/staging/sm750fb/ddk750_display.c b/drivers/staging/sm750fb/ddk750_display.c index aea97361d937..0f3a875b0ef8 100644 --- a/drivers/staging/sm750fb/ddk750_display.c +++ b/drivers/staging/sm750fb/ddk750_display.c @@ -4,8 +4,6 @@ #include "ddk750_power.h" #include "ddk750_dvi.h" -#define primaryWaitVerticalSync(delay) waitNextVerticalSync(0, delay) - static void setDisplayControl(int ctrl, int disp_state) { /* state != 0 means turn on both timing & plane en_bit */ @@ -61,55 +59,28 @@ static void setDisplayControl(int ctrl, int disp_state) } } -static void waitNextVerticalSync(int ctrl, int delay) +static void primary_wait_vertical_sync(int delay) { unsigned int status; - if (!ctrl) { - /* primary controller */ + /* + * Do not wait when the Primary PLL is off or display control is + * already off. This will prevent the software to wait forever. + */ + if (!(PEEK32(PANEL_PLL_CTRL) & PLL_CTRL_POWER) || + !(PEEK32(PANEL_DISPLAY_CTRL) & DISPLAY_CTRL_TIMING)) + return; - /* - * Do not wait when the Primary PLL is off or display control is - * already off. This will prevent the software to wait forever. - */ - if (!(PEEK32(PANEL_PLL_CTRL) & PLL_CTRL_POWER) || - !(PEEK32(PANEL_DISPLAY_CTRL) & DISPLAY_CTRL_TIMING)) { - return; - } + while (delay-- > 0) { + /* Wait for end of vsync. */ + do { + status = PEEK32(SYSTEM_CTRL); + } while (status & SYSTEM_CTRL_PANEL_VSYNC_ACTIVE); - while (delay-- > 0) { - /* Wait for end of vsync. */ - do { - status = PEEK32(SYSTEM_CTRL); - } while (status & SYSTEM_CTRL_PANEL_VSYNC_ACTIVE); - - /* Wait for start of vsync. */ - do { - status = PEEK32(SYSTEM_CTRL); - } while (!(status & SYSTEM_CTRL_PANEL_VSYNC_ACTIVE)); - } - - } else { - /* - * Do not wait when the Primary PLL is off or display control is - * already off. This will prevent the software to wait forever. - */ - if (!(PEEK32(CRT_PLL_CTRL) & PLL_CTRL_POWER) || - !(PEEK32(CRT_DISPLAY_CTRL) & DISPLAY_CTRL_TIMING)) { - return; - } - - while (delay-- > 0) { - /* Wait for end of vsync. */ - do { - status = PEEK32(SYSTEM_CTRL); - } while (status & SYSTEM_CTRL_PANEL_VSYNC_ACTIVE); - - /* Wait for start of vsync. */ - do { - status = PEEK32(SYSTEM_CTRL); - } while (!(status & SYSTEM_CTRL_PANEL_VSYNC_ACTIVE)); - } + /* Wait for start of vsync. */ + do { + status = PEEK32(SYSTEM_CTRL); + } while (!(status & SYSTEM_CTRL_PANEL_VSYNC_ACTIVE)); } } @@ -121,22 +92,22 @@ static void swPanelPowerSequence(int disp, int delay) reg = PEEK32(PANEL_DISPLAY_CTRL); reg |= (disp ? PANEL_DISPLAY_CTRL_FPEN : 0); POKE32(PANEL_DISPLAY_CTRL, reg); - primaryWaitVerticalSync(delay); + primary_wait_vertical_sync(delay); reg = PEEK32(PANEL_DISPLAY_CTRL); reg |= (disp ? PANEL_DISPLAY_CTRL_DATA : 0); POKE32(PANEL_DISPLAY_CTRL, reg); - primaryWaitVerticalSync(delay); + primary_wait_vertical_sync(delay); reg = PEEK32(PANEL_DISPLAY_CTRL); reg |= (disp ? PANEL_DISPLAY_CTRL_VBIASEN : 0); POKE32(PANEL_DISPLAY_CTRL, reg); - primaryWaitVerticalSync(delay); + primary_wait_vertical_sync(delay); reg = PEEK32(PANEL_DISPLAY_CTRL); reg |= (disp ? PANEL_DISPLAY_CTRL_FPEN : 0); POKE32(PANEL_DISPLAY_CTRL, reg); - primaryWaitVerticalSync(delay); + primary_wait_vertical_sync(delay); } void ddk750_setLogicalDispOut(disp_output_t output)