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drm/exynos: decon: Make plane alpha configurable

Browse source 
The decon hardware supports variable plane alpha. Currently planes
are opaque, make this configurable.

Tested on TM2 with Exynos 5433 CPU, on top of linux-next-20181019.

Signed-off-by: Christoph Manszewski <c.manszewski@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Christoph Manszewski 2018-10-25 18:21:52 +02:00 committed by Inki Dae
parent 67fbf3a3ef
commit 54947290ef
2 changed files with 40 additions and 0 deletions
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33
drivers/gpu/drm/exynos/exynos5433_drm_decon.c
View file

@ -83,6 +83,14 @@ static const enum drm_plane_type decon_win_types[WINDOWS_NR] = {
[CURSON_WIN] = DRM_PLANE_TYPE_CURSOR,
};
static const unsigned int capabilities[WINDOWS_NR] = {
0,
EXYNOS_DRM_PLANE_CAP_WIN_BLEND,
EXYNOS_DRM_PLANE_CAP_WIN_BLEND,
EXYNOS_DRM_PLANE_CAP_WIN_BLEND,
EXYNOS_DRM_PLANE_CAP_WIN_BLEND,
};
static inline void decon_set_bits(struct decon_context *ctx, u32 reg, u32 mask,
u32 val)
{
@ -251,9 +259,30 @@ static void decon_commit(struct exynos_drm_crtc *crtc)
decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
}
static void decon_win_set_bldmod(struct decon_context *ctx, unsigned int win,
unsigned int alpha)
{
u32 win_alpha = alpha >> 8;
u32 val = 0;
if (alpha != DRM_BLEND_ALPHA_OPAQUE) {
val = VIDOSD_Wx_ALPHA_R_F(win_alpha) |
VIDOSD_Wx_ALPHA_G_F(win_alpha) |
VIDOSD_Wx_ALPHA_B_F(win_alpha);
decon_set_bits(ctx, DECON_VIDOSDxC(win),
VIDOSDxC_ALPHA0_RGB_MASK, val);
decon_set_bits(ctx, DECON_BLENDCON, BLEND_NEW, BLEND_NEW);
}
}
static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
struct drm_framebuffer *fb)
{
struct exynos_drm_plane plane = ctx->planes[win];
struct exynos_drm_plane_state *state =
to_exynos_plane_state(plane.base.state);
unsigned int alpha = state->base.alpha;
unsigned long val;
val = readl(ctx->addr + DECON_WINCONx(win));
@ -280,6 +309,7 @@ static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
val |= WINCONx_BPPMODE_32BPP_A8888;
val |= WINCONx_WSWP_F | WINCONx_BLD_PIX_F | WINCONx_ALPHA_SEL_F;
val |= WINCONx_BURSTLEN_16WORD;
val |= WINCONx_ALPHA_MUL_F;
break;
}
@ -299,6 +329,8 @@ static void decon_win_set_pixfmt(struct decon_context *ctx, unsigned int win,
}
writel(val, ctx->addr + DECON_WINCONx(win));
if (win > 0)
decon_win_set_bldmod(ctx, win, alpha);
}
static void decon_shadow_protect(struct decon_context *ctx, bool protect)
@ -551,6 +583,7 @@ static int decon_bind(struct device *dev, struct device *master, void *data)
ctx->configs[win].num_pixel_formats = ARRAY_SIZE(decon_formats);
ctx->configs[win].zpos = win - ctx->first_win;
ctx->configs[win].type = decon_win_types[win];
ctx->configs[win].capabilities = capabilities[win];
ret = exynos_plane_init(drm_dev, &ctx->planes[win], win,
&ctx->configs[win]);

7
drivers/gpu/drm/exynos/regs-decon5433.h
View file

@ -104,6 +104,7 @@
#define WINCONx_BURSTLEN_16WORD (0x0 << 10)
#define WINCONx_BURSTLEN_8WORD (0x1 << 10)
#define WINCONx_BURSTLEN_4WORD (0x2 << 10)
#define WINCONx_ALPHA_MUL_F (1 << 7)
#define WINCONx_BLD_PIX_F (1 << 6)
#define WINCONx_BPPMODE_MASK (0xf << 2)
#define WINCONx_BPPMODE_16BPP_565 (0x5 << 2)
@ -121,6 +122,9 @@
#define SHADOWCON_PROTECT_MASK GENMASK(14, 10)
#define SHADOWCON_Wx_PROTECT(n) (1 << (10 + (n)))
/* VIDOSDxC */
#define VIDOSDxC_ALPHA0_RGB_MASK (0xffffff)
/* VIDOSDxD */
#define VIDOSD_Wx_ALPHA_R_F(n) (((n) & 0xff) << 16)
#define VIDOSD_Wx_ALPHA_G_F(n) (((n) & 0xff) << 8)
@ -206,4 +210,7 @@
#define CRCCTRL_CRCEN (0x1 << 0)
#define CRCCTRL_MASK (0x7)
/* BLENDCON */
#define BLEND_NEW (1 << 0)
#endif /* EXYNOS_REGS_DECON5433_H */