115 lines
3.7 KiB
Diff
115 lines
3.7 KiB
Diff
From e664a91ea54b3488d6c08dd82dac2af1239c3275 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 2 Dec 2021 18:21:46 +0000
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Subject: [PATCH] drm/vc4: dpi: Add option for inverting pixel clock
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and output enable
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DRM provides flags for inverting pixel clock and output enable
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signals, but these were not mapped to the relevant registers.
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Add those mappings.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/gpu/drm/vc4/vc4_dpi.c | 89 ++++++++++++++++++++---------------
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1 file changed, 51 insertions(+), 38 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_dpi.c
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+++ b/drivers/gpu/drm/vc4/vc4_dpi.c
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@@ -148,45 +148,58 @@ static void vc4_dpi_encoder_enable(struc
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}
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drm_connector_list_iter_end(&conn_iter);
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- if (connector && connector->display_info.num_bus_formats) {
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- u32 bus_format = connector->display_info.bus_formats[0];
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+ if (connector) {
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+ if (connector->display_info.num_bus_formats) {
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+ u32 bus_format = connector->display_info.bus_formats[0];
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- switch (bus_format) {
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- case MEDIA_BUS_FMT_RGB888_1X24:
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- dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB,
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- DPI_FORMAT);
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- break;
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- case MEDIA_BUS_FMT_BGR888_1X24:
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- dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB,
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- DPI_FORMAT);
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- dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR, DPI_ORDER);
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- break;
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- case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
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- dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_2,
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- DPI_FORMAT);
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- break;
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- case MEDIA_BUS_FMT_BGR666_1X24_CPADHI:
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- dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_2,
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- DPI_FORMAT);
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- dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR, DPI_ORDER);
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- break;
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- case MEDIA_BUS_FMT_RGB666_1X18:
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- dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1,
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- DPI_FORMAT);
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- break;
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- case MEDIA_BUS_FMT_BGR666_1X18:
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- dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1,
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- DPI_FORMAT);
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- dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR, DPI_ORDER);
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- break;
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- case MEDIA_BUS_FMT_RGB565_1X16:
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- dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_3,
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- DPI_FORMAT);
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- break;
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- default:
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- DRM_ERROR("Unknown media bus format %d\n", bus_format);
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- break;
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+ switch (bus_format) {
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+ case MEDIA_BUS_FMT_RGB888_1X24:
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+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB,
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+ DPI_FORMAT);
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+ break;
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+ case MEDIA_BUS_FMT_BGR888_1X24:
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+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_24BIT_888_RGB,
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+ DPI_FORMAT);
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+ dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR,
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+ DPI_ORDER);
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+ break;
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+ case MEDIA_BUS_FMT_RGB666_1X24_CPADHI:
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+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_2,
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+ DPI_FORMAT);
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+ break;
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+ case MEDIA_BUS_FMT_BGR666_1X24_CPADHI:
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+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_2,
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+ DPI_FORMAT);
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+ dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR,
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+ DPI_ORDER);
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+ break;
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+ case MEDIA_BUS_FMT_RGB666_1X18:
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+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1,
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+ DPI_FORMAT);
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+ break;
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+ case MEDIA_BUS_FMT_BGR666_1X18:
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+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1,
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+ DPI_FORMAT);
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+ dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR,
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+ DPI_ORDER);
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+ break;
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+ case MEDIA_BUS_FMT_RGB565_1X16:
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+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_3,
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+ DPI_FORMAT);
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+ break;
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+ default:
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+ DRM_ERROR("Unknown media bus format %d\n",
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+ bus_format);
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+ break;
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+ }
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}
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+
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+ if (connector->display_info.bus_flags &
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+ DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
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+ dpi_c |= DPI_PIXEL_CLK_INVERT;
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+
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+ if (connector->display_info.bus_flags & DRM_BUS_FLAG_DE_LOW)
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+ dpi_c |= DPI_OUTPUT_ENABLE_INVERT;
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} else {
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/* Default to 18bit if no connector found. */
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dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1, DPI_FORMAT);
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