2015년 11월 23일 01:09에 Tobias Jakobi 이(가) 쓴 글:
> This updates the blending setup when the layer configuration
> changes (triggered by mixer_win_{commit,disable}).
>
> To avoid unnecesary reconfigurations we cache the layer
> state in the mixer context.
>
> Extra care has to be taken for the layer that is currently
> being enabled/disabled.
>
> Signed-off-by: Tobias Jakobi <tjakobi@xxxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/exynos/exynos_mixer.c | 41 +++++++++++++++++++++++++++++++++--
> 1 file changed, 39 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
> index ec9659e..1c24fb5 100644
> --- a/drivers/gpu/drm/exynos/exynos_mixer.c
> +++ b/drivers/gpu/drm/exynos/exynos_mixer.c
> @@ -99,6 +99,7 @@ struct mixer_context {
> struct exynos_drm_plane planes[MIXER_WIN_NR];
> const struct layer_cfg *layer_cfg;
> unsigned int num_layer;
> + u32 layer_state;
> int pipe;
> unsigned long flags;
> bool interlace;
> @@ -189,6 +190,27 @@ static inline bool is_alpha_format(const struct mixer_context* ctx, unsigned int
> }
> }
>
> +static inline u32 get_layer_state(const struct mixer_context *ctx,
> + unsigned int win, bool enable)
> +{
> + u32 enable_state, alpha_state;
> +
> + enable_state = ctx->layer_state & 0xffff;
> + alpha_state = ctx->layer_state >> 16;
> +
> + if (enable)
> + enable_state |= (1 << win);
> + else
> + enable_state &= ~(1 << win);
> +
> + if (enable && is_alpha_format(ctx, win))
> + alpha_state |= (1 << win);
> + else
> + alpha_state &= ~(1 << win);
> +
> + return ((alpha_state << 16) | enable_state);
> +}
> +
> static inline u32 vp_reg_read(struct mixer_resources *res, u32 reg_id)
> {
> return readl(res->vp_regs + reg_id);
> @@ -370,8 +392,9 @@ static void mixer_general_layer(struct mixer_context *ctx,
> {
> u32 val;
> struct mixer_resources *res = &ctx->mixer_res;
> + const u32 alpha_state = ctx->layer_state >> 16;
>
> - if (is_alpha_format(ctx, cfg->index)) {
> + if (alpha_state & (1 << cfg->index)) {
> val = MXR_GRP_CFG_COLOR_KEY_DISABLE; /* no blank key */
> val |= MXR_GRP_CFG_BLEND_PRE_MUL;
> val |= MXR_GRP_CFG_PIXEL_BLEND_EN; /* blending based on pixel alpha */
> @@ -397,10 +420,11 @@ static void mixer_general_layer(struct mixer_context *ctx,
> }
> }
>
> -static void mixer_layer_blending(struct mixer_context *ctx, unsigned int enable_state)
> +static void mixer_layer_blending(struct mixer_context *ctx)
> {
> unsigned int i, index;
> bool bottom_layer = false;
> + const u32 enable_state = ctx->layer_state & 0xffff;
>
> for (i = 0; i < ctx->num_layer; ++i) {
> index = ctx->layer_cfg[i].index;
> @@ -503,8 +527,19 @@ static void mixer_cfg_layer(struct mixer_context *ctx, unsigned int win,
> bool enable)
> {
> struct mixer_resources *res = &ctx->mixer_res;
> + u32 new_layer_state;
> u32 val = enable ? ~0 : 0;
>
> + new_layer_state = get_layer_state(ctx, win, enable);
> + if (new_layer_state == ctx->layer_state)
> + return;
> +
> + /*
> + * Update the layer state so that mixer_layer_blending()
> + * below can use it.
> + */
> + ctx->layer_state = new_layer_state;
It may be trivial but I think it'd be better to move above line to most bottom of this function.
> +
> switch (win) {
> case 0:
> mixer_reg_writemask(res, MXR_CFG, val, MXR_CFG_GRP0_ENABLE);
> @@ -520,6 +555,8 @@ static void mixer_cfg_layer(struct mixer_context *ctx, unsigned int win,
> }
> break;
> }
> +
> + mixer_layer_blending(ctx);
Here.
Thanks,
Inki Dae
> }
>
> static void mixer_run(struct mixer_context *ctx)
>
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