Hi Tobias,
2015년 11월 23일 01:09에 Tobias Jakobi 이(가) 쓴 글:
> First step in allowing a more generic way to setup complex
> blending for the different layers.
>
> Signed-off-by: Tobias Jakobi <tjakobi@xxxxxxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/exynos/exynos_mixer.c | 84 ++++++++++++++++++++++++++++++-----
> 1 file changed, 73 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
> index 7498c6e..2c1cea3 100644
> --- a/drivers/gpu/drm/exynos/exynos_mixer.c
> +++ b/drivers/gpu/drm/exynos/exynos_mixer.c
> @@ -63,6 +63,11 @@ struct mixer_resources {
> struct clk *mout_mixer;
> };
>
> +struct layer_cfg {
> + unsigned int index;
> + unsigned int priority;
> +};
> +
> enum mixer_version_id {
> MXR_VER_0_0_0_16,
> MXR_VER_16_0_33_0,
> @@ -92,6 +97,8 @@ struct mixer_context {
> struct drm_device *drm_dev;
> struct exynos_drm_crtc *crtc;
> struct exynos_drm_plane planes[MIXER_WIN_NR];
> + const struct layer_cfg *layer_cfg;
> + unsigned int num_layer;
> int pipe;
> unsigned long flags;
> bool interlace;
> @@ -110,6 +117,34 @@ struct mixer_drv_data {
> bool has_sclk;
> };
>
> +/*
> + * The default layer priorities for non-VP (video processor)
> + * and VP mixer configurations.
> + *
> + * A higher priority means that the layer is at the top of
> + * the layer stack.
> + * Configurations have to be specified with its entries
> + * sorted with increasing priority.
> + *
> + * The default config assumes the following usage scenario:
> + * layer1: OSD [top]
> + * layer0: main framebuffer
> + * video layer: video overlay [bottom]
> + * Note that the video layer is only usable when the
> + * VP is available.
> + */
> +
> +static const struct layer_cfg nonvp_default_cfg[] = {
> + { .index = 0, .priority = 1 }, /* layer0 */
> + { .index = 1, .priority = 2 }, /* layer1 */
> +};
> +
> +static const struct layer_cfg vp_default_cfg[] = {
> + { .index = 2, .priority = 1 }, /* video layer */
> + { .index = 0, .priority = 2 }, /* layer0 */
> + { .index = 1, .priority = 3 }, /* layer1 */
> +};
> +
> static const u8 filter_y_horiz_tap8[] = {
> 0, -1, -1, -1, -1, -1, -1, -1,
> -1, -1, -1, -1, -1, 0, 0, 0,
> @@ -268,6 +303,34 @@ static void vp_default_filter(struct mixer_resources *res)
> filter_cr_horiz_tap4, sizeof(filter_cr_horiz_tap4));
> }
>
> +static void mixer_layer_priority(struct mixer_context *ctx)
> +{
> + u32 val = 0;
> + unsigned int i, priority;
> +
> + for (i = 0; i < ctx->num_layer; ++i) {
> + priority = ctx->layer_cfg[i].priority;
> + BUG_ON(priority > 15);
What doesn constant, 15 mean? You need to clarify the meaning
and please, use a macro instead.
And it'd better to just return in this case so that the layer
configuration can be set with a default value.
I think it'd be enough to print out warning message.
Thanks,
Inki Dae
> +
> + switch (ctx->layer_cfg[i].index) {
> + case 0:
> + val |= MXR_LAYER_CFG_GRP0_VAL(priority);
> + break;
> + case 1:
> + val |= MXR_LAYER_CFG_GRP1_VAL(priority);
> + break;
> + case 2:
> + val |= MXR_LAYER_CFG_VP_VAL(priority);
> + break;
> + default:
> + BUG_ON(true);
> + break;
> + }
> + }
> +
> + mixer_reg_write(&ctx->mixer_res, MXR_LAYER_CFG, val);
> +}
> +
> static void mixer_vsync_set_update(struct mixer_context *ctx, bool enable)
> {
> struct mixer_resources *res = &ctx->mixer_res;
> @@ -673,17 +736,7 @@ static void mixer_win_reset(struct mixer_context *ctx)
> mixer_reg_writemask(res, MXR_STATUS, MXR_STATUS_16_BURST,
> MXR_STATUS_BURST_MASK);
>
> - /* setting default layer priority: layer1 > layer0 > video
> - * because typical usage scenario would be
> - * layer1 - OSD
> - * layer0 - framebuffer
> - * video - video overlay
> - */
> - val = MXR_LAYER_CFG_GRP1_VAL(3);
> - val |= MXR_LAYER_CFG_GRP0_VAL(2);
> - if (ctx->vp_enabled)
> - val |= MXR_LAYER_CFG_VP_VAL(1);
> - mixer_reg_write(res, MXR_LAYER_CFG, val);
> + mixer_layer_priority(ctx);
>
> /* setting background color */
> mixer_reg_write(res, MXR_BG_COLOR0, 0x008080);
> @@ -1209,6 +1262,15 @@ static int mixer_probe(struct platform_device *pdev)
> ctx->vp_enabled = drv->is_vp_enabled;
> ctx->has_sclk = drv->has_sclk;
> ctx->mxr_ver = drv->version;
> +
> + if (drv->is_vp_enabled) {
> + ctx->layer_cfg = vp_default_cfg;
> + ctx->num_layer = ARRAY_SIZE(vp_default_cfg);
> + } else {
> + ctx->layer_cfg = nonvp_default_cfg;
> + ctx->num_layer = ARRAY_SIZE(nonvp_default_cfg);
> + }
> +
> init_waitqueue_head(&ctx->wait_vsync_queue);
> atomic_set(&ctx->wait_vsync_event, 0);
>
>
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