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| author | Philipp Zabel <p.zabel@pengutronix.de> | 2013-09-17 15:48:46 +0200 |
|---|---|---|
| committer | Philipp Zabel <p.zabel@pengutronix.de> | 2016-03-01 08:33:38 +0100 |
| commit | 86bdb09f044e1604add914e94d4f472052780ad9 (patch) | |
| tree | aa5f9213fefdc4d83774a77240d20181093aa78f /drivers/gpu/ipu-v3 | |
| parent | 16450616790af5ef5dda79e3081916af723756da (diff) | |
| download | linux-stable-86bdb09f044e1604add914e94d4f472052780ad9.tar.gz linux-stable-86bdb09f044e1604add914e94d4f472052780ad9.tar.bz2 linux-stable-86bdb09f044e1604add914e94d4f472052780ad9.zip | |
gpu: ipu-v3: ipu-dc: Simplify display controller microcode setup
This cleans up the display controller microcode setup in ipu_dc_init_sync
a little bit. The microcode template words for DI0 and DI1 are properly
separated to avoid a clash when DI1 is active in interlaced mode at the
same time as DI0 in non-interlaced mode.
A comment is added to explain the meaning of the sync counter.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'drivers/gpu/ipu-v3')
| -rw-r--r-- | drivers/gpu/ipu-v3/ipu-dc.c | 53 |
1 files changed, 26 insertions, 27 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-dc.c b/drivers/gpu/ipu-v3/ipu-dc.c index d3ad5347342c..2f29780e7c68 100644 --- a/drivers/gpu/ipu-v3/ipu-dc.c +++ b/drivers/gpu/ipu-v3/ipu-dc.c @@ -171,6 +171,7 @@ int ipu_dc_init_sync(struct ipu_dc *dc, struct ipu_di *di, bool interlaced, u32 bus_format, u32 width) { struct ipu_dc_priv *priv = dc->priv; + int addr, sync; u32 reg = 0; int map; @@ -182,41 +183,39 @@ int ipu_dc_init_sync(struct ipu_dc *dc, struct ipu_di *di, bool interlaced, return map; } - if (interlaced) { - int addr; - - if (dc->di) - addr = 1; - else - addr = 0; + /* + * In interlaced mode we need more counters to create the asymmetric + * per-field VSYNC signals. The pixel active signal synchronising DC + * to DI moves to signal generator #6 (see ipu-di.c). In progressive + * mode counter #5 is used. + */ + sync = interlaced ? 6 : 5; + + /* Reserve 5 microcode template words for each DI */ + if (dc->di) + addr = 5; + else + addr = 0; + if (interlaced) { dc_link_event(dc, DC_EVT_NL, addr, 3); dc_link_event(dc, DC_EVT_EOL, addr, 2); dc_link_event(dc, DC_EVT_NEW_DATA, addr, 1); /* Init template microcode */ - dc_write_tmpl(dc, addr, WROD(0), 0, map, SYNC_WAVE, 0, 6, 1); + dc_write_tmpl(dc, addr, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1); } else { - if (dc->di) { - dc_link_event(dc, DC_EVT_NL, 2, 3); - dc_link_event(dc, DC_EVT_EOL, 3, 2); - dc_link_event(dc, DC_EVT_NEW_DATA, 1, 1); - /* Init template microcode */ - dc_write_tmpl(dc, 2, WROD(0), 0, map, SYNC_WAVE, 8, 5, 1); - dc_write_tmpl(dc, 3, WROD(0), 0, map, SYNC_WAVE, 4, 5, 0); - dc_write_tmpl(dc, 4, WRG, 0, map, NULL_WAVE, 0, 0, 1); - dc_write_tmpl(dc, 1, WROD(0), 0, map, SYNC_WAVE, 0, 5, 1); - } else { - dc_link_event(dc, DC_EVT_NL, 5, 3); - dc_link_event(dc, DC_EVT_EOL, 6, 2); - dc_link_event(dc, DC_EVT_NEW_DATA, 8, 1); - /* Init template microcode */ - dc_write_tmpl(dc, 5, WROD(0), 0, map, SYNC_WAVE, 8, 5, 1); - dc_write_tmpl(dc, 6, WROD(0), 0, map, SYNC_WAVE, 4, 5, 0); - dc_write_tmpl(dc, 7, WRG, 0, map, NULL_WAVE, 0, 0, 1); - dc_write_tmpl(dc, 8, WROD(0), 0, map, SYNC_WAVE, 0, 5, 1); - } + dc_link_event(dc, DC_EVT_NL, addr + 2, 3); + dc_link_event(dc, DC_EVT_EOL, addr + 3, 2); + dc_link_event(dc, DC_EVT_NEW_DATA, addr + 1, 1); + + /* Init template microcode */ + dc_write_tmpl(dc, addr + 2, WROD(0), 0, map, SYNC_WAVE, 8, sync, 1); + dc_write_tmpl(dc, addr + 3, WROD(0), 0, map, SYNC_WAVE, 4, sync, 0); + dc_write_tmpl(dc, addr + 4, WRG, 0, map, NULL_WAVE, 0, 0, 1); + dc_write_tmpl(dc, addr + 1, WROD(0), 0, map, SYNC_WAVE, 0, sync, 1); } + dc_link_event(dc, DC_EVT_NF, 0, 0); dc_link_event(dc, DC_EVT_NFIELD, 0, 0); dc_link_event(dc, DC_EVT_EOF, 0, 0); |