staging: drm/imx: ipu-di: add comments explaining signal generator configuration
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -413,9 +413,11 @@ static void ipu_di_sync_config_noninterlaced(struct ipu_di *di,
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sig->v_end_width;
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struct di_sync_config cfg[] = {
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{
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/* 1: INT_HSYNC */
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.run_count = h_total - 1,
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.run_src = DI_SYNC_CLK,
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} , {
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/* PIN2: HSYNC */
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.run_count = h_total - 1,
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.run_src = DI_SYNC_CLK,
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.offset_count = div * sig->v_to_h_sync,
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@ -424,23 +426,28 @@ static void ipu_di_sync_config_noninterlaced(struct ipu_di *di,
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.cnt_polarity_trigger_src = DI_SYNC_CLK,
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.cnt_down = sig->h_sync_width * 2,
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} , {
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/* PIN3: VSYNC */
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.run_count = v_total - 1,
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.run_src = DI_SYNC_INT_HSYNC,
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.cnt_polarity_gen_en = 1,
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.cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
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.cnt_down = sig->v_sync_width * 2,
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} , {
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/* 4: Line Active */
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.run_src = DI_SYNC_HSYNC,
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.offset_count = sig->v_sync_width + sig->v_start_width,
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.offset_src = DI_SYNC_HSYNC,
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.repeat_count = sig->height,
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.cnt_clr_src = DI_SYNC_VSYNC,
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} , {
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/* 5: DE, referenced by DC */
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.run_src = DI_SYNC_CLK,
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.offset_count = sig->h_sync_width + sig->h_start_width,
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.offset_src = DI_SYNC_CLK,
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.repeat_count = sig->width,
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.cnt_clr_src = 5,
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.cnt_clr_src = 5, /* Line Active */
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} , {
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/* unused */
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} , {
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/* unused */
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} , {
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