video_common: edid: Added function headers for documentation.
Signed-off-by: Andrei-Liviu Simion <andrei.simion@xilinx.com>
This commit is contained in:
Andrei-Liviu Simion
Nava kishore Manne
parent
4d686c08e0
commit
9beb00b9b9
1 changed files with 229 additions and 2 deletions
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@ -67,6 +67,21 @@ static float XVidC_CalculateBinaryFraction(u16 Val, u8 DecPtIndex);
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/**************************** Function Definitions ****************************/
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/******************************************************************************/
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/**
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* Get the manufacturer name as specified in the supplied base Extended Display
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* Identification Data (EDID).
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*
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* @param EdidRaw is the supplied base EDID to retrieve the manufacturer
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* name from.
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* @param ManName is the string that will be modified to hold the
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* retrieved manufacturer name.
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*
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* @return None.
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*
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* @note The ManName argument is modified with the manufacturer name.
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*
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*******************************************************************************/
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void XVidC_EdidGetVpiIdManName(u8 *EdidRaw, char ManName[4])
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{
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ManName[0] = 0x40 + ((EdidRaw[XVIDC_EDID_VPI_ID_MAN_NAME0] &
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@ -82,6 +97,20 @@ void XVidC_EdidGetVpiIdManName(u8 *EdidRaw, char ManName[4])
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ManName[3] = '\0';
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}
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/******************************************************************************/
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/**
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* Get the color bit depth (bits per primary color) as specified in the supplied
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* base Extended Display Identification Data (EDID).
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*
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* @param EdidRaw is the supplied base EDID to retrieve color depth
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* information from.
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*
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* @return The number of bits per primary color as specified by the
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* supplied base EDID.
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*
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* @note None.
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*
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*******************************************************************************/
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u8 XVidC_EdidGetBDispVidDigBpc(u8 *EdidRaw)
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{
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u8 Bpc;
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@ -121,6 +150,20 @@ u8 XVidC_EdidGetBDispVidDigBpc(u8 *EdidRaw)
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return Bpc;
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}
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/******************************************************************************/
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/**
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* Calculates the x chromaticity coordinate for red by converting a 10 bit
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* binary fraction representation from the supplied base Extended Display
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* Identification Data (EDID) to a float.
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*
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* @param EdidRaw is the supplied base EDID to retrieve chromaticity
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* information from.
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*
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* @return The x chromatacity coordinate for red.
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*
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* @note All values will be accurate to +/-0.0005.
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*
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*******************************************************************************/
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float XVidC_EdidGetCcRedX(u8 *EdidRaw)
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{
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return XVidC_CalculateBinaryFraction(
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@ -129,6 +172,20 @@ float XVidC_EdidGetCcRedX(u8 *EdidRaw)
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XVIDC_EDID_CC_RBX_LOW_SHIFT), 9);
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}
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/******************************************************************************/
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/**
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* Calculates the y chromaticity coordinate for red by converting a 10 bit
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* binary fraction representation from the supplied base Extended Display
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* Identification Data (EDID) to a float.
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*
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* @param EdidRaw is the supplied base EDID to retrieve chromaticity
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* information from.
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*
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* @return The y chromatacity coordinate for red.
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*
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* @note All values will be accurate to +/-0.0005.
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*
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*******************************************************************************/
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float XVidC_EdidGetCcRedY(u8 *EdidRaw)
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{
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return XVidC_CalculateBinaryFraction(
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@ -138,6 +195,20 @@ float XVidC_EdidGetCcRedY(u8 *EdidRaw)
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XVIDC_EDID_CC_RBY_LOW_SHIFT), 9);
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}
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/******************************************************************************/
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/**
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* Calculates the x chromaticity coordinate for green by converting a 10 bit
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* binary fraction representation from the supplied base Extended Display
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* Identification Data (EDID) to a float.
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*
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* @param EdidRaw is the supplied base EDID to retrieve chromaticity
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* information from.
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*
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* @return The x chromatacity coordinate for green.
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*
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* @note All values will be accurate to +/-0.0005.
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*
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*******************************************************************************/
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float XVidC_EdidGetCcGreenX(u8 *EdidRaw)
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{
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return XVidC_CalculateBinaryFraction(
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@ -147,6 +218,20 @@ float XVidC_EdidGetCcGreenX(u8 *EdidRaw)
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XVIDC_EDID_CC_GWX_LOW_SHIFT), 9);
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}
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/******************************************************************************/
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/**
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* Calculates the y chromaticity coordinate for green by converting a 10 bit
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* binary fraction representation from the supplied base Extended Display
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* Identification Data (EDID) to a float.
