Lower modes on ADV7533 require lower number of DSI lanes for correct operation. If ADV7533 is being used with 4 DSI lanes, then switch the lanes to 3 when the target mode's pixel clock is less than 80 Mhz.
Based on patch by Andy Green andy.green@linaro.org
Signed-off-by: Archit Taneja architt@codeaurora.org --- drivers/gpu/drm/i2c/adv7511.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c index 88918ae..ca9e862 100644 --- a/drivers/gpu/drm/i2c/adv7511.c +++ b/drivers/gpu/drm/i2c/adv7511.c @@ -863,6 +863,26 @@ static void adv7511_mode_set(struct adv7511 *adv7511, regmap_update_bits(adv7511->regmap, 0x17, 0x60, (vsync_polarity << 6) | (hsync_polarity << 5));
+ if (adv7511->type == ADV7533 && adv7511->num_dsi_lanes == 4) { + struct mipi_dsi_device *dsi = adv7511->dsi; + int lanes, ret; + + if (adj_mode->clock > 80000) + lanes = 4; + else + lanes = 3; + + if (lanes != dsi->lanes) { + mipi_dsi_detach(dsi); + dsi->lanes = lanes; + ret = mipi_dsi_attach(dsi); + if (ret) { + DRM_ERROR("Failed to change host lanes\n"); + return; + } + } + } + drm_mode_copy(&adv7511->curr_mode, adj_mode);
/*