From: Linus Walleij <linus.walleij@linaro.org>
Date: Fri, 2 Mar 2018 10:09:45 +0100
Subject: drm/pl111: Make the default BPP a per-variant variable
Git-commit: 9f8d4fe94eb4fb958fc92ee91a3ec54ab378339c
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

The PL110, Integrator and Versatile boards strongly prefer to
use 16 BPP even if other modes are supported, both to keep down
memory consumption and also to easier find a good match to
supported resolutions with consideration taken to the memory
bandwidth of the platforms.

Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20180302090948.6399-2-linus.walleij@linaro.org
Link: https://patchwork.freedesktop.org/patch/msgid/20180307084316.23623-1-linus.walleij@linaro.org
Link: https://patchwork.freedesktop.org/patch/msgid/20180307084316.23623-1-linus.walleij@linaro.org

Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/pl111/pl111_drm.h       |    2 ++
 drivers/gpu/drm/pl111/pl111_drv.c       |    4 +++-
 drivers/gpu/drm/pl111/pl111_versatile.c |    2 ++
 3 files changed, 7 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/pl111/pl111_drm.h
+++ b/drivers/gpu/drm/pl111/pl111_drm.h
@@ -43,6 +43,7 @@ struct drm_minor;
  * @broken_vblank: the vblank IRQ is broken on this variant
  * @formats: array of supported pixel formats on this variant
  * @nformats: the length of the array of supported pixel formats
+ * @fb_bpp: desired bits per pixel on the default framebuffer
  */
 struct pl111_variant_data {
 	const char *name;
@@ -52,6 +53,7 @@ struct pl111_variant_data {
 	bool broken_vblank;
 	const u32 *formats;
 	unsigned int nformats;
+	unsigned int fb_bpp;
 };
 
 struct pl111_drm_dev_private {
--- a/drivers/gpu/drm/pl111/pl111_drv.c
+++ b/drivers/gpu/drm/pl111/pl111_drv.c
@@ -192,7 +192,7 @@ static int pl111_modeset_init(struct drm
 
 	drm_mode_config_reset(dev);
 
-	drm_fb_cma_fbdev_init(dev, 32, 0);
+	drm_fb_cma_fbdev_init(dev, priv->variant->fb_bpp, 0);
 
 	drm_kms_helper_poll_init(dev);
 
@@ -336,6 +336,7 @@ static const struct pl111_variant_data p
 	.is_pl110 = true,
 	.formats = pl110_pixel_formats,
 	.nformats = ARRAY_SIZE(pl110_pixel_formats),
+	.fb_bpp = 16,
 };
 
 /* RealView, Versatile Express etc use this modern variant */
@@ -360,6 +361,7 @@ static const struct pl111_variant_data p
 	.name = "PL111",
 	.formats = pl111_pixel_formats,
 	.nformats = ARRAY_SIZE(pl111_pixel_formats),
+	.fb_bpp = 32,
 };
 
 static const struct amba_id pl111_id_table[] = {
--- a/drivers/gpu/drm/pl111/pl111_versatile.c
+++ b/drivers/gpu/drm/pl111/pl111_versatile.c
@@ -241,6 +241,7 @@ static const struct pl111_variant_data p
 	.broken_vblank = true,
 	.formats = pl110_integrator_pixel_formats,
 	.nformats = ARRAY_SIZE(pl110_integrator_pixel_formats),
+	.fb_bpp = 16,
 };
 
 /*
@@ -253,6 +254,7 @@ static const struct pl111_variant_data p
 	.external_bgr = true,
 	.formats = pl110_versatile_pixel_formats,
 	.nformats = ARRAY_SIZE(pl110_versatile_pixel_formats),
+	.fb_bpp = 16,
 };
 
 int pl111_versatile_init(struct device *dev, struct pl111_drm_dev_private *priv)