Re: [Freedreno] [PATCH v2] drm/msm: reduce usage of round_pixclk callback

[Abhinav Kumar <quic_abhinavk@quicinc.com>]

On 1/5/2022 11:06 PM, Dmitry Baryshkov wrote:
> The round_pixclk() callback returns different rate only on MDP4 in HDMI
> (DTV) case. Stop using this callback in other cases to simplify
> mode_valid callbacks.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
> ---
> Changes since v1:
>   - Rebased on top of HDMI changes
>   - Dropped eDP part, driver got removed
> 
> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c  |  7 -------
>   drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c |  7 -------
>   drivers/gpu/drm/msm/dsi/dsi_manager.c    | 22 ----------------------
>   drivers/gpu/drm/msm/hdmi/hdmi_bridge.c   | 11 +++++++----
>   4 files changed, 7 insertions(+), 40 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index 47fe11a84a77..ebbee5f103e1 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -774,12 +774,6 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
>   	return ret;
>   }
>   
> -static long dpu_kms_round_pixclk(struct msm_kms *kms, unsigned long rate,
> -		struct drm_encoder *encoder)
> -{
> -	return rate;
> -}
> -
>   static void _dpu_kms_hw_destroy(struct dpu_kms *dpu_kms)
>   {
>   	int i;
> @@ -948,7 +942,6 @@ static const struct msm_kms_funcs kms_funcs = {
>   	.disable_vblank  = dpu_kms_disable_vblank,
>   	.check_modified_format = dpu_format_check_modified_format,
>   	.get_format      = dpu_get_msm_format,
> -	.round_pixclk    = dpu_kms_round_pixclk,
>   	.destroy         = dpu_kms_destroy,
>   	.snapshot        = dpu_kms_mdp_snapshot,
>   #ifdef CONFIG_DEBUG_FS
> diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> index 12a5f81e402b..20859fd7af4a 100644
> --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
> @@ -190,12 +190,6 @@ static void mdp5_complete_commit(struct msm_kms *kms, unsigned crtc_mask)
>   		mdp5_smp_complete_commit(mdp5_kms->smp, &global_state->smp);
>   }
>   
> -static long mdp5_round_pixclk(struct msm_kms *kms, unsigned long rate,
> -		struct drm_encoder *encoder)
> -{
> -	return rate;
> -}
> -
>   static int mdp5_set_split_display(struct msm_kms *kms,
>   		struct drm_encoder *encoder,
>   		struct drm_encoder *slave_encoder,
> @@ -278,7 +272,6 @@ static const struct mdp_kms_funcs kms_funcs = {
>   		.wait_flush      = mdp5_wait_flush,
>   		.complete_commit = mdp5_complete_commit,
>   		.get_format      = mdp_get_format,
> -		.round_pixclk    = mdp5_round_pixclk,
>   		.set_split_display = mdp5_set_split_display,
>   		.destroy         = mdp5_kms_destroy,
>   #ifdef CONFIG_DEBUG_FS
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> index f19bae475c96..1dbbfca163d9 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
> @@ -305,27 +305,6 @@ static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
>   	return num;
>   }
>   
> -static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *connector,
> -				struct drm_display_mode *mode)
> -{
> -	int id = dsi_mgr_connector_get_id(connector);
> -	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
> -	struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
> -	struct msm_drm_private *priv = connector->dev->dev_private;
> -	struct msm_kms *kms = priv->kms;
> -	long actual, requested;
> -
> -	DBG("");
> -	requested = 1000 * mode->clock;
> -	actual = kms->funcs->round_pixclk(kms, requested, encoder);
> -
> -	DBG("requested=%ld, actual=%ld", requested, actual);
> -	if (actual != requested)
> -		return MODE_CLOCK_RANGE;
> -
> -	return MODE_OK;
> -}
> -
>   static struct drm_encoder *
>   dsi_mgr_connector_best_encoder(struct drm_connector *connector)
>   {
> @@ -586,7 +565,6 @@ static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
>   
>   static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
>   	.get_modes = dsi_mgr_connector_get_modes,
> -	.mode_valid = dsi_mgr_connector_mode_valid,
>   	.best_encoder = dsi_mgr_connector_best_encoder,
>   };
>   
> diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
> index 68fba4bf7212..10ebe2089cb6 100644
> --- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
> +++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
> @@ -282,15 +282,18 @@ static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge
>   	long actual, requested;
>   
>   	requested = 1000 * mode->clock;
> -	actual = kms->funcs->round_pixclk(kms,
> -			requested, hdmi_bridge->hdmi->encoder);
>   
>   	/* for mdp5/apq8074, we manage our own pixel clk (as opposed to
>   	 * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
>   	 * instead):
>   	 */
> -	if (config->pwr_clk_cnt > 0)
> -		actual = clk_round_rate(hdmi->pwr_clks[0], actual);
> +	if (kms->funcs->round_pixclk)
> +		actual = kms->funcs->round_pixclk(kms,
> +			requested, hdmi_bridge->hdmi->encoder);
> +	else if (config->pwr_clk_cnt > 0)
> +		actual = clk_round_rate(hdmi->pwr_clks[0], requested);
> +	else
> +		actual = requested;
>   
>   	DBG("requested=%ld, actual=%ld", requested, actual);
>