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*
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* @param EdidRaw is the supplied base EDID to retrieve chromaticity
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* information from.
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*
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* @return The y chromatacity coordinate for green.
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*
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* @note All values will be accurate to +/-0.0005.
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*
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*******************************************************************************/
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float XVidC_EdidGetCcGreenY(u8 *EdidRaw)
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{
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return XVidC_CalculateBinaryFraction(
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@ -155,6 +240,20 @@ float XVidC_EdidGetCcGreenY(u8 *EdidRaw)
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XVIDC_EDID_CC_GWY_LOW_MASK), 9);
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}
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/******************************************************************************/
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/**
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* Calculates the x chromaticity coordinate for blue by converting a 10 bit
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* binary fraction representation from the supplied base Extended Display
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* Identification Data (EDID) to a float.
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*
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* @param EdidRaw is the supplied base EDID to retrieve chromaticity
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* information from.
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*
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* @return The x chromatacity coordinate for blue.
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*
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* @note All values will be accurate to +/-0.0005.
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*
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*******************************************************************************/
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float XVidC_EdidGetCcBlueX(u8 *EdidRaw)
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{
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return XVidC_CalculateBinaryFraction(
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@ -163,6 +262,20 @@ float XVidC_EdidGetCcBlueX(u8 *EdidRaw)
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XVIDC_EDID_CC_RBX_LOW_SHIFT), 9);
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}
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/******************************************************************************/
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/**
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* Calculates the y chromaticity coordinate for blue by converting a 10 bit
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* binary fraction representation from the supplied base Extended Display
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* Identification Data (EDID) to a float.
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*
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* @param EdidRaw is the supplied base EDID to retrieve chromaticity
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* information from.
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*
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* @return The y chromatacity coordinate for blue.
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*
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* @note All values will be accurate to +/-0.0005.
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*
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*******************************************************************************/
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float XVidC_EdidGetCcBlueY(u8 *EdidRaw)
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{
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return XVidC_CalculateBinaryFraction(
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@ -171,6 +284,20 @@ float XVidC_EdidGetCcBlueY(u8 *EdidRaw)
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XVIDC_EDID_CC_RBY_LOW_MASK) >> XVIDC_EDID_CC_RBY_LOW_SHIFT), 9);
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}
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/******************************************************************************/
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/**
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* Calculates the x chromaticity coordinate for white by converting a 10 bit
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* binary fraction representation from the supplied base Extended Display
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* Identification Data (EDID) to a float.
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*
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* @param EdidRaw is the supplied base EDID to retrieve chromaticity
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* information from.
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*
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* @return The x chromatacity coordinate for white.
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*
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* @note All values will be accurate to +/-0.0005.
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*
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*******************************************************************************/
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float XVidC_EdidGetCcWhiteX(u8 *EdidRaw)
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{
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return XVidC_CalculateBinaryFraction(
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@ -179,6 +306,20 @@ float XVidC_EdidGetCcWhiteX(u8 *EdidRaw)
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XVIDC_EDID_CC_GWX_LOW_MASK) >> XVIDC_EDID_CC_GWX_LOW_SHIFT), 9);
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}
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/******************************************************************************/
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/**
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* Calculates the y chromaticity coordinate for white by converting a 10 bit
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* binary fraction representation from the supplied base Extended Display
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* Identification Data (EDID) to a float.
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*
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* @param EdidRaw is the supplied base EDID to retrieve chromaticity
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* information from.
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*
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* @return The y chromatacity coordinate for white.
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*
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* @note All values will be accurate to +/-0.0005.
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*
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*******************************************************************************/
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float XVidC_EdidGetCcWhiteY(u8 *EdidRaw)
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{
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return XVidC_CalculateBinaryFraction(
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@ -187,6 +328,21 @@ float XVidC_EdidGetCcWhiteY(u8 *EdidRaw)
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XVIDC_EDID_CC_GWY_LOW_MASK), 9);
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}
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/******************************************************************************/
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/**
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* Retrieves the active vertical resolution from the standard timings field of
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* the supplied base Extended Display Identification Data (EDID).
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*
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* @param EdidRaw is the supplied base EDID to check the timing against.
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* @param StdTimingsNum specifies which one of the standard timings to
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* retrieve from the standard timings field.
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*
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* @return The vertical active resolution of the specified standard timing
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* from the supplied base EDID.
