From 6470b7ddec69dc2edd4bcb01eab3cf71ead5f794 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 6 Feb 2018 10:35:37 +0100 Subject: drm/pl111: Handle the Versatile RGB/BGR565 mode The ARM Versatile series can do RGB/BGR565 with an external "PLD" (Programmable Logical Device). However the CLCD does not have control bits for this, so it needs to be set into the ordinary 16BPP mode, then the RGB/BGR565 handling of the pixel data is handled by configuring the PLD through the external register. Reviewed-by: Eric Anholt Signed-off-by: Linus Walleij Link: https://patchwork.freedesktop.org/patch/msgid/20180206093540.8147-2-linus.walleij@linaro.org --- drivers/gpu/drm/pl111/pl111_display.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/pl111') diff --git a/drivers/gpu/drm/pl111/pl111_display.c b/drivers/gpu/drm/pl111/pl111_display.c index 7fe4040aea46..55ada00ec974 100644 --- a/drivers/gpu/drm/pl111/pl111_display.c +++ b/drivers/gpu/drm/pl111/pl111_display.c @@ -199,10 +199,17 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe, cntl |= CNTL_LCDBPP24 | CNTL_BGR; break; case DRM_FORMAT_BGR565: - cntl |= CNTL_LCDBPP16_565; + if (priv->variant->is_pl110) + cntl |= CNTL_LCDBPP16; + else + cntl |= CNTL_LCDBPP16_565; break; case DRM_FORMAT_RGB565: - cntl |= CNTL_LCDBPP16_565 | CNTL_BGR; + if (priv->variant->is_pl110) + cntl |= CNTL_LCDBPP16; + else + cntl |= CNTL_LCDBPP16_565; + cntl |= CNTL_BGR; break; case DRM_FORMAT_ABGR1555: case DRM_FORMAT_XBGR1555: @@ -226,6 +233,10 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe, break; } + /* The PL110 in Integrator/Versatile does the BGR routing externally */ + if (priv->variant->external_bgr) + cntl &= ~CNTL_BGR; + /* Power sequence: first enable and chill */ writel(cntl, priv->regs + priv->ctrl); -- cgit v1.2.1