From: Max Krummenacher max.krummenacher@toradex.com
Evaluate the device tree bus-format property to set bus_format for a 'panel-dpi' panel. Additionally infer the bpc value from the given bus-format.
Valid values for bus-format are found in: <include/dt-bindings/display/dt-media-bus-format.h>
This completes the addition of panel-dpi to completely specify a panel-simple panel from the device tree.
Signed-off-by: Max Krummenacher max.krummenacher@toradex.com
---
drivers/gpu/drm/panel/panel-simple.c | 43 ++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-simple.c b/drivers/gpu/drm/panel/panel-simple.c index a34f4198a534..090c60abb014 100644 --- a/drivers/gpu/drm/panel/panel-simple.c +++ b/drivers/gpu/drm/panel/panel-simple.c @@ -21,6 +21,7 @@ * DEALINGS IN THE SOFTWARE. */
+#include <dt-bindings/display/dt-media-bus-format.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> #include <linux/module.h> @@ -453,6 +454,7 @@ static int panel_dpi_probe(struct device *dev, struct panel_desc *desc; unsigned int bus_flags; struct videomode vm; + u32 bus_format; int ret;
np = dev->of_node; @@ -477,6 +479,47 @@ static int panel_dpi_probe(struct device *dev, of_property_read_u32(np, "width-mm", &desc->size.width); of_property_read_u32(np, "height-mm", &desc->size.height);
+ if (!of_property_read_u32(np, "bus-format", &bus_format)) { + /* infer bpc from bus-format */ + switch (bus_format) { + case DT_MEDIA_BUS_FMT_RGB565_1X16: + desc->bus_format = MEDIA_BUS_FMT_RGB565_1X16; + desc->bpc = 6; + break; + case DT_MEDIA_BUS_FMT_RGB666_1X18: + desc->bus_format = MEDIA_BUS_FMT_RGB666_1X18; + desc->bpc = 6; + break; + case DT_MEDIA_BUS_FMT_RGB666_1X24_CPADHI: + desc->bus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI; + desc->bpc = 6; + break; + case DT_MEDIA_BUS_FMT_BGR888_1X24: + desc->bus_format = MEDIA_BUS_FMT_BGR888_1X24; + desc->bpc = 8; + break; + case DT_MEDIA_BUS_FMT_GBR888_1X24: + desc->bus_format = MEDIA_BUS_FMT_GBR888_1X24; + desc->bpc = 8; + break; + case DT_MEDIA_BUS_FMT_RBG888_1X24: + desc->bus_format = MEDIA_BUS_FMT_RBG888_1X24; + desc->bpc = 8; + break; + case DT_MEDIA_BUS_FMT_RGB888_1X24: + desc->bus_format = MEDIA_BUS_FMT_RGB888_1X24; + desc->bpc = 8; + break; + case DT_MEDIA_BUS_FMT_RGB888_1X32_PADHI: + desc->bus_format = MEDIA_BUS_FMT_RGB888_1X32_PADHI; + desc->bpc = 8; + break; + default: + dev_err(dev, "%pOF: unknown bus-format property\n", np); + return -EINVAL; + } + } + /* Extract bus_flags from display_timing */ bus_flags = 0; vm.flags = timing->flags;