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drm/pl111: Make the default BPP a per-variant variable

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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
This commit is contained in:
Linus Walleij 2018-03-02 10:09:45 +01:00
parent afe09e43b4
commit 9f8d4fe94e
3 changed files with 7 additions and 1 deletions
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2
drivers/gpu/drm/pl111/pl111_drm.h
View File

@ -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 {

4
drivers/gpu/drm/pl111/pl111_drv.c
View File

@ -192,7 +192,7 @@ static int pl111_modeset_init(struct drm_device *dev)
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 pl110_variant = {
.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 pl111_variant = {
.name = "PL111",
.formats = pl111_pixel_formats,
.nformats = ARRAY_SIZE(pl111_pixel_formats),
.fb_bpp = 32,
};
static const struct amba_id pl111_id_table[] = {

2
drivers/gpu/drm/pl111/pl111_versatile.c
View File

@ -241,6 +241,7 @@ static const struct pl111_variant_data pl110_integrator = {
.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 pl110_versatile = {
.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)