[PATCH v4 78/80] drm/omap: dsi: fix and cleanup ddr_clk_always_on

[Laurent Pinchart]

Hi Tomi,

Thank you for the patch.

On Tue, Nov 24, 2020 at 02:45:36PM +0200, Tomi Valkeinen wrote:
> The driver ignores MIPI_DSI_CLOCK_NON_CONTINUOUS, and always uses
> non-continuous clock.
> 
> Fix this by using MIPI_DSI_CLOCK_NON_CONTINUOUS and at the same time,
> drop ddr_clk_always_on field which seems pretty useless.
> 
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen at ti.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart at ideasonboard.com>

> ---
>  drivers/gpu/drm/omapdrm/dss/dsi.c | 12 +++++-------
>  drivers/gpu/drm/omapdrm/dss/dsi.h |  2 --
>  2 files changed, 5 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
> index 6d20245495ac..6e9c99402540 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -1734,11 +1734,10 @@ static int dsi_cio_init(struct dsi_data *dsi)
>  
>  	dsi_cio_timings(dsi);
>  
> -	if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
> -		/* DDR_CLK_ALWAYS_ON */
> -		REG_FLD_MOD(dsi, DSI_CLK_CTRL,
> -			dsi->vm_timings.ddr_clk_always_on, 13, 13);
> -	}
> +	/* DDR_CLK_ALWAYS_ON */
> +	REG_FLD_MOD(dsi, DSI_CLK_CTRL,
> +		    !(dsi->dsidev->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS),
> +		    13, 13);
>  
>  	dsi->ulps_enabled = false;
>  
> @@ -3641,7 +3640,7 @@ static void dsi_setup_dsi_vcs(struct dsi_data *dsi)
>  	dsi_force_tx_stop_mode_io(dsi);
>  
>  	/* start the DDR clock by sending a NULL packet */
> -	if (dsi->vm_timings.ddr_clk_always_on)
> +	if (!(dsi->dsidev->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS))
>  		dsi_vc_send_null(dsi, VC_CMD, dsi->dsidev->channel);
>  }
>  
> @@ -4150,7 +4149,6 @@ static bool dsi_vm_calc_blanking(struct dsi_clk_calc_ctx *ctx)
>  	dsi_vm->hfp_blanking_mode = 1;
>  	dsi_vm->hbp_blanking_mode = 1;
>  
> -	dsi_vm->ddr_clk_always_on = cfg->ddr_clk_always_on;
>  	dsi_vm->window_sync = 4;
>  
>  	/* setup DISPC videomode */
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.h b/drivers/gpu/drm/omapdrm/dss/dsi.h
> index 7cc2cc748ed9..3543828e30eb 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.h
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.h
> @@ -209,7 +209,6 @@ struct omap_dss_dsi_videomode_timings {
>  
>  	enum omap_dss_dsi_trans_mode trans_mode;
>  
> -	bool ddr_clk_always_on;
>  	int window_sync;
>  };
>  
> @@ -221,7 +220,6 @@ struct omap_dss_dsi_config {
>  	unsigned long hs_clk_min, hs_clk_max;
>  	unsigned long lp_clk_min, lp_clk_max;
>  
> -	bool ddr_clk_always_on;
>  	enum omap_dss_dsi_trans_mode trans_mode;
>  };
> 

-- 
Regards,

Laurent Pinchart