Hi Dafna,
Thank you for the patch.
On Mon, Mar 29, 2021 at 05:36:32PM +0200, Dafna Hirschfeld wrote:
> The mtk_hdmi does not support creating a bridge with a connector.
> Therefore the field 'conn' should be removed from the mtk_hdmi struct.
> It is replaced with a pointer curr_conn that points to the current
> connector which can be access through the global state.
>
> Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
The patch looks good to me, but I'd squash it with 2/3 otherwise I think
you'll break bisection. On the other hand, given that the HDMI support
is already broken... :-)
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
But you need to make sure this patch will get backported to stable along
2/3, probably by adding a fixes tag. Or squashing it with 2/3, up to
you.
> ---
> drivers/gpu/drm/mediatek/mtk_hdmi.c | 19 ++++++++++++++-----
> 1 file changed, 14 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index 1eeb211b1536..0d95d2cfe3de 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -153,7 +153,7 @@ struct mtk_hdmi_conf {
> struct mtk_hdmi {
> struct drm_bridge bridge;
> struct drm_bridge *next_bridge;
> - struct drm_connector conn;
> + struct drm_connector *curr_conn;/* current connector (only valid when 'enabled') */
> struct device *dev;
> const struct mtk_hdmi_conf *conf;
> struct phy *phy;
> @@ -969,7 +969,7 @@ static int mtk_hdmi_setup_avi_infoframe(struct mtk_hdmi *hdmi,
> ssize_t err;
>
> err = drm_hdmi_avi_infoframe_from_display_mode(&frame,
> - &hdmi->conn, mode);
> + hdmi->curr_conn, mode);
> if (err < 0) {
> dev_err(hdmi->dev,
> "Failed to get AVI infoframe from mode: %zd\n", err);
> @@ -1049,7 +1049,7 @@ static int mtk_hdmi_setup_vendor_specific_infoframe(struct mtk_hdmi *hdmi,
> ssize_t err;
>
> err = drm_hdmi_vendor_infoframe_from_display_mode(&frame,
> - &hdmi->conn, mode);
> + hdmi->curr_conn, mode);
> if (err) {
> dev_err(hdmi->dev,
> "Failed to get vendor infoframe from mode: %zd\n", err);
> @@ -1322,6 +1322,8 @@ static void mtk_hdmi_bridge_atomic_disable(struct drm_bridge *bridge,
> clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_HDMI_PIXEL]);
> clk_disable_unprepare(hdmi->clk[MTK_HDMI_CLK_HDMI_PLL]);
>
> + hdmi->curr_conn = NULL;
> +
> hdmi->enabled = false;
> }
>
> @@ -1385,8 +1387,13 @@ static void mtk_hdmi_send_infoframe(struct mtk_hdmi *hdmi,
> static void mtk_hdmi_bridge_atomic_enable(struct drm_bridge *bridge,
> struct drm_bridge_state *old_state)
> {
> + struct drm_atomic_state *state = old_state->base.state;
> struct mtk_hdmi *hdmi = hdmi_ctx_from_bridge(bridge);
>
> + /* Retrieve the connector through the atomic state. */
> + hdmi->curr_conn = drm_atomic_get_new_connector_for_encoder(state,
> + bridge->encoder);
> +
> mtk_hdmi_output_set_display_mode(hdmi, &hdmi->mode);
> clk_prepare_enable(hdmi->clk[MTK_HDMI_CLK_HDMI_PLL]);
> clk_prepare_enable(hdmi->clk[MTK_HDMI_CLK_HDMI_PIXEL]);
> @@ -1625,8 +1632,10 @@ static int mtk_hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf,
> {
> struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
>
> - memcpy(buf, hdmi->conn.eld, min(sizeof(hdmi->conn.eld), len));
> -
> + if (hdmi->enabled)
> + memcpy(buf, hdmi->curr_conn->eld, min(sizeof(hdmi->curr_conn->eld), len));
> + else
> + memset(buf, 0, len);
> return 0;
> }
>
--
Regards,
Laurent Pinchart
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