linux-kernel - [PATCH v6 2/6] drm/dsi: Add a helper to get bits per pixel of MIPI DSI pixel format

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Message-Id: <1450260616-21160-3-git-send-email-zyw@rock-chips.com>
Date:	Wed, 16 Dec 2015 18:10:12 +0800
From:	Chris Zhong <zyw@...k-chips.com>
To:	heiko@...ech.de, linux-rockchip@...ts.infradead.org,
	mark.yao@...k-chips.com, treding@...dia.com
Cc:	Liu Ying <Ying.liu@...escale.com>,
	Liu Ying <Ying.Liu@...escale.com>,
	Chris Zhong <zyw@...k-chips.com>,
	David Airlie <airlied@...ux.ie>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: [PATCH v6 2/6] drm/dsi: Add a helper to get bits per pixel of MIPI DSI pixel format

From: Liu Ying <Ying.liu@...escale.com>

Signed-off-by: Liu Ying <Ying.Liu@...escale.com>
Acked-by: Thierry Reding <treding@...dia.com>
Signed-off-by: Chris Zhong <zyw@...k-chips.com>
---

Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None

 include/drm/drm_mipi_dsi.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index f1d8d0d..3662021 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -163,6 +163,20 @@ static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev)
 	return container_of(dev, struct mipi_dsi_device, dev);
 }
 
+static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt)
+{
+	switch (fmt) {
+	case MIPI_DSI_FMT_RGB888:
+	case MIPI_DSI_FMT_RGB666:
+		return 24;
+	case MIPI_DSI_FMT_RGB666_PACKED:
+		return 18;
+	case MIPI_DSI_FMT_RGB565:
+		return 16;
+	}
+	return -EINVAL;
+}
+
 struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np);
 int mipi_dsi_attach(struct mipi_dsi_device *dsi);
 int mipi_dsi_detach(struct mipi_dsi_device *dsi);
-- 
2.6.3

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