Re: [PATCH v3 01/24] drm/rockchip: dw-mipi-dsi: don't configure hardware in mode_set for MIPI

Sean Paul
2017-01-30T15:35:36Z

On Sun, Jan 29, 2017 at 01:24:21PM +0000, John Keeping wrote:
> With atomic modesetting the hardware will be powered off when the
> mode_set function is called. We should configure the hardware in the
> enable function, which is the atomic version of "commit" so let's use
> the enable hook rather than commit while we're at it.
>

Reviewed-by: Sean Paul <seanpaul@chromium.org>

> Signed-off-by: John Keeping <john@metanate.com>
> ---
> v3:
> - Squash together with the commit to s/commit/enable/
> Unchanged in v2
>
> drivers/gpu/drm/rockchip/dw-mipi-dsi.c | 49 +++++++++++++++-------------------
> 1 file changed, 21 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> index d9aa382bb629..bbd992299f73 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi.c
> @@ -819,34 +819,8 @@ static void dw_mipi_dsi_encoder_mode_set(struct drm_encoder *encoder,
> struct drm_display_mode *adjusted_mode)
> {
> struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
> - int ret;
>
> dsi->mode = adjusted_mode;
> -
> - ret = dw_mipi_dsi_get_lane_bps(dsi);
> - if (ret < 0)
> - return;
> -
> - if (clk_prepare_enable(dsi->pclk)) {
> - dev_err(dsi->dev, "%s: Failed to enable pclk\n", __func__);
> - return;
> - }
> -
> - dw_mipi_dsi_init(dsi);
> - dw_mipi_dsi_dpi_config(dsi, mode);
> - dw_mipi_dsi_packet_handler_config(dsi);
> - dw_mipi_dsi_video_mode_config(dsi);
> - dw_mipi_dsi_video_packet_config(dsi, mode);
> - dw_mipi_dsi_command_mode_config(dsi);
> - dw_mipi_dsi_line_timer_config(dsi);
> - dw_mipi_dsi_vertical_timing_config(dsi);
> - dw_mipi_dsi_dphy_timing_config(dsi);
> - dw_mipi_dsi_dphy_interface_config(dsi);
> - dw_mipi_dsi_clear_err(dsi);
> - if (drm_panel_prepare(dsi->panel))
> - dev_err(dsi->dev, "failed to prepare panel\n");
> -
> - clk_disable_unprepare(dsi->pclk);
> }
>
> static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
> @@ -875,17 +849,36 @@ static void dw_mipi_dsi_encoder_disable(struct drm_encoder *encoder)
> clk_disable_unprepare(dsi->pclk);
> }
>
> -static void dw_mipi_dsi_encoder_commit(struct drm_encoder *encoder)
> +static void dw_mipi_dsi_encoder_enable(struct drm_encoder *encoder)
> {
> struct dw_mipi_dsi *dsi = encoder_to_dsi(encoder);
> int mux = drm_of_encoder_active_endpoint_id(dsi->dev->of_node, encoder);
> u32 val;
> + int ret;
> +
> + ret = dw_mipi_dsi_get_lane_bps(dsi);
> + if (ret < 0)
> + return;
>
> if (clk_prepare_enable(dsi->pclk)) {
> dev_err(dsi->dev, "%s: Failed to enable pclk\n", __func__);
> return;
> }
>
> + dw_mipi_dsi_init(dsi);
> + dw_mipi_dsi_dpi_config(dsi, dsi->mode);
> + dw_mipi_dsi_packet_handler_config(dsi);
> + dw_mipi_dsi_video_mode_config(dsi);
> + dw_mipi_dsi_video_packet_config(dsi, dsi->mode);
> + dw_mipi_dsi_command_mode_config(dsi);
> + dw_mipi_dsi_line_timer_config(dsi);
> + dw_mipi_dsi_vertical_timing_config(dsi);
> + dw_mipi_dsi_dphy_timing_config(dsi);
> + dw_mipi_dsi_dphy_interface_config(dsi);
> + dw_mipi_dsi_clear_err(dsi);
> + if (drm_panel_prepare(dsi->panel))
> + dev_err(dsi->dev, "failed to prepare panel\n");
> +
> dw_mipi_dsi_phy_init(dsi);
> dw_mipi_dsi_wait_for_two_frames(dsi);
>
> @@ -933,7 +926,7 @@ dw_mipi_dsi_encoder_atomic_check(struct drm_encoder *encoder,
>
> static struct drm_encoder_helper_funcs
> dw_mipi_dsi_encoder_helper_funcs = {
> - .commit = dw_mipi_dsi_encoder_commit,
> + .enable = dw_mipi_dsi_encoder_enable,
> .mode_set = dw_mipi_dsi_encoder_mode_set,
> .disable = dw_mipi_dsi_encoder_disable,
> .atomic_check = dw_mipi_dsi_encoder_atomic_check,
> --
> 2.11.0.197.gb556de5.dirty
>
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--
Sean Paul, Software Engineer, Google / Chromium OS