Hey Inki,
Inki Dae wrote:
>
>
> 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.
Sure, I can do that, but I would rather know what's the rationale here.
With best wishes,
Tobias
>> +
>> 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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