drm/tegra: Remove unused ->mode_fixup() callbacks

All output drivers have now been converted to use the ->atomic_check()
callback, so the ->mode_fixup() callbacks are no longer used.

Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 0 insertions, 87 deletions

diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
index 00b307120cdd..6875885a2dca 100644
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -786,92 +786,6 @@ static void tegra_dsi_encoder_dpms(struct drm_encoder *encoder, int mode)
 {
 }
 
-static bool tegra_dsi_encoder_mode_fixup(struct drm_encoder *encoder,
-                                         const struct drm_display_mode *mode,
-                                         struct drm_display_mode *adjusted)
-{
-        struct tegra_output *output = encoder_to_output(encoder);
-        struct tegra_dc *dc = to_tegra_dc(encoder->crtc);
-        unsigned int mul, div, scdiv, vrefresh, lanes;
-        struct tegra_dsi *dsi = to_dsi(output);
-        struct mipi_dphy_timing timing;
-        unsigned long pclk, bclk, plld;
-        unsigned long period;
-        int err;
-
-        lanes = tegra_dsi_get_lanes(dsi);
-        pclk = mode->clock * 1000;
-
-        err = tegra_dsi_get_muldiv(dsi->format, &mul, &div);
-        if (err < 0)
-                return err;
-
-        DRM_DEBUG_KMS("mul: %u, div: %u, lanes: %u\n", mul, div, lanes);
-        vrefresh = drm_mode_vrefresh(mode);
-        DRM_DEBUG_KMS("vrefresh: %u\n", vrefresh);
-
-        /* compute byte clock */
-        bclk = (pclk * mul) / (div * lanes);
-
-        /*
-         * Compute bit clock and round up to the next MHz.
-         */
-        plld = DIV_ROUND_UP(bclk * 8, USEC_PER_SEC) * USEC_PER_SEC;
-        period = DIV_ROUND_CLOSEST(NSEC_PER_SEC, plld);
-
-        /*
-         * We divide the frequency by two here, but we make up for that by
-         * setting the shift clock divider (further below) to half of the
-         * correct value.
-         */
-        plld /= 2;
-
-        /*
-         * Derive pixel clock from bit clock using the shift clock divider.
-         * Note that this is only half of what we would expect, but we need
-         * that to make up for the fact that we divided the bit clock by a
-         * factor of two above.
-         *
-         * It's not clear exactly why this is necessary, but the display is
-         * not working properly otherwise. Perhaps the PLLs cannot generate
-         * frequencies sufficiently high.
-         */
-        scdiv = ((8 * mul) / (div * lanes)) - 2;
-
-        err = tegra_dc_setup_clock(dc, dsi->clk_parent, plld, scdiv);
-        if (err < 0) {
-                dev_err(output->dev, "failed to setup DC clock: %d\n", err);
-                return false;
-        }
-
-        err = clk_set_rate(dsi->clk_parent, plld);
-        if (err < 0) {
-                dev_err(dsi->dev, "failed to set clock rate to %lu Hz\n",
-                        plld);
-                return false;
-        }
-
-        tegra_dsi_set_timeout(dsi, bclk, vrefresh);
-
-        err = mipi_dphy_timing_get_default(&timing, period);
-        if (err < 0)
-                return err;
-
-        err = mipi_dphy_timing_validate(&timing, period);
-        if (err < 0) {
-                dev_err(dsi->dev, "failed to validate D-PHY timing: %d\n", err);
-                return err;
-        }
-
-        /*
-         * The D-PHY timing fields are expressed in byte-clock cycles, so
-         * multiply the period by 8.
-         */
-        tegra_dsi_set_phy_timing(dsi, period * 8, &timing);
-
-        return true;
-}
-
 static void tegra_dsi_encoder_prepare(struct drm_encoder *encoder)
 {
 }
@@ -1053,7 +967,6 @@ tegra_dsi_encoder_atomic_check(struct drm_encoder *encoder,
 
 static const struct drm_encoder_helper_funcs tegra_dsi_encoder_helper_funcs = {
         .dpms = tegra_dsi_encoder_dpms,
-        .mode_fixup = tegra_dsi_encoder_mode_fixup,
         .prepare = tegra_dsi_encoder_prepare,
         .commit = tegra_dsi_encoder_commit,
         .mode_set = tegra_dsi_encoder_mode_set,