Re: [PATCH v3 22/56] drm/omap: dsi: use pixel-format and mode from attach

Laurent Pinchart
2020-11-09T08:49:28Z

Hi Tomi and Sebastian,

Thank you for the patch.

On Thu, Nov 05, 2020 at 02:02:59PM +0200, Tomi Valkeinen wrote:
> From: Sebastian Reichel <sebastian.reichel@collabora.com>
>
> In order to reduce the amount of custom functionality, this moves
> handling of pixel format and DSI mode from set_config() to dsi
> attach.
>
> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
> ---
> .../gpu/drm/omapdrm/displays/panel-dsi-cm.c | 2 --
> drivers/gpu/drm/omapdrm/dss/dsi.c | 31 ++++++++++++-------
> 2 files changed, 19 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> index a9609eed6bfa..2e9de33fc8d4 100644
> --- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> +++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> @@ -550,8 +550,6 @@ static int dsicm_power_on(struct panel_drv_data *ddata)
> u8 id1, id2, id3;
> int r;
> struct omap_dss_dsi_config dsi_config = {
> - .mode = OMAP_DSS_DSI_CMD_MODE,
> - .pixel_format = MIPI_DSI_FMT_RGB888,
> .vm = &ddata->vm,
> .hs_clk_min = 150000000,
> .hs_clk_max = 300000000,
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
> index a16427f3bc23..e341aca92462 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -4579,24 +4579,19 @@ static int dsi_set_config(struct omap_dss_device *dssdev,
> {
> struct dsi_data *dsi = to_dsi_data(dssdev);
> struct dsi_clk_calc_ctx ctx;
> + struct omap_dss_dsi_config cfg = *config;
> bool ok;
> int r;
>
> mutex_lock(&dsi->lock);
>
> - dsi->pix_fmt = config->pixel_format;
> - dsi->mode = config->mode;
> + cfg.mode = dsi->mode;
> + cfg.pixel_format = dsi->pix_fmt;
>
> - if (mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt) < 0) {
> - DSSERR("invalid pixel format\n");
> - r = -EINVAL;
> - goto err;
> - }
> -
> - if (config->mode == OMAP_DSS_DSI_VIDEO_MODE)
> - ok = dsi_vm_calc(dsi, config, &ctx);
> + if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE)
> + ok = dsi_vm_calc(dsi, &cfg, &ctx);
> else
> - ok = dsi_cm_calc(dsi, config, &ctx);
> + ok = dsi_cm_calc(dsi, &cfg, &ctx);
>
> if (!ok) {
> DSSERR("failed to find suitable DSI clock settings\n");
> @@ -4607,7 +4602,7 @@ static int dsi_set_config(struct omap_dss_device *dssdev,
> dsi_pll_calc_dsi_fck(dsi, &ctx.dsi_cinfo);
>
> r = dsi_lp_clock_calc(ctx.dsi_cinfo.clkout[HSDIV_DSI],
> - config->lp_clk_min, config->lp_clk_max, &dsi->user_lp_cinfo);
> + cfg.lp_clk_min, cfg.lp_clk_max, &dsi->user_lp_cinfo);
> if (r) {
> DSSERR("failed to find suitable DSI LP clock settings\n");
> goto err;
> @@ -4785,7 +4780,19 @@ static int omap_dsi_host_attach(struct mipi_dsi_host *host,
> return -EBUSY;
> }
>
> + if (mipi_dsi_pixel_format_to_bpp(client->format) < 0) {
> + DSSERR("invalid pixel format\n");
> + return -EINVAL;
> + }
> +
> dsi->vc[channel].dest = client;
> +
> + dsi->pix_fmt = client->format;

Does this mean that all clients must use the same pixel format ? Do we
even support multiple clients ? If no the VC allocation could be
simplified.

> + if (client->mode_flags & MIPI_DSI_MODE_VIDEO)
> + dsi->mode = OMAP_DSS_DSI_VIDEO_MODE;
> + else
> + dsi->mode = OMAP_DSS_DSI_CMD_MODE;
> +
> return 0;
> }
>

--
Regards,

Laurent Pinchart