On Tue, Dec 27, 2011 at 6:07 PM, Archit Taneja <archit@xxxxxx> wrote:
> Fill up dispc_wb_go(), dispc_wb_go_busy(), dispc_wb_enable() and
> dispc_wb_get_channel_in()/set_channel_in() with writeback register writes. Make
> a minor modification in dss_wb_write_regs_extra() to pass the plane_id instead
> of the writeback id when calling dispc_wb_set_channel_in().
>
> Setup dispc_wb_enable() as dispc_enable_lcd_out() function and wait for the
> FRAMEDONEWB interrupt while disabling writeback.
>
> Signed-off-by: Archit Taneja <archit@xxxxxx>
> ---
> drivers/video/omap2/dss/apply.c | 2 +-
> drivers/video/omap2/dss/dispc.c | 68 +++++++++++++++++++++++++++++++++++----
> drivers/video/omap2/dss/dss.h | 2 +-
> 3 files changed, 63 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/video/omap2/dss/apply.c b/drivers/video/omap2/dss/apply.c
> index dd1fd419..57b061f 100644
> --- a/drivers/video/omap2/dss/apply.c
> +++ b/drivers/video/omap2/dss/apply.c
> @@ -690,7 +690,7 @@ static void dss_wb_write_regs_extra(struct omap_dss_writeback *wb)
> if (!wp->extra_info_dirty)
> return;
>
> - dispc_wb_set_channel_in(wb->id, wp->channel_in);
> + dispc_wb_set_channel_in(wb->plane_id, wp->channel_in);
> dispc_ovl_set_fifo_threshold(wb->plane_id, wp->fifo_low, wp->fifo_high);
>
> wp->extra_info_dirty = false;
> diff --git a/drivers/video/omap2/dss/dispc.c b/drivers/video/omap2/dss/dispc.c
> index c7de56d..cbce120 100644
> --- a/drivers/video/omap2/dss/dispc.c
> +++ b/drivers/video/omap2/dss/dispc.c
> @@ -510,12 +510,26 @@ void dispc_mgr_go(enum omap_channel channel)
>
> bool dispc_wb_go_busy(int id)
> {
> - return false;
> + return REG_GET(DISPC_CONTROL2, 6, 6) == 1;
> }
>
> void dispc_wb_go(int id)
> {
> - return;
> + struct omap_dss_writeback *wb = omap_dss_get_writeback(id);
> + bool enable, go;
> +
> + enable = REG_GET(DISPC_OVL_ATTRIBUTES(wb->plane_id), 0, 0) == 1;
> +
> + if (!enable)
> + return;
> +
> + go = REG_GET(DISPC_CONTROL2, 6, 6) == 1;
> + if (go) {
> + DSSERR("GO bit not down for WB\n");
> + return;
> + }
> +
> + REG_FLD_MOD(DISPC_CONTROL2, 1, 6, 6);
> }
>
> static void dispc_ovl_write_firh_reg(enum omap_plane plane, int reg, u32 value)
> @@ -903,16 +917,24 @@ static enum omap_channel dispc_ovl_get_channel_out(enum omap_plane plane)
> return channel;
> }
>
> -void dispc_wb_set_channel_in(int id, enum dss_writeback_channel_in ch_in)
> +void dispc_wb_set_channel_in(int plane, enum dss_writeback_channel_in ch_in)
> {
> - return;
> + REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), ch_in, 18, 16);
> }
>
> static enum omap_channel dispc_wb_get_channel_in(int plane)
> {
> - /* Return LCD channel for now */
> + int channel_in = REG_GET(DISPC_OVL_ATTRIBUTES(plane), 18, 16);
>
> - return OMAP_DSS_CHANNEL_LCD;
> + switch (channel_in) {
> + case OMAP_DSS_WB_LCD2_MGR:
> + return OMAP_DSS_CHANNEL_LCD2;
> + case OMAP_DSS_WB_TV_MGR:
> + return OMAP_DSS_CHANNEL_DIGIT;
> + case OMAP_DSS_WB_LCD1_MGR:
> + default:
> + return OMAP_DSS_CHANNEL_LCD;
> + };
> }
>
What about other cases of pipelines and overlays here? You have
considered only overlays and that too ignored OMAP_DSS_CHANNEL_LCD3.
The channel_in parameter of DISPC_WB_ATTRIBUTES does handle the
following cases as well:
0x0: Primary LCD overlay output
0x1: Secondary LCD output
0x2: TV overlay output
0x7: Third LCD output
0x3: Graphics pipeline output
0x4: Video1 pipeline output
0x5: Video2 pipeline output
0x6: Video3 pipeline output
> static void dispc_ovl_set_burst_size(enum omap_plane plane,
> @@ -2138,7 +2160,39 @@ void dispc_mgr_enable(enum omap_channel channel, bool enable)
>
> void dispc_wb_enable(int id, bool enable)
> {
> - return;
> + struct omap_dss_writeback *wb = omap_dss_get_writeback(id);
> + enum omap_plane plane = wb->plane_id;
> + struct completion frame_done_completion;
> + bool is_on;
> + int r;
> + u32 irq;
> +
> + is_on = REG_GET(DISPC_OVL_ATTRIBUTES(plane), 0, 0);
> + irq = DISPC_IRQ_FRAMEDONEWB;
> +
> + if (!enable && is_on) {
> + init_completion(&frame_done_completion);
> +
> + r = omap_dispc_register_isr(dispc_disable_isr,
> + &frame_done_completion, irq);
> +
> + if (r)
> + DSSERR("failed to register FRAMEDONEWB isr\n");
> + }
> +
> + REG_FLD_MOD(DISPC_OVL_ATTRIBUTES(plane), enable ? 1 : 0, 0, 0);
> +
> + if (!enable && is_on) {
> + if (!wait_for_completion_timeout(&frame_done_completion,
> + msecs_to_jiffies(100)))
> + DSSERR("timeout waiting for FRAMEDONEWB\n");
> +
> + r = omap_dispc_unregister_isr(dispc_disable_isr,
> + &frame_done_completion, irq);
> +
> + if (r)
> + DSSERR("failed to unregister FRAMEDONEWB isr\n");
> + }
> }
>
> void dispc_lcd_enable_signal_polarity(bool act_high)
> diff --git a/drivers/video/omap2/dss/dss.h b/drivers/video/omap2/dss/dss.h
> index 69b4793..c05658b 100644
> --- a/drivers/video/omap2/dss/dss.h
> +++ b/drivers/video/omap2/dss/dss.h
> @@ -498,7 +498,7 @@ void dispc_wb_go(int id);
> int dispc_wb_setup(int id, struct omap_dss_writeback_info *wi,
> u16 in_width, u16 in_height);
> void dispc_wb_enable(int id, bool enable);
> -void dispc_wb_set_channel_in(int id, enum dss_writeback_channel_in ch_in);
> +void dispc_wb_set_channel_in(int plane, enum dss_writeback_channel_in ch_in);
>
> /* VENC */
> #ifdef CONFIG_OMAP2_DSS_VENC
> --
> 1.7.4.1
>
> --
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--
Chandrabhanu Mahapatra
Texas Instruments India Pvt. Ltd.
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