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media: imx: imx7_mipi_csis: Set the CLKSETTLE register field

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Set the CLKSETTLE field explicitly, with a value hardcoded to 0. This
brings no functional change, but prepares for calculation of the
CLKSETTLE value.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
Tested-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Laurent Pinchart 2021-04-13 04:29:59 +02:00 committed by Mauro Carvalho Chehab
parent b329650e3f
commit 996f6f517d
1 changed files with 10 additions and 4 deletions
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14
drivers/staging/media/imx/imx7-mipi-csis.c
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@ -310,6 +310,7 @@ struct csi_state {
u32 clk_frequency;
u32 hs_settle;
u32 clk_settle;
struct reset_control *mrst;
@ -540,11 +541,15 @@ static int mipi_csis_calculate_params(struct csi_state *state)
/*
* The HSSETTLE counter value is document in a table, but can also
* easily be calculated.
* easily be calculated. Hardcode the CLKSETTLE value to 0 for now
* (which is documented as corresponding to CSI-2 v0.87 to v1.00) until
* we figure out how to compute it correctly.
*/
state->hs_settle = (lane_rate - 5000000) / 45000000;
dev_dbg(state->dev, "lane rate %u, Ths_settle %u\n",
lane_rate, state->hs_settle);
state->clk_settle = 0;
dev_dbg(state->dev, "lane rate %u, Tclk_settle %u, Ths_settle %u\n",
lane_rate, state->clk_settle, state->hs_settle);
return 0;
}
@ -563,7 +568,8 @@ static void mipi_csis_set_params(struct csi_state *state)
__mipi_csis_set_format(state);
mipi_csis_write(state, MIPI_CSIS_DPHY_CMN_CTRL,
MIPI_CSIS_DPHY_CMN_CTRL_HSSETTLE(state->hs_settle));
MIPI_CSIS_DPHY_CMN_CTRL_HSSETTLE(state->hs_settle) |
MIPI_CSIS_DPHY_CMN_CTRL_CLKSETTLE(state->clk_settle));
val = (0 << MIPI_CSIS_ISP_SYNC_HSYNC_LINTV_OFFSET)
| (0 << MIPI_CSIS_ISP_SYNC_VSYNC_SINTV_OFFSET)