Claude review: drm/msm/dsi: Restore widebus calculation for CMDMode panels

[Claude Code Review Bot <claude-review@example.com>]

Patch Review

**Correctness: The fix is sound.** The commit message clearly explains the regression and why the removed check was necessary. The code change correctly restores the `bits_per_pclk = 48` path for command-mode DSC panels with widebus:

```c
-		if (wide_bus_enabled)
-			bits_per_pclk = mipi_dsi_pixel_format_to_bpp(msm_host->format);
-		else
+		if (wide_bus_enabled) {
+			if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO)
+				bits_per_pclk = mipi_dsi_pixel_format_to_bpp(msm_host->format);
+			else
+				bits_per_pclk = 48;
+		} else {
 			bits_per_pclk = 24;
+		}
```

**Minor observations:**

1. **Video-mode widebus path questionable (noted by author):** The author rightly questions in the cover notes whether `mipi_dsi_pixel_format_to_bpp()` makes sense for the video-mode widebus path — for RGB888 it returns 24, which is the same as the non-widebus case. This means widebus is still effectively a no-op for video mode DSC panels. However, this patch is correct in not trying to fix that — it's a minimal regression fix that restores the working CMD mode path without changing the (possibly still broken) video mode behavior.

2. **Commit message typo:** Line 99 says "add back the path allows" — should read "add back the path **that** allows".

3. **drm-next divergence:** As noted above, the drm-next tree at `dsi_host.c:1030-1033` already has:
   ```c
   if (wide_bus_enabled && !(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
       bytes_per_pclk = 6;
   else
       bytes_per_pclk = 3;
   ```
   This is functionally equivalent to the fix (6 bytes = 48 bits, 3 bytes = 24 bits for CMD mode), and also doesn't apply `mipi_dsi_pixel_format_to_bpp()` for video mode at all. The maintainers should clarify whether this patch is intended for a stable branch where the intermediate refactoring hasn't been applied.

**Verdict:** The fix is correct and well-motivated. The only action item is the minor typo in the commit message and clarifying the target tree/branch.

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