Commit e307126a authored by Jani Nikula's avatar Jani Nikula

drm/i915/dsi: improve dphy param limits logging

Move the limit checks near the calculations for each field, and actually
log the values that exceed limits.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180419085940.21505-1-jani.nikula@intel.com
parent 2a5b95b4
......@@ -647,6 +647,11 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id)
/* prepare count */
prepare_cnt = DIV_ROUND_UP(ths_prepare_ns * ui_den, ui_num * mul);
if (prepare_cnt > PREPARE_CNT_MAX) {
DRM_DEBUG_KMS("prepare count too high %u\n", prepare_cnt);
prepare_cnt = PREPARE_CNT_MAX;
}
/* exit zero count */
exit_zero_cnt = DIV_ROUND_UP(
(ths_prepare_hszero - ths_prepare_ns) * ui_den,
......@@ -662,32 +667,29 @@ bool intel_dsi_vbt_init(struct intel_dsi *intel_dsi, u16 panel_id)
if (exit_zero_cnt < (55 * ui_den / ui_num) && (55 * ui_den) % ui_num)
exit_zero_cnt += 1;
if (exit_zero_cnt > EXIT_ZERO_CNT_MAX) {
DRM_DEBUG_KMS("exit zero count too high %u\n", exit_zero_cnt);
exit_zero_cnt = EXIT_ZERO_CNT_MAX;
}
/* clk zero count */
clk_zero_cnt = DIV_ROUND_UP(
(tclk_prepare_clkzero - ths_prepare_ns)
* ui_den, ui_num * mul);
if (clk_zero_cnt > CLK_ZERO_CNT_MAX) {
DRM_DEBUG_KMS("clock zero count too high %u\n", clk_zero_cnt);
clk_zero_cnt = CLK_ZERO_CNT_MAX;
}
/* trail count */
tclk_trail_ns = max(mipi_config->tclk_trail, mipi_config->ths_trail);
trail_cnt = DIV_ROUND_UP(tclk_trail_ns * ui_den, ui_num * mul);
if (prepare_cnt > PREPARE_CNT_MAX ||
exit_zero_cnt > EXIT_ZERO_CNT_MAX ||
clk_zero_cnt > CLK_ZERO_CNT_MAX ||
trail_cnt > TRAIL_CNT_MAX)
DRM_DEBUG_DRIVER("Values crossing maximum limits, restricting to max values\n");
if (prepare_cnt > PREPARE_CNT_MAX)
prepare_cnt = PREPARE_CNT_MAX;
if (exit_zero_cnt > EXIT_ZERO_CNT_MAX)
exit_zero_cnt = EXIT_ZERO_CNT_MAX;
if (clk_zero_cnt > CLK_ZERO_CNT_MAX)
clk_zero_cnt = CLK_ZERO_CNT_MAX;
if (trail_cnt > TRAIL_CNT_MAX)
if (trail_cnt > TRAIL_CNT_MAX) {
DRM_DEBUG_KMS("trail count too high %u\n", trail_cnt);
trail_cnt = TRAIL_CNT_MAX;
}
/* B080 */
intel_dsi->dphy_reg = exit_zero_cnt << 24 | trail_cnt << 16 |
......
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