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*
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* @note StdTimingsNum is an index 1-8.
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*
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*******************************************************************************/
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u16 XVidC_EdidGetStdTimingsV(u8 *EdidRaw, u8 StdTimingsNum)
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{
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u16 V;
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@ -207,15 +363,36 @@ u16 XVidC_EdidGetStdTimingsV(u8 *EdidRaw, u8 StdTimingsNum)
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StdTimingsNum)) / 5;
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break;
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default:
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case XVIDC_EDID_STD_TIMINGS_AR_16_9:
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V = (9 * XVidC_EdidGetStdTimingsH(EdidRaw,
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StdTimingsNum)) / 16;
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break;
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default:
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V = 0;
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break;
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}
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return V;
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}
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/******************************************************************************/
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/**
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* Checks whether or not a specified video timing mode is supported as specified
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* in the supplied base Extended Display Identification Data (EDID). The
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* preferred timing, established timings (I, II, II), and the standard timings
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* fields are checked for support.
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*
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* @param EdidRaw is the supplied base EDID to check the timing against.
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* @param VtMode is the video timing mode to check for support.
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*
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* @return
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* - XST_SUCCESS if the video timing mode is supported as specified
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* in the supplied base EDID.
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* - XST_FAILURE otherwise.
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*
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* @note None.
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*
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*******************************************************************************/
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u32 XVidC_EdidIsVideoTimingSupported(u8 *EdidRaw, XVidC_VideoTimingMode *VtMode)
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{
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u32 Status;
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@ -241,6 +418,22 @@ u32 XVidC_EdidIsVideoTimingSupported(u8 *EdidRaw, XVidC_VideoTimingMode *VtMode)
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return Status;
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}
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/******************************************************************************/
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/**
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* Checks whether or not a specified video timing mode is the preferred timing
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* of the supplied base Extended Display Identification Data (EDID).
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*
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* @param EdidRaw is the supplied base EDID to check the timing against.
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* @param VtMode is the video timing mode to check for support.
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*
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* @return
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* - XST_SUCCESS if the video timing mode is the preferred timing
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* as specified in the base EDID.
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* - XST_FAILURE otherwise.
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*
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* @note None.
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*
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*******************************************************************************/
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static u32 XVidC_EdidIsVideoTimingSupportedPreferredTiming(u8 *EdidRaw,
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XVidC_VideoTimingMode *VtMode)
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{
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@ -271,12 +464,29 @@ static u32 XVidC_EdidIsVideoTimingSupportedPreferredTiming(u8 *EdidRaw,
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return XST_FAILURE;
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}
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/******************************************************************************/
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/**
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* Checks whether or not a specified video timing mode is supported in the
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* established timings field of the supplied base Extended Display
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* Identification Data (EDID).
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*
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* @param EdidRaw is the supplied base EDID to check the timing against.
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* @param VtMode is the video timing mode to check for support.
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*
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* @return
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* - XST_SUCCESS if the video timing mode is supported in the
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* base EDID's established timings field.
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* - XST_FAILURE otherwise.
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*
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* @note None.
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*
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*******************************************************************************/
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static u32 XVidC_EdidIsVideoTimingSupportedEstablishedTimings(u8 *EdidRaw,
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XVidC_VideoTimingMode *VtMode)
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{
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u32 Status = XST_FAILURE;
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/* First, check established timings I, II, and III. */
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/* Check established timings I, II, and III. */
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if ((VtMode->Timing.HActive == 800) &&
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(VtMode->Timing.VActive == 640) &&
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(VtMode->FrameRate == XVIDC_FR_56HZ) &&
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@ -383,6 +593,23 @@ static u32 XVidC_EdidIsVideoTimingSupportedEstablishedTimings(u8 *EdidRaw,
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return Status;
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}
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/******************************************************************************/
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/**
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* Checks whether or not a specified video timing mode is supported in the
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* standard timings field of the supplied base Extended Display Identification
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* Data (EDID).
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*
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* @param EdidRaw is the supplied base EDID to check the timing against.
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* @param VtMode is the video timing mode to check for support.
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*
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* @return
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* - XST_SUCCESS if the video timing mode is supported in the
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* base EDID's standard timings fields.
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* - XST_FAILURE otherwise.
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*
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* @note None.
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*
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*******************************************************************************/
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static u32 XVidC_EdidIsVideoTimingSupportedStandardTimings(u8 *EdidRaw,
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XVidC_VideoTimingMode *VtMode)
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{
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